实验6 在应用程序中播放音频和视频

package com.example.sukodu;

import java.io.File;
import java.io.IOException;

import android.annotation.SuppressLint;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.Toast;
import android.widget.VideoView;

public class HelpActivity extends Activity {

Button btnMusics, btnPause, btnStop, btnLocalmc, btnsermcst, btnsermcsp,btnvedio;
MediaPlayer mplayer = new MediaPlayer();
VideoView vediov;
Intent itse = new Intent();

boolean start = true;
File file;

@SuppressLint({ "NewApi", "CutPasteId" })
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.help);
ActionBar abar = getActionBar();
btnMusics = (Button) findViewById(R.id.help_sourcemusic);
btnPause = (Button) findViewById(R.id.help_pause);
btnsermcst = (Button) findViewById(R.id.help_servermusic);
btnsermcsp = (Button) findViewById(R.id.help_serverstop);
btnStop = (Button) findViewById(R.id.help_stop);
btnLocalmc = (Button) findViewById(R.id.help_localemusic);
vediov=(VideoView) findViewById(R.id.helpVideo);
btnvedio=(Button) findViewById(R.id.help_vedio);
abar.setDisplayShowHomeEnabled(true);
abar.setDisplayHomeAsUpEnabled(true);
btnvedio.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
MediaController mc=new MediaController(HelpActivity.this);
File file=new File(Environment.getExternalStorageDirectory().getPath()+"/aabb.mp4");
vediov.setVideoPath(file.getAbsolutePath());
vediov.setMediaController(mc);
vediov.requestFocus();

vediov.start();

}
});
btnPause.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (mplayer.isPlaying()) {
mplayer.pause();
}
}
});
btnStop.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (mplayer.isPlaying()) {
mplayer.stop();
start = true;
}

}
});
btnLocalmc.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
file = new File(
Environment.getExternalStorageDirectory().getPath()+"/nanshannan.mp3");
try {
mplayer.reset();
mplayer.setDataSource(file.getAbsolutePath());
Toast.makeText(HelpActivity.this, file.getAbsolutePath(),
Toast.LENGTH_LONG).show();

mplayer.prepare();
mplayer.start();

} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
btnMusics.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if (mplayer == null || start) {
mplayer.reset();
mplayer = new MediaPlayer();
mplayer = MediaPlayer.create(HelpActivity.this,
R.raw.nanshannan);
mplayer.start();
start = false;
} else if (mplayer != null) {
mplayer.start();
}
}
});
btnsermcst.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
itse.setClass(HelpActivity.this, MyService.class);
startService(itse);
}
});
btnsermcsp.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
stopService(itse);
}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
getMenuInflater().inflate(R.menu.actionbar, menu);
return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
Intent intent = getIntent();
switch (item.getItemId()) {
case android.R.id.home: {
finish();
break;
}
case R.id.about: {
intent.setClass(this, SecondActivity.class);
startActivity(intent);
finish();
break;
}
case R.id.newgame: {
intent.setClass(this, GamesActivity.class);
startActivity(intent);
finish();
break;
}
default: {
break;
}
}
return super.onOptionsItemSelected(item);
}

@Override
protected void onDestroy() {
// TODO Auto-generated method stub
if (mplayer.isPlaying()) {
mplayer.stop();
}
if(vediov.isPlaying()){
vediov.stopPlayback();
}

super.onDestroy();
}

}

package com.example.sukodu;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.IBinder;

public class MyService extends Service{
MediaPlayer mplayer;
boolean start = true;
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}

@Override
public void onCreate() {
// TODO Auto-generated method stub

mplayer = new MediaPlayer();
mplayer = MediaPlayer.create(this,R.raw.nanshannan);
mplayer.setOnCompletionListener(new OnCompletionListener() {

@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stub

}
});
super.onCreate();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub
mplayer.start();
return super.onStartCommand(intent, flags, startId);
}

public void onDestroy() {
// TODO Auto-generated method stub
mplayer.stop();
super.onDestroy();
}

}