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私は、ランダムなノートを選択して再生する配列を持っています。私がしたいのは、コードがチェックして、ランダムに選ばれたものと同じ音符であるかどうかを確認するピアノ・キーをダブルクリックしたときです。アンドロイドのランダムなノートを確認する
ここでは、コードです：
package com.stefanawesome.piano;
import android.content.pm.ActivityInfo; import
android.media.AudioManager; import android.media.MediaPlayer; import
android.media.SoundPool; import android.os.Build; import
android.provider.ContactsContract; import
android.support.v7.app.AppCompatActivity; import android.os.Bundle;
import android.view.View; import android.widget.Button; import
android.widget.ImageButton; import android.widget.TextView;
import java.util.ArrayList; import java.util.List; import
java.util.Random;
public class MainActivity extends AppCompatActivity {
//Declaring variables and array:
ImageButton NoteNew;
ImageButton Repeat;
Button c, d, e, f, g, a, b, high;
List<Integer> soundList = new ArrayList<Integer>();
private SoundPool soundpool;
private int sound_c, sound_d, sound_e, sound_f, sound_g, sound_a, sound_b, sound_high;
//Random Note Function:
int last;
private void playRandomSound() {
int randomInt = (new Random().nextInt(soundList.size()));
last=randomInt;
int rSound = soundList.get(randomInt);
MediaPlayer mp = MediaPlayer.create(this, rSound);
mp.start();
}
//Repeat Note
private void playlastRandomSound() {
int rSound = soundList.get(last);
MediaPlayer mp = MediaPlayer.create(this, rSound);
mp.start();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
//Find View by ID all here:
soundList.add(R.raw.c);
soundList.add(R.raw.d);
soundList.add(R.raw.e);
soundList.add(R.raw.f);
soundList.add(R.raw.g);
soundList.add(R.raw.a);
soundList.add(R.raw.b);
soundList.add(R.raw.chigh);
NoteNew = (ImageButton) findViewById(R.id.Newnote);
Repeat = (ImageButton) findViewById(R.id.Repeat);
c = (Button) findViewById(R.id.C);
d = (Button) findViewById(R.id.D);
e = (Button) findViewById(R.id.E);
f = (Button) findViewById(R.id.F);
g = (Button) findViewById(R.id.G);
a = (Button) findViewById(R.id.A);
b = (Button) findViewById(R.id.B);
high = (Button) findViewById(R.id.high);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
soundpool = new SoundPool.Builder().setMaxStreams(5).build();
} else {
soundpool = new SoundPool(5, AudioManager.STREAM_MUSIC, 0);
}
//Soundpools over here:
sound_c = soundpool.load(this, R.raw.c, 1);
sound_d = soundpool.load(this, R.raw.d, 1);
sound_e = soundpool.load(this, R.raw.e, 1);
sound_f = soundpool.load(this, R.raw.f, 1);
sound_g = soundpool.load(this, R.raw.g, 1);
sound_a = soundpool.load(this, R.raw.a, 1);
sound_b = soundpool.load(this, R.raw.b, 1);
sound_high = soundpool.load(this, R.raw.chigh, 1);
//When button gets clicked do something:
c.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundpool.play(sound_c, 1, 1, 0, 0, 1);
}
});
d.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundpool.play(sound_d, 1, 1, 0, 0, 1);
}
});
e.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundpool.play(sound_e, 1, 1, 0, 0, 1);
}
});
f.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundpool.play(sound_f, 1, 1, 0, 0, 1);
}
});
g.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundpool.play(sound_g, 1, 1, 0, 0, 1);
}
});
a.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundpool.play(sound_a, 1, 1, 0, 0, 1);
}
});
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundpool.play(sound_b, 1, 1, 0, 0, 1);
}
});
high.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
soundpool.play(sound_high, 1, 1, 0, 0, 1);
}
});
NoteNew.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
playRandomSound();
}
});
Repeat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
playlastRandomSound();
}
});
}
}