home.md

-PowerOff screen recovery :
 
-
-```java
-/**
+[Keep screen awake on power off](poweroff-screen-recovery)
+[Building OTA images](build-ota-images)
\ No newline at end of file
- * Usage :
- *
- * onResume()
- * mScreenOffWakeupReceiver = new ScreenOffWakeupReceiver();
- * // optional if we should return to a specific activity
- * mScreenOffWakeupReceiver.setWakeupActivity( getPackageManager().getLaunchIntentForPackage(getPackageName()));
- * registerReceiver(mScreenOffWakeupReceiver, mScreenOffWakeupReceiver.getFilters());
- *
- * onPause()
- * if (mScreenOffWakeupReceiver!=null)
- *    unregisterReceiver( mScreenOffWakeupReceiver );
- *
- *    Requires Permission:   android.permission.WAKE_LOCK
-
- */
-public class ScreenOffWakeupReceiver extends BroadcastReceiver {
-    private static final String TAG = "ScreenOffWakeupRcvr";
-    public static final String ACTION_COLD_WATER = "com.buzztime.intent.action.COLD_WATER";
-    private static Intent wakeupIntent = null;
-
-    public void setWakeupActivity( Intent intent ){
-        wakeupIntent = new Intent(intent);
-        wakeupIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NO_ANIMATION | Intent.FLAG_ACTIVITY_NEW_TASK);
-    }
-
-    public IntentFilter getFilters() {
-        return new IntentFilter(){{
-            addAction(Intent.ACTION_SCREEN_OFF);
-            addAction(ACTION_COLD_WATER);
-        }};
-    }
-
-    @Override
-    public void onReceive(Context context, Intent intent) {
-        String action = intent.getAction();
-        Log.d(TAG, action);
-
-        if (Intent.ACTION_SCREEN_OFF.equals(action)) {
-
-            // Screen off indicated..
-            // Use AlarmManager to wake the unit up again
-            Intent i = new Intent(ACTION_COLD_WATER)
-                .setClass(context, ScreenOffWakeupReceiver.class);
-            PendingIntent sender = PendingIntent.getBroadcast(context, 192837, i, PendingIntent.FLAG_UPDATE_CURRENT);
-
-            // Get the AlarmManager service
-            AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
-            if (Build.VERSION.SDK_INT >= 23 ){
-                am.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 500, sender);
-            } else
-            if (Build.VERSION.SDK_INT >= 19){
-                am.setExact(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 750, sender);
-            } else {
-                am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 500, sender);
-            }
-
-        } else if (ACTION_COLD_WATER.equals(action)) {
-            // after a short pause, AlarmManager will wake us up and let us run our activity
-            PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
-            if (!pm.isInteractive()) {
-                PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK
-                    | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE , "wlKiosk");
-                wl.acquire(10000);
-                PowerManager.WakeLock wlCpu = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "wlKioskCpu");
-                wlCpu.acquire(10000);
-                wlCpu.release();
-            }
-
-            if (wakeupIntent!=null) {
-                context.startActivity( wakeupIntent );
-            }
-
-        }
-    }
-}
-
-```