Android | Run command programmatically

Question

I would like to create a (test) app that executes a command every hour in the background (for example, edit a file or show a debug message).

Assuming that the app starts with system boot

• How can I do this?
• The app must remain running always?

Answer 1

Please use alarmmanager using service functionality to achieve this.

for eg:

private void setAlarmManager() {
    Intent intent = new Intent(this, AlarmReceiver.class);
    PendingIntent sender = PendingIntent.getBroadcast(this, 2, intent, 0);
    AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
    long l = new Date().getTime();
    if (l < new Date().getTime()) {
        l += 86400000; // start at next 24 hour
    }
    am.setRepeating(AlarmManager.RTC_WAKEUP, l, 86400000, sender); // 86400000
}

Source

Answer 2

To Make your app start up when the devices boot completes You have to create a Class that extends Receiver. In the manifest Declare your class like this

<receiver android:name=".ClassName">
<intent-filter >
    <action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>

And don't forget to use the permission

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

Write the following to your Receiver class, onReceive Override method

Intent intent= new Intent(context, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(myIntent);

If you want to Run something in your background use Services