從Android中的自定義應用程序圖像路徑讀取圖像

Question

如何從下列路徑讀取圖像作爲位圖？謝謝。

String path = "file:///storage/emulated/0/Pictures/MY_FILES/1371983157229.jpg"; 
String path = "file:///storage/sdcard0/Android/data/com.dropbox.android/files/scratch/Camera%20Uploads/2045.12.png"; 

Answer 1

應該使用==>BitmapFactory.decodeFile(pathName)方法。如果文件在外部stroge聲明許可清單中

Answer 2

使用此方法BitmapFactory這將返回一個位圖對象..

BitmapFactory.decodeFile(path); 

Answer 3

其他的答案是正確的，但可能是你會得到一個OutOfMemoryError爲high resolution相似圖片相機圖片的圖像。所以要避免這一點，你可以使用下面的功能

public static Bitmap decodeFile(File f,int WIDTH,int HIGHT){ 
     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_WIDTH=WIDTH; 
      final int REQUIRED_HIGHT=HIGHT; 
      //Find the correct scale value. It should be the power of 2. 
      int scale=1; 
      while(o.outWidth/scale/2>=REQUIRED_WIDTH && o.outHeight/scale/2>=REQUIRED_HIGHT) 
       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; 
    } 

看到該錯誤https://stackoverflow.com/a/13226946/942224