如何从Android的内部存储中检索位图文件？

Question

我使用此代码位图图像保存到Android的内部存储：

public boolean saveImageToInternalStorage(JSONObject jobj, int flag) { 
    try { 
     URL url = new URL("http://192.168.43.94" + jobj.get("location")); 
     Bitmap bmp = BitmapFactory.decodeStream(url.openConnection().getInputStream()); 
     FileOutputStream fos = null; 

     // Use the compress method on the Bitmap object to write image to 
     // the OutputStream 

     if (flag == 0) { 
      fos = context.openFileOutput("0_" + jobj.getString("id") + ".png", Context.MODE_PRIVATE); 
     } else { 
      fos = context.openFileOutput(jobj.getString("first_category") + "_" + jobj.getString("id") + ".png", Context.MODE_PRIVATE); 
     } 

     // Writing the bitmap to the out stream 
     bmp.compress(Bitmap.CompressFormat.PNG, 100, fos); 
     fos.close(); 
     System.out.println("Picture saved successfully"); 
     return true; 
    } catch (Exception e) { 
     Log.e("saveToInternalStorage()", e.getMessage()); 
     return false; 
    } 

我怎样才能事后检索位图文件？

Answer 1

您可以使用此代码加载位图：

InputStream is = context.openFileInput(filename); 
Bitmap bitmap = BitmapFactory.decodeStream(is); 
is.close(); 
// and now you can use bitmap