Image rotating in Android

There is an easy way for image rotating in Android from code. I am going to show example.
Here I will use application’s icon as image and Matrix class.
Example:

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.ViewGroup.LayoutParams;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ImageView.ScaleType;public class Main extends Activity{ @Override  public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); LinearLayout linearLayout = new LinearLayout(this);Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.drawable.icon);int width = bitmap.getWidth();int height = bitmap.getHeight();Matrix matrix = new Matrix();matrix.postRotate(90);Bitmap rotatedBitmap = Bitmap.createBitmap(bitmap,0,0,width,height,matrix,true);BitmapDrawable bmd = new BitmapDrawable(rotatedBitmap);ImageView imageView = new ImageView(this);imageView.setImageDrawable(bmd);imageView.setScaleType(ScaleType.CENTER);linearLayout.addView(imageView,new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT));setContentView(linearLayout); }}

That’s all.
Main methods are:

matrix.postRotate(90);

and

Bitmap rotatedBitmap = Bitmap.createBitmap(bitmap,0,0,width,height,matrix,true);

As you can see it is simple.

Download code from this article.