How to Build a MusicPlayer for Android Device
Hi, guys welcome back Once again, In this tutorial I am going discuss about how to build a MusicPlayer for Android device. The Android provides resources for handling media playback, which an apps can use to create an interface between the user and music files, I am going to create basic Music Player for Android . This app basically will read selected Audio file from the list that App present. The App has basic Control like pause, play, previous , next and seekbar . let’s start the Application.
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Prerequisites:
- JDK 7.0 or Above
- Android Studio 2.0
Steps to Follow:
Step 1: Create a New Android Studio project name PlayMusic.Step 2: Select minimum API level 17 so that it can support maximum of Android Device available in the google play.
Step 3: Select Blank Activity and Give your layout xml name is activity_main and click finish.
Step 4:Inside activity_main.xml write the following code
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="com.example.playmusic.MainActivity">
<ListView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@android:id/list"
android:layout_weight="1.0"
/>
<LinearLayout
android:orientation="vertical"
android:background="@android:drawable/screen_background_light"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dp">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="No file Selected"
android:id="@+id/selecteditem"
android:ellipsize="middle"
android:singleLine="true"
android:gravity="center_horizontal"
android:textColor="@android:color/darker_gray"
/>
<SeekBar
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/seekBar"
android:max="100"
android:paddingBottom="10dp"
/>
<LinearLayout
android:orientation="horizontal"
android:background="@android:drawable/screen_background_light"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/previous"
android:src ="@android:drawable/ic_media_previous"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/play"
android:src ="@android:drawable/ic_media_play"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/next"
android:src ="@android:drawable/ic_media_next"
/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="com.example.playmusic.MainActivity">
<ListView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@android:id/list"
android:layout_weight="1.0"
/>
<LinearLayout
android:orientation="vertical"
android:background="@android:drawable/screen_background_light"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dp">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="No file Selected"
android:id="@+id/selecteditem"
android:ellipsize="middle"
android:singleLine="true"
android:gravity="center_horizontal"
android:textColor="@android:color/darker_gray"
/>
<SeekBar
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/seekBar"
android:max="100"
android:paddingBottom="10dp"
/>
<LinearLayout
android:orientation="horizontal"
android:background="@android:drawable/screen_background_light"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/previous"
android:src ="@android:drawable/ic_media_previous"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/play"
android:src ="@android:drawable/ic_media_play"
/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/next"
android:src ="@android:drawable/ic_media_next"
/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
Step 5: within layout folder create a new resource file item.xml and write the following code inside it.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="New Text"
android:ellipsize="end"
android:singleLine="true"
android:textSize="20dp"
android:id="@+id/displayname" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:ellipsize="end"
android:singleLine="true"
android:text="New Text"
android:textSize="18dp"
android:id="@+id/title" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:singleLine="true"
android:gravity="right"
android:textSize="18dp"
android:id="@+id/duration" />
</LinearLayout>
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="New Text"
android:ellipsize="end"
android:singleLine="true"
android:textSize="20dp"
android:id="@+id/displayname" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1.0"
android:ellipsize="end"
android:singleLine="true"
android:text="New Text"
android:textSize="18dp"
android:id="@+id/title" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:singleLine="true"
android:gravity="right"
android:textSize="18dp"
android:id="@+id/duration" />
</LinearLayout>
</LinearLayout>
Step 6: Inside the manifest.xml write the following code
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
Step 7. Inside MainActivity.java write the following code.
public class MainActivity extends ListActivity {
private static final int UPDATE_FREQUENCY = 500;
private static final int STEP_VALUE = 4000;
private TextView selectedfile = null;
private SeekBar seekBar = null;
private MediaPlayer player = null;
private ImageButton prev = null;
private ImageButton play = null;
private ImageButton next = null;
private MediaCursorAdapter adapter = null;
private boolean isStarted = true;
private String currentFile = "";
private boolean isMovingSeekBar = false;
private final Handler handler = new Handler();
private final Runnable updatePositinRunnable = new Runnable() {
@Override
public void run() {
updatePosition();
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
selectedfile = (TextView)findViewById(R.id.selecteditem);
seekBar =(SeekBar)findViewById(R.id.seekBar);
prev = (ImageButton)findViewById(R.id.previous);
play = (ImageButton)findViewById(R.id.play);
next = (ImageButton)findViewById(R.id.next);
player = new MediaPlayer();
player.setOnCompletionListener(onCompletion);
player.setOnErrorListener(onError);
seekBar.setOnSeekBarChangeListener(seekBarChanged);
Cursor cursor = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null,null,null,null);
if(null!= cursor){
cursor.moveToFirst();
adapter = new MediaCursorAdapter(this,R.layout.item ,cursor);
setListAdapter(adapter);
prev.setOnClickListener(OnButtonClick);
play.setOnClickListener(OnButtonClick);
next.setOnClickListener(OnButtonClick);
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
currentFile = (String) v.getTag();
startPlay(currentFile);
}
private void startPlay(String file) {
Log.i("Selected: ", file);
selectedfile.setText(file);
seekBar.setProgress(0);
player.stop();
player.reset();
try{
player.setDataSource(file);
player.prepare();
player.start();
}catch (IllegalArgumentException e){
e.printStackTrace();
}catch(IllegalStateException e){
e.printStackTrace();
}catch (IOException e){
e.printStackTrace();
}
seekBar.setMax(player.getDuration());
play.setImageResource(android.R.drawable.ic_media_pause);
updatePosition();
isStarted = true;
}
private void stopPlay(){
player.stop();
player.reset();
play.setImageResource(android.R.drawable.ic_media_play);
handler.removeCallbacks(updatePositinRunnable);
seekBar.setProgress(0);
isStarted = false;
}
@Override
protected void onDestroy() {
super.onDestroy();
handler.removeCallbacks(updatePositinRunnable);
player.stop();
player.reset();
player.release();
player = null;
}
private void updatePosition() {
handler.removeCallbacks(updatePositinRunnable);
seekBar.setProgress(player.getCurrentPosition());
handler.postDelayed(updatePositinRunnable,UPDATE_FREQUENCY);
}
private View.OnClickListener OnButtonClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.play:{
if(player.isPlaying()){
handler.removeCallbacks(updatePositinRunnable);
player.pause();
play.setImageResource(android.R.drawable.ic_media_play);
}else{
if(isStarted){
player.start();
play.setImageResource(android.R.drawable.ic_media_pause);
updatePosition();
}else{
startPlay(currentFile);
}
}
break;
}
case R.id.next:{
int seekto = player.getCurrentPosition()+ STEP_VALUE;
if(seekto >player.getDuration())
seekto =player.getDuration();
player.pause();
player.seekTo(seekto);
player.start();
break;
}
case R.id.previous:{
int seekto = player.getCurrentPosition()- STEP_VALUE;
if(seekto <0)
seekto = 0;
player.pause();
player.seekTo(seekto);
player.start();
break;
}
}
}
};
private MediaPlayer.OnCompletionListener onCompletion = new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
stopPlay();
};
};
private MediaPlayer.OnErrorListener onError = new MediaPlayer.OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
return false;
}
};
private SeekBar.OnSeekBarChangeListener seekBarChanged = new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if(isMovingSeekBar){
player.seekTo(progress);
Log.i("OnSeekBarChangeListener","OnProgressChanged");
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
isMovingSeekBar = true;
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
isMovingSeekBar = false;
}
};
}
private static final int UPDATE_FREQUENCY = 500;
private static final int STEP_VALUE = 4000;
private TextView selectedfile = null;
private SeekBar seekBar = null;
private MediaPlayer player = null;
private ImageButton prev = null;
private ImageButton play = null;
private ImageButton next = null;
private MediaCursorAdapter adapter = null;
private boolean isStarted = true;
private String currentFile = "";
private boolean isMovingSeekBar = false;
private final Handler handler = new Handler();
private final Runnable updatePositinRunnable = new Runnable() {
@Override
public void run() {
updatePosition();
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
selectedfile = (TextView)findViewById(R.id.selecteditem);
seekBar =(SeekBar)findViewById(R.id.seekBar);
prev = (ImageButton)findViewById(R.id.previous);
play = (ImageButton)findViewById(R.id.play);
next = (ImageButton)findViewById(R.id.next);
player = new MediaPlayer();
player.setOnCompletionListener(onCompletion);
player.setOnErrorListener(onError);
seekBar.setOnSeekBarChangeListener(seekBarChanged);
Cursor cursor = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null,null,null,null);
if(null!= cursor){
cursor.moveToFirst();
adapter = new MediaCursorAdapter(this,R.layout.item ,cursor);
setListAdapter(adapter);
prev.setOnClickListener(OnButtonClick);
play.setOnClickListener(OnButtonClick);
next.setOnClickListener(OnButtonClick);
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
currentFile = (String) v.getTag();
startPlay(currentFile);
}
private void startPlay(String file) {
Log.i("Selected: ", file);
selectedfile.setText(file);
seekBar.setProgress(0);
player.stop();
player.reset();
try{
player.setDataSource(file);
player.prepare();
player.start();
}catch (IllegalArgumentException e){
e.printStackTrace();
}catch(IllegalStateException e){
e.printStackTrace();
}catch (IOException e){
e.printStackTrace();
}
seekBar.setMax(player.getDuration());
play.setImageResource(android.R.drawable.ic_media_pause);
updatePosition();
isStarted = true;
}
private void stopPlay(){
player.stop();
player.reset();
play.setImageResource(android.R.drawable.ic_media_play);
handler.removeCallbacks(updatePositinRunnable);
seekBar.setProgress(0);
isStarted = false;
}
@Override
protected void onDestroy() {
super.onDestroy();
handler.removeCallbacks(updatePositinRunnable);
player.stop();
player.reset();
player.release();
player = null;
}
private void updatePosition() {
handler.removeCallbacks(updatePositinRunnable);
seekBar.setProgress(player.getCurrentPosition());
handler.postDelayed(updatePositinRunnable,UPDATE_FREQUENCY);
}
private View.OnClickListener OnButtonClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.play:{
if(player.isPlaying()){
handler.removeCallbacks(updatePositinRunnable);
player.pause();
play.setImageResource(android.R.drawable.ic_media_play);
}else{
if(isStarted){
player.start();
play.setImageResource(android.R.drawable.ic_media_pause);
updatePosition();
}else{
startPlay(currentFile);
}
}
break;
}
case R.id.next:{
int seekto = player.getCurrentPosition()+ STEP_VALUE;
if(seekto >player.getDuration())
seekto =player.getDuration();
player.pause();
player.seekTo(seekto);
player.start();
break;
}
case R.id.previous:{
int seekto = player.getCurrentPosition()- STEP_VALUE;
if(seekto <0)
seekto = 0;
player.pause();
player.seekTo(seekto);
player.start();
break;
}
}
}
};
private MediaPlayer.OnCompletionListener onCompletion = new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
stopPlay();
};
};
private MediaPlayer.OnErrorListener onError = new MediaPlayer.OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
return false;
}
};
private SeekBar.OnSeekBarChangeListener seekBarChanged = new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if(isMovingSeekBar){
player.seekTo(progress);
Log.i("OnSeekBarChangeListener","OnProgressChanged");
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
isMovingSeekBar = true;
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
isMovingSeekBar = false;
}
};
}
8. Create a New Class MediaCursorAdapter.java and add the following code inside it.
public class MediaCursorAdapter extends SimpleCursorAdapter{
public MediaCursorAdapter(Context context, int layout, Cursor c) {
super(context, layout, c, new String[]{MediaStore.MediaColumns.DISPLAY_NAME,MediaStore.MediaColumns.TITLE,
MediaStore.Audio.AudioColumns.DURATION},
new int[]{R.id.displayname,R.id.title,R.id.duration});
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView title = (TextView)view.findViewById(R.id.title);
TextView name = (TextView)view.findViewById(R.id.displayname);
TextView duration = (TextView)view.findViewById(R.id.duration);
name.setText(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DISPLAY_NAME)));
title.setText(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.TITLE)));
long durationInMS = Long.parseLong(cursor.getString(cursor.getColumnIndex(MediaStore.Audio.AudioColumns.DURATION)));
double durationInMin = ((double)durationInMS/1000.0)/60.0;
durationInMin = new BigDecimal(Double.toString(durationInMin)).setScale( 2, BigDecimal.ROUND_UP).doubleValue();
duration.setText("" + durationInMin);
view.setTag(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DATA)));
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
LayoutInflater inflater = LayoutInflater.from(context);
View v = inflater.inflate(R.layout.item,parent,false);
bindView(v,context,cursor);
return v;
}
}
public MediaCursorAdapter(Context context, int layout, Cursor c) {
super(context, layout, c, new String[]{MediaStore.MediaColumns.DISPLAY_NAME,MediaStore.MediaColumns.TITLE,
MediaStore.Audio.AudioColumns.DURATION},
new int[]{R.id.displayname,R.id.title,R.id.duration});
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView title = (TextView)view.findViewById(R.id.title);
TextView name = (TextView)view.findViewById(R.id.displayname);
TextView duration = (TextView)view.findViewById(R.id.duration);
name.setText(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DISPLAY_NAME)));
title.setText(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.TITLE)));
long durationInMS = Long.parseLong(cursor.getString(cursor.getColumnIndex(MediaStore.Audio.AudioColumns.DURATION)));
double durationInMin = ((double)durationInMS/1000.0)/60.0;
durationInMin = new BigDecimal(Double.toString(durationInMin)).setScale( 2, BigDecimal.ROUND_UP).doubleValue();
duration.setText("" + durationInMin);
view.setTag(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DATA)));
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
LayoutInflater inflater = LayoutInflater.from(context);
View v = inflater.inflate(R.layout.item,parent,false);
bindView(v,context,cursor);
return v;
}
}
This completes the coding of this basic MusicPlayer application for Android . If you want to improve this application share your thoughts and ask any questain in the comment section below.
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