Resolved issue of Home screen widget

app/src/main/AndroidManifest.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools" >
+    xmlns:tools="http://schemas.android.com/tools">
+
 
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 
@@ -14,29 +15,44 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.MusicPlayer"
-        tools:targetApi="31" >
+        tools:targetApi="31">
+
+
+        <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>
+
+        <!-- PlaySong activity -->
         <activity
             android:name=".PlaySong"
             android:exported="false"
             android:parentActivityName="com.example.musicplayer.MainActivity">
-
             <meta-data
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value="com.example.musicplayer.MainActivity"/>
         </activity>
-        <activity
-            android:name=".MainActivity"
-            android:exported="true" >
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
 
-                <category android:name="android.intent.category.LAUNCHER" />
+        <!-- Music Widget Receiver -->
+        <receiver
+            android:name=".MusicWidgetProvider"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
             </intent-filter>
-
             <meta-data
-                android:name="android.app.lib_name"
-                android:value="" />
-        </activity>
-    </application>
+                android:name="android.appwidget.provider"
+                android:resource="@xml/music_widget_info" />
+        </receiver>
 
-</manifest>
+
+        <service
+            android:name=".MusicService"
+            android:exported="true" />
+
+    </application>
+</manifest>

app/src/main/java/com/example/musicplayer/CustomAdapter.java

@@ -31,7 +31,7 @@ public ViewHolder(View view) {
             super(view);
             view.setOnClickListener(this);
             textView = (TextView) view.findViewById(R.id.textView);
-            // Define click listener for the ViewHolder's View
+
 
         }
 
@@ -75,12 +75,11 @@ public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
     @Override
     public void onBindViewHolder(ViewHolder viewHolder, final int position) {
 
-        // Get element from your dataset at this position and replace the
-        // contents of the view with that element
+
         viewHolder.getTextView().setText(localdataset.get(position).getName());
     }
 
-    // Return the size of your dataset (invoked by the layout manager)
+
     @Override
     public int getItemCount() {
         return localdataset.size();

app/src/main/java/com/example/musicplayer/MainActivity.java

@@ -1,28 +1,16 @@
 package com.example.musicplayer;
 
-import androidx.annotation.NonNull;
-
-
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.recyclerview.widget.DividerItemDecoration;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
 import android.Manifest;
-import android.content.Intent;
-import android.os.Build;
 import android.os.Bundle;
 import android.os.Environment;
-import android.os.storage.StorageManager;
-import android.os.storage.StorageVolume;
-import android.util.Log;
-import android.view.MotionEvent;
-import android.view.View;
-import android.widget.ArrayAdapter;
 import android.widget.Toast;
 
 import com.karumi.dexter.Dexter;
-import com.karumi.dexter.DexterBuilder;
 import com.karumi.dexter.PermissionToken;
 import com.karumi.dexter.listener.PermissionDeniedResponse;
 import com.karumi.dexter.listener.PermissionGrantedResponse;
@@ -31,26 +19,21 @@
 
 import java.io.File;
 import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 
 public class MainActivity extends AppCompatActivity {
     private RecyclerView recyclerView;
-    //public static HashMap<String,String> mp;
     public static ArrayList<File> Songs;
 
-    //Method that returns an ArrayList of Files whose name ends with .mp3 and does not start with a .
-    public static ArrayList<File> getSongs(File file){
+    // Method that returns an ArrayList of Files whose name ends with .mp3 and does not start with a .
+    public static ArrayList<File> getSongs(File file) {
         ArrayList<File> ans = new ArrayList<>();
         File[] listFiles = file.listFiles();
-        if(listFiles!=null){
-            for(File curr:listFiles){
-                if(!curr.isHidden() && curr.isDirectory()){
+        if (listFiles != null) {
+            for (File curr : listFiles) {
+                if (!curr.isHidden() && curr.isDirectory()) {
                     ans.addAll(getSongs(curr));
-                }
-                else{
-                    if(curr.getName().endsWith(".mp3") && !curr.getName().startsWith(".")){
+                } else {
+                    if (curr.getName().endsWith(".mp3") && !curr.getName().startsWith(".")) {
                         ans.add(curr);
                     }
                 }
@@ -65,74 +48,30 @@ protected void onCreate(Bundle savedInstanceState) {
         setContentView(R.layout.activity_main);
         recyclerView = findViewById(R.id.recyclerView);
 
-        //Permission from User for External Storage Read Access using Dexter Library
+        // Permission from User for External Storage Read Access using Dexter Library
         Dexter.withContext(this)
                 .withPermission(Manifest.permission.READ_EXTERNAL_STORAGE)
                 .withListener(new PermissionListener() {
-                    //If Permission granted
-
 
                     @Override
                     public void onPermissionGranted(PermissionGrantedResponse permissionGrantedResponse) {
-
-
-//                        StorageManager storageManager = (StorageManager) getSystemService(STORAGE_SERVICE);
-//                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-//                            List<StorageVolume> volumes = storageManager.getStorageVolumes();
-//                            int i=0;
-//                            while(i<volumes.size()){
-//                                Log.d("MyLog",volumes.get(i).toString());
-//                                i++;
-//                            }
-//                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
-//                                if (volumes.get(0).getDirectory()==Environment.getExternalStorageDirectory()){
-//                                    Log.d("MyLog","0Internal");
-//                                }
-//                                else{
-//                                    Log.d("MyLog","0External");
-//                                }
-//                            }
-//                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
-//                                if (volumes.get(1).getDirectory()==Environment.getExternalStorageDirectory()){
-//                                    Log.d("MyLog","1Internal");
-//                                }
-//                                else{
-//                                    Log.d("MyLog","1External");
-//                                }
-//                            }
-//                        }
-
-                        //StorageManager storageManager = (StorageManager)getSystemService(STORAGE_SERVICE);
-                        //List<StorageVolume> vol = storageManager.getStorageVolumes();
-
-
-
-                        //Getting a List of Songs in the form of a String
-                        //songs = getSongs(vol.get(1).getDirectory());
                         Songs = getSongs(Environment.getExternalStorageDirectory());
 
-
-                        //Setting Recycler View
+                        // Setting Recycler View
                         LinearLayoutManager llm = new LinearLayoutManager(MainActivity.this);
                         recyclerView.setLayoutManager(llm);
                         CustomAdapter adapter = new CustomAdapter(Songs);
                         recyclerView.setAdapter(adapter);
                         DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(),
                                 llm.getOrientation());
                         recyclerView.addItemDecoration(dividerItemDecoration);
-                        //recyclerView.se
-
-
-
                     }
 
-                    //If Permission is not granted
                     @Override
                     public void onPermissionDenied(PermissionDeniedResponse permissionDeniedResponse) {
                         Toast.makeText(MainActivity.this, "This Permission is required to proceed further", Toast.LENGTH_SHORT).show();
                     }
 
-                    //Permission not granted and App reopened
                     @Override
                     public void onPermissionRationaleShouldBeShown(PermissionRequest permissionRequest, PermissionToken permissionToken) {
                         permissionToken.continuePermissionRequest();
@@ -141,32 +80,23 @@ public void onPermissionRationaleShouldBeShown(PermissionRequest permissionReque
                 .check();
     }
 
-
-
     @Override
     protected void onPause() {
         super.onPause();
-
     }
 
     @Override
     protected void onResume() {
         super.onResume();
-//        Intent backToMain = getIntent();
-//        int song_position = backToMain.getIntExtra("com.example.musicplayer.PlaySong.SongPosition", 0);
     }
 
     @Override
     protected void onRestart() {
         super.onRestart();
     }
 
-
     @Override
     protected void onDestroy() {
         super.onDestroy();
     }
 }
-
-
-

app/src/main/java/com/example/musicplayer/MusicService.java

@@ -0,0 +1,64 @@
+package com.example.musicplayer;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+import android.widget.Toast;
+
+public class MusicService extends Service {
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+
+        if (intent != null && intent.getAction() != null) {
+            switch (intent.getAction()) {
+                case "PLAY_PAUSE":
+                    handlePlayPause();
+                    break;
+                case "NEXT":
+                    handleNext();
+                    break;
+                case "PREVIOUS":
+                    handlePrevious();
+                    break;
+                case "FORWARD":
+                    handleForward();
+                    break;
+                case "REWIND":
+                    handleRewind();
+                    break;
+            }
+        }
+        return START_STICKY;
+    }
+
+    private void handlePlayPause() {
+
+        Toast.makeText(this, "Play/Pause clicked", Toast.LENGTH_SHORT).show();
+    }
+
+    private void handleNext() {
+
+        Toast.makeText(this, "Next clicked", Toast.LENGTH_SHORT).show();
+    }
+
+    private void handlePrevious() {
+
+        Toast.makeText(this, "Previous clicked", Toast.LENGTH_SHORT).show();
+    }
+
+    private void handleForward() {
+
+        Toast.makeText(this, "Forward clicked", Toast.LENGTH_SHORT).show();
+    }
+
+    private void handleRewind() {
+
+        Toast.makeText(this, "Rewind clicked", Toast.LENGTH_SHORT).show();
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+}