當前android的屏幕截圖活動

Question

我從互聯網上獲取此代碼以捕獲當前活動的屏幕。

View rootView = findViewById(android.R.id.content).getRootView(); 
    rootView.setDrawingCacheEnabled(true); 
    Bitmap bitmap = rootView.getDrawingCache(); 
    String str = new SimpleDateFormat("MM_dd_yyyy_HH_mm_ss").format(Calendar.getInstance().getTime()) + ".jpg"; 

    File imagePath = new File(Environment.getExternalStorageDirectory() , str); 

    Log.i("catpure", "" + Environment.getExternalStorageDirectory() ); 
    FileOutputStream fos; 
    try { 
     fos = new FileOutputStream(imagePath); 
     bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos); 
     fos.flush(); 
     fos.close(); 
    } catch (FileNotFoundException e) { 
     Log.e("GREC", e.getMessage(), e); 
    } catch (IOException e) { 
     Log.e("GREC", e.getMessage(), e); 
    } 

我也嘗試了不同的代碼。沒有什麼是爲我工作的。 logcat中沒有錯誤。該代碼運行沒有任何錯誤，但仍然沒有保存圖像。請讓我知道我錯了。提前致謝。

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編輯

我檢查我的代碼和錯誤日誌。它顯示： Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied).

但我有

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 

在AndroidManifest.xml

。

什麼是問題？請幫忙。

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UPDATE 它的一款Android 5問題：

Known Issue

Answer 1

該函數將返回當前活動的位圖。所以你要保存，如果你想以後使用，或者如果你在同一個應用程序需要，那麼你可以用位圖對象使用

public static Bitmap captureScreenshot(Activity activity) { 
    View view = activity.getWindow().getDecorView(); 
    view.setDrawingCacheEnabled(true); 
    view.buildDrawingCache(); 
    Bitmap bitmap = view.getDrawingCache(); 
    Rect rect = new Rect(); 
    activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect); 
    int statusBarHeight = rect.top; 
    @SuppressWarnings("deprecation") 
    int width = activity.getWindowManager().getDefaultDisplay().getWidth(); 
    @SuppressWarnings("deprecation") 
    int height = activity.getWindowManager().getDefaultDisplay().getHeight(); 
    Bitmap bitmap2 = Bitmap.createBitmap(bitmap, 0, statusBarHeight, width, height - statusBarHeight); 
    view.destroyDrawingCache(); 
    return bitmap2; 
} 

這裏是保存位圖功能：

private void saveImagetoSDCard(Bitmap bitmap) 
{ 
    Bitmap bit=takeScreenshot(DisplayImage.this); 

    try 
    { 
     String file_path = Environment.getExternalStorageDirectory().getAbsolutePath(); 
     File storagePath = new File(Environment.getExternalStorageDirectory() + "/MyCameraApp/"); 
     file = new File(storagePath, "Yudiz_krrish.png"); 

     Log.d("TAG","File path after editing :"+file.getPath().toString()); 
     FileOutputStream fOut = null; 

     fOut = new FileOutputStream(file); 
     bit.compress(Bitmap.CompressFormat.PNG, 85, fOut); 

     fOut.flush(); 
     fOut.close(); 
     btn_changeSettiong.setVisibility(View.VISIBLE); 
     btn_saveImage.setVisibility(View.VISIBLE); 

    } catch (Exception e) { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 

}