android-gesture

Can we use scale gesture detector for pinch zoom in Android?

You can use this import android.content.Context; import android.graphics.Canvas; import android.graphics.drawable.BitmapDrawable; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.ScaleGestureDetector; import android.view.View; public class MyImageView extends View { private static final int INVALID_POINTER_ID = -1; private Drawable mImage; private float mPosX; private float mPosY; private float mLastTouchX; private float mLastTouchY; private int mActivePointerId = INVALID_POINTER_ID; private ScaleGestureDetector … Read more

android – How can I make a button flash?

There are several, depending on what kind of flashing you mean. You can, for example, use alpha animation and start it as your button first appears. And when the user clicks button, in your OnClickListener just do clearAnimation(). Example: public void onCreate(Bundle savedInstanceState) { final Animation animation = new AlphaAnimation(1, 0); // Change alpha from … Read more