1、视图
1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:orientation="vertical" 6 tools:context=".MainActivity" > 7 8 <EditText 9 android:id="@+id/et_path" 10 android:hint="请输入视频文件" 11 android:layout_width="fill_parent" 12 android:layout_height="wrap_content" 13 android:text="/sdcard/mm.mp4" 14 /> 15 16 <SeekBar 17 android:id="@+id/sb" 18 android:layout_width="fill_parent" 19 android:layout_height="wrap_content" /> 20 21 <LinearLayout 22 android:layout_width="fill_parent" 23 android:layout_height="wrap_content" 24 android:orientation="horizontal" 25 > 26 <Button 27 android:id="@+id/bt_play" 28 android:layout_weight="1" 29 android:layout_width="0dip" 30 android:layout_height="wrap_content" 31 android:text="播放" 32 /> 33 <Button 34 android:id="@+id/bt_pause" 35 android:layout_weight="1" 36 android:layout_width="0dip" 37 android:layout_height="wrap_content" 38 android:text="暂停" 39 /> 40 <Button 41 android:id="@+id/bt_replay" 42 android:layout_weight="1" 43 android:layout_width="0dip" 44 android:layout_height="wrap_content" 45 android:text="重播" 46 /> 47 <Button 48 android:id="@+id/bt_stop" 49 android:layout_weight="1" 50 android:layout_width="0dip" 51 android:layout_height="wrap_content" 52 android:text="停止" 53 /> 54 55 </LinearLayout> 56 57 <SurfaceView 58 android:id="@+id/sv" 59 android:layout_width="fill_parent" 60 android:layout_height="wrap_content" 61 /> 62 63 </LinearLayout>
2、android代码
1 package com.example.videoplay;
2
3 import java.io.File;
4
5 import android.media.AudioManager;
6 import android.media.MediaPlayer;
7 import android.media.MediaPlayer.OnCompletionListener;
8 import android.os.Bundle;
9 import android.app.Activity;
10 import android.view.Menu;
11 import android.view.SurfaceHolder;
12 import android.view.SurfaceHolder.Callback;
13 import android.view.SurfaceView;
14 import android.view.View;
15 import android.view.View.OnClickListener;
16 import android.widget.Button;
17 import android.widget.EditText;
18 import android.widget.SeekBar;
19 import android.widget.SeekBar.OnSeekBarChangeListener;
20 import android.widget.Toast;
21
22 public class MainActivity extends Activity implements OnClickListener{
23 private EditText et_path;
24 private Button bt_play,bt_pause,bt_replay,bt_stop;
25 private MediaPlayer mediaPlayer;
26 private SurfaceView sv;
27 private int currentPosition;
28 private SeekBar sb;
29 private boolean isplaying;
30 @Override
31 protected void onCreate(Bundle savedInstanceState) {
32 super.onCreate(savedInstanceState);
33 setContentView(R.layout.activity_main);
34
35 et_path = (EditText) findViewById(R.id.et_path);
36 bt_play = (Button) findViewById(R.id.bt_play);
37 bt_pause = (Button) findViewById(R.id.bt_pause);
38 bt_replay = (Button) findViewById(R.id.bt_replay);
39 bt_stop = (Button) findViewById(R.id.bt_stop);
40
41 sb = (SeekBar) findViewById(R.id.sb);
42
43 //监听进度条拖动改变状态
44 sb.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
45 //当拖动停止时的调用的方法
46 @Override
47 public void onStopTrackingTouch(SeekBar seekBar) {
48 int process = sb.getProgress();
49 if(mediaPlayer != null && mediaPlayer.isPlaying()){
50 mediaPlayer.seekTo(process);
51 }
52
53 }
54
55 @Override
56 public void onStartTrackingTouch(SeekBar seekBar) {
57 // TODO Auto-generated method stub
58
59 }
60
61 @Override
62 public void onProgressChanged(SeekBar seekBar, int progress,
63 boolean fromUser) {
64 // TODO Auto-generated method stub
65
66 }
67 });
68
69 sv = (SurfaceView) findViewById(R.id.sv);
70
71 //为什么要增加这个回调?主要是监控holder的变化的;因为如果你按一下小房子，声音仍在，而holder容易被销毁，再次打开时，看不到画面
72 sv.getHolder().addCallback(new Callback(){
73
74 @Override
75 public void surfaceChanged(SurfaceHolder holder, int format,
76 int width, int height) {
77 // TODO Auto-generated method stub
78 System.out.println("holder被改变了!");
79
80 }
81
82 @Override
83 public void surfaceCreated(SurfaceHolder holder) {
84 // TODO Auto-generated method stub
85 System.out.println("holder被创建了!");
86 if(currentPosition > 0){
87 play(currentPosition);
88 }
89
90 }
91
92 @Override
93 public void surfaceDestroyed(SurfaceHolder holder) {
94 // TODO Auto-generated method stub
95 System.out.println("holder被销毁了!");
96
97 if(mediaPlayer != null && mediaPlayer.isPlaying()){
98 currentPosition = mediaPlayer.getCurrentPosition();//获取当前所播放的位置
99 stop();//holder被销毁时,就stop媒体
100 }
101
102 }
103
104 });
105
106 bt_play.setOnClickListener(this);
107 bt_pause.setOnClickListener(this);
108 bt_replay.setOnClickListener(this);
109 bt_stop.setOnClickListener(this);
110 }
111
112
113 @Override
114 public void onClick(View v) {
115 switch(v.getId()){
116 case R.id.bt_play:
117 play(0);
118 break;
119 case R.id.bt_pause:
120 pause();
121 break;
122 case R.id.bt_replay:
123 replay();
124 break;
125 case R.id.bt_stop:
126 stop();
127 break;
128 }
129
130 }
131
132 private void pause() {
133 if("继续".equals(bt_pause.getText().toString().trim())){
134 mediaPlayer.start();
135 bt_pause.setText("暂停");
136 return;
137 }
138 if(mediaPlayer != null && mediaPlayer.isPlaying()){
139 mediaPlayer.pause();
140 bt_pause.setText("继续");
141 return;
142 }
143
144 }
145
146
147 private void replay() {
148 if(mediaPlayer != null && mediaPlayer.isPlaying()){
149 mediaPlayer.seekTo(0);
150 return;
151 }
152 play(0);
153
154 }
155
156
157 private void stop() {
158 // TODO Auto-generated method stub
159 if(mediaPlayer != null && mediaPlayer.isPlaying()){
160 mediaPlayer.stop();
161 mediaPlayer.release();
162 mediaPlayer = null;
163 bt_play.setEnabled(true);
164 isplaying = false;
165 }
166 }
167
168
169 private void play(int currentPosition2){
170 String path = et_path.getText().toString().trim();
171 //File file = new File(path);
172 //if(file.exists() && file.length() > 0){
173 try {
174 mediaPlayer = new MediaPlayer();
175 mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
176 mediaPlayer.setDisplay(sv.getHolder());//设置video以SurfaceHolder播放
177 mediaPlayer.setDataSource(path);
178 //mediaPlayer.seekTo(currentPosition2);//不能把这定位放在此，否则播放不了
179 mediaPlayer.prepare();
180 mediaPlayer.seekTo(currentPosition2);
181 mediaPlayer.start();
182 //获取视频总长度
183 int max = mediaPlayer.getDuration();
184 sb.setMax(max);
185 new Thread(){
186 public void run(){
187 isplaying = true;
188 while(isplaying){
189 int position = mediaPlayer.getCurrentPosition();
190 sb.setProgress(position);
191 try {
192 Thread.sleep(500);
193 } catch (InterruptedException e) {
194 // TODO Auto-generated catch block
195 e.printStackTrace();
196 }
197 }
198 }
199 }.start();
200 mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
201
202 @Override
203 public void onCompletion(MediaPlayer mp) {
204 // TODO Auto-generated method stub
205 bt_play.setEnabled(true);
206 isplaying = false;
207
208 }
209 });
210 bt_play.setEnabled(false);
211 } catch (Exception e) {
212 // TODO Auto-generated catch block
213 Toast.makeText(this, "播放失败!", 0).show();
214 e.printStackTrace();
215 }
216 //}else{
217 //Toast.makeText(this, "音频文件不存在!", 0).show();
218 //}
219 }
220
221 }
注意:
1)如果要播放互联网文件，则要加入网络权限: <uses-permission android:name="android.permission.INTERNET"/>
2)要注意和音频文件的播放代码进行比较，音频代码为:http://www.cnblogs.com/zhongyinghe/p/5354040.html
时间： 2024-10-07 08:31:31