Can't pass data from second Activity to main

Can't pass data from second Activity to main - java

I am having a trouble in passing data between Activity2 and ActivityMain.
I have ActivityMain with a "Add Person" button. When I press this button, I go to Activity2, after that I fill field Name and press button "Add", but can't to add Name on my ActivityMain.
ActivityMain.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:orientation="vertical"
android:padding="5dp"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Add Person"
android:onClick="addPerson"
/>
</LinearLayout>
</android.support.constraint.ConstraintLayout>
ActivityMain.java
package com.example.test.zadanie01;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data){
Intent intent = getIntent();
String message = intent.getStringExtra(PersonActivity.EXTRA_MESSAGE);
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
setContentView(textView);
}
public void addPerson(View view){
Intent intent = new Intent(this, PersonActivity.class);
startActivityForResult(intent, 1);
}
}
Activity2.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:orientation="vertical"
android:padding="5dp"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Name"
android:id="#+id/send_name"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Add Person"
android:onClick="addPersonToMain"
/>
</LinearLayout>
</android.support.constraint.ConstraintLayout>
Activity2.java
package com.example.test.zadanie01;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import static android.provider.AlarmClock.EXTRA_MESSAGE;
public class PersonActivity extends AppCompatActivity {
public final static String EXTRA_MESSAGE = "EXTRA_MESSAGE";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_person);
}
public void addPersonToMain(View view){
Intent returnintent = new Intent(this, MainActivity.class);
EditText SendName = (EditText) findViewById(R.id.send_name);
String message = SendName.getText().toString();
returnintent.putExtra(EXTRA_MESSAGE, message);
setResult(RESULT_OK, returnintent);
finish();
}
}

try to replace
String message = intent.getStringExtra(PersonActivity.EXTRA_MESSAGE);
with
String message = data.getStringExtra(PersonActivity.EXTRA_MESSAGE);

Change this part of your code.
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if (requestCode == 1){
if (resultCode == RESULT_OK){
String message = data.getStringExtra(PersonActivity.EXTRA_MESSAGE);
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
setContentView(textView);
}
}
}
You don't need to create another Intent in onActivityResult, the Intent is already delivered by the method: Intent data. Then use data as your intent. And before all, check if it is the requestCode you asked and if the result is OK.
EDIT
Answering another part of the question from the comments.
1 - Add a TextView to your activity_main.xml and set its visibility to gone by default.
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:orientation="vertical"
android:padding="5dp"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/text_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="40sp"
android:visibility="gone" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Add Person"
android:onClick="addPerson"
/>
</LinearLayout>
</android.support.constraint.ConstraintLayout>
2 - When retrieveng the data message, show the TextView and display the content.
protected void onActivityResult(int requestCode, int resultCode, Intent data){
if (requestCode == 1){
if (resultCode == RESULT_OK){
String message = data.getStringExtra(PersonActivity.EXTRA_MESSAGE);
TextView textView = findViewById(R.id.text_message);
textView.setVisibility(View.VISIBLE);
textView.setText(message);
}
}
}

Related

'startActivityForResult(android.content.Intent, int)' is deprecated <<Java>>

how to solve this problem
'startActivityForResult(android.content.Intent, int)' is deprecated
here is for my MainActivity.java
`
package com.example.praktikump10;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button btnMoveActivity;
private Button btnMoveWithDataActivity;
private Button btnDialPhone;
private Button btnMoveWithObject;
private Button btnMoveForResult;
private TextView tvResult;
private int REQUEST_CODE = 100;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnMoveActivity = (Button) findViewById(R.id.btn_move_activity);
btnMoveActivity.setOnClickListener(this);
btnMoveWithDataActivity = (Button) findViewById(R.id.btn_move_activity_data);
btnMoveWithDataActivity.setOnClickListener(this);
btnDialPhone = (Button) findViewById(R.id.btn_dial_number);
btnDialPhone.setOnClickListener(this);
btnMoveWithObject = (Button) findViewById(R.id.btn_move_activity_object);
btnMoveWithObject.setOnClickListener(this);
btnMoveForResult = (Button) findViewById(R.id.btn_move_for_result);
btnMoveForResult.setOnClickListener(this);
tvResult = (TextView) findViewById(R.id.tv_result);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_move_activity:
Intent moveIntent = new Intent(MainActivity.this, MoveActivity.class);
startActivity(moveIntent);
break;
case R.id.btn_move_activity_data:
Intent moveWithDataIntent = new Intent(MainActivity.this, MoveWithDataActivity.class);
moveWithDataIntent.putExtra(MoveWithDataActivity.EXTRA_NAME, "Hafidz Izdihar Muslim\n");
moveWithDataIntent.putExtra(MoveWithDataActivity.EXTRA_AGE, 20);
startActivity(moveWithDataIntent);
break;
case R.id.btn_dial_number:
String phoneNumber = "087878336770";
Intent dialPhoneIntent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + phoneNumber));
startActivity(dialPhoneIntent);
break;
case R.id.btn_move_activity_object:
Person mPerson = new Person();
mPerson.setName("DicodingAcademy");
mPerson.setAge(5);
mPerson.setEmail("academy#dicoding.com");
mPerson.setCity("Bandung");
Intent moveWithObjectIntent = new Intent(MainActivity.this, MoveWithObjectActivity.class);
moveWithObjectIntent.putExtra(MoveWithObjectActivity.EXTRA_PERSON, mPerson);
startActivity(moveWithObjectIntent);
break;
case R.id.btn_move_for_result:
Intent moveForResultIntent = new Intent(MainActivity.this, MoveForResultActivity.class);
startActivityForResult(moveForResultIntent, REQUEST_CODE);
break;
}
}
protected void onActivityResult ( int requestCode, int resultCode, Intent data){
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE) {
if (resultCode == MoveForResultActivity.RESULT_CODE) {
int selectedValue = data.getIntExtra(MoveForResultActivity.EXTRA_SELECTED_VALUE, 0);
tvResult.setText("Hasil : " + selectedValue);
}
}
}
}
`
and this is my activity_main.xml
`
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.example.praktikump10.MainActivity">
<Button
android:id="#+id/btn_move_activity"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="Pindah Activity" />
<Button
android:id="#+id/btn_move_activity_data"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="Pindah Activity Dengan Data" />
<Button
android:id="#+id/btn_dial_number"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="Dial a Number" />
<Button
android:id="#+id/btn_move_activity_object"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="Pindah Activity dengan Object" />
<Button
android:id="#+id/btn_move_for_result"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="Pindah Activity untuk Result" />
<TextView
android:id="#+id/tv_result"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Hasil"
android:textSize="24sp" />
</LinearLayout>
`
this is for my MoveForResultActivity.java
`
package com.example.praktikump10;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioGroup;
import androidx.appcompat.app.AppCompatActivity;
import com.example.praktikump10.R;
public class MoveForResultActivity extends AppCompatActivity
implements View.OnClickListener {
private Button btnChoose;
private RadioGroup rgNumber;
public static String EXTRA_SELECTED_VALUE = "extra_selected_value";
public static int RESULT_CODE = 110;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_move_for_result);
btnChoose = (Button) findViewById(R.id.btn_choose);
btnChoose.setOnClickListener(this);
rgNumber = (RadioGroup) findViewById(R.id.rg_number);
}
#Override
public void onClick(View v) {
if (v.getId() == R.id.btn_choose) {
if (rgNumber.getCheckedRadioButtonId() != 0) {
int value = 0;
switch (rgNumber.getCheckedRadioButtonId()) {
case R.id.rb_50:
value = 50;
break;
case R.id.rb_100:
value = 100;
break;
case R.id.rb_150:
value = 150;
break;
case R.id.rb_200:
value = 200;
break;
}
Intent resultIntent = new Intent();
resultIntent.putExtra(EXTRA_SELECTED_VALUE, value);
setResult(RESULT_CODE, resultIntent);
finish();
}
}
}
}
`
activity_move_for_result.xml
`
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.example.praktikump10.MoveForResultActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="Pilih angka yang kamu suka" />
<RadioGroup
android:id="#+id/rg_number"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<RadioButton
android:id="#+id/rb_50"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="50" />
<RadioButton
android:id="#+id/rb_100"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="100" />
<RadioButton
android:id="#+id/rb_150"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="150" />
<RadioButton
android:id="#+id/rb_200"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/activity_vertical_margin"
android:text="200" />
</RadioGroup>
<Button
android:id="#+id/btn_choose"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Pilih" />
</LinearLayout>
`
why the
'startActivityForResult(android.content.Intent, int)' is deprecated
on MainActivity.java
any answer i really appreciated
thank you for the valueable answer...

Error message: java.lang.IllegalArgumentException

I'm new at coding so I might be not very good at explaining. I'm trying to build chat app with Firebase.
Here is my code for Main activity:
Mpackage com.example.otto.myfirstapplication;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.text.format.DateFormat;
import com.firebase.ui.auth.AuthUI;
import com.firebase.ui.database.FirebaseListAdapter;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.FirebaseDatabase;
public class MainActivity extends AppCompatActivity {
private static int SIGN_IN_REQUEST_CODE = 1;
private FirebaseListAdapter<ChatClass> adapter;
RelativeLayout activity_main;
FloatingActionButton fab;
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == R.id.menu_sign_out)
{
AuthUI.getInstance().signOut(this).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
Snackbar.make(activity_main,"You have been signed out.", Snackbar.LENGTH_SHORT).show();
finish();
}
});
}
return true;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu,menu);
return true;
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == SIGN_IN_REQUEST_CODE)
{
if(resultCode == RESULT_OK)
{
Snackbar.make(activity_main,"Successfully sighned in.Welcome!", Snackbar.LENGTH_SHORT).show();
displayChatMessage();
}
else{
Snackbar.make(activity_main,"Error 1", Snackbar.LENGTH_SHORT).show();
finish();
}
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fab = (FloatingActionButton)findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
EditText input = (EditText)findViewById(R.id.input);
FirebaseDatabase.getInstance().getReference().push().setValue(new ChatClass(input.getText().toString(),FirebaseAuth.getInstance().getCurrentUser().getEmail()));
input.setText("");
}
});
if(FirebaseAuth.getInstance().getCurrentUser() == null)
{
startActivityForResult(AuthUI.getInstance().createSignInIntentBuilder().build(),SIGN_IN_REQUEST_CODE);
}
else
{
Snackbar.make(activity_main,"Welcome " +FirebaseAuth.getInstance().getCurrentUser().getEmail(),Snackbar.LENGTH_SHORT).show();
}
displayChatMessage();
}
private void displayChatMessage() {
ListView listOfMessage = (ListView)findViewById(R.id.list_of_message);
adapter = new FirebaseListAdapter<ChatClass>(this,ChatClass.class,R.layout.list_item,FirebaseDatabase.getInstance().getReference()) {
#Override
protected void populateView(View v, ChatClass model, int position) {
TextView messageText,messageUser,messageTime;
messageText = (TextView)findViewById(R.id.message_text);
messageUser = (TextView)findViewById(R.id.message_user);
messageTime = (TextView)findViewById(R.id.message_time);
messageText.setText(model.getMessageText());
messageUser.setText(model.getMessageUser());
messageTime.setText(DateFormat.format("dd-mm-yy (HH:mm:ss)",model.getMessageTime()));
}
};
listOfMessage.setAdapter(adapter);
}
}
And code for acitivty_main.xml:
<?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">
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:src="#drawable/c_send"
android:id="#+id/fab"
android:tint="#android:color/white"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
app:fabSize="mini"
/>
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/fab"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Message..."
android:id="#+id/input"
/>
</android.support.design.widget.TextInputLayout>
<ListView
android:id="#+id/list_of_message"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_above="#+id/fab"
android:dividerHeight="16dp"
android:divider="#android:color/transparent"
android:layout_marginBottom="16dp"
android:layout_width="match_parent"
android:layout_height="match_parent">
</ListView>
Error code from the logcat while app says that it keeps stopping tells me that problem is in the snackbar:
Caused by: java.lang.IllegalArgumentException: No suitable parent found from the given view. Please provide a valid view.
at android.support.design.widget.Snackbar.make(Snackbar.java:181)
at com.example.otto.myfirstapplication.MainActivity.onCreate(MainActivity.java:97)
at android.app.Activity.performCreate(Activity.java:7009)
at android.app.Activity.performCreate(Activity.java:7000)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
I updated all dependencies to the latest versions. I was thinking maybe I have to downgrade to solve a problem but I'm not sure.
Anyway I'm super stuck and hope you can help me. Thanks in advance.

Change at all places,
Snackbar.make(activity_main,...
to
Snackbar.make(findViewById(android.R.id.content),...
Cause
You did not initialize activity_main. So it is null when you use it. findViewById(android.R.id.content) gives you root view of current Activity.

First of All you have to create coordinator layout to appear your snackbar. so change your main relativelayout to coordinator layout .
<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:id="#+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
//YOUR CURRENT CODE
</android.support.design.widget.CoordinatorLayout>
after that in your activity .
coordinatorLayout = (CoordinatorLayout) findViewById(R.id
.coordinatorLayout);
and make your Snackbar layout like this
Snackbar snackbar = Snackbar.make(coordinatorLayout, "Welcome to AndroidHive", Snackbar.LENGTH_LONG);
snackbar.show();

As in your code,
RelativeLayout activity_main;
you haven't initialized the activity_main, use findviewbyid in onCreate of activity
In xml change the below code, add the id in xml.
<?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"
android:id="#+id/container"
tools:context=".MainActivity">
and in the code fetch the id in onCreate method of Activity:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
activity_main=findViewById(R.id.container);
}
and now use this view(activity_main) in snack bar.

onCreate() is not called

This is the code I am using
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
showVoiceText.setText("I am working");
}
However it seems not to be called... It never displays "I am working"
This is my xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.phoenix.coreai.HomeActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Core A.I."
android:id="#+id/showVoiceOutput"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Enable voice control"
tools:layout_editor_absoluteX="88dp"
tools:layout_editor_absoluteY="167dp" />
</android.support.constraint.ConstraintLayout>
This is not my main activity, my main activity is just an intro playing a small mp4 file
This is the main activity code
package com.example.phoenix.coreai;
import android.content.Intent;
import android.net.Uri;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.VideoView;
public class MainActivity extends AppCompatActivity {
VideoView view;
private static int SPLASH_TIME_OUT = 2700;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
view = (VideoView) findViewById(R.id.videoView);
videoPlay(view);
new Handler().postDelayed(new Runnable(){
#Override
public void run(){
Intent homeIntent = new Intent(MainActivity.this, HomeActivity.class);
startActivity(homeIntent);
finish();
}
},SPLASH_TIME_OUT);
}
public void videoPlay(View v){
String videoPath = "android.resource://com.example.phoenix.coreai/" + R.raw.spashscreen;
Uri uri = Uri.parse(videoPath);
view.setVideoURI(uri);
view.start();
}
}
and this is the xml of the main activity
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:background="#000000"
tools:context="com.example.phoenix.coreai.MainActivity">
<VideoView
android:id="#+id/videoView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_marginTop="-27dp"
app:layout_constraintTop_toTopOf="parent"
tools:layout_editor_absoluteX="0dp">
</VideoView>
</LinearLayout>
I cannot debug the application through my mobile it has a custom rom and android studio wont recognize it
Let's assume that I would like to call this void from onCreate
private void musicScan(){
File f = new File(path);
File file[] = f.listFiles();
fileArray = new String[file.length];
for (int i = 0; i < file.length; ++i){
fileArray[i] = file[i].getName();
}
}
It does not seem to execute the void that I am calling

#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
TextView showVoiceText = (TextView) findViewById(R.id.showVoiceOutput);
showVoiceText.setText("I am working");
}
[maybe you need to remove the first "TextView" if it is already declared in another place, but since we don't have the whole code...]
But still will be good to know how your main activity start/call this activity

I think the problem is that you declared a global TextView and called it showVoiceText but you never initialise it
the solution is to initialise it after the setContentView like the following:
showVoiceText=(TextView) findViewById(R.id.showVoiceOutput);

Why app crashes if user enter a simple text eg "hi"

Source are :
MainActivity.java-
package com.amostrone.akash.safebrowser;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
public final static String EXTRA_MESSAGE = "com.amostrone.akash.safebrowser.MESSAGE";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void search(View view) {
Intent intent = new Intent(this, Browser.class);
EditText editText = (EditText) findViewById(R.id.editText);
String message = editText.getText().toString();
if(message == null || message.trim().equals("")) {
Toast.makeText(this, "No Input", Toast.LENGTH_SHORT).show();
message = "http://www.android.com"; // TODO Add your own WEBSITE
}
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
}
MainActivity.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:id="#+id/activity_main"
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="com.amostrone.akash.safebrowser.MainActivity">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textWebEmailAddress"
android:ems="10"
android:id="#+id/editText"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:hint="Search here." />
<Button
android:text="#string/search"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:id="#+id/button"
android:onClick="search" />
</RelativeLayout>
Browser.java
package com.amostrone.akash.safebrowser;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class Browser extends AppCompatActivity {
static String message;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_browser);
Intent intent = getIntent();
message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
if (!((message.substring(0, 11)).equals("http://www.") || (message.substring(0, 12)).equals("https://www.")))
check();
WebView myWebView = (WebView) findViewById(R.id.webview);
myWebView.setWebViewClient(new WebViewClient());
myWebView.loadUrl(message);
}
void check() {
// WWW
if(message.substring(0,4).equals("www."))
{
message = "http://" + message;
return;
}
// Google Search
message = "https://www.google.co.in/search?q=" + message + "&rct=j" ;
}
}
Browser.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:id="#+id/activity_browser"
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="com.amostrone.akash.safebrowser.Browser">
<WebView
android:id="#+id/webview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true" />
</RelativeLayout>
So my problem is that when i enter any text like "http://www.google.con.in" or just "www.google.co.in", everything works fine but when i enter just simple text like "stackoverflow" app crashes.It crashes even before system call the button "search" function "search(View view)".
Please help--

The problem may be that you are executing a substring on your message String, but it's too short.
As example:
message.substring(0, 11)
This will do a substring from index zero to 11, but what happens if the string have only a length of 4? There will be a exception.
You should extract the checks into an new method and do the length checks on the string before calling the substring method.
if(message.length() > 10){
message.substring(0,11);
}

Android checkBox onClick app doesn't work, stops unexpectedly?

So,
I am building a basic app which has 2 activivities. Now, the first one works well, the second one does not. It does not show any errors while I edit the codes, but when I run the app and when I am in the second acitivity it gives me an annoying error. Saying "Stops unexpectedly...." You know. I tried debugging but failed. In the second activity called Troll.java I should be able to check a checkbox and when I do that a text is supposed to change to something else. It says stops unexpe.....
main.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:padding="0dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
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" >
<include
android:layout_centerInParent="true"
android:layout_width="match_parent"
android:layout_height="match_parent"
layout="#layout/resuable_pizza_layout" />
<TextView
android:id="#+id/display"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="105dp"
android:text="#string/display"
android:textColor="#FFFFFF"
android:textSize="18sp" />
<ImageView
android:id="#+id/lol"
android:onClick="onlol"
android:contentDescription="#string/lol2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/display"
android:layout_centerHorizontal="true"
android:layout_marginTop="66dp"
android:src="#drawable/lol" />
troll.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FF69B4"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center" >
<CheckBox
android:id="#+id/box1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onChecked1"
android:text="#string/ch1"
android:textColor="#000000" />
<CheckBox
android:id="#+id/box2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onChecked2"
android:text="#string/ch2"
android:textColor="#000000" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:gravity="center"
android:layout_weight="0.26" >
<TextView
android:id="#+id/textView1"
android:textColor="#000000"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/trollFace"
android:textAppearance="?android:attr/textAppearanceLarge" />
</LinearLayout>
</LinearLayout>
mainActitvity.java :
package com.example.pizza2;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.CheckBox;
import android.widget.TextView;
public class MainActivity extends Activity {
CheckBox pepp, cheese;
TextView tv;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
pepp = (CheckBox) findViewById(R.id.check1);
cheese = (CheckBox) findViewById(R.id.check2);
tv = (TextView) findViewById(R.id.display);
}
public void onShow(View view){
StringBuilder str = new StringBuilder();
if (pepp.isChecked() && cheese.isChecked()){
str.append("Pepperoni, extra cheese pizza!");
}
else if (pepp.isChecked()){
str.append("Pepperoni pizza!");
}
else if (cheese.isChecked()){
str.append("Extra cheese pizza!");
}
tv.setText(str);
}
public void onlol(View view){
Intent intent = new Intent(this, Troll.class);
startActivity(intent);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Troll.java:
package com.example.pizza2;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.TextView;
public class Troll extends Activity{
CheckBox box11, box22;
TextView tv;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.troll);
box11 = (CheckBox) findViewById(R.id.box1);
box22 = (CheckBox) findViewById(R.id.box2);
tv = (TextView) findViewById(R.id.display);
}
public void onChecked1(View view){
StringBuilder str = new StringBuilder();
if(box11.isChecked()){
str.append("Lol bro!");
}
tv.setText(str);
}//end of "onChecked1"
public void onChecked2(View view){
StringBuilder str = new StringBuilder();
if(box22.isChecked()){
str.append("XD XD Kaki");
}
tv.setText(str);
} //end of "onChecked2"
}

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

Can't pass data from second Activity to main - java

try to replace String message = intent.getStringExtra(PersonActivity.EXTRA_MESSAGE); with String message = data.getStringExtra(PersonActivity.EXTRA_MESSAGE);

Related

'startActivityForResult(android.content.Intent, int)' is deprecated <<Java>>

Error message: java.lang.IllegalArgumentException

onCreate() is not called

Why app crashes if user enter a simple text eg "hi"

Android checkBox onClick app doesn't work, stops unexpectedly?

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