Android Easy Runtime Permissions with Dexter

Android Easy Runtime Permissions with Karumi/Dexter :

1. Dexter Permissions Library :dependencies dependencies {    // Dexter runtime permissions    implementation 'com.karumi:dexter:4.2.0'}1.1 Requesting Single Permission :To request one permission, you'll use withPermission() methodology by passing the desired permission.
You also want a PermissionListener recall to receive the state of the permission.
> onPermissionGranted() will be called once the permission is granted.> onPermissionDenied() will be called when the permission is denied.Here you will check whether or not the permission is for good denied by mistreatmentresponse.isPermanentlyDenied() condition.
The below code requests CAMERA permission:
Dexter.withActivity(this)                .withPermission(Manifest.permission.CAMERA)                .withListener(new PermissionListener() {                    @Override                    public void onPermissionGranted(PermissionGrantedResponse response) {                        // permission is granted, open the camera                    }                    @Override                    public void onPermissionDenied(PermissionDeniedResponse response) {                        // check for permanent denial of permission                        if (response.isPermanentlyDenied()) {                            // navigate user to app settings                        }                    }                    @Override                    public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) {                        token.continuePermissionRequest();                    }                }).check();


To request multiple permissions at an equivalent time, you will use withPermissions() methodology.Below code requests STORAGE and LOCATION permissions.
Dexter.withActivity(this)                .withPermissions(

                        Manifest.permission.READ_EXTERNAL_STORAGE,

                        Manifest.permission.READ_EXTERNAL_STORAGE,

                        Manifest.permission.WRITE_EXTERNAL_STORAGE,

                        Manifest.permission.WRITE_EXTERNAL_STORAGE,

                        Manifest.permission.ACCESS_FINE_LOCATION)

                        Manifest.permission.ACCESS_FINE_LOCATION)

                .withListener(new MultiplePermissionsListener() {

                .withListener(new MultiplePermissionsListener() {

                    @Override

                    @Override

                    public void onPermissionsChecked(MultiplePermissionsReport report) {

                    public void onPermissionsChecked(MultiplePermissionsReport report) {

                        // check if all permissions are granted

                        // check if all permissions are granted

                        if (report.areAllPermissionsGranted()) {

                        if (report.areAllPermissionsGranted()) {

                            // do you work now

                            // do you work now

                        }

                        }

                        // check for permanent denial of any permission

                        if (report.isAnyPermissionPermanentlyDenied()) {

                        if (report.isAnyPermissionPermanentlyDenied()) {

                            // permission is denied permenantly, navigate user to app settings

                            // permission is denied permenantly, navigate user to app settings

                        }

                        }

                    }

                    }

                    @Override

                    public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) {

                    public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) {

                        token.continuePermissionRequest();

                        token.continuePermissionRequest();

                    }

                    }

                })

                })

                .onSameThread()

                .onSameThread()

                .check();

                .check();







You can conjointly catch any errors occurred whereas desegregation the library mistreatmentPermissionRequestErrorListener.

You can conjointly catch any errors occurred whereas desegregation the library mistreatmentPermissionRequestErrorListener.

Dexter.withActivity(this)

                .withPermissions(

                        Manifest.permission.READ_EXTERNAL_STORAGE,

                        Manifest.permission.ACCESS_FINE_LOCATION)

                .withListener(listener)

                .withErrorListener(new PermissionRequestErrorListener() {

                    @Override

                    public void onError(DexterError error) {

                        Toast.makeText(getApplicationContext(), "Error occurred! " + error.toString(), Toast.LENGTH_SHORT).show();

                    }

                })

                .check();

Dexter.withActivity(this)                .withPermissions(                        Manifest.permission.READ_EXTERNAL_STORAGE,                        Manifest.permission.ACCESS_FINE_LOCATION)                .withListener(listener)                .withErrorListener(new PermissionRequestErrorListener() {                    @Override                    public void onError(DexterError error) {                        Toast.makeText(getApplicationContext(), "Error occurred! " + error.toString(), Toast.LENGTH_SHORT).show();                    }                })                .check();ow let’s see the way to use dextral in associate example project.
2. Creating New Project1. produce a replacement project in mechanical man Studio from File ⇒ New Project and choose Basic Activity from templates.
2. Add Dexter dependency to your build.gradle

dependencies {     implementation fileTree(dir: 'libs', include: ['*.jar'])     implementation 'com.android.support:appcompat-v7:26.1.0'     // ...     // Dexter runtime permissions     implementation 'com.karumi:dexter:4.2.0' } 3. Open the layout file of your main activity (activity_main.xml and content_main.xml) and add 2 buttons to check completely different permission ways. content_main.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     app:layout_behavior="@string/appbar_scrolling_view_behavior"     tools:context="info.androidhive.dexterpermissions.MainActivity"     tools:showIn="@layout/activity_main">     <LinearLayout         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_marginTop="100dp"         android:orientation="vertical"         android:layout_centerHorizontal="true"         android:paddingLeft="16dp"         android:paddingRight="16dp">         <Button             android:id="@+id/btn_camera"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:layout_marginBottom="16dp"             android:text="CAMERA PERMISSION" />         <Button             android:id="@+id/btn_storage"             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:text="MULTIPLE PERMISSIONS" />     </LinearLayout> </RelativeLayout> 4. Open MainActivity.java and do the modification as shown below. > requestStoragePermission() requests for camera permission. > requestStoragePermission() requests multiple permissions at once. > response.isPermanentlyDenied() and report.isAnyPermissionPermanentlyDenied() checks if the permission is denied permanently. Here we have to navigate user to app settings screen by showing a dialog. MainActivity.java package info.androidhive.dexterpermissions; import android.Manifest; import android.content.DialogInterface; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.provider.MediaStore; import android.provider.Settings; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.View; import android.view.Menu; import android.view.MenuItem; import android.widget.Button; import android.widget.Toast; import com.karumi.dexter.Dexter; import com.karumi.dexter.MultiplePermissionsReport; import com.karumi.dexter.PermissionToken; import com.karumi.dexter.listener.DexterError; import com.karumi.dexter.listener.PermissionDeniedResponse; import com.karumi.dexter.listener.PermissionGrantedResponse; import com.karumi.dexter.listener.PermissionRequest; import com.karumi.dexter.listener.PermissionRequestErrorListener; import com.karumi.dexter.listener.multi.MultiplePermissionsListener; import com.karumi.dexter.listener.single.PermissionListener; import java.util.List; public class MainActivity extends AppCompatActivity {     private Button btnCamera, btnStorage;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);         setSupportActionBar(toolbar);         btnCamera = findViewById(R.id.btn_camera);         btnStorage = findViewById(R.id.btn_storage);         btnCamera.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View view) {                 requestCameraPermission();             }         });         btnStorage.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View view) {                 requestStoragePermission();             }         });     }     /**      * Requesting multiple permissions (storage and location) at once      * This uses multiple permission model from dexter      * On permanent denial opens settings dialog      */     private void requestStoragePermission() {         Dexter.withActivity(this)                 .withPermissions(                         Manifest.permission.READ_EXTERNAL_STORAGE,                         Manifest.permission.WRITE_EXTERNAL_STORAGE,                         Manifest.permission.ACCESS_FINE_LOCATION)                 .withListener(new MultiplePermissionsListener() {                     @Override                     public void onPermissionsChecked(MultiplePermissionsReport report) {                         // check if all permissions are granted                         if (report.areAllPermissionsGranted()) {                             Toast.makeText(getApplicationContext(), "All permissions are granted!", Toast.LENGTH_SHORT).show();                         }                         // check for permanent denial of any permission                         if (report.isAnyPermissionPermanentlyDenied()) {                             // show alert dialog navigating to Settings                             showSettingsDialog();                         }                     }                     @Override                     public void onPermissionRationaleShouldBeShown(List<PermissionRequest> permissions, PermissionToken token) {                         token.continuePermissionRequest();                     }                 }).                 withErrorListener(new PermissionRequestErrorListener() {                     @Override                     public void onError(DexterError error) {                         Toast.makeText(getApplicationContext(), "Error occurred! ", Toast.LENGTH_SHORT).show();                     }                 })                 .onSameThread()                 .check();     }     /**      * Requesting camera permission      * This uses single permission model from dexter      * Once the permission granted, opens the camera      * On permanent denial opens settings dialog      */     private void requestCameraPermission() {         Dexter.withActivity(this)                 .withPermission(Manifest.permission.CAMERA)                 .withListener(new PermissionListener() {                     @Override                     public void onPermissionGranted(PermissionGrantedResponse response) {                         // permission is granted                         openCamera();                     }                     @Override                     public void onPermissionDenied(PermissionDeniedResponse response) {                         // check for permanent denial of permission                         if (response.isPermanentlyDenied()) {                             showSettingsDialog();                         }                     }                     @Override                     public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) {                         token.continuePermissionRequest();                     }                 }).check();     }     /**      * Showing Alert Dialog with Settings option      * Navigates user to app settings      * NOTE: Keep proper title and message depending on your app      */     private void showSettingsDialog() {         AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);         builder.setTitle("Need Permissions");         builder.setMessage("This app needs permission to use this feature. You can grant them in app settings.");         builder.setPositiveButton("GOTO SETTINGS", new DialogInterface.OnClickListener() {             @Override             public void onClick(DialogInterface dialog, int which) {                 dialog.cancel();                 openSettings();             }         });         builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {             @Override             public void onClick(DialogInterface dialog, int which) {                 dialog.cancel();             }         });         builder.show();     }     // navigating user to app settings     private void openSettings() {         Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);         Uri uri = Uri.fromParts("package", getPackageName(), null);         intent.setData(uri);         startActivityForResult(intent, 101);     }     private void openCamera() {         Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);         startActivityForResult(intent, 100);     } }