大图处理

大图处理

闲着没事写的一个方法

 public Bitmap getTargetBitmap(int iamgeResource,int targetWidth,int targetHeight) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    //设置options
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeResource(getResources(),iamgeResource,options);
    int outWidth = options.outWidth;
    int outHeight = options.outHeight;
    //计算宽高比
    int widthB = outWidth / targetWidth;
    int heightB = outHeight / targetHeight;
    //使用合适的比例
    int targetComple = widthB > heightB ? widthB : heightB;
    //重新设置options
    options.inSampleSize = targetComple;
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeResource(getResources(),iamgeResource,options);
}