I am an android beginner, just learning android static fragment concept, but after running my code getting app crash issue. Here is details:
MainActivity.java
package com.example.lalendrakumar.fragmentdemo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
activity_main.xml
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:weightSum="2">
<fragment
android:id="#+id/fragment1"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_weight="1" />
<fragment
android:id="#+id/fragment2"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_weight="1" />
So anyone can solve my problem.
I'm assuming you want the two fragments to fill the page. "fill_parent" has been replaced now by "match_parent." However, if you use this, in theory, the two fragments will overlap one over the other.
To split them in the screen, each will have to be adjusted to height zero. This is how each fragment's dimensions should read
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
You don't mentioned which layout you are using, but i assume you are using LinearLayout. LinearLayout take orientation horizontal by default, and you gave height and width to match_parent(fill_parent is deprecated now and replaced by match_parent)
Please find more information about LinearLayout on this link
Replace your code with following
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:weightSum="2">
<fragment
android:id="#+id/fragment1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" />
<fragment
android:id="#+id/fragment2"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" />
try commenting out these lines in fragment class (if they are present )
/* #Override
public void onAttach(Context context) {
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
*/
Related
I am a beginner to android. I want to slide a slidebar in a horizontal linear layout but when I run the code, the application ends giving error FallingBall keeps stopping
My xml:
<?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"
tools:context=".MainActivity">
<LinearLayout
android:id="#+id/linearLayout2"
android:layout_width="0dp"
android:layout_height="0dp"
android:orientation="vertical"
android:weightSum="100"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:id="#+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="72"
android:orientation="horizontal" >
<TextView
android:id="#+id/textView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Hello" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="8"
android:orientation="horizontal">
<ImageView
android:id="#+id/slideBar"
android:layout_width="100dp"
android:layout_height="match_parent"
app:srcCompat="#android:drawable/bottom_bar" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="20"
android:orientation="horizontal">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageButton
android:id="#+id/leftBut"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#android:color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/left_but"
android:onClick="hitLeft"/>
<ImageButton
android:id="#+id/rightBut"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#android:color/white"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/right_but"
android:onClick="hitRight"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
My java file is like this:
package com.example.fallingball;
import androidx.appcompat.app.AppCompatActivity;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity {
ImageView s = findViewById(R.id.slideBar);
float x = s.getX();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
void hitLeft(View view){
x--;
s.setX(30);
}
void hitRight(View view){
x++;
s.setX(40);
}
}
Note: leftBut and rightBut are two Image button and I have copied the images to the drawable folder so if you are trying this code on your system, make sure you adjust this else it will show you Image not found or so...
In MainActivity.java you should initialize your value into onCreate() method
ImageView s;
float x;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
s = findViewById(R.id.slideBar);
x = s.getX();
}
Well, I found my own mistake. The thing what hossein answered earlier was right but the application was still crashing. Actually the problem was coming that I was triggering the methods hitLeft and hitRight which were not initialized as public. That was the mistake and now it is working alright...
I just included an options menu in my app, but in one of my activities it seems to create a white empty space- can anyone tell me why??
It work in other activities in the same app, but not this single activity.
I Hope anyone can help :-)
public class GifsActivity extends OptionsMenu {
private Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_gifs);
toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ImageView gifImageView = (ImageView) findViewById(R.id.iv_gif);
Glide.with(this)
.load("http://i.imgur.com/Vth6CBz.gif")
.asBitmap()
.placeholder(R.drawable.ic_cloud_off_red)
.error(R.drawable.ic_cloud_off_red)
.into(gifImageView);
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools"
android:gravity="center_vertical"
android:orientation="vertical"
tools:context="com.example.examand1.GifsActivity">
<include layout="#layout/toolbar_layout"
/>
<ImageView
android:id="#+id/iv_gif"
android:layout_width="match_parent"
android:layout_height="220dp" />
</RelativeLayout>
Picture of the activity
Remove android:gravity="center_vertical" from your layout. Then your layout will be as below:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<include
android:id="#+id/include"
layout="#layout/toolbar_layout"
android:layout_height="wrap_content"
android:layout_width="match_parent"/>
<ImageView
android:layout_below="#id/include"
android:id="#+id/iv_gif"
android:layout_width="match_parent"
android:layout_height="220dp" />
</RelativeLayout>
I have a problem with implementing a refresh layout. It is covering everything.
I don't know what is the problem, but I tried changing from fragment just to activity, didn't help
here is my code:
<androidx.coordinatorlayout.widget.CoordinatorLayout
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"
tools:context=".MainActivity"
android:background="#color/background">
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/background">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/topheadelines"
android:textColor="#color/colorTextTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="Top Headlines"
android:fontFamily="sans-serif-light"
android:textSize="17sp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="10dp"
android:visibility="invisible"/>
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</androidx.recyclerview.widget.RecyclerView>
</LinearLayout>
</androidx.core.widget.NestedScrollView>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Also, I did think that there was a problem with a toolbar and put an actionbar instead( didn't help)
UPDATE:
It is my function for the swiperefresh layout, just in case:
#Override
public void onRefresh() {
LoadJson("");
}
private void OnLoadingSwipeRefresh(final String keyword){
swipeRefreshLayout.post(
new Runnable() {
#Override
public void run() {
LoadJson(keyword);
}
}
);
}
I found my error. It wasn't in my layout. It was in the code of the adapter.
#Override
public int getItemCount() {
return articles.size();
}
return 0; is set by default and it was my error.
I know it is stupid but it is just in case if someone like me skips that error and not going to know why.
I am using JakeWharton's ViewPagerIndicator on my landscape app but I think I am messing up with the layout. The ViewPagerIndicator does not show up. I just started learning Android Development so any help is appreciated!
My guess is that it has to do with my Linear Layout...should it be relative? Am I covering up the pager indicator? I know that if I move the indicator code above the view pager, I see the indicator but everything else is white. My fragment's layout is a relative layout with height and width matching the parent.
My app is an activity with fragments.
Edit: I set the indicator height to wrap content but now it floats on the top of the screen. How do I make it go down?
My_Activity.java
public class MyActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
ViewPager pager = (ViewPager) findViewById(R.id.viewPager);
MyPagerAdapter mAdapter = new MyPagerAdapter(getSupportFragmentManager());
pager.setAdapter(mAdapter);
CirclePageIndicator circleInd = (CirclePageIndicator) findViewById(R.id.circles);
circleInd.setViewPager(pager);
circleInd.setStrokeColor(0xAA000000);
//circleInd.setCurrentItem(mAdapter.getCount() - 1);
}
private class MyPagerAdapter extends FragmentPagerAdapter {
public MyPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int pos) {
switch (pos) {
case 0: return FirstFragment.newInstance("First");
case 1: return SecondFragment.newInstance("Second");
default: return FirstFragment.newInstance("First");
}
}
#Override
public int getCount() {
return 2;
}
}
}
and the 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"
tools:context="com.example.frontrowqa.myfirstapplication.MyActivity">
<android.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v4.view.ViewPager>
<com.viewpagerindicator.CirclePageIndicator
android:id="#+id/circles"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:padding="10dp"
android:layout_gravity="bottom" />
</LinearLayout>
And my fragment
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp">
<EditText
android:id="#+id/PasscodeText"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:layout_width="fill_parent"
android:hint="Passcode"
android:backgroundTint="#android:color/black" />
<EditText
android:id="#+id/ipAddressText"
android:layout_below="#id/PasscodeText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="IP Address"
android:backgroundTint="#android:color/black" />
<EditText
android:id="#+id/intercomText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/ipAddressText"
android:hint="Intercom Event Number"
android:backgroundTint="#android:color/black"/>
<TextView
android:id="#+id/tvFragFirst"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:textSize="26dp"
android:text="TextView" />
</RelativeLayout>
Set your activity xml like this:
<?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.support.v4.view.ViewPager
android:id="#+id/viewPager"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<com.viewpagerindicator.CirclePageIndicator
android:id="#+id/circles"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:padding="10dp" />
</LinearLayout>
Currently I am showing Google Map in Android phone using Java on the whole screen which is working fine for me.
public class MainActivity extends MapActivity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
}
Below is my XML file-
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<com.google.android.maps.MapView
android:id="#+id/mapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:enabled="true"
android:clickable="true"
android:apiKey="0vAX8Xe9xjo5gkFNEEIH7KdHkNZNJWNnsjUPKkQ"
/>
</RelativeLayout>
Problem Statement:-
I need to show the Google Map on the Top Half of the Android Screen instead of showing on the full screen. And on the Bottom Half of the Screen I need to show TextBox. Is it possible to do this?
Any thoughts will be appreciated.
Yeah its possible and can easily be implemented with LinearLayout. By assigning weight to MapView and TextView.
In this case
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<com.google.android.maps.MapView
android:id="#+id/mapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:apiKey="0vAX8Xe9xjo5gkFNEEIH7KdHkNZNJWNnsjUPKkQ"
android:clickable="true"
android:enabled="true" />
<TextView
android:id="#+id/textView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="TextView" />
</LinearLayout>