AndroidManifest.xml:
MyService.java: Create MyService.java file. Service's don't have its own layout. Hence no XML file required.
MainActivity.java:
activity_main.xml:
Output:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.servicedemo"> <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> <service android:name=".MyService" /> </application> </manifest>
MyService.java: Create MyService.java file. Service's don't have its own layout. Hence no XML file required.
package com.example.servicedemo; import android.app.Service; import android.content.Intent; import android.os.Handler; import android.os.IBinder; import android.util.Log; import android.widget.Toast; import androidx.annotation.Nullable; public class MyService extends Service { private Handler handler; private Runner runner; @Nullable @Override public IBinder onBind(Intent intent) { return null; } public void onCreate() { super.onCreate(); Toast.makeText(this, "Service Started", Toast.LENGTH_LONG).show(); handler = new Handler(); runner = new Runner(); } public int onStartCommand(Intent intent, int id, int startID) { handler.post(runner); return START_STICKY; } @Override public void onDestroy() { super.onDestroy(); handler.removeCallbacks(runner); Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show(); } public class Runner implements Runnable { @Override public void run() { Log.d("AndroidClarified", "Running"); handler.postDelayed(this, 1000 * 5); } } }
MainActivity.java:
package com.example.servicedemo; 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 implements View.OnClickListener { private Button startButton, stopButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); startButton = findViewById(R.id.start_button); stopButton = findViewById(R.id.stop_button); startButton.setOnClickListener(this); stopButton.setOnClickListener(this); } @Override public void onClick(View v) { Intent intent = new Intent(this, MyService.class); switch (v.getId()) { case R.id.start_button: startService(intent); break; case R.id.stop_button: stopService(intent); break; } } }
activity_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"> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:orientation="horizontal"> <Button android:id="@+id/start_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="20dp" android:text="Start Service" /> <Button android:id="@+id/stop_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="20dp" android:text="Stop Service" /> </LinearLayout> </RelativeLayout>
Output: