1

我找到了这个功能

//decodes image and scales it to reduce memory consumption
private Bitmap decodeFile(File f){
   try {
    //Decode image size
    BitmapFactory.Options o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(new FileInputStream(f),null,o);

    //The new size we want to scale to
    final int REQUIRED_SIZE=70;

    //Find the correct scale value. It should be the power of 2.
    int scale=1;
    while(o.outWidth/scale/2>=REQUIRED_SIZE && o.outHeight/scale/2>=REQUIRED_SIZE)
        scale*=2;

    //Decode with inSampleSize
    BitmapFactory.Options o2 = new BitmapFactory.Options();
    o2.inSampleSize=scale;
    return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
return null;
}

我的问题很简单，如果我的图像来自 res/drawable，我该如何使用此功能？我使用 decodeResource(getResources(),R.drawable.android); 但是当我使用 ViewPager 在我的应用程序中实现时给我内存不足

4

1 回答 1

2

解码位图时，只需将 BitmanFactory.Options 放在最后。

Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.yourbitmap, o2);
于 2012-07-24T12:54:43.057 回答