BitmapFactory.decodeFile（）返回null，當我試圖讓圖像

Question

String imageInSD = Environment.getExternalStorageDirectory()+"/DCIM/Soovy/2089.jpg";   
Bitmap bitmap = BitmapFactory.decodeFile(imageInSD); 

if(bitmap == null){     
    Log.v("combine image", "null"); 
}else{ 
    Log.v("combine image", "not null");     
} 

更新：使用Environment.getExternalStorageDirectory（）感謝您的信息

Answer 1

不要直接訪問SD卡，試圖通過Environment訪問它。

像這樣：

String imageDir = Environment.getExternalStorageDirectory()+"/DCIM/Soovy/2089.jpg"; 

Bitmap bitmap = BitmapFactory.decodeFile(imageDir); 

if(bitmap == null){     
    Log.v("combine image", "null"); 
}else{ 
    Log.v("combine image", "not null");     
} 

Answer 2

試試這個：

String imageInSD = "file:///mnt/sdcard/DCIM/Soovy/2089.jpg";   

您應該然而，不是硬編碼路徑。使用

Environment.getExternalStorageState() 

得到sdcard的根。

String imageInSD = Environment.getExternalStorageState() + "/DCIM/Soovy/2089.jpg";