Image Rotation in ImageView (Android)

Before Rotation

After Rotation

180 Degree

270 Degree

Create new Android Project

Project Name: PlayingwithBitmaps

Build Target: Android 2.3.3   //or greater than that

Application Name: PlayingwithBitmaps

Package Name: com.hamad.playingwithbitmaps

Create Activity: Main

Min SDK: 10 // or greater than that

  1. create main layout:

• One image view to display the image.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000000"
    android:id="@+id/rlMain" >

    <ImageView
        android:id="@+id/imViewAndroid"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:src="@drawable/car" />

</RelativeLayout>

 2. code of main activity:

package com.shaikhhamadali.blogspot.playingwithbitmaps;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.widget.ImageView;

public class Main extends Activity {
    ImageView imViewAndroid;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imViewAndroid = (ImageView) findViewById(R.id.imViewAndroid);
        imViewAndroid.setImageBitmap(rotateImage(BitmapFactory.decodeResource(getResources(), R.drawable.beautiful),270));
 }
 public Bitmap rotateImage(Bitmap src, float degree) {
     // create new matrix object
     Matrix matrix = new Matrix();
     // setup rotation degree
     matrix.postRotate(degree);
     // return new bitmap rotated using matrix
     return Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true);
 }
}

   3. note that:

• With the help of this,rotateImage() method you can rotate image on image on click,on action_down,on etc.

  4. conclusion:

• Some information about Matrix and Image Rotaion.
• Know how to rotate image bitmap from drawables.

  5. About the post:

•  The code seems to explain itself due to comments, and is very easy to understand.
•  Don’t mind to write a comment whatever you like to ask, to know,to suggest or recommend.
•  Hope you enjoy it!

6. Source Code:

        you can download the source code here

Cheers,

Hamad Ali Shaikh

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