转载自：http://blog.csdn.net/yudajun/article/details/7752226

1、调用系统音乐播放器

[java] view plain copy

1. privatevoidplayAudio(StringaudioPath){
2. Intentintent=newIntent();
3. intent.setAction(android.content.Intent.ACTION_VIEW);
4. intent.setDataAndType(Uri.parse(audioPath),"audio/mp3");
5. intent.setComponent(newComponentName("com.android.music","com.android.music.MediaPlaybackActivity"));
6. startActivity(intent);
8. }

或者

[java] view plain copy

1. Intentit=newIntent(Intent.ACTION_VIEW);
2. it.setDataAndType(Uri.parse("/sdcard/111.mp3"),"audio/mp3");
3. startActivity(it);

2、调用系统视频播放器

[java] view plain copy

1. privatevoidplayVideo(StringvideoPath){
2. Intentintent=newIntent(Intent.ACTION_VIEW);
3. Stringstrend="";
4. if(videoPath.toLowerCase().endsWith(".mp4")){
5. strend="mp4";
6. }
7. elseif(videoPath.toLowerCase().endsWith(".3gp")){
8. strend="3gp";
9. }
10. elseif(videoPath.toLowerCase().endsWith(".mov")){
11. strend="mov";
12. }
13. elseif(videoPath.toLowerCase().endsWith(".wmv")){
14. strend="wmv";
15. }
17. intent.setDataAndType(Uri.parse(videoPath),"video/"+strend);
18. startActivity(intent);
19. }

或者

[java] view plain copy

1. Intentit=newIntent(Intent.ACTION_VIEW);
2. it.setDataAndType(Uri.parse("/sdcard/1122.mp4"),"video/mp4");
3. startActivity(it);

播放来自网络多媒体文件

[java] view plain copy

1. Stringextension=MimeTypeMap.getFileExtensionFromUrl(url);
2. StringmimeType=MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
3. IntentmediaIntent=newIntent(Intent.ACTION_VIEW);
4. mediaIntent.setDataAndType(Uri.parse(url),mimeType);
5. startActivity(mediaIntent);

调用系统Camera

[java] view plain copy

1. publicclassSysCameraextendsActivity{
3. publicstaticfinalintMEDIA_TYPE_IMAGE=1;
4. publicstaticfinalintMEDIA_TYPE_VIDEO=2;
6. privatestaticfinalintCAPTURE_IMAGE_ACTIVITY_REQUEST_CODE=100;
7. privatestaticfinalintCAPTURE_VIDEO_ACTIVITY_REQUEST_CODE=200;
9. privateUrifileUri;
10. Buttonbtvideo,btphoto;
12. @Override
13. publicvoidonCreate(BundlesavedInstanceState){
14. super.onCreate(savedInstanceState);
16. setContentView(R.layout.syscamera);
18. btphoto=(Button)findViewById(R.id.sysPhoto);
19. btvideo=(Button)findViewById(R.id.sysVideo);
20. btphoto.setOnClickListener(newMonitor());
21. btvideo.setOnClickListener(newMonitor());
23. }
25. privatevoidPhotoIntent(){
26. //createIntenttotakeapicture
27. Intentintent=newIntent(MediaStore.ACTION_IMAGE_CAPTURE);
29. fileUri=getOutputMediaFileUri(MEDIA_TYPE_IMAGE);//createafiletosavetheimage
30. intent.putExtra(MediaStore.EXTRA_OUTPUT,fileUri);//settheimagefilename
31. //starttheimagecaptureIntent
32. startActivityForResult(intent,CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
33. }
35. privatevoidVideoIntent(){
36. //createnewIntent
37. Intentintent=newIntent(MediaStore.ACTION_VIDEO_CAPTURE);
39. fileUri=getOutputMediaFileUri(MEDIA_TYPE_VIDEO);//createafiletosavethevideo
40. intent.putExtra(MediaStore.EXTRA_OUTPUT,fileUri);//settheimagefilename
41. intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY,1);//setthevideoimagequalitytohigh
42. //starttheVideoCaptureIntent
43. startActivityForResult(intent,CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE);
44. }
46. /**CreateafileUriforsavinganimageorvideo*/
47. privatestaticUrigetOutputMediaFileUri(inttype){
48. returnUri.fromFile(getOutputMediaFile(type));
49. }
51. /**CreateaFileforsavinganimageorvideo*/
52. privatestaticFilegetOutputMediaFile(inttype){
53. if(Environment.getExternalStorageState()==null){
54. returnnull;
55. }
56. FilemediaStorageDir=newFile(Environment.getExternalStoragePublicDirectory(
57. Environment.DIRECTORY_PICTURES),"MyCameraApp");
59. //Createthestoragedirectoryifitdoesnotexist
60. if(!mediaStorageDir.exists()){
61. if(!mediaStorageDir.mkdirs()){
62. Log.d("MyCameraApp","failedtocreatedirectory");
63. returnnull;
64. }
65. }
67. //Createamediafilename
68. StringtimeStamp=newSimpleDateFormat("yyyyMMdd_HHmmss").format(newDate());
69. FilemediaFile;
70. if(type==MEDIA_TYPE_IMAGE){
71. mediaFile=newFile(mediaStorageDir.getPath()+File.separator+
72. "IMG_"+timeStamp+".jpg");
73. }elseif(type==MEDIA_TYPE_VIDEO){
74. mediaFile=newFile(mediaStorageDir.getPath()+File.separator+
75. "VID_"+timeStamp+".mp4");
76. }else{
77. returnnull;
78. }
80. returnmediaFile;
81. }
83. @Override
84. publicvoidonBackPressed(){
85. Intentin=newIntent(this,MyRecorderActivity.class);
86. startActivity(in);
87. super.onBackPressed();
88. }
90. @Override
91. protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){
92. if(requestCode==CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE){
93. if(resultCode==RESULT_OK){
94. //ImagecapturedandsavedtofileUrispecifiedintheIntent
95. Toast.makeText(this,"Imagesavedto:\n"+
96. data.getData(),Toast.LENGTH_LONG).show();
97. }elseif(resultCode==RESULT_CANCELED){
98. //Usercancelledtheimagecapture
99. }else{
100. //Imagecapturefailed,adviseuser
101. }
102. }
104. if(requestCode==CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE){
105. if(resultCode==RESULT_OK){
106. //VideocapturedandsavedtofileUrispecifiedintheIntent
107. Toast.makeText(this,"Videosavedto:\n"+
108. data.getData(),Toast.LENGTH_LONG).show();
109. }elseif(resultCode==RESULT_CANCELED){
110. //Usercancelledthevideocapture
111. }else{
112. //Videocapturefailed,adviseuser
113. }
114. }
115. }
117. classMonitorimplementsOnClickListener{
119. @Override
120. publicvoidonClick(Viewv){
122. switch(v.getId()){
123. caseR.id.sysPhoto:
124. PhotoIntent();
125. break;
126. caseR.id.sysVideo:
127. VideoIntent();
128. break;
129. }
130. }
131. }
132. }

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