Android 流媒体系列（二）

import java.io.IOException;import android.app.Activity;import android.content.ContentResolver;import android.database.Cursor;import android.media.ExifInterface;import android.os.Bundle;import android.provider.MediaStore;public class MainActivity extends Activity {    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        //测试1        //getVideosInfo();        //测试2        //getPhotosInfo();        //测试3        getAudiosInfo();    }        //获取设备上所有的视频信息private void getVideosInfo() {ContentResolver contentResolver=getContentResolver();String [] videoColumns=new String[]{MediaStore.Video.Media._ID,MediaStore.Video.Media.DATA,MediaStore.Video.Media.TITLE,MediaStore.Video.Media.MIME_TYPE};//      两种方法均可//Cursor cursor=//    this.managedQuery(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, mediaColumns, null, null, null);Cursor cursor=contentResolver.query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, videoColumns, null, null, null);while (cursor.moveToNext()) {String _id=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID));String filePath=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));String title=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.TITLE));String mime_type=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE));    System.out.println("_id="+_id);    System.out.println("title="+title);    System.out.println("filePath="+filePath);    System.out.println("mime_type="+mime_type);}} //获取设备上所有的照片信息 private void getPhotosInfo() {ContentResolver contentResolver=getContentResolver();String [] photoColumns=new String[]{MediaStore.Images.Media._ID,MediaStore.Images.Media.DATA,MediaStore.Images.Media.TITLE,MediaStore.Images.Media.MIME_TYPE,MediaStore.Images.Media.SIZE,MediaStore.Images.Media.ORIENTATION};//      两种方法均可//Cursor cursor=//    this.managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, mediaColumns, null, null, null);Cursor cursor=contentResolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, photoColumns, null, null, null);while (cursor.moveToNext()) {String _id=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID));String filePath=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA));String title=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.TITLE));String mime_type=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.MIME_TYPE));String size=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.SIZE));//得到照片旋转角度方法一String orientation0=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.ORIENTATION));    System.out.println("_id="+_id);    System.out.println("size="+size);    System.out.println("title="+title);    System.out.println("filePath="+filePath);    System.out.println("mime_type="+mime_type);    System.out.println("第一处 orientation0="+orientation0);    try {ExifInterface exifInterface=new ExifInterface(filePath);String image_length=exifInterface.getAttribute(ExifInterface.TAG_IMAGE_LENGTH);String image_width=exifInterface.getAttribute(ExifInterface.TAG_IMAGE_WIDTH);String orientation1=exifInterface.getAttribute(ExifInterface.TAG_ORIENTATION);String dateTime=exifInterface.getAttribute(ExifInterface.TAG_DATETIME);System.out.println("image_length="+image_length);System.out.println("image_width="+image_width);System.out.println("dateTime="+dateTime);//得到照片旋转角度方法二//应该结合ExifInterface源码分析.//此处有待于进一步分析和验证switch (Integer.valueOf(orientation1)) {case 1:System.out.println("第二处旋转角度="+0);break;case 2://matrix.invert(matrix);break;case 3://matrix.setRotate(180);System.out.println("第二处旋转角度="+180);break;case 4://matrix.invert(matrix);//matrix.setRotate(180);System.out.println("第二处旋转角度="+180);break;case 5://matrix.setRotate(90);//matrix.invert(matrix);System.out.println("第二处旋转角度="+90);break;case 6://matrix.setRotate(90);System.out.println("第二处旋转角度="+90);break; case 7: //matrix.invert(matrix);//matrix.setRotate(90);System.out.println("第二处旋转角度="+90);break;    case 8://matrix.setRotate(270);System.out.println("第二处旋转角度="+270);break;default: break;}System.out.println("XXXXXXXXXXXXXXXXXXX");} catch (IOException e) {e.printStackTrace();}}  }  //获取设备上所有的音频信息 private void getAudiosInfo() {ContentResolver contentResolver=getContentResolver();String [] audioColumns=new String[]{MediaStore.Audio.Media._ID,MediaStore.Audio.Media.DATA,MediaStore.Audio.Media.TITLE,MediaStore.Audio.Media.MIME_TYPE};//      两种方法均可//Cursor cursor=//    this.managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, mediaColumns, null, null, null);Cursor cursor=contentResolver.query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, audioColumns, null, null, null);while (cursor.moveToNext()) {String _id=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media._ID));String filePath=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));String title=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));String mime_type=cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.MIME_TYPE));    System.out.println("_id="+_id);    System.out.println("title="+title);    System.out.println("filePath="+filePath);    System.out.println("mime_type="+mime_type);}  }   }

移动开发:Android中MediaStore使用示例

转载文章：http://blog.csdn.net/djy1992/article/details/9948105