标签:android setimagebitmap setimageresource
在4.0.4 r1.2中查看android.widget.ImageView源代码可以发现,setImageBitmap()方法其实是调用了setImageDrawable()方法进行重绘。
Sets a Bitmap as the content of this ImageView. Parameters: bm The bitmap to set @android.view.RemotableViewMethod public void setImageBitmap(Bitmap bm) { // if this is used frequently, may handle bitmaps explicitly // to reduce the intermediate drawable object setImageDrawable(new BitmapDrawable(mContext.getResources(), bm)); }
Sets a drawable as the content of this ImageView. Parameters: drawable The drawable to set public void setImageDrawable(Drawable drawable) { if (mDrawable != drawable) { mResource = 0; mUri = null; int oldWidth = mDrawableWidth; int oldHeight = mDrawableHeight; updateDrawable(drawable); if (oldWidth != mDrawableWidth || oldHeight != mDrawableHeigh{ requestLayout(); } invalidate(); } }
同样的布局文件,小分辨率手机:
1、使用setImageBitmap设置时,出现如下现象:
2、使用setImageResource时,图片显示正常
原因:
setImageResource(id)会根据设备分辨率进行图片大小缩放适配
setImageBitmap(BitmapFactory.decodeResource(res,id))大小需要手动调。
如果你提供了完整的各种分辨率下的图片的话,两种方法都应该不会有混乱。
赵雅智_setImageResource和setImageBitmap,布布扣,bubuko.com
赵雅智_setImageResource和setImageBitmap
标签:android setimagebitmap setimageresource
原文地址:http://blog.csdn.net/zhaoyazhi2129/article/details/32080827