Problem with Audio in a basic music player in Android Studio

Problem with Audio in a basic music player in Android Studio - java

I created a basic music player app in Android Studio with the music file stored in the raw directory under resources and Mp3 format.
the issue is that though the toast inside the event listener gets displayed , the audio is not playing except once(i really do not know how).
the code is as below.
the manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.basicmusicplayer">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
the xml file
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
tools:context=".MainActivity">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/greetings"
android:textSize="30sp"
android:textStyle="bold"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/imageView"
android:layout_width="221dp"
android:layout_height="298dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="104dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.505"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView"
app:srcCompat="#android:drawable/ic_media_play" />
<Button
android:id="#+id/pause"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:text="#string/pause"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/stop"
app:layout_constraintHorizontal_bias="0.565"
app:layout_constraintStart_toEndOf="#+id/play"
app:layout_constraintTop_toBottomOf="#+id/imageView"
app:layout_constraintVertical_bias="0.205" />
<Button
android:id="#+id/play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:text="#string/play"
app:layout_constraintBaseline_toBaselineOf="#+id/pause"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="#+id/stop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:text="#string/stop"
app:layout_constraintBaseline_toBaselineOf="#+id/pause"
app:layout_constraintEnd_toEndOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
the java code
package com.example.basicmusicplayer;
import androidx.appcompat.app.AppCompatActivity;
import android.app.Activity;
import android.content.Context;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
MediaPlayer player;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/*
an object of class MediaPlayer created named player
a mp3 file is added to the object using create method*/
player = MediaPlayer.create(this, R.raw.adele);
// setting up inline event listeners to the button
// first comes the play button
Button play_music = findViewById(R.id.play);
play_music.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Playing sound",Toast.LENGTH_SHORT).show();
player.start();
}
});
// adding event listener on pause button
Button pause_music = findViewById(R.id.pause);
pause_music.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "paused sound",Toast.LENGTH_SHORT).show();
player.pause();
}
});
// adding event listener for stop button
Button stop_music = findViewById(R.id.stop);
stop_music.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "stopped sound",Toast.LENGTH_SHORT).show();
player.stop();
}
});
}
}

private MediaPlayer mp;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button b = (Button) findViewById(R.id.button1);
final TextView t = (TextView) findViewById(R.id.textView1);
b.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
stopPlaying();
mp = MediaPlayer.create(PlayaudioActivity.this, R.raw.far);
mp.start();
}
});
}
private void stopPlaying() {
if (mp != null) {
mp.stop();
mp.release();
mp = null;
}
}

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I am trying to open up the second activity (MainActivity2) via a button but the application crashes every time, I am not quite sure how to solve this. I want to be able to open to the second screen to use the second activity. Thank you for your help. (Having trouble with separating the code, so I have used lines)
Activity main xml + Main activity
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="241dp"
android:text="Activity1"
android:id="#+id/textView"/>
<Button
android:id="#+id/button"
android:layout_width="375dp"
android:layout_height="101dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="275dp"
android:text="open password generator" />
</RelativeLayout>
**Main activity**
package com.example.menutest;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
private Button button;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
openActivity2();
}
});
}
public void openActivity2() {
Intent intent = new Intent(this, MainActivity2.class);
startActivity(intent);
}
}
activity main2 + activity main 2 XML + manifest
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity2">
<TextView
android:id="#+id/textView3"
android:layout_width="203dp"
android:layout_height="85dp"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginStart="67dp"
android:layout_marginLeft="67dp"
android:layout_marginTop="264dp"
android:hapticFeedbackEnabled="false"
android:textColor="#070505"
android:textSize="18sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.653"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_alignParentLeft="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="19dp"
android:layout_marginLeft="19dp"
android:layout_marginBottom="304dp"
android:hapticFeedbackEnabled="true"
android:soundEffectsEnabled="false"
android:text="Generate strong password"
android:textSize="18sp"
android:textStyle="bold"
app:backgroundTint="#36A13A"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.59" />
</RelativeLayout>
***Mainactivity2***
package com.example.menutest;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.Random;
public class MainActivity2 extends AppCompatActivity {
Button button;
TextView textView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
button = (Button)findViewById(R.id.button);
textView = (TextView)findViewById(R.id.textView);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
textView.setText(generateString(16));
}
});
}
private String generateString(int length) {
char[] chars ="/.,MNBVCXZ;LKJHGFDSAPOIUYTREWQ[]#=-)0987654321!£$*&qwertyuiopzxcvbnmasdfghjkl(".toCharArray();
StringBuilder stringBuilder = new StringBuilder();
Random random = new Random();
for ( int i=0; i<length;i++)
{
char c = chars[random.nextInt(chars.length)];
stringBuilder.append(c);
}
return stringBuilder.toString();
}
}
***AndroidManifest xml***
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.menutest">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/Theme.MENUTEST">
<activity android:name=".MainActivity2"></activity>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
..........................................................................

Mainactivity2
button = (Button)findViewById(R.id.button4);
textView = (TextView)findViewById(R.id.textView3);

I'm trying to add Splash Screen to my app

I have been trying to implement splash Screen to my app with help of many codes avaible in sites , but none worked for me.
Each time the app is crashing after displaying splash screen for 3 secs.
I don't know where i'm going wrong , please make corrections to my code to display splash screen correctly ! Thank You !
//This is my Main activity
1. public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button one = (Button) this.findViewById(R.id.gg);
final MediaPlayer mp1 = MediaPlayer.create(this, R.raw.gg);
one.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Good Game", Toast.LENGTH_SHORT).show();
mp1.start();
}
});
Button two = (Button) this.findViewById(R.id.gm);
final MediaPlayer mp2 = MediaPlayer.create(this, R.raw.gm);
two.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Oh, They got me!", Toast.LENGTH_SHORT).show();
mp2.start();
}
});
Button three = (Button) this.findViewById(R.id.cb);
final MediaPlayer mp3 = MediaPlayer.create(this, R.raw.cb);
three.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Come on boy", Toast.LENGTH_SHORT).show();
mp3.start();
}
});
Button four = (Button) this.findViewById(R.id.ns);
final MediaPlayer mp4 = MediaPlayer.create(this, R.raw.ns);
four.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Nice shot", Toast.LENGTH_SHORT).show();
mp4.start();
}
});
Button five = (Button) this.findViewById(R.id.wp);
final MediaPlayer mp5 = MediaPlayer.create(this, R.raw.wp);
five.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "You wanna piece of me!", Toast.LENGTH_SHORT).show();
mp5.start();
}
});
Button six = (Button) this.findViewById(R.id.bi);
final MediaPlayer mp6 = MediaPlayer.create(this, R.raw.bi);
six.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Bring it", Toast.LENGTH_SHORT).show();
mp6.start();
}
});
Button seven = (Button) this.findViewById(R.id.lg);
final MediaPlayer mp7 = MediaPlayer.create(this, R.raw.lg);
seven.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Let’s go, Yeah!", Toast.LENGTH_SHORT).show();
mp7.start();
}
});
Button eight = (Button) this.findViewById(R.id.ru);
final MediaPlayer mp8 = MediaPlayer.create(this, R.raw.ru);
eight.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Ready Up", Toast.LENGTH_SHORT).show();
mp8.start();
}
});
Button nine = (Button) this.findViewById(R.id.nn);
final MediaPlayer mp9 = MediaPlayer.create(this, R.raw.nn);
nine.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Nooooo", Toast.LENGTH_SHORT).show();
mp9.start();
}
});
Button ten = (Button) this.findViewById(R.id.cm);
final MediaPlayer mp10 = MediaPlayer.create(this, R.raw.cm);
ten.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Cover me", Toast.LENGTH_SHORT).show();
mp10.start();
}
});
Button eleven = (Button) this.findViewById(R.id.hh);
final MediaPlayer mp11 = MediaPlayer.create(this, R.raw.hh);
eleven.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Hoo-ya", Toast.LENGTH_SHORT).show();
mp11.start();
}
});
Button twelve = (Button) this.findViewById(R.id.mo);
final MediaPlayer mp12 = MediaPlayer.create(this, R.raw.mo);
twelve.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Move out", Toast.LENGTH_SHORT).show();
mp12.start();
}
});
Button thirteen = (Button) this.findViewById(R.id.gs);
final MediaPlayer mp13 = MediaPlayer.create(this, R.raw.gs);
thirteen.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(MainActivity.this, "Get Some", Toast.LENGTH_SHORT).show();
mp13.start();
}
});
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Your Messege",Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
//This is my activity_main.xml
2. <android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.example.android.mmm.MainActivity">
<android.support.design.widget.AppBarLayout
android:id="#+id/app_bar"
android:layout_width="match_parent"
android:layout_height="#dimen/app_bar_height"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.design.widget.CollapsingToolbarLayout
android:id="#+id/toolbar_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:contentScrim="?attr/colorPrimary"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_main" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/fab_margin"
app:layout_anchor="#id/app_bar"
app:layout_anchorGravity="bottom|end"
app:srcCompat="#android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
//This is content_main.xml
3. <android.support.v4.widget.NestedScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.example.android.mmm.MainActivity"
tools:showIn="#layout/activity_main">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#000000">
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="GG"
android:id="#+id/gg"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:id="#+id/gm"
android:layout_width="100dp"
android:layout_height="48dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="16dp"
android:text="GM"
android:textAllCaps="true"
android:textColor="#000000"
android:textSize="18sp"
android:textStyle="bold"
tools:ignore="HardcodedText" />
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="CB"
android:id="#+id/cb"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="NS"
android:id="#+id/ns"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="WP"
android:id="#+id/wp"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="BI"
android:id="#+id/bi"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="LG"
android:id="#+id/lg"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="RU"
android:id="#+id/ru"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="NN"
android:id="#+id/nn"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="CM"
android:id="#+id/cm"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="HH"
android:id="#+id/hh"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="MO"
android:id="#+id/mo"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_gravity="center_horizontal"/>
<Button
android:layout_width="100dp"
android:layout_height="48dp"
android:text="GS"
android:id="#+id/gs"
android:textSize="18sp"
android:textAllCaps="true"
android:textStyle="bold"
android:textColor="#000000"
tools:ignore="HardcodedText"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:layout_gravity="center_horizontal"/>
</LinearLayout>
</android.support.v4.widget.NestedScrollView>
//This is AndroidManifest.xml
4. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.mmm">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".SplashActivity"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
</activity>
</application>
//This is styles.xml
5. <resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
</resources>
//This is my SplashActivity.Java
public class SplashScreen extends Activity {
// Splash screen timer
private static int SPLASH_TIME_OUT = 3000;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
new Handler().postDelayed(new Runnable() {
/*
* Showing splash screen with a timer. This will be useful when you
* want to show case your app logo / company
*/
#Override
public void run() {
// This method will be executed once the timer is over
// Start your app main activity
Intent i = new Intent(SplashScreen.this, MainActivity.class);
startActivity(i);
// close this activity
finish();
}
}, SPLASH_TIME_OUT);
}
}
6. //This is activity_splash.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:src="#drawable/wwe_logo" />
</RelativeLayout>

AppCompatActivity has it's own toolbar so you need to remove it by using android:theme="#style/AppTheme.NoActionBar" in manifest
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar">
</activity>
Although if you are not doing much customization in your toolbar then your can also skip creating your own toolbar by removing it from XML and removing it's initialization from java code as well but by doing this , you will lose the feature of collapsing toolbar

Making a splash screen is actually pretty easy.
1. Create drawable
In my case, I created a drawable named splash.xml:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
android:opacity="opaque">
<item android:drawable="#color/colorWhite" />
<item>
<bitmap
android:gravity="center"
android:src="#drawable/sensesmart_icon" />
</item>
2. Add drawable to your styles.xml
Here I just added my drawable to styles:
<style name="SplashTheme" parent="AppTheme">
<item name="android:windowBackground">#drawable/splash</item>
</style>
3. Add splash to manifest
You want to actually tell your app that the splash layout should show before the app has loaded:
<activity android:name=".BaseActivity"
android:screenOrientation="portrait"
android:theme="#style/SplashTheme"> <!--Splash screen-->
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
4. Set theme on your starting activity
In my case, BaseActivity is the activity which starts my application, so inside my onCreate(), I start with setting my theme:
protected void onCreate(Bundle savedInstanceState) {
setTheme(R.style.AppTheme);
setContentView(R.layout.activity_base);
super.onCreate(savedInstanceState);
}
This is the only thing you need to do. If you use this method, the splash screen doesn't stay for longer than it needs. Your contentView will start as soon as you have loaded your app.
Hope this helps!

How to fix SMS sending error in android 6

I have made a app which uses phones SMS sending, reading permission. It sends a message on button click and displays incoming message from a particular number.
It is working fine with Android 5 and older versions of android but is not working with Android 6. When android 6 users are pressing the button, app is crashing. I am sharing my code below, please help me fix this error.
Main_Activity.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="tti.traceanyvehiclewithdetails.MainActivity">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/imageView"
android:src="#drawable/ffff"
android:alpha="0.4"
android:scaleType="fitCenter"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:id="#+id/btnSendSMS"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/send_sms"
android:minHeight="60dp"
android:background="#f4843e"
android:textColor="#000000"
android:textSize="33dp"
android:layout_gravity="center"
android:layout_alignParentBottom="true"
android:layout_marginBottom="50dp"
android:layout_alignRight="#+id/imageView"
android:layout_alignEnd="#+id/imageView" />
<EditText
android:id="#+id/enterDetail"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:inputType="textMultiLine"
android:lines="1"
android:gravity="top"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="74dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Enter Vehicle Number:"
android:id="#+id/textView"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:clickable="false"
android:contextClickable="false"
android:textSize="35dp"
android:paddingTop="4dp"
android:paddingLeft="3dp" />
<TextView
android:id="#+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/enterDetail"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:longClickable="true"
android:textSize="25dp"
android:typeface="sans"
android:contextClickable="true"
android:clickable="true"
android:textColor="#0066ff"
android:layout_marginTop="5dp"
android:paddingLeft="5dp"
android:paddingTop="2dp"
android:paddingRight="5dp"
android:paddingBottom="5dp"
android:textStyle="bold"
android:textIsSelectable="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Example: DL 15Y 2597"
android:id="#+id/textView2"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="47dp"
android:paddingLeft="6dp" />
<!-- view for AdMob Banner Ad -->
<com.google.android.gms.ads.AdView
android:id="#+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
ads:adSize="BANNER"
ads:adUnitId="#string/banner_ad_unit_id" />
<ProgressBar
style="?android:attr/progressBarStyleLarge"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/progressBar"
android:progressDrawable="#drawable/circular_progress_bar"
android:layout_below="#+id/textView1"
android:layout_above="#+id/btnSendSMS"
android:layout_alignRight="#+id/textView"
android:layout_alignEnd="#+id/textView"
android:layout_alignLeft="#+id/adView"
android:layout_alignStart="#+id/adView"
android:padding="60dp"
android:layout_marginTop="30dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="#+id/textView3"
android:layout_alignTop="#+id/textView1"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:paddingLeft="15dp"
android:paddingRight="15dp"
android:textColor="#ee2467"
android:textSize="25dp" />
</RelativeLayout>
Mainactivity.java:
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.InterstitialAd;
public class MainActivity extends AppCompatActivity {
InterstitialAd mInterstitialAd;
Button btnSendSMS;
EditText enteredNum;
IntentFilter intentFilter;
private BroadcastReceiver intentReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
//---display the SMS received in the TextView---
TextView loadingMsg = (TextView) findViewById(R.id.textView3);
loadingMsg.setText("");
spinner.setVisibility(View.GONE);
TextView SMSes = (TextView) findViewById(R.id.textView1);
SMSes.setText(intent.getExtras().getString("sms"));
}
};
public ProgressBar spinner;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView loadingMsg = (TextView) findViewById(R.id.textView3);
intentFilter = new IntentFilter();
intentFilter.addAction("SMS_RECEIVED_ACTION");
btnSendSMS = (Button) findViewById(R.id.btnSendSMS);
spinner=(ProgressBar)findViewById(R.id.progressBar);
spinner.setVisibility(View.GONE);
mInterstitialAd = new InterstitialAd(this);
mInterstitialAd.setAdUnitId("ca-app-pub-3940256099942544/1033173712");
mInterstitialAd.setAdListener(new AdListener() {
#Override
public void onAdClosed() {
requestNewInterstitial();
}
});
requestNewInterstitial();
btnSendSMS.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
enteredNum = (EditText) findViewById(R.id.enterDetail);
assert enteredNum != null;
sendSMS("+917738299899", "VAHAN " + enteredNum.getText().toString().replaceAll(" ", "").toUpperCase());
Toast.makeText(getApplicationContext(), "Please wait while Loading Vehicle Details", Toast.LENGTH_LONG).show();
if (mInterstitialAd.isLoaded()) {
mInterstitialAd.show();
}
spinner.setVisibility(View.VISIBLE);
loadingMsg.setText("Please wait while vehicle details are loading, it usually takes less than 30 seconds.");
TextView SMSes = (TextView) findViewById(R.id.textView1);
SMSes.setText("");
}
});
// Load an ad into the AdMob banner view.
AdView adView = (AdView) findViewById(R.id.adView);
AdRequest adRequest = new AdRequest.Builder()
.setRequestAgent("android_studio:ad_template").build();
adView.loadAd(adRequest);
}
private void requestNewInterstitial() {
AdRequest adRequest = new AdRequest.Builder()
.addTestDevice("SEE_YOUR_LOGCAT_TO_GET_YOUR_DEVICE_ID")
.build();
mInterstitialAd.loadAd(adRequest);
}
#Override
protected void onResume() {
//---register the receiver---
registerReceiver(intentReceiver, intentFilter);
super.onResume();
}
#Override
protected void onPause() {
//---unregister the receiver---
unregisterReceiver(intentReceiver);
super.onPause();
}
private void sendSMS(String phoneNumber, String message)
{
SmsManager sms = SmsManager.getDefault();
sms.sendTextMessage(phoneNumber, null, message, null, null);
}
}
SMSReceiver.java:
package tti.traceanyvehiclewithdetails;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
public class SMSReceiver extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent)
{
//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
String str = "";
int c=0;
if (bundle != null)
{
//---retrieve the SMS message received---
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++){
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
if(msgs[i].getOriginatingAddress().indexOf("VAAHAN")!= -1) {
c=1;
str += msgs[i].getMessageBody().toString();
str += "\n";
}
}
if(c==1) {
//---send a broadcast intent to update the SMS received in the activity---
Intent broadcastIntent = new Intent();
broadcastIntent.setAction("SMS_RECEIVED_ACTION");
broadcastIntent.putExtra("sms", str);
context.sendBroadcast(broadcastIntent);
}
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="tti.traceanyvehiclewithdetails">
<!-- Include required permissions for Google Mobile Ads to run. -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.SEND_SMS"></uses-permission>
<uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<!-- This meta-data tag is required to use Google Play Services. -->
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<activity
android:name=".MainActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Include the AdActivity configChanges and theme. -->
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:theme="#android:style/Theme.Translucent" />
<receiver android:name=".SMSReceiver">
<intent-filter>
<action android:name=
"android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
</application>
</manifest>

for Android 6.0 and above you need to request permissions at runtime.
please refer this :
https://developer.android.com/training/permissions/requesting.html
You may use a 3rd party library as well.
look here :
https://android-arsenal.com/tag/235

Too many output application using Android Studio?

Running the app cause no problem but it shows a warning
Too many Output!
Surprisingly when I check my phone because I use it as my deployment output instead of a virtual device, there are 3 application that was installed. Here's the screen shot.
phone screenshot
Here's my Java Codes
MainActivity.Java
package com.faacts.jayson.faactsv004;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button;
button = (Button) findViewById(R.id.btnEnglish);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getBaseContext(), Index.class);
startActivity(intent);
}
});
}
}
Splash.Java
package com.faacts.jayson.faactsv004;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
/**
* Created by Jayson on 5/22/2016.
*/
public class Splash extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
final ImageView iv = (ImageView) findViewById(R.id.imageView);
final Animation an = AnimationUtils.loadAnimation(getBaseContext(), R.anim.rotate);
final Animation an2 = AnimationUtils.loadAnimation(getBaseContext(),R.anim.abc_fade_out);
iv.startAnimation(an);
an.setAnimationListener(new Animation.AnimationListener() {
#Override
public void onAnimationStart(Animation animation) {
}
#Override
public void onAnimationEnd(Animation animation) {
iv.startAnimation(an2);
finish();
Intent i = new Intent(getBaseContext(), MainActivity.class);
startActivity(i);
}
#Override
public void onAnimationRepeat(Animation animation) {
}
});
}
}
Index.Java
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
/**
* Created by Jayson on 5/22/2016.
*/
public class Index extends AppCompatActivity {
EditText txtpassword;
CheckBox chkbox;
#Override
protected void onCreate(Bundle saveInstanceState) {
super.onCreate(saveInstanceState);
setContentView(R.layout.index);
Button button;
button = (Button) findViewById(R.id.btnRegister);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getBaseContext(), Registration.class);
startActivity(intent);
}
});
txtpassword = (EditText) findViewById(R.id.txtPassword);
chkbox = (CheckBox) findViewById(R.id.chkBox);
chkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// checkbox status is changed from uncheck to checked.
if (!isChecked) {
// show password
txtpassword.setTransformationMethod(PasswordTransformationMethod.getInstance());
chkbox.setText("Reveal Password");
} else {
// hide password
txtpassword.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
chkbox.setText("Hide Password");
}
}
});
}
}
Registration.Java
package com.faacts.jayson.faactsv004;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.AdapterView.OnItemSelectedListener;
/**
* Created by Jayson on 5/22/2016.
*/
public class Registration extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.registration);
Spinner staticSpinner = (Spinner) findViewById(R.id.static_spinner);
// Create an ArrayAdapter using the string array and a default spinner
ArrayAdapter<CharSequence> staticAdapter = ArrayAdapter
.createFromResource(this, R.array.gender_array,
android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
staticAdapter
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
staticSpinner.setAdapter(staticAdapter);
}
}
This is the example of my xml
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:background="#33ccff"
android:clickable="false"
style="#style/AppTheme">
<ImageView
android:layout_width="600dp"
android:layout_height="700dp"
android:id="#+id/imageView3"
android:src="#drawable/welcomepage"
android:layout_marginBottom="200dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:contentDescription="#string/welcomepage"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Choose your language:"
android:id="#+id/textView"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="165dp"
android:textColor="#003333"
android:textStyle="bold" />
<Button
android:layout_width="180dp"
android:layout_height="wrap_content"
android:text="#string/btnFilipino"
android:id="#+id/btnFilipino"
android:layout_alignTop="#+id/textView"
android:layout_centerHorizontal="true"
android:layout_marginTop="40dp"
android:background="#drawable/bkg"
android:textColor="#000066"
android:textSize="25sp"
android:textStyle="bold" />
<Button
android:layout_width="180dp"
android:layout_height="wrap_content"
android:text="#string/btnEnglish"
android:id="#+id/btnEnglish"
android:background="#drawable/bkg"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="40dp"
android:textColor="#000066"
android:textSize="25sp"
android:textStyle="bold" />
</RelativeLayout>
index.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".Index"
android:background="#33ccff"
android:clickable="false"
style="#style/AppTheme">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#33ccff">
<ImageView
android:layout_width="380dp"
android:layout_height="90dp"
android:layout_marginTop="50dp"
android:id="#+id/imgULogo"
android:layout_gravity="center_horizontal"
android:src="#drawable/upperlogo2"
android:contentDescription="#string/upperlogo" />
<EditText
android:layout_width="318dp"
android:layout_height="40dp"
android:layout_marginTop="40dp"
android:layout_gravity="center_horizontal"
android:id="#+id/txtUsername"
android:background="#ffffff"
android:hint="#string/username"
android:textColorHint="#color/dim_foreground_material_dark"
android:textColor="#000000"
android:inputType="text" />
<EditText
android:layout_width="318dp"
android:layout_height="40dp"
android:layout_marginTop="30dp"
android:layout_gravity="center_horizontal"
android:inputType="textPassword"
android:ems="10"
android:id="#+id/txtPassword"
android:background="#ffffff"
android:hint="#string/password"
android:textColorHint="#color/dim_foreground_material_dark"
android:textColor="#000000" />
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="26dp"
android:layout_marginLeft="26dp"
android:text="#string/reveal_password"
android:id="#+id/chkBox" />
<Button
android:layout_width="180dp"
android:layout_height="wrap_content"
android:text="#string/login"
android:id="#+id/btnLogin"
android:layout_marginTop="90dp"
android:background="#drawable/bkg"
android:textColor="#000066"
android:textSize="25sp"
android:textStyle="bold"
android:layout_gravity="center_horizontal" />
<Button
android:layout_width="180dp"
android:layout_height="wrap_content"
android:text="#string/register"
android:id="#+id/btnRegister"
android:background="#drawable/bkg"
android:layout_marginTop="10dp"
android:textColor="#000066"
android:textSize="25sp"
android:textStyle="bold"
android:layout_gravity="center_horizontal" />
</LinearLayout>
</RelativeLayout>
Please hoping for your feedback Anyway, I am new in android studio.
Anyway, there are two xmls that I did not post I just only pasted the example two those are the registration.xml and splash.xml.
PROBLEM SOLVED: I put a android.intent.category.LAUNCHER instead of just a DEFAULT in every Java class on manifest declaration.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.faacts.jayson.faactsv004">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity android:name=".Splash">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity android:name=".Index">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<activity android:name=".Registration">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>

How do i change activity on a button click android

I have an ImageButton that when I want it to be pressed to launch a second Activity. The second activity is called "Dust 2" as seen in my android manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="pete.smokesapp" >
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".homepage"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Dust2"
android:label="#string/title_activity_dust2" >
</activity>
</application>
</manifest>
I tried following a guide online but got me as far as this stage now my app crashed on launch.
package pete.smokesapp;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
public class homepage extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_homepage);
findViewById(R.id.imgDust2).setOnClickListener((View.OnClickListener) this);
}
public void imgDust2(View view) {
switch (view.getId()){
case R.id.imgDust2:
Toast.makeText(this, "Dust 2 Clicked", Toast.LENGTH_LONG ).show();
break;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_homepage, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
Here is also my main activity, this is the activity with the ImageButton, i am also new to this so sorry if I seem clueless.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity">
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fillViewport="true">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:weightSum="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Maps"
android:id="#+id/txtMaps"
android:layout_weight="0.44" />
<ImageButton
android:layout_width="350dp"
android:layout_height="150dp"
android:id="#+id/imgDust2"
android:clickable="false"
android:src="#drawable/dust2"
android:layout_above="#+id/imgOverpass"
android:layout_alignLeft="#+id/imgOverpass"
android:layout_alignStart="#+id/imgOverpass"
android:layout_marginBottom="10dp" />
<ImageButton
android:layout_width="350dp"
android:layout_height="150dp"
android:id="#+id/imgInferno"
android:layout_below="#+id/txtOverpass"
android:layout_alignLeft="#+id/imgOverpass"
android:layout_alignStart="#+id/imgOverpass"
android:layout_marginBottom="10dp"
android:src="#drawable/inferno" />
<ImageButton
android:layout_width="350dp"
android:layout_height="150dp"
android:id="#+id/imgOverpass"
android:src="#drawable/overpass"
android:layout_marginBottom="10dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
<ImageButton
android:layout_width="350dp"
android:layout_height="150dp"
android:id="#+id/imgMirage"
android:clickable="false"
android:src="#drawable/mirage"
android:layout_above="#+id/imgOverpass"
android:layout_alignLeft="#+id/imgOverpass"
android:layout_alignStart="#+id/imgOverpass"
android:layout_marginBottom="10dp" />
<ImageButton
android:layout_width="350dp"
android:layout_height="150dp"
android:id="#+id/imgCache"
android:clickable="false"
android:src="#drawable/cache"
android:layout_above="#+id/imgOverpass"
android:layout_alignLeft="#+id/imgOverpass"
android:layout_alignStart="#+id/imgOverpass"
android:layout_marginBottom="10dp" />
<ImageButton
android:layout_width="350dp"
android:layout_height="150dp"
android:id="#+id/imgNuke"
android:clickable="false"
android:src="#drawable/nuke"
android:layout_above="#+id/imgOverpass"
android:layout_alignLeft="#+id/imgOverpass"
android:layout_alignStart="#+id/imgOverpass"
android:layout_marginBottom="10dp" />
</LinearLayout>
</ScrollView>
</RelativeLayout>

There are two methods available in android using which you can go from one Activity to another.
1. Use button.setOnClickListener()
Create a button in xml file.
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
Now set event listener for the button in your .class file
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//set the event you want to perform when button is clicked
//you can go to another activity in your app by creating Intent
Intent intent = new Intent(getApplicationContext, Activity2.class);
startActivity(intent);
}
});
2. Use <android:onClick="goNext">
Put the onClick as the attribute of the button you have created in xml file.
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:onClick="goNext" />
Now in your .class file define an event for that button as,
goNext() {
Intent intent = new Intent(getApplicationContext, Activity2.class);
startActivity(intent);
}

In your first activity do this:
Button button = (Button) findViewById(R.id.imgDust2);
button.setOnClickListener(new View.OnClickListener () {
#Override
public void onClick(View v){
Intent intent = new Intent(v.getContext(), dust2.class);
startActivity(intent);
}
});

Try the following:
Add implements OnClickListener to your class definition: public class homepage extends ActionBarActivity implements OnClickListener
An error will appear and ask you to add unimplemented methods. Do so.
Change findViewById(R.id.imgDust2).setOnClickListener((View.OnClickListener) this); to findViewById(R.id.imgDust2).setOnClickListener(this);
Place the stuff you want to do when the button is clicked into the new method that was added in step 2.

Set onClick to the xml imageView and put the name of the method:
<ImageButton
android:layout_width="350dp"
android:layout_height="150dp"
android:id="#+id/imgDust2"
android:clickable="false"
android:src="#drawable/dust2"
android:layout_above="#+id/imgOverpass"
android:layout_alignLeft="#+id/imgOverpass"
android:layout_alignStart="#+id/imgOverpass"
android:layout_marginBottom="10dp"
android:onClick="imgDust2"/>

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