Android开发之多媒体文件获取工具类实例【音频,视频,图片等】

package com.android.ocr.util;import java.io.File;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.database.Cursor;import android.graphics.Bitmap;import android.provider.MediaStore;/** * 根据MediaStore查询信息 * @Project  App_ReadCard * @Package  com.android.ocr.util * @author   chenlin * @version  1.0 * @Date    2013年6月16日 * @Note    TODO */public class MediaStoreUtil {  private static final String TAG = "MediaStoreUtil";  /**   * 查询音频文件名称   *   * @param context   * @return   */  public static List<String> getAudioNames(Context context) {    List<String> list = new ArrayList<String>();    Cursor cursor = context.getContentResolver().query(        MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,        new String[] { MediaStore.Audio.Media._ID, MediaStore.Audio.Media.DISPLAY_NAME, MediaStore.Audio.Media.TITLE,            MediaStore.Audio.Media.DURATION, MediaStore.Audio.Media.ARTIST, MediaStore.Audio.Media.ALBUM,            MediaStore.Audio.Media.YEAR, MediaStore.Audio.Media.MIME_TYPE, MediaStore.Audio.Media.SIZE,            MediaStore.Audio.Media.DATA }, null, new String[] {}, null);    while (cursor.moveToNext()) {      String fileName = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));      list.add(fileName);    }    return list;  }  /**   * 查询图片文件名称   *   * @param context   * @return   */  public static List<String> getImageNames(Context context) {    List<String> list = new ArrayList<String>();    Cursor cursor = context.getContentResolver().query(        MediaStore.Images.Media.EXTERNAL_CONTENT_URI,        new String[] { MediaStore.Images.Media._ID, MediaStore.Images.Media.DISPLAY_NAME, MediaStore.Images.Media.TITLE,            MediaStore.Images.Media.MIME_TYPE, MediaStore.Images.Media.SIZE, MediaStore.Images.Media.DATA }, null,        new String[] {}, null);    while (cursor.moveToNext()) {      Logger.i(TAG, "filePath==" + MediaStore.Images.Media.DATA);      String filePath = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));      String fileName = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));      list.add(filePath + "/" + fileName);    }    return list;  }  /**   * 查询图片文件   *   * @param context   * @return   */  public static List<File> getImages(Context context) {    List<File> list = new ArrayList<File>();    Cursor cursor = context.getContentResolver().query(        MediaStore.Images.Media.EXTERNAL_CONTENT_URI,        new String[] { MediaStore.Images.Media._ID, MediaStore.Images.Media.DISPLAY_NAME, MediaStore.Images.Media.TITLE,            MediaStore.Images.Media.MIME_TYPE, MediaStore.Images.Media.SIZE, MediaStore.Images.Media.DATA }, null,        new String[] {}, null);    while (cursor.moveToNext()) {      String filePath = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));      Logger.i(TAG, "filePath==" + filePath);      String fileName = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));      //Logger.i(TAG, "fileName==" + fileName);      File file = new File(filePath);      list.add(file);    }    return list;  }  /**   * 查询文件   *   * @param context   * @return   */  public static List<File> getAllFiles(Context context) {    List<File> list = new ArrayList<File>();    Cursor cursor = context.getContentResolver().query(        MediaStore.Images.Media.EXTERNAL_CONTENT_URI,        new String[] { MediaStore.Images.Media._ID, MediaStore.Images.Media.DISPLAY_NAME, MediaStore.Images.Media.TITLE,            MediaStore.Images.Media.MIME_TYPE, MediaStore.Images.Media.SIZE, MediaStore.Images.Media.DATA }, null,        new String[] {}, null);    while (cursor.moveToNext()) {      String filePath = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));      Logger.i(TAG, "filePath==" + filePath);      String fileName = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));      //Logger.i(TAG, "fileName==" + fileName);      File file = new File(filePath);      list.add(file);    }    return list;  }  /**   * 获取所有的缩列图   *   * @param context   * @return   */  public static Bitmap[] getBitmaps(Context context) {    Bitmap[] bitmaps;    String[] projection = { MediaStore.Images.Media._ID, MediaStore.Images.Media.DATA };    Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, null, null,        MediaStore.Images.Media._ID);    int count = cursor.getCount();    int image_column_index = cursor.getColumnIndex(MediaStore.Images.Media._ID);    bitmaps = new Bitmap[count];    for (int i = 0; i < count; i++) {      cursor.moveToPosition(i);      int id = cursor.getInt(image_column_index);      bitmaps[i] = MediaStore.Images.Thumbnails.getThumbnail(context.getContentResolver(), id,          MediaStore.Images.Thumbnails.MICRO_KIND, null);    }    return bitmaps;  }  /**   * 查询图片缩列文件名称   *   * @param context   * @return   */  public static List<String> getThumbNames(Context context) {    List<String> list = new ArrayList<String>();    Cursor cursor = context.getContentResolver().query(        MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI,        new String[] { MediaStore.Images.Thumbnails._ID, MediaStore.Images.Thumbnails.DATA, MediaStore.Images.Thumbnails.KIND,            MediaStore.Images.Thumbnails.IMAGE_ID }, null, new String[] {}, null);    while (cursor.moveToNext()) {      String fileName = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));      list.add(fileName);    }    return list;  }  /**   * 获得所有视频文件   * @param context   */  public static ArrayList<VideoInfo> getVideoInfo(Context context){    String[] thumbColumns = new String[]{        MediaStore.Video.Thumbnails.DATA,        MediaStore.Video.Thumbnails.VIDEO_ID    };    String[] mediaColumns = new String[]{        MediaStore.Video.Media.DATA,        MediaStore.Video.Media._ID,        MediaStore.Video.Media.TITLE,        MediaStore.Video.Media.MIME_TYPE    };    //首先检索SDcard上所有的video    Cursor cursor = context.getContentResolver().query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, mediaColumns, null, null, null);    ArrayList<VideoInfo> videoList = new ArrayList<VideoInfo>();    if(cursor.moveToFirst()){      do{        VideoInfo info = new VideoInfo();        info.filePath = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));        info.mimeType = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE));        info.title = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.TITLE));        //获取当前Video对应的Id，然后根据该ID获取其Thumb        int id = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID));        String selection = MediaStore.Video.Thumbnails.VIDEO_ID +"=?";        String[] selectionArgs = new String[]{            id+""        };        Cursor thumbCursor = context.getContentResolver().query(MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI, thumbColumns, selection, selectionArgs, null);        if(thumbCursor.moveToFirst()){          info.thumbPath = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Thumbnails.DATA));        }        //然后将其加入到videoList        videoList.add(info);      }while(cursor.moveToNext());    }    return videoList;  }  static class VideoInfo{    String filePath;    String mimeType;    String thumbPath;    String title;  }}