20、网络播放器

来源：互联网发布：足球彩票哪个软件好编辑：程序博客网时间：2024/05/06 01:11

---------------------------------------main.java------------------------

package com.example.okk;

import java.io.File;
import java.io.IOException;
import java.util.Timer;
import java.util.TimerTask;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

private EditText et_path;
private MediaPlayer mediaPlayer;

private Button bt_play,bt_pause,bt_stop,bt_replay;

private SurfaceView sv;
private SurfaceHolder holder;

private int position;
private String filepath;

private SeekBar seekBar1;

private Timer timer;
private TimerTask task;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_path = (EditText) findViewById(R.id.et_path);
bt_play = (Button) findViewById(R.id.bt_play);
bt_pause = (Button) findViewById(R.id.bt_pause);
bt_stop = (Button) findViewById(R.id.bt_stop);
bt_replay = (Button) findViewById(R.id.bt_replay);

seekBar1 = (SeekBar) findViewById(R.id.seekBar1);
seekBar1.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
int postion = seekBar.getProgress();
mediaPlayer.seekTo(postion);
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {

}
});

//得到surfaceview
sv = (SurfaceView) findViewById(R.id.sv);
//得到显示界面内容的容器
holder = sv.getHolder();
//在低版本模拟器上运行记得加上下面的参数。不自己维护双缓冲区，而是等待多媒体播放框架主动的推送数据。
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
holder.addCallback(new Callback() {

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
System.out.println("destoryed");
if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
position = mediaPlayer.getCurrentPosition();
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
timer.cancel();
task.cancel();
timer = null;
task = null;
}
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
System.out.println("created");
if(position>0){//记录的有播放进度。
try {
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(filepath);//设置播放的数据源。
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDisplay(holder);
mediaPlayer.prepare();//准备开始播放播放的逻辑是c代码在新的线程里面执行。
mediaPlayer.start();
mediaPlayer.seekTo(position);
bt_play.setEnabled(false);
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
bt_play.setEnabled(true);
}
});
int max = mediaPlayer.getDuration();
seekBar1.setMax(max);
timer = new Timer();
task = new TimerTask() {
@Override
public void run() {
seekBar1.setProgress(mediaPlayer.getCurrentPosition());
}
};
timer.schedule(task, 0, 500);
} catch (IOException e) {
e.printStackTrace();
}
}
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
System.out.println("changed");
}
});

}
/**
* 播放
* @param view
*/
public void play(View view) {
filepath = et_path.getText().toString().trim();
//①本地播放器则为File file = new File(filepath);
if(filepath.startsWith("http://")){
try {
mediaPlayer = new MediaPlayer();
//②本地播放器的写法mediaPlayer.setDataSource(file);
mediaPlayer.setDataSource(filepath);//设置播放的数据源。
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setDisplay(holder);
mediaPlayer.prepare();//准备开始播放播放的逻辑是c代码在新的线程里面执行。
mediaPlayer.start();
//设置拖动进度条的最大值
int max = mediaPlayer.getDuration();
seekBar1.setMax(max);
timer = new Timer();
task = new TimerTask() {
@Override
public void run() {
seekBar1.setProgress(mediaPlayer.getCurrentPosition());
}
};
timer.schedule(task, 0, 500);

bt_play.setEnabled(false);
mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
bt_play.setEnabled(true);
}
});
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(this, "播放失败", 0).show();
}
}else{
Toast.makeText(this, "文件不存在，请检查文件的路径", 0).show();
}
}
/**
* 暂停
* @param view
*/
public void pause(View view) {
if("继续".equals(bt_pause.getText().toString())){
mediaPlayer.start();
bt_pause.setText("暂停");
return;
}
if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
mediaPlayer.pause();
bt_pause.setText("继续");
}
}
/**
* 停止
* @param view
*/
public void stop(View view) {
if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
mediaPlayer.stop();
mediaPlayer.release();
mediaPlayer = null;
}
bt_pause.setText("暂停");
bt_play.setEnabled(true);
}
/**
* 重播
* @param view
*/
public void replay(View view) {
if(mediaPlayer!=null&&mediaPlayer.isPlaying()){
mediaPlayer.seekTo(0);
}else{
play(view);
}
bt_pause.setText("暂停");
}
}

.。。。。。。。。。。。。。main.xml。。。。。。。。。。。。

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