我是android编程的新手。我有一个媒体播放器的以下代码。当用户按下后退键或进入另一个活动时,声音不会停止。
有什么问题?我有onDestory方法,但我的问题存在!
public class Elementary1Activity extends Activity implements Runnable, OnClickListener, OnSeekBarChangeListener{
private SeekBar seekBar;
private ImageButton startMedia;
private ImageButton pauseMedia;
private MediaPlayer mp;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.elementary1);
AudioControl();
}
public void AudioControl(){
seekBar = (SeekBar) findViewById(R.id.seekBarnew2);
startMedia = (ImageButton) findViewById(R.id.playbuttonnew2);
pauseMedia = (ImageButton) findViewById(R.id.pausebuttonnew2);
seekBar.setOnSeekBarChangeListener(this);
startMedia.setOnClickListener(this);
pauseMedia.setOnClickListener(this);
}
public void run() {
int currentPosition= 0;
int total = mp.getDuration();
while (mp!=null && currentPosition<total) {
try {
Thread.sleep(1000);
currentPosition= mp.getCurrentPosition();
} catch (InterruptedException e) {
return;
} catch (Exception e) {
return;
}
seekBar.setProgress(currentPosition);
}
}
public void onClick(View v) {
pauseMedia.setVisibility(View.VISIBLE);
seekBar.setVisibility(View.VISIBLE);
startMedia.setVisibility(View.INVISIBLE);
if (v.equals(startMedia)) {
if (mp != null && mp.isPlaying()) return;
if(seekBar.getProgress() > 0) {
mp.start();
return;
}
mp = MediaPlayer.create(Elementary1Activity.this, R.raw.e1);
mp.start();
seekBar.setProgress(0);
seekBar.setMax(mp.getDuration());
new Thread(this).start();
}
if (v.equals(pauseMedia) && mp!=null) {
mp.pause();
pauseMedia.setVisibility(View.INVISIBLE);
startMedia.setVisibility(View.VISIBLE);
}
}
@Override
public void onDestroy() {
super.onStop();
mp= MediaPlayer.create(Elementary1Activity.this,R.raw.e1);
if(mp.isPlaying())
{
mp.stop();
mp.release();
finish();
}
}
public void onStartTrackingTouch(SeekBar seekBar) {
}
public void onStopTrackingTouch(SeekBar seekBar) {
}
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
if(fromUser) mp.seekTo(progress);
}
}
答案 0 :(得分:1)
我会在你的Elementary1Activity中使用onPause()事件来管理音乐暂停。
类似的东西:
@Override
public void onPause() {
super.onPause();
if (mp!=null) {
mp.pause();
}
}
答案 1 :(得分:0)
你可以做两件事。如果您希望MediaPlayer在按下按钮时停止,并且您想关闭应用程序,则最佳选择是:
@Override
public void onDestroy(){
if(mp != null){
if(mp.isPlaying()){
mp.stop
}
mp.release();
}
super.onDestroy();
}
如果您想在更改活动时停止MediaPlayer:
@Override
public void onPause(){
if (mp != null && mp.isPlaying()){
mp.pause();
}
}
除此之外,当您想要关闭应用时,请不要创建新的MediaPlayer。