?分類： ? Android多媒體（12）??Android應用層（93）?

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在Android中，我們有三種方式來實現視頻的播放：

1、使用其自帶的播放器。指定Action為ACTION_VIEW,Data為Uri，Type為其MIME類型。

2、使用VideoView來播放。在布局文件中使用VideoView結合MediaController來實現對其控制。

3、使用MediaPlayer類和SurfaceView來實現，這種方式很靈活。

?

1、調用其自帶的播放器：

[java]?view plain?copy?print?

1. Uri?uri?=?Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v");?????
2. //調用系統自帶的播放器????
3. ????Intent?intent?=?new?Intent(Intent.ACTION_VIEW);????
4. ????Log.v("URI:::::::::",?uri.toString());????
5. ????intent.setDataAndType(uri,?"video/mp4");????
6. ????startActivity(intent);????

2、使用VideoView來實現：

[java]?view plain?copy?print?

1. Uri?uri?=?Uri.parse(Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v");????
2. VideoView?videoView?=?(VideoView)this.findViewById(R.id.video_view);????
3. videoView.setMediaController(new?MediaController(this));????
4. videoView.setVideoURI(uri);????
5. videoView.start();????
6. videoView.requestFocus();????

3、使用MediaPlayer： [java]?view plain?copy?print?

1. package?demo.camera;????
2. import?java.io.IOException;????
3. import?android.app.Activity;????
4. import?android.media.MediaPlayer;????
5. import?android.media.MediaPlayer.OnCompletionListener;????
6. import?android.media.MediaPlayer.OnErrorListener;????
7. import?android.media.MediaPlayer.OnInfoListener;????
8. import?android.media.MediaPlayer.OnPreparedListener;????
9. import?android.media.MediaPlayer.OnSeekCompleteListener;????
10. import?android.media.MediaPlayer.OnVideoSizeChangedListener;????
11. import?android.os.Bundle;????
12. import?android.os.Environment;????
13. import?android.util.Log;????
14. import?android.view.Display;????
15. import?android.view.SurfaceHolder;????
16. import?android.view.SurfaceView;????
17. import?android.widget.LinearLayout;????
18. /**??
19. ?*?該實例中使用MediaPlayer完成播放，同時界面使用SurfaceView來實現??
20. ?*???
21. ?*?這里我們實現MediaPlayer中很多狀態變化時的監聽器??
22. ?*???
23. ?*?使用Mediaplayer時，也可以使用MediaController類，但是需要實現MediaController.mediaController接口??
24. ?*?實現一些控制方法。??
25. ?*???
26. ?*?然后，設置controller.setMediaPlayer(),setAnchorView(),setEnabled(),show()就可以了，這里不再實現??
27. ?*?@author?Administrator??
28. ?*??
29. ?*/????
30. public?class?VideoSurfaceDemo?extends?Activity?implements?OnCompletionListener,OnErrorListener,OnInfoListener,????
31. ????OnPreparedListener,?OnSeekCompleteListener,OnVideoSizeChangedListener,SurfaceHolder.Callback{????
32. ????private?Display?currDisplay;????
33. ????private?SurfaceView?surfaceView;????
34. ????private?SurfaceHolder?holder;????
35. ????private?MediaPlayer?player;????
36. ????private?int?vWidth,vHeight;????
37. ????//private?boolean?readyToPlay?=?false;????
38. ????????????
39. ????public?void?onCreate(Bundle?savedInstanceState){????
40. ????????super.onCreate(savedInstanceState);????
41. ????????this.setContentView(R.layout.video_surface);????
42. ????????????????????
43. ????????surfaceView?=?(SurfaceView)this.findViewById(R.id.video_surface);????
44. ????????//給SurfaceView添加CallBack監聽????
45. ????????holder?=?surfaceView.getHolder();????
46. ????????holder.addCallback(this);????
47. ????????//為了可以播放視頻或者使用Camera預覽，我們需要指定其Buffer類型????
48. ????????holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);????
49. ????????????
50. ????????//下面開始實例化MediaPlayer對象????
51. ????????player?=?new?MediaPlayer();????
52. ????????player.setOnCompletionListener(this);????
53. ????????player.setOnErrorListener(this);????
54. ????????player.setOnInfoListener(this);????
55. ????????player.setOnPreparedListener(this);????
56. ????????player.setOnSeekCompleteListener(this);????
57. ????????player.setOnVideoSizeChangedListener(this);????
58. ????????Log.v("Begin:::",?"surfaceDestroyed?called");????
59. ????????//然后指定需要播放文件的路徑，初始化MediaPlayer????
60. ????????String?dataPath?=?Environment.getExternalStorageDirectory().getPath()+"/Test_Movie.m4v";????
61. ????????try?{????
62. ????????????player.setDataSource(dataPath);????
63. ????????????Log.v("Next:::",?"surfaceDestroyed?called");????
64. ????????}?catch?(IllegalArgumentException?e)?{????
65. ????????????e.printStackTrace();????
66. ????????}?catch?(IllegalStateException?e)?{????
67. ????????????e.printStackTrace();????
68. ????????}?catch?(IOException?e)?{????
69. ????????????e.printStackTrace();????
70. ????????}????
71. ????????//然后，我們取得當前Display對象????
72. ????????currDisplay?=?this.getWindowManager().getDefaultDisplay();????
73. ????}????
74. ????????
75. ????@Override????
76. ????public?void?surfaceChanged(SurfaceHolder?arg0,?int?arg1,?int?arg2,?int?arg3)?{????
77. ????????//?當Surface尺寸等參數改變時觸發????
78. ????????Log.v("Surface?Change:::",?"surfaceChanged?called");????
79. ????}????
80. ????@Override????
81. ????public?void?surfaceCreated(SurfaceHolder?holder)?{????
82. ????????//?當SurfaceView中的Surface被創建的時候被調用????
83. ????????//在這里我們指定MediaPlayer在當前的Surface中進行播放????
84. ????????player.setDisplay(holder);????
85. ????????//在指定了MediaPlayer播放的容器后，我們就可以使用prepare或者prepareAsync來準備播放了????
86. ????????player.prepareAsync();????
87. ????????????
88. ????}????
89. ????@Override????
90. ????public?void?surfaceDestroyed(SurfaceHolder?holder)?{????
91. ????????????
92. ????????Log.v("Surface?Destory:::",?"surfaceDestroyed?called");????
93. ????}????
94. ????@Override????
95. ????public?void?onVideoSizeChanged(MediaPlayer?arg0,?int?arg1,?int?arg2)?{????
96. ????????//?當video大小改變時觸發????
97. ????????//這個方法在設置player的source后至少觸發一次????
98. ????????Log.v("Video?Size?Change",?"onVideoSizeChanged?called");????
99. ????????????
100. ????}????
101. ????@Override????
102. ????public?void?onSeekComplete(MediaPlayer?arg0)?{????
103. ????????//?seek操作完成時觸發????
104. ????????Log.v("Seek?Completion",?"onSeekComplete?called");????
105. ????????????
106. ????}????
107. ????@Override????
108. ????public?void?onPrepared(MediaPlayer?player)?{????
109. ????????//?當prepare完成后，該方法觸發，在這里我們播放視頻????
110. ????????????
111. ????????//首先取得video的寬和高????
112. ????????vWidth?=?player.getVideoWidth();????
113. ????????vHeight?=?player.getVideoHeight();????
114. ????????????
115. ????????if(vWidth?>?currDisplay.getWidth()?||?vHeight?>?currDisplay.getHeight()){????
116. ????????????//如果video的寬或者高超出了當前屏幕的大小，則要進行縮放????
117. ????????????float?wRatio?=?(float)vWidth/(float)currDisplay.getWidth();????
118. ????????????float?hRatio?=?(float)vHeight/(float)currDisplay.getHeight();????
119. ????????????????
120. ????????????//選擇大的一個進行縮放????
121. ????????????float?ratio?=?Math.max(wRatio,?hRatio);????
122. ????????????????
123. ????????????vWidth?=?(int)Math.ceil((float)vWidth/ratio);????
124. ????????????vHeight?=?(int)Math.ceil((float)vHeight/ratio);????
125. ????????????????
126. ????????????//設置surfaceView的布局參數????
127. ????????????surfaceView.setLayoutParams(new?LinearLayout.LayoutParams(vWidth,?vHeight));????
128. ????????????????
129. ????????????//然后開始播放視頻????
130. ????????????????
131. ????????????player.start();????
132. ????????}????
133. ????}????
134. ????@Override????
135. ????public?boolean?onInfo(MediaPlayer?player,?int?whatInfo,?int?extra)?{????
136. ????????//?當一些特定信息出現或者警告時觸發????
137. ????????switch(whatInfo){????
138. ????????case?MediaPlayer.MEDIA_INFO_BAD_INTERLEAVING:????
139. ????????????break;????
140. ????????case?MediaPlayer.MEDIA_INFO_METADATA_UPDATE:??????
141. ????????????break;????
142. ????????case?MediaPlayer.MEDIA_INFO_VIDEO_TRACK_LAGGING:????
143. ????????????break;????
144. ????????case?MediaPlayer.MEDIA_INFO_NOT_SEEKABLE:?????
145. ????????????break;????
146. ????????}????
147. ????????return?false;????
148. ????}????
149. ????@Override????
150. ????public?boolean?onError(MediaPlayer?player,?int?whatError,?int?extra)?{????
151. ????????Log.v("Play?Error:::",?"onError?called");????
152. ????????switch?(whatError)?{????
153. ????????case?MediaPlayer.MEDIA_ERROR_SERVER_DIED:????
154. ????????????Log.v("Play?Error:::",?"MEDIA_ERROR_SERVER_DIED");????
155. ????????????break;????
156. ????????case?MediaPlayer.MEDIA_ERROR_UNKNOWN:????
157. ????????????Log.v("Play?Error:::",?"MEDIA_ERROR_UNKNOWN");????
158. ????????????break;????
159. ????????default:????
160. ????????????break;????
161. ????????}????
162. ????????return?false;????
163. ????}????
164. ????@Override????
165. ????public?void?onCompletion(MediaPlayer?player)?{????
166. ????????//?當MediaPlayer播放完成后觸發????
167. ????????Log.v("Play?Over:::",?"onComletion?called");????
168. ????????this.finish();????
169. ????}????
170. }????

轉載于:https://www.cnblogs.com/android-blogs/p/5667661.html

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