First, it has been a while since I've done any Android development and I'm no expert by any means. But what I'm trying to do, I've done before and it worked great; however, it is my understanding that Android updates may have changed how I need to do what I'm trying to do. On to my problem.
I'm working on a project that needs periodic communication with a remote server. In some cases, the work is scheduled and sometimes it is reacting to some event on the phone. In short, I need a background service that operates without bothering the user and will provide notification(s) as necessary. I've written a service, as I know how, I've researched the internet, compared it to what I've done before, and I keep getting the same problem. In any case, I've broken everything down to the simplest of services and the problem still exists.
My Note 9 device is running Android 8.1.0; however, I need broad compatibility. I'm just using this device for testing while trying to keep compatibility in mind. But I can't even get the basic functionality to work.
I've inserted code to ring the phone every so often, from the service. I removed it for simplicity and to make sure that wasn't causing the problem. When I execute the service from the app/activity, everything works fine and the service continues to execute. When I exit the app/activity, the service continues.
When I reboot the phone, the service executes as expected. Over a period of a minute, or so, I get the following notice. Why? What am I doing wrong? What changes have taken place that I need to adjust to?
The following is my code.
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
android:installLocation="internalOnly"
package="com.example.exampleservice">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<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">
<receiver
android:name="com.example.exampleservice.BootReceiver">
<intent-filter android:priority="0">
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<service android:name=".MyService" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
MainActivity.java
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button buttonStart;
private Button buttonStop;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonStart = (Button) findViewById(R.id.buttonStart);
buttonStop = (Button) findViewById(R.id.buttonStop);
buttonStart.setOnClickListener(this);
buttonStop.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (view == buttonStart) {
startService(new Intent(this, MyService.class));
} else if (view == buttonStop) {
stopService(new Intent(this, MyService.class));
}
}
}
BootReceiver.java
public class BootReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent)
{ if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) {
Intent serviceIntent = new Intent(context, MyService.class);
context.startService(serviceIntent);
}
}
}
MyService.java
public class MyService extends Service {
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_STICKY;
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onRebind(Intent intent) {
}
@Override
public boolean onUnbind(Intent intent) {
return true;
}
@Override
public void onDestroy() {
super.onDestroy();
}
}
