How To Keep A Java Thread Running In Background

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How to run an Android service always in background?

This example demonstrates how do I run an android service always in background.

Footstep i − Create a new project in Android Studio, go to File ⇒ New Projection and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-eight"?> <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"    tools:context=".MainActivity">    <Button       android:id="@+id/button"       android:text="Click here to kickoff background Service"       android:textStyle="bold"       android:textSize="16sp"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_centerInParent="truthful" /> </RelativeLayout>

Step 3 – Right click on the projection, Select New >> Service >> Service and add the following to MyServices.java

package app.com.sample; import android.app.Service; import android.content.Intent; import android.os.IBinder; import android.widget.Toast; public course MyService extends Service {    public MyService() {    }    @Override    public int onStartCommand(Intent intent, int flags, int startId){       onTaskRemoved(intent);       Toast.makeText(getApplicationContext(),"This is a Service running in Background",       Toast.LENGTH_SHORT).show();       return START_STICKY;    }    @Override    public IBinder onBind(Intent intent) {       // TODO: Return the communication aqueduct to the service.       throw new UnsupportedOperationException("Not yet implemented");    }    @Override    public void onTaskRemoved(Intent rootIntent) {       Intent restartServiceIntent = new Intent(getApplicationContext(),this.getClass());       restartServiceIntent.setPackage(getPackageName());       startService(restartServiceIntent);       super.onTaskRemoved(rootIntent);    } }

Step iv − Add the following code to src/MainActivity.java

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 {    Button button;    @Override    protected void onCreate(Packet savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       button = findViewById(R.id.push);       button.setOnClickListener(new View.OnClickListener() {          @Override          public void onClick(View v) {             startService(new Intent(getApplicationContext(),MyService.class));          }       });    } }

Step 5 - Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-viii"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="app.com.sample">    <application       android:allowBackup="true"       android:icon="@mipmap/ic_launcher"       android:label="@string/app_name"       android:roundIcon="@mipmap/ic_launcher_round"       android:supportsRtl="truthful"       android:theme="@style/AppTheme">       <service          android:name=".MyService"          android:enabled="true"          android:exported="true"></service>       <activeness android:name=".MainActivity">          <intent-filter>             <activeness android:proper name="android.intent.action.MAIN" />             <category android:name="android.intent.category.LAUNCHER" />          </intent-filter>       </activeness>    </application> </manifest>

Let's try to run your awarding. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project'due south action files and click Run icon from the toolbar. Select your mobile device as an option and and so check your mobile device which will display your default screen –