Android權限：用戶按下後執行的任務「允許」

Question

我想知道是否有當用戶按下「允許」的聯繫方式按鈕進入/日曆訪問等等。我們可以找出事件的方式，

我知道有一種方法，要求與ActivityCompat.requestPermissions權限，但在那裏執行用戶授予權限之後的行動呢？

Answer 1

首先定義變量：

public static int MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION = 1; 

請求許可使用：

if (ActivityCompat.checkSelfPermission(this, 
     android.Manifest.permission.ACCESS_FINE_LOCATION) 
     != PackageManager.PERMISSION_GRANTED) { 
    // Should we show an explanation? 
    if (ActivityCompat.shouldShowRequestPermissionRationale(this, 
      android.Manifest.permission.ACCESS_FINE_LOCATION)) { 
     // Show an explanation to the user *asynchronously* -- don't block 
     // this thread waiting for the user's response! After the user 
     // sees the explanation, try again to request the permission. 
    } else { 
     // No explanation needed, we can request the permission. 
     ActivityCompat.requestPermissions(this, 
       new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION); 
     // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an 
     // app-defined int constant. The callback method gets the 
     // result of the request. 
    } 
} 

現在使用捕捉結果：

 @Override 
public void onRequestPermissionsResult(int requestCode, 
     String permissions[], int[] grantResults) { 
    switch (requestCode) { 
     case MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION : { 
      // If request is cancelled, the result arrays are empty. 
      if (grantResults.length > 0 
       && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 

       // permission was granted, yay! Do the 
       // contacts-related task you need to do. 
       Toast.makeText(getApplicationContext(), "Permission granted", Toast.LENGTH_SHORT).show(); 

      } else { 

       // permission denied, boo! Disable the 
       // functionality that depends on this permission. 
       Toast.makeText(getApplicationContext(), "Permission denied", Toast.LENGTH_SHORT).show(); 
      } 
      return; 
     } 

     // other 'case' lines to check for other 
     // permissions this app might request 
    } 
} 

FOR FRAGMENT

如果您在fragment嘗試此代碼，更改

checkSelfPermission()

到

ActivityCompact.checkSelfPermission()

，改變

ActivityCompat.requestPermissions()

到

requestPermissions()

許可結果的處理（允許或拒絕）是相同的活性。

更完整的例子來看看這個Answer Here

Answer 2

呼叫requestPermissions()請求的權限。您可以在onRequestPermissionsResult()中找到結果，並確定他們是否授予了許可。從應用程序代碼的角度來看，這就是「之後」。

Answer 3

我用這個代碼，這個根本目的。

public boolean isPermissionGranted() { 

    if (Build.VERSION.SDK_INT >= 23) { 
     if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) 
       == PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) 
       == PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.CAMERA) 
       == PackageManager.PERMISSION_GRANTED) { 
      Log.v(TAG, "Permission is granted"); 
      return true; 
     } else { 
      ActivityCompat.requestPermissions(this, new String[]{ 
        Manifest.permission.CAMERA 
      }, 1); 
      return false; 
     } 
    } else { //permission is automatically granted on sdk<23 upon installation 
     Log.v(TAG, "Permission is granted"); 
     return true; 
    } 

} 

然後，您可以撥打：

if(isPermissionGranted()) 
    { 
     // do your stuff 
    }