Android ImageView Rotate Example.

Hello this is the tutorial for the android imageview rotate example.

MainActivity.java

package androidanswers.imagerotateapplication;

import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;

public class MainActivity extends ActionBarActivity {

    private Bitmap bmp;
    private Bitmap operation;
    ImageView i;

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        i = (ImageView) this.findViewById(R.id.imageView);

        BitmapDrawable abmp = (BitmapDrawable) i.getDrawable();
        bmp = abmp.getBitmap();

        rotate180(bmp);


    }



    @Override    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.  
      
getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will  
       // automatically handle clicks on the Home/Up button, so long  
       // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();

        //noinspection SimplifiableIfStatement        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private void rotate180(Bitmap bmp) {
        operation = Bitmap.createBitmap(bmp.getWidth(),bmp.getHeight(), bmp.getConfig());
        int width = bmp.getWidth(); //the Width of the original image        

int height = bmp.getHeight();//the Height of the original image
        for (int i = 0; i < bmp.getWidth(); i++) {
            for (int j = 0; j < bmp.getHeight(); j++) {

                operation.setPixel(bmp.getWidth() - i - 1, bmp.getHeight() - j - 1, bmp.getPixel(i, j));
            }
        }
        i.setImageBitmap(operation);
    }

   

Activity_main.xml 

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    
xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="androidanswers.imagerotateapplication.MainActivity">

    <ImageView        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:id="@+id/imageView"        android:layout_marginTop="92dp"        android:contentDescription="SampleImage"        android:src="@drawable/spidey"        android:scaleType="center"        />
</LinearLayout>

Output Screen Shot.

After the Prg Run