Help to fix the Audio Music Player Errors!!

Hello good morning for everyone I´m a beginner on the Android Studio, and i need a help for you to place well the app, that means working perfectly. It´s a good app, and it could serve me as a example to understand its funcionality.

I´m building an audio music player app., but on my MainActivity.java file ,


In the code i faced with some mistakes, see below the images that i sent you. How could you fix them?


MainActivity.java

Code (Java):

1. package com.example.musicaudioplayer;
2.  
3.  
4. import androidx.annotation.NonNull;
5.  
6. import androidx.annotation.Nullable;
7.  
8. import androidx.appcompat.app.AppCompatActivity;
9.  
10. import androidx.core.app.ActivityCompat;
11.  
12. import androidx.core.content.ContextCompat;
13.  
14. import androidx.fragment.app.Fragment;
15.  
16. import androidx.fragment.app.FragmentManager;
17.  
18. import androidx.fragment.app.FragmentPagerAdapter;
19.  
20. import androidx.viewpager.widget.ViewPager;
21.  
22.  
23. import android.content.Context;
24.  
25. import android.content.pm.PackageManager;
26.  
27. import android.net.Uri;
28.  
29. import android.os.Bundle;
30.  
31. import android.provider.MediaStore;
32.  
33. import android.widget.Toast;
34.  
35.  
36. import com.google.android.material.tabs.TabLayout;
37.  
38.  
39. import java.util.ArrayList;
40.  
41. import java.util.jar.Manifest;
42.  
43.  
44. public class MainActivity extends AppCompatActivity {
45.  
46.     public static final int REQUEST_CODE=1;
47.  
48.     ArrayList<MusicFiles>musicFiles;
49.  
50.     [USER=1021285]@override[/USER]
51.  
52.     protected void onCreate(Bundle savedInstanceState) {
53.  
54.         super.onCreate(savedInstanceState);
55.  
56.         setContentView(R.layout.activity_main);
57.  
58.         permission();
59.  
60.         initViewpager();
61.  
62.     }
63.  
64.  
65.     private void permission() {
66.  
67.         if(ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE)
68.  
69.         != PackageManager.PERMISSION_GRANTED) {
70.  
71.             ActivityCompat.requestPermissions(MainActivity.this, new String[]{
72.  
73.                             Manifest.permission.WRITE_EXTERNAL_STORAGE}
74.  
75.                     , REQUEST_CODE);
76.  
77.         }
78.  
79.                 else
80.  
81.         {
82.  
83.             Toast.makeText(this, "Permission Granted!", Toast.LENGTH_SHORT).show();
84.  
85.             musicFiles = getAllAudio(this);
86.  
87.         }
88.  
89.     }
90.  
91.     [USER=1021285]@override[/USER]
92.  
93.         public void onRequestPermissionsResult (int requestCode,@NonNull String[]permissions,
94.  
95.                                                 @NonNull int[] grantResults){
96.  
97.         super.onRequestPermissionsResult(requestCode,permissions,grantResults);
98.  
99.         if (requestCode==REQUEST_CODE)
100.  
101.         {
102.  
103.             if(grantResults[0] == PackageManager.PERMISSION_GRANTED){
104.  
105.                 {
106.  
107.                   //Do whatever you want permission related
108.  
109.                     Toast.makeText(this, "Permission Granted !", Toast.LENGTH_SHORT).show();
110.  
111.                     musicFiles =getAllAudio(this);
112.  
113.  
114.                 }
115.  
116.                 else
117.  
118.                 {
119.  
120.                     ActivityCompat.requestPermissions(MainActivity.this, new String []{Manifest.permission.WRITE_EXTERNAL_STORAGE,
121.  
122.                             REQUEST_CODE);
123.  
124.                     }
125.  
126.                     }
127.  
128.             }
129.  
130.  
131.     private void initViewpager(){
132.  
133.         ViewPager viewPager =findViewById(R.id.viewpager);
134.  
135.         TabLayout tabLayout = findViewById(R.id.tab_layout);
136.  
137.         ViewpagerAdapter viewPagerAdapter = new ViewpagerAdapter(getSupportFragmentManager());
138.  
139.         viewPagerAdapter.addFragments(new SongsFragment(), "Songs");
140.  
141.         viewPagerAdapter.addFragments(new AlbumFragment(),"Album");
142.  
143.         viewPager.setAdapter(viewPagerAdapter);
144.  
145.         tabLayout.setupWithViewPager(viewPager);
146.  
147.     }
148.  
149.     public static class ViewpagerAdapter extends FragmentPagerAdapter{
150.  
151.  
152.         private ArrayList<Fragment> fragments;
153.  
154.         private ArrayList<String> titles;
155.  
156.         public ViewpagerAdapter (@NonNull FragmentManager fm){
157.  
158.             super(fm);
159.  
160.             this.fragments = new ArrayList<>();
161.  
162.             this.titles = new ArrayList<>();
163.  
164.         }
165.  
166.         void addFragments (Fragment fragment, String title){
167.  
168.             fragments.add(fragment);
169.  
170.             titles.add(title);
171.  
172.  
173.         }
174.  
175.  
176.         @NonNull
177.  
178.         [USER=1021285]@override[/USER]
179.  
180.         public Fragment getItem (int position){
181.  
182.             return fragments.get(position);
183.  
184.         }
185.  
186.         [USER=1021285]@override[/USER]
187.  
188.         public int getCount(){
189.  
190.             return fragments.size();
191.  
192.         }
193.  
194.  
195.         [USER=1996173]@nullable[/USER]
196.  
197.         [USER=1021285]@override[/USER]
198.  
199.         public CharSequence getPageTitle(int position){
200.  
201.             return titles.get(position);
202.  
203.         }
204.  
205.     }
206.  
207. }
208.  
209.     }
210.  
211. }
212.  
213. public static ArrayList <cMusicFiles> getAllAudio(Context context){
214.  
215.   ArrayList<MusicFiles> tempAudioList = new ArrayList<>();
216.  
217.     Uri uri= MediaStore.Audio.EXTERNAL_CONTENT_URI;
218.  
219.     String[] projection = (
220.  
221.             MediaStore.Audio.Media.ALBUM,
222.  
223.             MediaStore.Audio.Media.TITLE,
224.  
225.             MediaStore.Audio.Media.DURATION,
226.  
227.             MediaStore.Audio.Media.DATA, // FOR PATH
228.  
229.             MediaStore.Audio.Media.ARTIST,
230.  
231. };
232.  
233.         Cursor cursor = context.getContentResolver().query(uri, projection, null,null,null);
234.  
235.         if (cursor!=null)
236.  
237.                 {
238.  
239.                 while(cursor.moveToNext())
240.  
241.                 {
242.  
243.                 String album = cursor.getString(0);
244.  
245.                 String title = cursor.getString(1);
246.  
247.                 String duration = cursor.getString(2);
248.  
249.                 String path = cursor.getString(3);
250.  
251.                 String artist = cursor.getString(4);
252.  
253.  
254.                 MusicFiles musicFiles = new MusicFiles(path, title,artist,album,duration);
255.  
256.                 //take log.e for check
257.  
258.                 Log.e("Path: " + path, "Album : " + album);
259.  
260.                 tempAudioList.add(musicFiles)
261.  
262.                     }
263.  
264.                 cursor.close();
265.  
266.                  }
267.  
268.         return tempAudioList;
269.  
270.                 }
271.  
272.                 }

AndroidManifest.xml

Code (Text):

1. <?xml version="1.0" encoding="utf-8"?>
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
3.     package="com.example.musicaudioplayer">
4.     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
5.     <application
6.         android:allowBackup="true"
7.         android:icon="[USER=22138]@Mipmap[/USER]/ic_launcher"
8.         android:label="[USER=696546]@String[/USER]/app_name"
9.         android:roundIcon="[USER=22138]@Mipmap[/USER]/ic_launcher_round"
10.         android:supportsRtl="true"
11.         android:theme="[USER=19691]@Style[/USER]/AppTheme">
12.         <activity android:name=".MainActivity">
13.             <intent-filter>
14.                 <action android:name="android.intent.action.MAIN" />
15.  
16.                 <category android:name="android.intent.category.LAUNCHER" />
17.             </intent-filter>
18.         </activity>
19.     </application>
20.  
21. </manifest>

AlbumFragment.java

Code (Java):

1. package com.example.musicaudioplayer;
2.  
3. import android.os.Bundle;
4.  
5. import androidx.fragment.app.Fragment;
6.  
7. import android.view.LayoutInflater;
8. import android.view.View;
9. import android.view.ViewGroup;
10.  
11.  
12. /**
13. * A simple {@link Fragment} subclass.
14. */
15. public class AlbumFragment extends Fragment {
16.  
17.     public AlbumFragment() {
18.         // Required empty public constructor
19.     }
20.  
21.  
22.     [USER=1021285]@override[/USER]
23.     public View onCreateView(LayoutInflater inflater, ViewGroup container,
24.                              Bundle savedInstanceState) {
25.         // Inflate the layout for this fragment
26.         View view = inflater.inflate(R.layout.fragment_album, container, false);
27.         return view;
28.     }
29. }

MusicFiles.java

Code (Java):

1. package com.example.musicaudioplayer;
2.  
3. public class MusicFiles {
4.     private String path;
5.     private String title;
6.     private String artist;
7.     private String album;
8.     private String duration;
9.  
10.     public MusicFiles(String path, String title, String artist, String album, String duration) {
11.         this.path = path;
12.         this.title = title;
13.         this.artist = artist;
14.         this.album = album;
15.         this.duration = duration;
16.     }
17.  
18.     public MusicFiles() {
19.     }
20.  
21.     public String getPath() {
22.         return path;
23.     }
24.  
25.     public void setPath(String path) {
26.         this.path = path;
27.     }
28.  
29.     public String getTitle() {
30.         return title;
31.     }
32.  
33.     public void setTitle(String title) {
34.         this.title = title;
35.     }
36.  
37.     public String getArtist() {
38.         return artist;
39.     }
40.  
41.     public void setArtist(String artist) {
42.         this.artist = artist;
43.     }
44.  
45.     public String getAlbum() {
46.         return album;
47.     }
48.  
49.     public void setAlbum(String album) {
50.         this.album = album;
51.     }
52.  
53.     public String getDuration() {
54.         return duration;
55.     }
56.  
57.     public void setDuration(String duration) {
58.         this.duration = duration;
59.     }
60. }

fragment_album.xml

Code (Text):

1. <?xml version="1.0" encoding="utf-8"?>
2. <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
3.     xmlns:tools="http://schemas.android.com/tools"
4.     android:layout_width="match_parent"
5.     android:layout_height="match_parent"
6.     tools:context=".AlbumFragment">
7.  
8.     <!-- TODO: Update blank fragment layout -->
9.     <TextView
10.         android:layout_width="match_parent"
11.         android:layout_height="match_parent"
12.         android:text="[USER=696546]@String[/USER]/hello_blank_fragment" />
13.  
14. </FrameLayout>

SongsFragment.java

Code (Java):

1. package com.example.musicaudioplayer;
2.  
3. import android.os.Bundle;
4.  
5. import androidx.fragment.app.Fragment;
6.  
7. import android.view.LayoutInflater;
8. import android.view.View;
9. import android.view.ViewGroup;
10.  
11.  
12. /**
13. * A simple {@link Fragment} subclass.
14. */
15. public class SongsFragment extends Fragment {
16.  
17.     public SongsFragment() {
18.         // Required empty public constructor
19.     }
20.  
21.  
22.     [USER=1021285]@override[/USER]
23.     public View onCreateView(LayoutInflater inflater, ViewGroup container,
24.                              Bundle savedInstanceState) {
25.         // Inflate the layout for this fragment
26.         View view =inflater.inflate(R.layout.fragment_songs, container, false);
27.         return view;
28.     }
29. }

fragment_songs.xml

Code (Text):

1. <?xml version="1.0" encoding="utf-8"?>
2. <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
3.     xmlns:tools="http://schemas.android.com/tools"
4.     android:layout_width="match_parent"
5.     android:layout_height="match_parent"
6.     tools:context=".SongsFragment">
7.  
8.     <!-- TODO: Update blank fragment layout -->
9.     <TextView
10.         android:layout_width="match_parent"
11.         android:layout_height="match_parent"
12.         android:text="[USER=696546]@String[/USER]/hello_blank_fragment" />
13.  
14. </FrameLayout>

Ps.: I send also the ZIP file about the audio music player app, My Android version is below:





Another trouble is the emulator that in my pc doesn´t work, i think it´s because my Pc doesn´t have the Intel processor but the AMD Processor. Could you help to fix this problem too? see the images







Could anyone, help me, please to fix this problems?

I expect your answer as soon as possible.

Best regards

José Moreira