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PermissionsDispatcher Library to make Easier Permission Requests

Posted on November 26, 2021November 26, 2021 By christo No Comments on PermissionsDispatcher Library to make Easier Permission Requests

Full project with source code to request certain “dangerous” permissions at runtime. This process usually needs a lot of if/else checks, but the PermissionsDispatcher library simplifies this with the use of annotations. We will learn how to request a permission, how to show a proper rationale and how to handle situations when the user granted or denied the permission or even checked the “never as again” box

Gradle

dependencies {
  implementation "com.github.permissions-dispatcher:permissionsdispatcher:${latest.version}"
  annotationProcessor "com.github.permissions-dispatcher:permissionsdispatcher-processor:${latest.version}"
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    tools:context="tech.codingpoint.permissiondispatcherexample.MainActivity">

    <Button
        android:id="@+id/button_open_camera"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="open camera"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="tech.codingpoint.permissiondispatcherexample">

    <uses-permission android:name="android.permission.CAMERA"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

MainActivity.java

package tech.codingpoint.permissiondispatcherexample;

import android.Manifest;
import android.content.DialogInterface;
import android.support.annotation.NonNull;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import permissions.dispatcher.NeedsPermission;
import permissions.dispatcher.OnNeverAskAgain;
import permissions.dispatcher.OnPermissionDenied;
import permissions.dispatcher.OnShowRationale;
import permissions.dispatcher.PermissionRequest;
import permissions.dispatcher.RuntimePermissions;

@RuntimePermissions
public class MainActivity extends AppCompatActivity {

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

        Button buttonOpenCamera = findViewById(R.id.button_open_camera);
        buttonOpenCamera.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                MainActivityPermissionsDispatcher.openCameraWithPermissionCheck(MainActivity.this);
            }
        });
    }

    @NeedsPermission(Manifest.permission.CAMERA)
    void openCamera() {
        Toast.makeText(this, "Opening Camera", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        MainActivityPermissionsDispatcher.onRequestPermissionsResult(this, requestCode, grantResults);
    }

    @OnShowRationale(Manifest.permission.CAMERA)
    void showRationaleForCamera(final PermissionRequest request) {
        new AlertDialog.Builder(this)
                .setTitle("Permission needed")
                .setMessage("This permission is needed because of this and  that")
                .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        request.proceed();
                    }
                })
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        request.cancel();
                    }
                })
                .show();
    }

    @OnPermissionDenied(Manifest.permission.CAMERA)
    void onCameraDenied() {
        Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show();
    }

    @OnNeverAskAgain(Manifest.permission.CAMERA)
    void onNeverAskAgain() {
        Toast.makeText(this, "Never asking again", Toast.LENGTH_SHORT).show();
    }
}
android Tags:Android, PermissionsDispatcher

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