Rotate Image In Android

I want rotate image in both the ways Clockwise as well as Anti clock wise. I had try but not rotate image both the way, so plz give me solution for my problem if you know.. Thanks

Solution 1:

Use the code below

publicclassRotateimageextendsActivity {

@OverridepublicvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_gallery);
          // or just load a resource from the res/drawable directory:BitmapmyBitmap= BitmapFactory.decodeResource(getResources(), R.drawable.flo);

          // find the width and height of the screen:Displayd= getWindowManager().getDefaultDisplay();
          intx= d.getWidth();
          inty= d.getHeight();

          // get a reference to the ImageView component that will display the image:ImageViewimg1= (ImageView)findViewById(R.id.imageView1);

          // scale it to fit the screen, x and y swapped because my image is wider than it is tallBitmapscaledBitmap= Bitmap.createScaledBitmap(myBitmap, y, x, true);

          // create a matrix objectMatrixmatrix=newMatrix();

          matrix.postRotate(45, 90, 180);

          // create a new bitmap from the original using the matrix to transform the resultBitmaprotatedBitmap= Bitmap.createBitmap(scaledBitmap , 0, 0, scaledBitmap .getWidth(), scaledBitmap .getHeight(), matrix, true);
                // display the rotated bitmap
          img1.setImageBitmap(rotatedBitmap);
}}

Solution 2:

Here is the base code to load a bitmap and rotate it left or right:

// Load a bitmap from a drawable, make sure this drawable exists in your projectBitmapsprite= BitmapFactory.decodeResource(this.getResources(),
        R.drawable.ic_launcher);

// Create two matrices that will be used to rotate the bitmapMatrixrotateRight=newMatrix();
MatrixrotateLeft=newMatrix();

// Set the matrices with the desired rotation 90 or -90 degrees
rotateRight.preRotate(90);
rotateLeft.preRotate(-90);

// Create bitmaps based on the loaded bitmap 'sprite' and apply one of// the rotation matricesBitmaprSprite= Bitmap.createBitmap(sprite, 0, 0,
        sprite.getWidth(), sprite.getHeight(), rotateRight, true);
BitmaplSprite= Bitmap.createBitmap(sprite, 0, 0,
        sprite.getWidth(), sprite.getHeight(), rotateLeft, true);

Now go and use rSprite and lSprite.

Here is a full sample that actually draws the bitmaps to screen:

publicclassMainActivityextendsActivity {

    @OverridepublicvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(newdrawView(this));
    }

    privateclassdrawViewextendsView{
        publicdrawView(Context context){
            super(context);
        }

        @OverrideprotectedvoidonDraw(Canvas canvas) {
            super.onDraw(canvas);

            // Load a bitmap from a drawable, make sure this drawable exists in your projectBitmapsprite= BitmapFactory.decodeResource(this.getResources(),
                    R.drawable.ic_launcher);

            // Create two matrices that will be used to rotate the bitmapMatrixrotateRight=newMatrix();
            MatrixrotateLeft=newMatrix();

            // Set the matrices with the desired rotation 90 or -90 degrees
            rotateRight.preRotate(90);
            rotateLeft.preRotate(-90);

            // Create bitmaps based on the loaded bitmap 'sprite' and apply one of// the rotation matricesBitmaprSprite= Bitmap.createBitmap(sprite, 0, 0,
                    sprite.getWidth(), sprite.getHeight(), rotateRight, true);
            BitmaplSprite= Bitmap.createBitmap(sprite, 0, 0,
                    sprite.getWidth(), sprite.getHeight(), rotateLeft, true);

            //Draw the first unrotated sprite at the top left of the screen
            canvas.drawBitmap(sprite, 0, 0, null);

            //Draw the rotated right sprite on the 2nd row
            canvas.drawBitmap(rSprite, 0, sprite.getHeight() + 5, null);

            //Draw the rotated left sprite on the 3rd row
            canvas.drawBitmap(lSprite, 0, sprite.getHeight() * 2 + 5, null);
        }
    }
}

Solution 3:

You just add this simple code to your button

            imVCature_pic.setRotation(imVCature_pic.getRotation() + 90);

Solution 4:

Matrixmat=newMatrix();
mat.preRotate(angle);///in degreeBitmapmBitmap= Bitmap.createBitmap(originalBmp, 0, 0, modWidth, modHeight, mat, true);
        //originalBmp -> original img as bitmap//modHeight -> new height//modWidth -> new width

use the above code.