How do I add a scrolling listView to a popup in android studio?… here is a solution to the problem.
How do I add a scrolling listView to a popup in android studio?
I’m trying to make an android app that opens a popup when the button is clicked. Also, the pop-up window has four TextViews with headers and four listViews with options. However, I can’t add a listView to the popup. A popup opens when I click the button, but when I add the listView and its adapter and try to run it, the app crashes. I want the layout of the PopUp window to be the same as in the news.xml file.
activity_main.xml
<ScrollView 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:fillViewport="true"
android:visibility="visible"
tools:context=". MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:id="@+id/linear">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/news1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_marginStart="15dp"
android:text="@string/news" />
</RelativeLayout>
</LinearLayout>
</ScrollView>
MainActivity.java
package com.example.abina.popup;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Random;
import static android.view.Gravity.NO_GRAVITY;
public class MainActivity extends AppCompatActivity {
private Button news1;
private PopupWindow popupWindow;
private LayoutInflater layoutInflater;
private LinearLayout linearLayout;
ListView lst;
String [] local = {"asdf","Sgadf","adfhtr","trdbfa"};
@RequiresApi(api = Build.VERSION_CODES. O)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
for listView 1
lst = (ListView) findViewById(R.id.listView1);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android. R.layout.simple_list_item_1,local);
lst.setAdapter(adapter);
lst.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Toast.makeText(MainActivity.this,local[i],Toast.LENGTH_SHORT).show();
}
});
linearLayout = (LinearLayout) findViewById(R.id.linear);
news1 = (Button) findViewById(R.id.news1);
news1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
layoutInflater = (LayoutInflater) getApplication().getSystemService(LAYOUT_INFLATER_SERVICE);
ViewGroup container = (ViewGroup) layoutInflater.inflate(R.layout.news,null);
popupWindow = new PopupWindow(container,800,1300,true);
popupWindow.showAsDropDown(news1);
container.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
popupWindow.dismiss();
return false;
}
});
}
});
}
}
News .xml
<?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:background="#ABEBC6">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true">
<ListView
android:id="@+id/listView1"
android:layout_width="160dp"
android:layout_height="184dp"
android:layout_alignParentStart="true"
android:layout_below="@+id/textView"
android:layout_marginStart="13dp" />
<TextView
android:id="@+id/textView"
android:layout_width="109dp"
android:layout_height="33dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginStart="30dp"
android:layout_marginTop="20dp"
android:text="@string/local" />
<TextView
android:id="@+id/textView2"
android:layout_width="108dp"
android:layout_height="33dp"
android:layout_alignParentEnd="true"
android:layout_alignTop="@+id/textView"
android:layout_marginEnd="30dp"
android:text="@string/national" />
<ListView
android:id="@+id/listView2"
android:layout_width="160dp"
android:layout_height="184dp"
android:layout_alignParentEnd="true"
android:layout_alignTop="@+id/listView1" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="260dp">
<TextView
android:id="@+id/textView3"
android:layout_width="109dp"
android:layout_height="33dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginStart="30dp"
android:layout_marginTop="20dp"
android:text="@string/sports1" />
<TextView
android:id="@+id/textView4"
android:layout_width="108dp"
android:layout_height="33dp"
android:layout_alignParentEnd="true"
android:layout_alignTop="@+id/textView3"
android:layout_marginEnd="43dp"
android:text="@string/sports2" />
<ListView
android:id="@+id/listView3"
android:layout_width="160dp"
android:layout_height="184dp"
android:layout_alignParentStart="true"
android:layout_below="@+id/textView3"
android:layout_marginStart="20dp" />
<ListView
android:id="@+id/listView4"
android:layout_width="162dp"
android:layout_height="184dp"
android:layout_alignParentEnd="true"
android:layout_below="@+id/textView4" />
</RelativeLayout>
</RelativeLayout>
strings.xml
<resources>
<string name="app_name">Popup</string>
<string name="news">Check Latest News!</string>
<string name="local">Local News</string>
<string name="national">National News</string>
<string name="sports1">Sports One</string>
<string name="sports2">Sports Two</string>
<string-array name="local">
<item>Star Ledger</item>
<item>Ny Times</item>
<item>The Record</item>
<item>Trentorian</item>
</string-array>
</resources>
Solution
The problem is that your list doesn’t exist in your activity_main layout. Instead, it exists in the pop-up window.
Follow the code below to change your onCreate() method and it should work.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
for listView 1
linearLayout = (LinearLayout) findViewById(R.id.linear);
news1 = (Button) findViewById(R.id.news1);
news1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
layoutInflater = (LayoutInflater) getApplication().getSystemService(LAYOUT_INFLATER_SERVICE);
ViewGroup container = (ViewGroup) layoutInflater.inflate(R.layout.news,null);
popupWindow = new PopupWindow(container,800,1300,true);
lst = container.findViewById(R.id.listView1);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this,android. R.layout.simple_list_item_1,local);
lst.setAdapter(adapter);
lst.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Toast.makeText(MainActivity.this,local[i],Toast.LENGTH_SHORT).show();
}
});
popupWindow.showAsDropDown(news1);
container.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
popupWindow.dismiss();
return false;
}
});
}
});
}
Hope this helps.
Best regards,