[JAVA] The road to creating a music game 3
Synopsis up to the last time and the results of this time
Until the last time, I was able to create a metronome and shake the terminal left and right to make a sound. From there, I created a simple music player with the intention of adding BGM, so I will describe the layout and source code below.
Layout
activiti_main.xml
<SeekBar
android:id="@+id/Time_Seek"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="75dp"
android:layout_marginLeft="75dp"
android:layout_marginEnd="75dp"
android:layout_marginRight="75dp"
android:layout_marginBottom="250dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/Time_text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="75dp"
android:layout_marginLeft="75dp"
android:layout_marginTop="4dp"
android:text="0:00"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/Time_Seek" />
<TextView
android:id="@+id/Time_text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:layout_marginEnd="75dp"
android:layout_marginRight="75dp"
android:text="- 0:00"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="@+id/Time_Seek" />
<SeekBar
android:id="@+id/Volume_seek"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="75dp"
android:layout_marginLeft="75dp"
android:layout_marginEnd="75dp"
android:layout_marginRight="75dp"
android:layout_marginBottom="50dp"
android:max="100"
android:progress="50"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<ImageView
android:id="@+id/imageView"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginEnd="10dp"
android:layout_marginRight="10dp"
android:layout_marginBottom="38dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/Volume_seek"
app:srcCompat="@drawable/sound" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginStart="10dp"
android:layout_marginLeft="10dp"
android:layout_marginBottom="38dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="@+id/Volume_seek"
app:srcCompat="@drawable/sound2" />
<Button
android:id="@+id/Music_button"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_marginStart="150dp"
android:layout_marginLeft="150dp"
android:layout_marginTop="50dp"
android:layout_marginEnd="150dp"
android:layout_marginRight="150dp"
android:layout_marginBottom="50dp"
android:background="@drawable/play"
app:layout_constraintBottom_toTopOf="@+id/Volume_seek"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/Time_Seek" />
<Button
android:id="@+id/beat1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="75dp"
android:layout_marginLeft="75dp"
android:layout_marginEnd="75dp"
android:layout_marginRight="75dp"
android:layout_marginBottom="75dp"
app:layout_constraintBottom_toTopOf="@+id/Time_Seek"
app:layout_constraintEnd_toStartOf="@+id/beat2"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/beat2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="75dp"
android:layout_marginLeft="75dp"
android:layout_marginEnd="75dp"
android:layout_marginRight="75dp"
android:layout_marginBottom="75dp"
app:layout_constraintBottom_toTopOf="@+id/Time_Seek"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/beat1" />
Source code
MainActivity.java
public class MainActivity extends AppCompatActivity {
private MediaPlayer mp;
private Button m_but,b_but1,b_but2;
private SeekBar v_bar,m_bar;
private TextView s_text,e_text;
private int m_time;
SoundPool soundPool;
int mp3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
m_but = findViewById(R.id.Music_button);
b_but1 = findViewById(R.id.beat1);
b_but2 = findViewById(R.id.beat2);
s_text = findViewById(R.id.Time_text1);
e_text = findViewById(R.id.Time_text2);
//Loading a song
mp = MediaPlayer.create(this,R.raw.impact);
mp.setLooping(true);
mp.setVolume(1f,1f);
m_time = mp.getDuration();
//The one you need to add sound effects
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
soundPool = new SoundPool(5, AudioManager.STREAM_MUSIC, 0);
} else {
AudioAttributes attr = new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_MEDIA)
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.build();
soundPool = new SoundPool.Builder()
.setAudioAttributes(attr)
.setMaxStreams(5)
.build();
}
mp3 = soundPool.load(this, R.raw.pop, 1);
m_bar = findViewById(R.id.Time_Seek);
m_bar.setMax(m_time);
m_bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if(fromUser){
mp.seekTo(progress);
m_bar.setProgress(progress);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
v_bar = findViewById(R.id.Volume_seek);
v_bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
float v_num = progress / 100f;
mp.setVolume(v_num,v_num);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
//Play button control
m_but.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(mp.isPlaying()){
mp.pause();
m_but.setBackgroundResource(R.drawable.play);
}
else {
mp.start();
m_but.setBackgroundResource(R.drawable.stop);
}
}
});
b_but1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundPool.play(mp3, 2, 2, 0, 0, 1f);
}
});
b_but2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundPool.play(mp3, 2, 2, 0, 0, 1f);
}
});
new Thread(new Runnable() {
@Override
public void run() {
while (mp !=null){
try {
Message msg = new Message();
msg.what = mp.getCurrentPosition();
handler .sendMessage(msg);
Thread.sleep(1000);
} catch (InterruptedException e){}
}
}
}).start();
}
private Handler handler =new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
int currentPosition = msg.what;
//Update playback position
m_bar.setProgress(currentPosition);
//Elapsed time label update
String elapsedTime = createTimeLabel(currentPosition);
s_text.setText(elapsedTime);
//Remaining time label update
String remainingTime = "- " + createTimeLabel(m_time-currentPosition);
e_text.setText(remainingTime);
return true;
}
});
public String createTimeLabel(int time) {
String timeLabel = "";
int min = time / 1000 / 60;
int sec = time / 1000 % 60;
timeLabel = min + ":";
if (sec < 10) timeLabel += "0";
timeLabel += sec;
return timeLabel;
}
}
Good luck this time
It's been a while since the last time, but it's quite difficult to create a simple music player, the music doesn't play, it's good to play, but when it's paused, the music doesn't play, or the music stops. At the same time, the app will stop ... I think that it was quite difficult, but what was the cause was that the contents of mp were null when it stopped, so I thought that it caused some error when playing it again. I am. I'm sorry if I made a mistake m (_ _) m By the way, many people think that the two blank buttons on the layout are strange, but when you press them, you will hear a sound effect! ... eh? What else? ・ ・ ・ that's all.
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