Android 簡單視頻播放器

//結構目錄

只有一個主Activity，處理一切事情

//程序運行效果

//看看代碼

1. package sn.len.video;
3. import java.io.File;
4. import java.io.IOException;
6. import Android.app.Activity;
7. import android.media.AudioManager;
8. import android.media.MediaPlayer;
9. import android.os.Bundle;
10. import android.os.Environment;
11. import android.view.SurfaceHolder;
12. import android.view.SurfaceView;
13. import android.view.View;
14. import android.view.View.OnClickListener;
15. import android.widget.EditText;
16. import android.widget.ImageButton;
18. public class VideoPlayerActivity extends Activity implements OnClickListener
19. {
20. private EditText editText;
21. private String fileName;
22. private MediaPlayer mediaPlayer;
23. private SurfaceView surfaceView;
24. private int position;
25. @Override
26. public void onCreate(Bundle savedInstanceState)
27. {
28. super.onCreate(savedInstanceState);
29. setContentView(R.layout.main);
30. mediaPlayer=new MediaPlayer();
31. surfaceView=(SurfaceView)findViewById(R.id.surfaceview);
32. //設置surfaceView的一些初始化參數
33. //得到要操作SurfaceView的對象
34. SurfaceHolder surfaceHolder=surfaceView.getHolder();
35. //設置屏幕像索
36. surfaceHolder.setFixedSize(200, 200);
37. //不用屏幕緩沖
38. surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
39. //處理當電話來電時，而addCallback裡面是一個接口，所以弄個類來實現它才行
40. surfaceHolder.addCallback(new MyCallback());
42. editText=(EditText)findViewById(R.id.fileName);
43. fileName=editText.getText().toString();
44. ImageButton start=(ImageButton)findViewById(R.id.play);
45. ImageButton pause=(ImageButton)findViewById(R.id.pause);
46. ImageButton replay=(ImageButton)findViewById(R.id.reset);
47. ImageButton stop=(ImageButton)findViewById(R.id.stop);
49. start.setOnClickListener(this);
50. pause.setOnClickListener(this);
51. replay.setOnClickListener(this);
52. stop.setOnClickListener(this);
53. }
54. private class MyCallback implements SurfaceHolder.Callback
55. {
56. //當第二次surface創建的時候，已經拿到了上次的斷點就可以接著放了。
57. @Override
58. public void surfaceChanged(SurfaceHolder holder, int format, int width,int height)
59. {
60. if(position>0 && fileName!=null)
61. {
62. try
63. {
64. play();
65. mediaPlayer.seekTo(position);
66. position=0;
68. }
69. catch (IOException e)
70. {
71. e.printStackTrace();
72. }
74. }
75. }
76. @Override
77. public void surfaceCreated(SurfaceHolder holder)
78. {
80. }
81. //當電話來的時候，也就是surface要消毀的時候，記錄視頻的位置
82. @Override
83. public void surfaceDestroyed(SurfaceHolder holder)
84. {
85. position=mediaPlayer.getCurrentPosition();
86. mediaPlayer.stop();
87. }
88. }
89. @Override
90. public void onClick(View v)
91. {
92. //可以判斷下SD卡是否存在
93. //Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)
94. try {
95. switch (v.getId())
96. {
97. case R.id.play:
98. {
99. play();
101. }break;
102. case R.id.pause:
103. {
104. if(mediaPlayer.isPlaying())
105. {
106. mediaPlayer.pause();
107. }
108. else
109. {
110. mediaPlayer.start();
111. }
112. }break;
113. case R.id.reset:
114. {
115. if(mediaPlayer.isPlaying())
116. {
117. mediaPlayer.seekTo(0);
118. }
119. else
120. {
121. play();
122. }
123. }break;
124. case R.id.stop:
125. {
126. if(mediaPlayer.isPlaying())
127. {
128. mediaPlayer.stop();
129. }
130. }break;
131. default:break;
132. }
133. } catch (IOException e)
134. {
136. e.printStackTrace();
137. }
138. }
140. private void play() throws IOException
141. {
142. File videoFile=new File(Environment.getExternalStorageDirectory(),fileName);
143. mediaPlayer.reset();
144. //設置影片類型
145. mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
146. //讓surfaceView來播放
147. mediaPlayer.setDisplay(surfaceView.getHolder());
148. //設置路徑
149. mediaPlayer.setDataSource(videoFile.getAbsolutePath());
150. mediaPlayer.prepare();//緩沖
151. mediaPlayer.start();//播放
152. }
153. }