Saturday, March 26, 2016

Dismiss or Cancel dialog by swipe gesture

Dismiss dialog by all four swipe gestures as swipe right to left, left to right, top to bottom, bottom to top First, create a inner class in custom dialogFragment class for the the SimpleGestureListener as,
class MyGestureDetector extends GestureDetector.SimpleOnGestureListener {

        private static final int SWIPE_MIN_DISTANCE = 120;
        private static final int SWIPE_THRESHOLD_VELOCITY = 200;

        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                               float velocityY) {

            if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                // swipe right to left
                dismiss();
            } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                // swipe left to right
                dismiss();
            } else if (e1.getY() - e2.getY() > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
                // top to bottom
                dismiss();
            } else if (e2.getY() - e1.getY() > SWIPE_MIN_DISTANCE
                    && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
                // bottom to top
                dismiss();
            }

            return super.onFling(e1, e2, velocityX, velocityY);
       }
}
Then in onCreateDialog() of dialogFragment,
GestureDetector gestureDetector = new GestureDetector(getActivity(), new MyGestureDetector());
LayoutInflater inflater = getActivity().getLayoutInflater();
View view = inflater.inflate(R.layout.dialog_nmd, null);
view.setOnTouchListener(new View.OnTouchListener() {
   @Override
   public boolean onTouch(View v, MotionEvent event) {
      boolean eventConsumed = gestureDetector.onTouchEvent(event);
      if (eventConsumed) {
          return true;
      } else {
          return false;
       }
    }
});
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setView(view);
dialog = builder.create();
Window window = dialog.getWindow();
window.requestFeature(Window.FEATURE_NO_TITLE);
WindowManager.LayoutParams wlp = window.getAttributes();
window.setAttributes(wlp);
dialog.getWindow().setCallback(windowCallback);
Here the window call back interface is as,
private Window.Callback windowCallback = new Window.Callback() {
        @Override
        public boolean dispatchKeyEvent(KeyEvent event) {
            if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
                getDialog().dismiss();
            }
            return false;
        }

        @Override
        public boolean dispatchKeyShortcutEvent(KeyEvent event) {
            return false;
        }

        @Override
        public boolean dispatchTouchEvent(MotionEvent event) {
            if (gestureDetector != null) {
                return gestureDetector.onTouchEvent(event);
            }
            return false;
        }

        @Override
        public boolean dispatchTrackballEvent(MotionEvent event) {
            return false;
        }

        @Override
        public boolean dispatchGenericMotionEvent(MotionEvent event) {
            return true;
        }

        @Override
        public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
            return false;
        }

        @Nullable
        @Override
        public View onCreatePanelView(int featureId) {
            return null;
        }

        @Override
        public boolean onCreatePanelMenu(int featureId, Menu menu) {
            return false;
        }

        @Override
        public boolean onPreparePanel(int featureId, View view, Menu menu) {
            return false;
        }

        @Override
        public boolean onMenuOpened(int featureId, Menu menu) {
            return false;
        }

        @Override
        public boolean onMenuItemSelected(int featureId, MenuItem item) {
            return false;
        }

        @Override
        public void onWindowAttributesChanged(WindowManager.LayoutParams attrs) {

        }

        @Override
        public void onContentChanged() {

        }

        @Override
        public void onWindowFocusChanged(boolean hasFocus) {

        }

        @Override
        public void onAttachedToWindow() {

        }

        @Override
        public void onDetachedFromWindow() {

        }

        @Override
        public void onPanelClosed(int featureId, Menu menu) {

        }

        @Override
        public boolean onSearchRequested() {
            return false;
        }

        @Nullable
        @Override
        public ActionMode onWindowStartingActionMode(ActionMode.Callback callback) {
            return null;
        }

        @Override
        public void onActionModeStarted(ActionMode mode) {

        }

        @Override
        public void onActionModeFinished(ActionMode mode) {

        }
    };

Note:
Here the tricky part is window callback, if you miss it, then this won't work. You have to override the dispatchTouchEvent() in this interface.

Monday, March 21, 2016

Add Button and onClick on Custom Notification in Android

Add a broadcast receiver with action and pass the Intent with action to PendingIntent The code snippet is as follows,
Intent intent = new Intent("action.cancel.notification");
PendingIntent pi = PendingIntent.getBroadCast(this, id, intent, PendingIntent.FLAG_UPDATE_CUREENT);
Also add the receiver in manifest
<receiver android:name="CancelNotificationReceiver">
<intent-filter>
<action android:name="action.cancel.notification"/>
</intent-filter>
</receiver>
After that, to the pictureView add the pendingIntnet as,
pictureView.setOnClickPendingIntent(R.id.button, pi);
The last part is define the receiver class as,
public class CancelNotificationReceiver extends Broadcastreceiver {
   public void onReceive(Context context, Intent intent) {
     if ("action.cancel.notification".equalsIgnoreCase(intent.getAction())) {
        // .. do what ever you want
     }
   }
}

Androidians