當應用程序從背景中刪除時，權限不見了

我要求在運行時在棉花糖和以上設備上的Android應用程序的權限。權限被正確授予，但一旦我殺了應用程序（從後臺移除而不是強制停止），權限就消失了，當您再次打開應用程序時，它會再次請求權限。當應用程序從背景中刪除時，權限不見了

boolean granted=checkPermission(); 
    Log.d("Permission already there","---"+granted);// it always returns false 

    if (Build.VERSION.SDK_INT >= 23) { 
     System.out.println("Build version is"+Build.VERSION.SDK_INT); 
     if(!granted){ 
      requestPermission(); 
     } 
    } 


    private void requestPermission() { 

    ActivityCompat.requestPermissions(activity,new String[]{ 
      Manifest.permission.ACCESS_FINE_LOCATION, 
      Manifest.permission.RECORD_AUDIO, 
      Manifest.permission.CALL_PHONE, 
      Manifest.permission.CAMERA, 
      Manifest.permission.WRITE_EXTERNAL_STORAGE, 
      Manifest.permission.READ_CONTACTS, 
      Manifest.permission.GET_ACCOUNTS, 

    },RequestPermissionCode); 

} 
@Override 
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { 
    switch (requestCode) { 

    case RequestPermissionCode: 

     if (grantResults.length > 0) { 

      boolean ACCESS_FINE_LOCATION = grantResults[0] == PackageManager.PERMISSION_GRANTED; 
      boolean RECORD_AUDIO = grantResults[1] == PackageManager.PERMISSION_GRANTED; 
      boolean CALL_PHONE = grantResults[2] == PackageManager.PERMISSION_GRANTED; 
      boolean CAMERA = grantResults[3] == PackageManager.PERMISSION_GRANTED; 
      boolean WRITE_EXTERNAL_STORAGE = grantResults[4] == PackageManager.PERMISSION_GRANTED; 
      boolean GET_ACCOUNTS = grantResults[5] == PackageManager.PERMISSION_GRANTED; 
      boolean READ_CONTACTS = grantResults[6] == PackageManager.PERMISSION_GRANTED; 



      if (ACCESS_FINE_LOCATION && RECORD_AUDIO && CALL_PHONE && CAMERA && WRITE_EXTERNAL_STORAGE && GET_ACCOUNTS && READ_CONTACTS) { 

       Toast.makeText(MainActivity.this, "Permission Granted", Toast.LENGTH_LONG).show(); 
      } 
      else { 
       Toast.makeText(MainActivity.this,"Permission Denied",Toast.LENGTH_LONG).show(); 

      } 
     } 

     break; 
    } 
} 

public boolean checkPermission() { 


    int FirstPermissionResult= ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION); 
    int SecondPermissionResult=ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.RECORD_AUDIO); 
    int ThirdPermissionResult=ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CALL_PHONE); 
    int FourthPermissionResult=ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA); 
    int FifthPermissionResult=ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE); 
    int SixthPermissionResult=ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.GET_ACCOUNTS); 
    int SeventhPermissionResult=ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_CONTACTS); 

    return FirstPermissionResult == PackageManager.PERMISSION_GRANTED && 
      SecondPermissionResult == PackageManager.PERMISSION_GRANTED && 
      ThirdPermissionResult == PackageManager.PERMISSION_GRANTED && 
      FourthPermissionResult == PackageManager.PERMISSION_GRANTED && 
      FifthPermissionResult == PackageManager.PERMISSION_GRANTED && 
      SixthPermissionResult == PackageManager.PERMISSION_GRANTED && 
      SeventhPermissionResult == PackageManager.PERMISSION_GRANTED; 
}

來源

2016-11-10 Kalpit

從Android的源和文檔在PackageManager

public static final int PERMISSION_DENIED = -1; 
public static final int PERMISSION_GRANTED = 0;

，並在您的代碼，你加起來所有的權限許可的結果。因此，即使只有一個項目權限未被授予，您的result變量將變爲-1，並且您的方法返回false;

您的代碼的另一個問題是，您正在詢問諸如VIBRATE之類的內容的權限，請閱讀此doc以瞭解正常權限和危險權限之間的區別。

最後但也是最重要的問題，一次詢問所有運行時權限不是由google推薦的。而且也有App Store將拒絕您的應用程序沒有遵循權限的原則機會

編輯：刪除列表這些權限，然後再試一次

Manifest.permission.MODIFY_AUDIO_SETTINGS 
Manifest.permission.CAPTURE_AUDIO_OUTPUT 
Manifest.permission.CAPTURE_VIDEO_OUTPUT 
Manifest.permission.CAPTURE_SECURE_VIDEO_OUTPUT 
Manifest.permission.ACCESS_NETWORK_STATE 
Manifest.permission.VIBRATE

請仔細閱讀文檔，它清楚地提到您不要求run time permissions爲normal permissions

來源

2016-11-10 08:08:51

我正在授予所有權限，但每當我重新打開我的應用程序時，它仍會返回false。 – Kalpit

我添加了必須從列表中刪除的權限列表。 –

https://inthecheesefactory.com/blog/things-you-need-to-know-about-android-m-permission-developer-edition/en也讀過這個 –

當應用程序從背景中刪除時，權限不見了

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