拼图效果

public static Bitmap getComponseBitmap(Bitmap src, Bitmap src2){
if(src == null || src2 == null)
return null;

int width = src.getWidth();
int height = src.getHeight();
Bitmap newBitmap = Bitmap.createBitmap(width, height, Config.RGB_565);
Canvas canvas = new Canvas(newBitmap);
canvas.drawBitmap(src, 0, 0, null);

Bitmap zoomBitmap = zoomImage(src2, 640, 360);
canvas.drawBitmap(zoomBitmap, 200, 200, null);
canvas.save(Canvas.ALL_SAVE_FLAG );
canvas.restore();

return newBitmap;
}

//等比缩放图片
public static Bitmap zoomImage(Bitmap bitmap, int newWidth, int newHeight){
int width = bitmap.getWidth();
int height = bitmap.getHeight();
//计算缩放比例
float scaleW = (float)newWidth/width;
float sacleH = (float)newHeight/height;
//取得缩放Matrix参数
Matrix matrix = new Matrix();
matrix.postScale(scaleW, sacleH);
matrix.postRotate(30);
//得到新图片
Bitmap newBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
return newBitmap;
}