在版本的Android M错误

读取外部存储许可在onCreate方法在版本的Android M错误

if (ContextCompat.checkSelfPermission(thisActivity, 
      Manifest.permission.READ_EXTERNAL_STORAGE) 
    != PackageManager.PERMISSION_GRANTED) { 

// Should we show an explanation? 
if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity, 
     Manifest.permission.READ_EXTERNAL_STORAGE)) { 


} else { 

    ActivityCompat.requestPermissions(thisActivity, 
      new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 
      PERMISSION_REQUEST_CODE); 
}

在onRequestPermissionsResult

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

     if (grantResults.length > 0 
      && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
      String path = Environment.getExternalStorageState(); 

     } else { 

     } 
     return; 
    } 
}

我已经努力尝试但都崩溃的应用程序结束。权限不被授予应用程序。为什么？我做错了什么？您的帮助将不胜感激。

来源

2017-01-29 Abdullah

你能从日志发布异常时崩溃发生？ –

AndroidRuntime：致命例外：主要进程：com.google.android.packageinstaller，PID：14436 java.lang.RuntimeException：无法启动活动ComponentInfo {com.google.android.packageinstaller/com.android.packageinstaller.permission。 ui.GrantPermissionsActivity}：java.lang.NullPointerException：尝试获取空数组的长度 at android.app.ActivityThread.performLaunchActivity – Abdullah

我用这个作为我的代码，从计算器了，却忘了谁回答这个问题

public boolean hasPermission(Context context, String... permissions){ 
     for (String permission : permissions) { 
      if (ContextCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) { 
       return false; 
      } 
     } 
     return true; 
    } 
    int PERMISSION_ALL = 1; 
    String[] PERMISSIONS = { 
      Manifest.permission.INTERNET, 
      Manifest.permission.ACCESS_FINE_LOCATION, 
      Manifest.permission.ACCESS_NETWORK_STATE, 
      Manifest.permission.CHANGE_NETWORK_STATE, 
      Manifest.permission.WRITE_SETTINGS, 
      Manifest.permission.CAMERA, 
      Manifest.permission.RECEIVE_SMS, 
      Manifest.permission.SEND_SMS, 
      Manifest.permission.WRITE_EXTERNAL_STORAGE, 
      Manifest.permission.ACCESS_WIFI_STATE, 
      Manifest.permission.CHANGE_WIFI_STATE, 
      Manifest.permission.ACCESS_COARSE_LOCATION, 
      Manifest.permission.READ_CONTACTS}; 
    public void checkAllPermission(){ 
     if (!hasPermission(getActivity(), PERMISSIONS)){ 
      ActivityCompat.requestPermissions(getActivity(), PERMISSIONS, PERMISSION_ALL); 
     } 
    } 
}

尝试（如修改您的需要）

来源

2017-01-29 21:49:09

我曾尝试过这种代码更简单的形式，但给我同样的错误 – Abdullah

是你的清单已经很好？（完整） –

ntaloventi是的。 – Abdullah

在版本的Android M错误

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