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androidonpausescreen-lock
Zaid Iqbal
Zaid Iqbal

Reputation: 131

Check whether onPause state of activity is called due to screen lock

If my app is running and I press lock screen button, it will put the app in background.What is the method to check whether onPause() is called by screen lock?.Thanks in advance.

Upvotes: 1

Views: 4440

Answers (3)

SyedAliNaqi
SyedAliNaqi

Reputation: 244

On Pause Cycle

You Can Simply Know It By Using This Method

@Override
public void onPause() {
super.onPause();  // Always call the superclass method first
System.out.println("On Pause called");
}

For Keeping The Device Awake while lock screen. Documentation.

Ok in your case you would need Wake_Lock

To use a wake lock, the first step is to add the WAKE_LOCK permission to your application's manifest file:

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

If your app includes a broadcast receiver that uses a service to do some work, you can manage your wake lock through a WakefulBroadcastReceiver, as described in Using a WakefulBroadcastReceiver. This is the preferred approach. If your app doesn't follow that pattern, here is how you set a wake lock directly:

PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
Wakelock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
    "MyWakelockTag");
wakeLock.acquire();

To release the wake lock, call wakelock.release(). This releases your claim to the CPU. It's important to release a wake lock as soon as your app is finished using it to avoid draining the battery.

DO this after setting powermanager.

boolean screenOn;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
    screenOn = powerManager.isInteractive();
} else {
    screenOn = powerManager.isScreenOn();
}

if (screenOn) {
    // Screen is still on, so do your thing here
}

Upvotes: 1

Nicklas Jensen
Nicklas Jensen

Reputation: 1474

All you have to do is check if the screen is on or not.

@Override
protected void onPause() {
    super.onPause();

    PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);

    boolean screenOn;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
        screenOn = pm.isInteractive();
    } else {
        screenOn = pm.isScreenOn();
    }

    if (screenOn) {
        // Screen is still on, so do your thing here
    }
}

Upvotes: 9

aProperFox
aProperFox

Reputation: 2174

You just want to know when onPause is called? You could override the super function and add logging to the function:

@Override
public void onPause() {
  super.onPause();
  System.out.println("On Pause called");
}

Upvotes: 0

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