你如何每6-10秒重复一次声音,这意味着一个6到10之间的随机间隔?那么声音会播放6,然后是7,6,10等?到目前为止,我有这个,它按照我想要的方式工作并播放声音“一次”并更改屏幕上的按钮。但是要再次播放声音,我必须单击按钮“停止”然后再次单击“开始”。我想按下然后按钮并让声音每6-10秒重复一次,直到你按下停止按钮......
public class MainActivity extends ActionBarActivity {
MediaPlayer myMediaPlayer = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final MediaPlayer myMediaPlayer = MediaPlayer.create(this, R.raw.whistle);
Timer soundTimer = new Timer();
Random r = new Random();
//Button related to play btn
final Button startStopButton = (Button) findViewById(R.id.startstopbutton);
startStopButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (startStopButton.getText().equals("Start")) {
//start the sound
//change button color and text
startStopButton.setText("Stop");
startStopButton.setBackgroundColor(Color.RED);
myMediaPlayer.start();
} else {
//stop whistle
//change button color and text
startStopButton.setText("Start");
startStopButton.setBackgroundColor(Color.GREEN);
}
}
});
}
答案 0 :(得分:1)
您可以像这样获得6到10之间的随机数:
int max = 10;
int min = 6;
int randomNum = new Random().nextInt((max - min) + 1) + min;
int seconds = randomNum * 1000;
以下是每6到10秒播放声音的示例:
private final Random mRandom = new Random();
private final Handler mHandler = new Handler();
private MediaPlayer mPlayer;
private boolean mKeepPlaying = true;
private void playMySound() {
if (mPlayer == null) {
mPlayer = MediaPlayer.create(this, R.raw.whistle);
}
int delayMillis = 1000 * mRandom.nextInt(5) + 6; // random number between 6 and 10
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
if (isFinishing()) {
// Check if the Activity is finishing.
return;
}
mPlayer.start();
if (mKeepPlaying) {
// play the sound again in 6 to 10 seconds
playMySound();
}
}
}, delayMillis);
}
只需在playMySound();
中拨打onCreate(Bundle)
,然后在您想要停止时切换mKeepPlaying
。
答案 1 :(得分:0)
您可以使用MediaPlayer.OnCompletionListener来完成此操作,每当播放完成时,获取一个介于6和10之间的随机数,并发布一个runnable,以便在计算出的随机时间后再次开始播放。
这是一个这样做的例子。
public class MainActivity extends Activity {
Button button1;
MediaPlayer mediaPlayer = null;
private final Random mRandom = new Random();
int delayMillis;
Handler handler;
Runnable runnable;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1 = (Button) findViewById(R.id.button1);
handler = new Handler();
runnable = new Runnable() {
@Override
public void run() {
mediaPlayer.start();
}
};
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
toggleMediaPlayer();
}
});
}
private void toggleMediaPlayer(){
if(mediaPlayer != null){
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer=null;
handler.removeCallbacks(runnable);
}else{
mediaPlayer = MediaPlayer.create(this, R.raw.hangouts_incoming_call);
mediaPlayer.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
mp.start();
}
});
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
delayMillis = 1000 * mRandom.nextInt(5) + 6;
handler.postDelayed(runnable,delayMillis);
}
});
}
}}
希望这有帮助。