SurfaceView播放视屏

.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.wind.jdproject.MainActivity">


    <EditText
        android:id="@+id/et_path"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="/sdcard/ykzzldx.mp4" />

    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btn_play"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="播放" />

        <Button
            android:id="@+id/btn_pause"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="暂停" />

        <Button
            android:id="@+id/btn_replay"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="重播" />

        <Button
            android:id="@+id/btn_stop"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="停止" />
    </LinearLayout>

    <SurfaceView
        android:id="@+id/sv"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

MainActivity

package cn.bgxt.surfaceviewdemo;

import java.io.File;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
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 Activity {
    private final String TAG = "main";
    private EditText et_path;
    private SurfaceView sv;
    private Button btn_play, btn_pause, btn_replay, btn_stop;
    private MediaPlayer mediaPlayer;
    private SeekBar seekBar;
    private int currentPosition = 0;
    private boolean isPlaying;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        seekBar = (SeekBar) findViewById(R.id.seekBar);
        sv = (SurfaceView) findViewById(R.id.sv);
        et_path = (EditText) findViewById(R.id.et_path);

        btn_play = (Button) findViewById(R.id.btn_play);
        btn_pause = (Button) findViewById(R.id.btn_pause);
        btn_replay = (Button) findViewById(R.id.btn_replay);
        btn_stop = (Button) findViewById(R.id.btn_stop);

        btn_play.setOnClickListener(click);
        btn_pause.setOnClickListener(click);
        btn_replay.setOnClickListener(click);
        btn_stop.setOnClickListener(click);

        // 为SurfaceHolder添加回调
        sv.getHolder().addCallback(callback);

        // 4.0版本之下需要设置的属性
        // 设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到界面
        // sv.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

        // 为进度条添加进度更改事件
        seekBar.setOnSeekBarChangeListener(change);
    }

    private Callback callback = new Callback() {
        // SurfaceHolder被修改的时候回调
        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            Log.i(TAG, "SurfaceHolder 被销毁");
            // 销毁SurfaceHolder的时候记录当前的播放位置并停止播放
            if (mediaPlayer != null && mediaPlayer.isPlaying()) {
                currentPosition = mediaPlayer.getCurrentPosition();
                mediaPlayer.stop();
            }
        }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            Log.i(TAG, "SurfaceHolder 被创建");
            if (currentPosition > 0) {
                // 创建SurfaceHolder的时候，如果存在上次播放的位置，则按照上次播放位置进行播放
                play(currentPosition);
                currentPosition = 0;
            }
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width,
                int height) {
            Log.i(TAG, "SurfaceHolder 大小被改变");
        }

    };

    private OnSeekBarChangeListener change = new OnSeekBarChangeListener() {

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            // 当进度条停止修改的时候触发
            // 取得当前进度条的刻度
            int progress = seekBar.getProgress();
            if (mediaPlayer != null && mediaPlayer.isPlaying()) {
                // 设置当前播放的位置
                mediaPlayer.seekTo(progress);
            }
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

        }

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

        }
    };

    private View.OnClickListener click = new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            switch (v.getId()) {
            case R.id.btn_play:
                play(0);
                break;
            case R.id.btn_pause:
                pause();
                break;
            case R.id.btn_replay:
                replay();
                break;
            case R.id.btn_stop:
                stop();
                break;
            default:
                break;
            }
        }
    };


    /*
     * 停止播放
     */
    protected void stop() {
        if (mediaPlayer != null && mediaPlayer.isPlaying()) {
            mediaPlayer.stop();
            mediaPlayer.release();
            mediaPlayer = null;
            btn_play.setEnabled(true);
            isPlaying = false;
        }
    }

    /**
     * 开始播放
     * 
     * @param msec 播放初始位置    
     */
    protected void play(final int msec) {
        // 获取视频文件地址
        String path = et_path.getText().toString().trim();
        File file = new File(path);
        if (!file.exists()) {
            Toast.makeText(this, "视频文件路径错误", 0).show();
            return;
        }
        try {
            mediaPlayer = new MediaPlayer();
            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
            // 设置播放的视频源
            mediaPlayer.setDataSource(file.getAbsolutePath());
            // 设置显示视频的SurfaceHolder
            mediaPlayer.setDisplay(sv.getHolder());
            Log.i(TAG, "开始装载");
            mediaPlayer.prepareAsync();
            mediaPlayer.setOnPreparedListener(new OnPreparedListener() {

                @Override
                public void onPrepared(MediaPlayer mp) {
                    Log.i(TAG, "装载完成");
                    mediaPlayer.start();
                    // 按照初始位置播放
                    mediaPlayer.seekTo(msec);
                    // 设置进度条的最大进度为视频流的最大播放时长
                    seekBar.setMax(mediaPlayer.getDuration());
                    // 开始线程，更新进度条的刻度
                    new Thread() {

                        @Override
                        public void run() {
                            try {
                                isPlaying = true;
                                while (isPlaying) {
                                    int current = mediaPlayer
                                            .getCurrentPosition();
                                    seekBar.setProgress(current);

                                    sleep(500);
                                }
                            } catch (Exception e) {
                                e.printStackTrace();
                            }
                        }
                    }.start();

                    btn_play.setEnabled(false);
                }
            });
            mediaPlayer.setOnCompletionListener(new OnCompletionListener() {

                @Override
                public void onCompletion(MediaPlayer mp) {
                    // 在播放完毕被回调
                    btn_play.setEnabled(true);
                }
            });

            mediaPlayer.setOnErrorListener(new OnErrorListener() {

                @Override
                public boolean onError(MediaPlayer mp, int what, int extra) {
                    // 发生错误重新播放
                    play(0);
                    isPlaying = false;
                    return false;
                }
            });
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    /**
     * 重新开始播放
     */
    protected void replay() {
        if (mediaPlayer != null && mediaPlayer.isPlaying()) {
            mediaPlayer.seekTo(0);
            Toast.makeText(this, "重新播放", 0).show();
            btn_pause.setText("暂停");
            return;
        }
        isPlaying = false;
        play(0);


    }

    /**
     * 暂停或继续
     */
    protected void pause() {
        if (btn_pause.getText().toString().trim().equals("继续")) {
            btn_pause.setText("暂停");
            mediaPlayer.start();
            Toast.makeText(this, "继续播放", 0).show();
            return;
        }
        if (mediaPlayer != null && mediaPlayer.isPlaying()) {
            mediaPlayer.pause();
            btn_pause.setText("继续");
            Toast.makeText(this, "暂停播放", 0).show();
        }

    }

}