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Android開發(fā)之多媒體文件獲取工具類實(shí)例【音頻,視頻,圖片等】

發(fā)布時(shí)間：2020-10-19 17:21:32 來源：腳本之家 閱讀：291 作者：CharlinGod 欄目：移動(dòng)開發(fā)

本文實(shí)例講述了Android開發(fā)之多媒體文件獲取工具類。分享給大家供大家參考，具體如下：

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;
/**
 * 根據(jù)MediaStore查詢信息
 * @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";
  /**
   * 查詢音頻文件名稱
   *
   * @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;
  }
  /**
   * 查詢圖片文件名稱
   *
   * @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;
  }
  /**
   * 查詢圖片文件
   *
   * @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;
  }
  /**
   * 查詢文件
   *
   * @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;
  }
  /**
   * 獲取所有的縮列圖
   *
   * @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;
  }
  /**
   * 查詢圖片縮列文件名稱
   *
   * @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;
  }
  /**
   * 獲得所有視頻文件
   * @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
    };
    //首先檢索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));
        //獲取當(dāng)前Video對(duì)應(yīng)的Id，然后根據(jù)該ID獲取其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));
        }
        //然后將其加入到videoList
        videoList.add(info);
      }while(cursor.moveToNext());
    }
    return videoList;
  }
  static class VideoInfo{
    String filePath;
    String mimeType;
    String thumbPath;
    String title;
  }
}

更多關(guān)于Android相關(guān)內(nèi)容感興趣的讀者可查看本站專題：《Android多媒體操作技巧匯總(音頻,視頻,錄音等)》、《Android開發(fā)入門與進(jìn)階教程》、《Android視圖View技巧總結(jié)》、《Android文件操作技巧匯總》、《Android資源操作技巧匯總》及《Android控件用法總結(jié)》

希望本文所述對(duì)大家Android程序設(shè)計(jì)有所幫助。

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