Android(安卓)中Bitmap 进行绘制编辑

private void drawBitmap(Bitmap bitmap) {        Bitmap newBmp = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig());        Canvas canvas = new Canvas(newBmp);        Paint p = new Paint();        canvas.drawBitmap(bitmap, 0, 0, p);        imageView.setImageBitmap(newBmp);}

private void drawMatrixBitmap(Bitmap bitmap) {        Bitmap newBmp = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig());        Canvas canvas = new Canvas(newBmp);        Paint p = new Paint();//        Matrix matrix = new Matrix();//        matrix.setValues(new float[]{//                .5f, 0, 0,//                0, 1, 0,//                0, 0, 1//        });//        Matrix matrix = new Matrix();//        matrix.setValues(new float[] {//                1, .5f, 0,//                0, 1, 0,//                0, 0, 1//        });        Matrix matrix = new Matrix();//        matrix.setRotate(15);//        matrix.setScale(1,0.5f);//        matrix.setTranslate(1.5f,-10);//        matrix.setScale(1.5f, 1);//        matrix.postRotate(15,bitmap.getWidth()/2,bitmap.getHeight()/2);        // 镜像//        matrix.setScale(-1, 1);//        matrix.postTranslate(bitmap.getWidth(),0);        // 倒置        matrix.setScale(1, -1);        matrix.postTranslate(0, bitmap.getHeight());        canvas.drawBitmap(bitmap, matrix, p);        imageView.setImageBitmap(newBmp);}

 private void matrixAndBitmap(Bitmap bitmap) {        Matrix matrix = new Matrix();        matrix.setRotate(15, bitmap.getWidth() / 2, bitmap.getHeight() / 2);        Bitmap alteredBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(),                matrix, false);        imageView.setImageBitmap(alteredBitmap);}

private void colorMatrixDraw(Bitmap bitmap) {        Bitmap alteredBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig());        Canvas canvas = new Canvas(alteredBitmap);        Paint paint = new Paint();        ColorMatrix cm = new ColorMatrix();//        cm.set(new float[] {//                2, 0, 0, 0, 0,//                0, 1, 0, 0, 0,//                0, 0, 1, 0, 0,//                0, 0, 0, 1, 0//        });//        float contrast = 2;//        cm.set(new float[] {//                contrast, 0, 0, 0, 0,//                0, contrast, 0, 0, 0,//                0, 0, contrast, 0, 0,//                0, 0, 0, 1, 0 });//        float brightness = -25;//        cm.set(new float[] {//                1, 0, 0, 0, brightness,//                0, 1, 0, 0, brightness,//                0, 0, 1, 0, brightness,//                0, 0, 0, 1, 0 });//        float contrast = 2;//        float brightness = -25;//        cm.set(new float[] {//                contrast, 0, 0, 0, brightness,//                0, contrast, 0, 0, brightness,//                0, 0, contrast, 0, brightness,//                0, 0, 0, contrast, 0 });        cm.setSaturation(0.5f);        paint.setColorFilter(new ColorMatrixColorFilter(cm));        Matrix matrix = new Matrix();        canvas.drawBitmap(bitmap, matrix, paint);        imageView.setImageBitmap(alteredBitmap);}

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