我必须实现应用程序来创建具有暂停和恢复状态的音频，当我的应用程序作为启动时音频开始，当我按下模拟器上的后退按钮时，音频音乐处于暂停状态但是当我的活动回来时从停止状态到前台我的音频音乐没有恢复。这是我的代码。
public class Audio_Activity extends Activity
{
private MediaPlayer mp;
Button btnStartStop ;
Button btnChapter ;
Button btnOne;
Button btnTwo;
Button btnThree;
Button btnFour;
Button btnFive;
int length;
ImageView imgVw;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.audio);
init();
mp=MediaPlayer.create(Audio_Activity.this,R.raw.ennamo_yadho);
Log.e("Song is playing","in Mediya Player ");
if(mp!=null)
{
mp.setLooping(false);
mp.start();
btnChapter.setEnabled(false);
System.out.println("B4 button Click!!!!");
}
mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener()
{
@Override
public void onCompletion(MediaPlayer mp)
{
mp.stop();
mp.release();
btnChapter.setEnabled(true);
System.out.println("Music is over and Button is enable !!!!!!");
}
});
btnStartStop.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View arg0)
{
if(mp.isPlaying())
{
if(mp!=null)
{
mp.pause();
}
}
else
{
// Resume song
if(mp!=null)
{
mp.start();
}
}
}
});
btnOne.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
imgVw.setImageResource(R.raw.chocklate);
}
}
);
btnTwo.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
imgVw.setImageResource(R.raw.creame);
}
});
btnThree.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
imgVw.setImageResource(R.raw.schocklate);
}
});
btnFour.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
imgVw.setImageResource(R.raw.pinapple);
}
});
btnFive.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
imgVw.setImageResource(R.raw.strobery);
}
});
}
@Override
protected void onResume()
{
super.onResume();
System.out.println("Activity is Resume !!!");
}
@Override
protected void onStart()
{
super.onStart();
System.out.println("Activity is Started !!!");
}
@Override
protected void onRestart() {
super.onRestart();
System.out.println("Activity is Re-Started !!!");
if(mp.isPlaying())
{
if(mp!=null)
{
length=mp.getCurrentPosition();
mp.seekTo(length);
mp.start();
}
}
}
@Override
protected void onPause() {
super.onPause();
System.out.println("Activity is Pause!!!");
}
@Override
protected void onStop() {
super.onStop();
System.out.println("Activity is Stop !!!");
}
@Override
protected void onDestroy() {
super.onDestroy();
System.out.println("Activity is Destroyed !!!");
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if ((keyCode == KeyEvent.KEYCODE_BACK))
{ //Back key pressed
//Things to Do
if(mp!= null)
{
if(mp.isPlaying())
{
mp.pause();
//mp=null;
}
}
finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
}