CODEWITHSUNDEEP
android
Rakeeb Rajbhandari
Rakeeb Rajbhandari

Reputation: 5063

Android Power Button Pressed

I am trying to create an application that could respond when the power button is pressed. To be more specific, which would respond to it when pressed 2 or 3 times.

For now, I tried the following:

public class SMSKey extends BroadcastReceiver{

    static int countPowerOff = 0;
    private Activity activity = null;
    public SMSKey(Activity activity){
        this.activity = activity;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub

        if(intent.getAction().equals(Intent.ACTION_SCREEN_OFF)){
            countPowerOff++;
        }else if(intent.getAction().equals(Intent.ACTION_SCREEN_ON)){
            if(countPowerOff == 2){
                Intent i = new Intent(activity, SMSOptions.class);
                activity.startActivity(i);
            }
        }
    }

}

and in my manifest:

<receiver android:name=".SMSKey">
        <intent-filter >
            <action android:name="android.intent.action.SCREEN_OFF"/>
            <action android:name="android.intent.action.SCREEN_ON"/>
            <action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
            <action android:name="android.intent.action.ACTION_POWER_DISCONNECTED"/>
            <action android:name="android.intent.action.ACTION_SHUTDOWN"/>
        </intent-filter>
    </receiver>

finally in my MainActivty.java:

IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
SMSKey mReceiver = new SMSKey(this);
registerReceiver(mReceiver, filter);

Even though this works, it only works for the 1st time, it won't work on the 2nd or 3rd attempt when the power button is pressed. Why is that so ??

And another question: as you can see, I am using this KeyPress event in my MainActivity, which means the application is to be open all the time. Is there any other way that I can implement this without getting into the MainActivity.

Upvotes: 1

Views: 3310

Answers (2)

Ivan
Ivan

Reputation: 6013

This is not even an Android problem. You never reset your countPowerOff variable after you have received the 3 key presses. Even after having done that you must consider adding an alarm that will reset your countPowerOff variable to zero after some small timeout. It will allow you to avoid situations where the user does not intend to interact with your application and just presses the button, but it still gets counted.

As to your second question, try implementing an IntentService.

Upvotes: 3

Nishal Kulkarni
Nishal Kulkarni

Reputation: 49

Here is the solution

public class MyReceiver extends BroadcastReceiver {
private static int countPowerOff = 0;

public MyReceiver (){

}

@Override
public void onReceive(Context context, Intent intent){
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)){    
    Log.e("In on receive", "In Method:  ACTION_SCREEN_OFF");
    countPowerOff++;
}
else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)){
    Log.e("In on receive", "In Method:  ACTION_SCREEN_ON");
}
else if(intent.getAction().equals(Intent.ACTION_USER_PRESENT)){
    Log.e("In on receive", "In Method:  ACTION_USER_PRESENT");
    if (countPowerOff >= 2)
    {
        countPowerOff=0;
        Toast.makeText(context, "MAIN ACTIVITY IS BEING CALLED ", Toast.LENGTH_LONG).show();
        Intent i = new Intent(context, About.class);
        i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TOP);
        context.startActivity(i);
    }
}
  }
 }

Upvotes: 0

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