rotate and Translate Bitmap - Android android.graphics

Android examples for android.graphics:Bitmap Operation

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  4. Bitmap Operation

Description

rotate and Translate Bitmap

Demo Code

import android.graphics.Bitmap;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.TransitionDrawable;
import android.lemon.assist.Base64;
import android.lemon.dct.FDCT;
import android.view.View;
import android.view.View;
import android.widget.ImageView;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public class Main{

    public static Bitmap rotateBitmapTranslate(Bitmap bitmap, float degrees) {
        Bitmap mBitmap = null;/*from  ww  w .ja  v  a 2 s  .com*/
        int width;
        int height;
        try {
            Matrix matrix = new Matrix();
            if ((degrees / 90) % 2 != 0) {
                width = bitmap.getWidth();
                height = bitmap.getHeight();
            } else {
                width = bitmap.getHeight();
                height = bitmap.getWidth();
            }
            int cx = width / 2;
            int cy = height / 2;
            matrix.preTranslate(-cx, -cy);
            matrix.postRotate(degrees);
            matrix.postTranslate(cx, cy);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return mBitmap;
    }

}

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