Android 调用系统播放器，调用系统Camera

1、调用系统音乐播放器

private void playAudio(String audioPath){	
		Intent intent = new Intent();  
        intent.setAction(android.content.Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.parse(audioPath), "audio/mp3");
        intent.setComponent(new ComponentName("com.android.music","com.android.music.MediaPlaybackActivity"));
        startActivity(intent);
		
	}

或者

Intent it = new Intent(Intent.ACTION_VIEW);
		it.setDataAndType(Uri.parse("/sdcard/111.mp3"), "audio/mp3");
		startActivity(it);

2、调用系统视频播放器

private void playVideo(String videoPath){
		   Intent intent = new Intent(Intent.ACTION_VIEW);
		   String strend="";
		   if(videoPath.toLowerCase().endsWith(".mp4")){
			   strend="mp4";
		   }
		   else if(videoPath.toLowerCase().endsWith(".3gp")){
			   strend="3gp";
		   }
		   else if(videoPath.toLowerCase().endsWith(".mov")){
			   strend="mov";
		   }
		   else if(videoPath.toLowerCase().endsWith(".wmv")){
			   strend="wmv";
		   }
		   
		   intent.setDataAndType(Uri.parse(videoPath), "video/"+strend);
		   startActivity(intent);
	   }

或者

Intent it = new Intent(Intent.ACTION_VIEW);
		it.setDataAndType(Uri.parse("/sdcard/1122.mp4"), "video/mp4");
		startActivity(it);

播放来自网络多媒体文件

String extension = MimeTypeMap.getFileExtensionFromUrl(url);
String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
Intent mediaIntent = new Intent(Intent.ACTION_VIEW);
mediaIntent.setDataAndType(Uri.parse(url), mimeType);
startActivity(mediaIntent);

调用系统Camera

public class SysCamera extends Activity {

	public static final int MEDIA_TYPE_IMAGE = 1;
	public static final int MEDIA_TYPE_VIDEO = 2;

	private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 100;
	private static final int CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE = 200;

	private Uri fileUri;
	Button btvideo,btphoto;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);
        
	    setContentView(R.layout.syscamera);
	   
	    btphoto=(Button)findViewById(R.id.sysPhoto);
	    btvideo=(Button)findViewById(R.id.sysVideo);
	    btphoto.setOnClickListener(new Monitor());
	    btvideo.setOnClickListener(new Monitor());
	    
	}
	
	private void PhotoIntent(){
		 // create Intent to take a picture 
	    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

	    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image
	    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name
	    // start the image capture Intent
	    startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
	}
	
	private void VideoIntent(){
		 //create new Intent
	    Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

	    fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO);  // create a file to save the video
	    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);  // set the image file name
	    intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); // set the video image quality to high
	    // start the Video Capture Intent
	    startActivityForResult(intent, CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE);
	}
	
	/** Create a file Uri for saving an image or video */
	private static Uri getOutputMediaFileUri(int type){
	      return Uri.fromFile(getOutputMediaFile(type));
	}

	/** Create a File for saving an image or video */
	private static File getOutputMediaFile(int type){
		if (Environment.getExternalStorageState() == null){
			return null;
		} 
	    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
	              Environment.DIRECTORY_PICTURES), "MyCameraApp");
	   
	    // Create the storage directory if it does not exist
	    if (! mediaStorageDir.exists()){
	        if (! mediaStorageDir.mkdirs()){
	            Log.d("MyCameraApp", "failed to create directory");
	            return null;
	        }
	    }

	    // Create a media file name
	    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
	    File mediaFile;
	    if (type == MEDIA_TYPE_IMAGE){
	        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
	        "IMG_"+ timeStamp + ".jpg");
	    } else if(type == MEDIA_TYPE_VIDEO) {
	        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
	        "VID_"+ timeStamp + ".mp4");
	    } else {
	        return null;
	    }

	    return mediaFile;
	}
	
	 @Override
	 public void onBackPressed() {
	    	Intent in=new Intent(this, MyRecorderActivity.class);
	    	startActivity(in);
	    	super.onBackPressed();
	    }
	 
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
	    if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
	        if (resultCode == RESULT_OK) {
	            // Image captured and saved to fileUri specified in the Intent
	            Toast.makeText(this, "Image saved to:\n" +
	                     data.getData(), Toast.LENGTH_LONG).show();
	        } else if (resultCode == RESULT_CANCELED) {
	            // User cancelled the image capture
	        } else {
	            // Image capture failed, advise user
	        }
	    }

	    if (requestCode == CAPTURE_VIDEO_ACTIVITY_REQUEST_CODE) {
	        if (resultCode == RESULT_OK) {
	            // Video captured and saved to fileUri specified in the Intent
	            Toast.makeText(this, "Video saved to:\n" +
	                     data.getData(), Toast.LENGTH_LONG).show();
	        } else if (resultCode == RESULT_CANCELED) {
	            // User cancelled the video capture
	        } else {
	            // Video capture failed, advise user
	        }
	    }
	}
	
	class Monitor implements OnClickListener{

		@Override
		public void onClick(View v) {
			
				switch(v.getId()){
				case R.id.sysPhoto:
					PhotoIntent();
					break;
				case R.id.sysVideo:
					VideoIntent();
					break;
				}
		}
	}
}