Rotation is not smooth ,can someone help me.
Drag left to right for clockwise rotation
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package R.com;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;
public class RActivity extends Activity implements OnTouchListener {
/** Called when the activity is first created. */
Matrix matrix = new Matrix();
ImageView imageView;
double downx = 0, downy = 0, upx = 0, upy = 0;
LinearLayout llLayout;
float scaleHeight=0;
float scaleWidth=0;
protected double dw;
protected double dh;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
imageView = (ImageView) findViewById(R.id.imageView1);
View contentView = (View) findViewById(R.id.llayout);
contentView.setOnTouchListener((View.OnTouchListener) this);
Display currentDisplay = getWindowManager().getDefaultDisplay();
dw = currentDisplay.getWidth();
dh = currentDisplay.getHeight();
}
@Override
public boolean onTouch(View arg0, MotionEvent event) {
// TODO Auto-generated method stub
double angle = 0;
Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),
R.drawable.icon);
int width = bitmapOrg.getWidth();
int height = bitmapOrg.getHeight();
Bitmap resizedBitmap;
BitmapDrawable bmd;
int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
downx = event.getX();
downy = event.getY();
break;
case MotionEvent.ACTION_MOVE:
upx = event.getX();
upy = event.getY();
//Toast.makeText(this, ""+upx, Toast.LENGTH_SHORT).show();
//Toast.makeText(this, ""+upy, Toast.LENGTH_SHORT).show();
double diff=(upy-downy)+(upx-downx);
if(diff>0)
angle = 3+Math.atan((downy - upy) / (downx - upx));
else
angle = Math.atan((downy - upy) / (downx - upx))-2;
Toast.makeText(this, ""+angle, Toast.LENGTH_SHORT).show();
matrix.postRotate((float) angle);
resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0, width, height, matrix, true);
bmd = new BitmapDrawable(resizedBitmap);
imageView.setImageDrawable(bmd);
break;
case MotionEvent.ACTION_UP:
upx = event.getX();
upy = event.getY();
break;
}
return true;
}
}
