it-swarm-eu.dev

In che modo è possibile verificare l'autorizzazione in fase di esecuzione senza generare SecurityException?

Progetto una funzione che può ottenere/impostare una risorsa da SD e se non trovata da sd quindi prelevarla da Asset e, se possibile, riportare la risorsa a SD
Questa funzione può controllare tramite richiamo del metodo se la SD è montata e accessibile ...

boolean bSDisAvalaible = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);

La mia funzione progettata può essere utilizzata da un'app (progetto) a un'altra (con o senza Android.permission.WRITE_EXTERNAL_STORAGE)

Quindi vorrei verificare se l'applicazione corrente ha questa particolare autorizzazione senza giocare con SecurityException.

Esiste un modo "bello" per consultare le autorizzazioni definite correnti in fase di runtime?

83
Emmanuel Devaux

Puoi usare la funzione Context.checkCallingorSelfPermission() per questo. Ecco un esempio:

private boolean checkWriteExternalPermission()
{
    String permission = Android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
    int res = getContext().checkCallingOrSelfPermission(permission);
    return (res == PackageManager.PERMISSION_GRANTED);            
}
176
inazaruk

Anche questa è un'altra soluzione 

PackageManager pm = context.getPackageManager();
int hasPerm = pm.checkPermission(
    Android.Manifest.permission.WRITE_EXTERNAL_STORAGE, 
    context.getPackageName());
if (hasPerm != PackageManager.PERMISSION_GRANTED) {
   // do stuff
}
48
user123321

Puoi anche usare questo:

private boolean doesUserHavePermission()
{
    int result = context.checkCallingOrSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE);
    return result == PackageManager.PERMISSION_GRANTED;
}
18
MrAppa

Come Google documentazione

// Assume thisActivity is the current activity
int permissionCheck = ContextCompat.checkSelfPermission(thisActivity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
11
beni

Condividere i miei metodi nel caso qualcuno li abbia bisogno:

 /** Determines if the context calling has the required permission
 * @param context - the IPC context
 * @param permissions - The permissions to check
 * @return true if the IPC has the granted permission
 */
public static boolean hasPermission(Context context, String permission) {

    int res = context.checkCallingOrSelfPermission(permission);

    Log.v(TAG, "permission: " + permission + " = \t\t" + 
    (res == PackageManager.PERMISSION_GRANTED ? "GRANTED" : "DENIED"));

    return res == PackageManager.PERMISSION_GRANTED;

}

/** Determines if the context calling has the required permissions
 * @param context - the IPC context
 * @param permissions - The permissions to check
 * @return true if the IPC has the granted permission
 */
public static boolean hasPermissions(Context context, String... permissions) {

    boolean hasAllPermissions = true;

    for(String permission : permissions) {
        //you can return false instead of assigning, but by assigning you can log all permission values
        if (! hasPermission(context, permission)) {hasAllPermissions = false; }
    }

    return hasAllPermissions;

}

E chiamarlo:

boolean hasAndroidPermissions = SystemUtils.hasPermissions(mContext, new String[] {
                Android.Manifest.permission.ACCESS_WIFI_STATE,
                Android.Manifest.permission.READ_PHONE_STATE,
                Android.Manifest.permission.ACCESS_NETWORK_STATE,
                Android.Manifest.permission.INTERNET,
        });
8
htafoya

Dovresti controllare le autorizzazioni nel modo seguente (come descritto qui Autorizzazioni Android ):

int result = ContextCompat.checkSelfPermission(getContext(), Manifest.permission.READ_PHONE_STATE);

quindi, confronta il risultato con:

result == PackageManager.PERMISSION_DENIED

o:

result == PackageManager.PERMISSION_GRANTED
5
box

Il codice che funziona bene per me è: -

  final int MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE = 102;
  if ((ContextCompat.checkSelfPermission(getActivity(),Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)) {

                requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                        MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);
            } else {
        // user already provided permission
                // perform function for what you want to achieve
     }

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

    boolean canUseExternalStorage = false;

    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE: {
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                canUseExternalStorage = true;
            }

            if (!canUseExternalStorage) {
                Toast.makeText(getActivity(), "Cannot use this feature without requested permission", Toast.LENGTH_SHORT).show();
            } else {
                // user now provided permission
                // perform function for what you want to achieve
            }
        }
      }
 }
2
Sanoop

Abilita posizione GPS Android Studio

  1. Aggiungi autorizzazione per AndroidManifest.Xml

  1. MapsActivity.Java

    public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
    
    private GoogleMap mMap;
    private Context context;
    private static final int PERMISSION_REQUEST_CODE = 1;
    Activity activity;
    /**
     * ATTENTION: This was auto-generated to implement the App Indexing API.
     * See https://g.co/AppIndexing/AndroidStudio for more information.
     */
    private GoogleApiClient client;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        context = getApplicationContext();
        activity = this;
        super.onCreate(savedInstanceState);
        requestPermission();
        checkPermission();
        setContentView(R.layout.activity_maps);
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    
    }
    
    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;
        LatLng location = new LatLng(0, 0);
        mMap.addMarker(new MarkerOptions().position(location).title("Marker in Bangalore"));
        mMap.moveCamera(CameraUpdateFactory.newLatLng(location));
        mMap.setMyLocationEnabled(true);
    }
    
    private void requestPermission() {
        if (ActivityCompat.shouldShowRequestPermissionRationale(activity, Manifest.permission.ACCESS_FINE_LOCATION)) {
            Toast.makeText(context, "GPS permission allows us to access location data. Please allow in App Settings for additional functionality.", Toast.LENGTH_LONG).show();
        } else {
            ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, PERMISSION_REQUEST_CODE);
        }
    }
    
    private boolean checkPermission() {
        int result = ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION);
        if (result == PackageManager.PERMISSION_GRANTED) {
            return true;
        } else {
            return false;
        }
    }
    
0
Naveen Sharma

Passaggio 1 - aggiungi richiesta di autorizzazione 

    String[] permissionArrays = new String[]{Manifest.permission.CAMERA, 
    Manifest.permission.WRITE_EXTERNAL_STORAGE};
    String REQUEST_CODE = 101;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            requestPermissions(permissionArrays, REQUEST_CODE );
        } else {
             // if already permition granted
            // PUT YOUR ACTION (Like Open cemara etc..)
        }
    }

Passaggio 2 - Gestire il risultato delle autorizzazioni 

     @Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    boolean openActivityOnce = true;
    boolean openDialogOnce = true;
    if (requestCode == REQUEST_CODE ) {
        for (int i = 0; i < grantResults.length; i++) {
            String permission = permissions[i];

            isPermitted = grantResults[i] == PackageManager.PERMISSION_GRANTED;

            if (grantResults[i] == PackageManager.PERMISSION_DENIED) {
                // user rejected the permission

            }else {
                //  user grant the permission
                // you can perfome your action 
            }
        }
    }
}
0
if ((ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) && (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) && (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)) {

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

        requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA},
                MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);
    }
} 
0
dhaval malavia

Controlla le autorizzazioni in KOTLIN (RunTime)

In Manifest: (Android.permission.WRITE_EXTERNAL_STORAGE)

    fun checkPermissions(){

      var permission_array=arrayOf(Android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
      if((ContextCompat.checkSelfPermission(this,permission_array[0]))==PackageManager.PERMI   SSION_DENIED){
        requestPermissions(permission_array,0)
      }
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)

          if(requestCode==0 && grantResults[0]==PackageManager.PERMISSION_GRANTED){

       //Do Your Operations Here

        ---------->
         //


          }
    }
0