Manage External Storage Permission

Previously (before Android 11) we only need to request the WRITE_EXTERNAL_STORAGE Permission to perform the storage-related tasks. But, now for Android 11 and above we have to request the MANAGE_EXTERNAL_STORAGE Permission to perform the storage-related tasks. Keep in mind that if you're 100% sure that your app requires this permission to work properly then request this permission otherwise Google will not allow you to publish/update your app. For example, if your app is WhatsApp Status Saver then you won't be allowed to use this permission as your app works with images and videos, not files.
After permission is granted, I'll input a name and create a folder with that name just for example. You can do whatever you want instead.

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Video Tutorial:

Coding:

AndroidManifest.xml

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

    <!--Permissions for the Android below 11 (R)-->
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <!--Permission for the Android 11 (R) and above-->
    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>

    <!--Android 10 only requires android:requestLegacyExternalStorage="true"-->

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

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

</manifest>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    android:padding="20dp"
    tools:context=".MainActivity">

    <!--EditText: Input Folder Name-->
    <EditText
        android:id="@+id/folderNameEt"
        android:layout_width="match_parent"
        android:layout_marginTop="10dp"
        android:layout_height="wrap_content"
        android:hint="Folder Name..."/>

    <!--Button: Create folder-->
    <com.google.android.material.button.MaterialButton
        android:id="@+id/createFolderBtn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:text="Create Folder"/>

</LinearLayout>

MainActivity.java

package com.technifysoft.manageexternalstoragejava;

import androidx.activity.result.ActivityResult;
import androidx.activity.result.ActivityResultCallback;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.Settings;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.material.button.MaterialButton;

import java.io.File;

public class MainActivity extends AppCompatActivity {

    //PERMISSION request constant, assign any value
    private static final int STORAGE_PERMISSION_CODE = 100;

    private static final String TAG = "PERMISSION_TAG";

    //UI Views
    private EditText folderNameEt;
    private MaterialButton createFolderBtn;

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

        //init UI Views
        folderNameEt = findViewById(R.id.folderNameEt);
        createFolderBtn = findViewById(R.id.createFolderBtn);

        //handle click, create folder
        createFolderBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (checkPermission()) {
                    Log.d(TAG, "onClick: Permissions already granted...");
                    createFolder();
                } else {
                    Log.d(TAG, "onClick: Permissions was not granted, request...");
                    requestPermission();
                }
            }
        });

    }

    private void createFolder(){
        //get folder name
        String folderName = folderNameEt.getText().toString().trim();

        //create folder using name we just input
        File file = new File(Environment.getExternalStorageDirectory() + "/" + folderName);
        //create folder
        boolean folderCreated = file.mkdir();

        //show if folder created or not
        if (folderCreated) {
            Toast.makeText(this, "Folder Created....\n" + file.getAbsolutePath(), Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(this, "Folder not created...", Toast.LENGTH_SHORT).show();
        }

    }

    private void requestPermission(){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R){
            //Android is 11(R) or above
            try {
                Log.d(TAG, "requestPermission: try");

                Intent intent = new Intent();
                intent.setAction(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION);
                Uri uri = Uri.fromParts("package", this.getPackageName(), null);
                intent.setData(uri);
                storageActivityResultLauncher.launch(intent);
            }
            catch (Exception e){
                Log.e(TAG, "requestPermission: catch", e);
                Intent intent = new Intent();
                intent.setAction(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION);
                storageActivityResultLauncher.launch(intent);
            }
        }
        else {
            //Android is below 11(R)
            ActivityCompat.requestPermissions(
                    this,
                    new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE},
                    STORAGE_PERMISSION_CODE
            );
        }
    }

    private ActivityResultLauncher<Intent> storageActivityResultLauncher = registerForActivityResult(
            new ActivityResultContracts.StartActivityForResult(),
            new ActivityResultCallback<ActivityResult>() {
                @Override
                public void onActivityResult(ActivityResult result) {
                    Log.d(TAG, "onActivityResult: ");
                    //here we will handle the result of our intent
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R){
                        //Android is 11(R) or above
                        if (Environment.isExternalStorageManager()){
                            //Manage External Storage Permission is granted
                            Log.d(TAG, "onActivityResult: Manage External Storage Permission is granted");
                            createFolder();
                        }
                        else{
                            //Manage External Storage Permission is denied
                            Log.d(TAG, "onActivityResult: Manage External Storage Permission is denied");
                            Toast.makeText(MainActivity.this, "Manage External Storage Permission is denied", Toast.LENGTH_SHORT).show();
                        }
                    }
                    else {
                        //Android is below 11(R)
                    }
                }
            }
    );

    public boolean checkPermission(){
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R){
            //Android is 11(R) or above
            return Environment.isExternalStorageManager();
        }
        else{
            //Android is below 11(R)
            int write = ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);
            int read = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE);

            return write == PackageManager.PERMISSION_GRANTED && read == PackageManager.PERMISSION_GRANTED;
        }
    }

    /*Handle permission request results*/
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == STORAGE_PERMISSION_CODE){
            if (grantResults.length > 0){
                //check each permission if granted or not
                boolean write = grantResults[0] == PackageManager.PERMISSION_GRANTED;
                boolean read = grantResults[1] == PackageManager.PERMISSION_GRANTED;

                if (write && read){
                    //External Storage permissions granted
                    Log.d(TAG, "onRequestPermissionsResult: External Storage permissions granted");
                    createFolder();
                }
                else{
                    //External Storage permission denied
                    Log.d(TAG, "onRequestPermissionsResult: External Storage permission denied");
                    Toast.makeText(this, "External Storage permission denied", Toast.LENGTH_SHORT).show();
                }
            }
        }
    }
}

Output

Manage External Storage Permission | Android Studio | Java

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