Android开发多媒体文件获取,Android开发之多媒体文件获取工具类实例【音频,视频,图片等】...

本文实例讲述了Android开发之多媒体文件获取工具类。分享给大家供大家参考&＃xff0c;具体如下&＃xff1a;

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

* &＃64;Project App_ReadCard

* &＃64;Package com.android.ocr.util

* &＃64;author chenlin

* &＃64;version 1.0

* &＃64;Date 2013年6月16日

* &＃64;Note TODO

*/

public class MediaStoreUtil {

private static final String TAG &＃61; "MediaStoreUtil";

/**

* 查询音频文件名称

*

* &＃64;param context

* &＃64;return

*/

public static List getAudioNames(Context context) {

List list &＃61; new ArrayList();

Cursor cursor &＃61; 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 &＃61; cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));

list.add(fileName);

}

return list;

}

/**

* 查询图片文件名称

*

* &＃64;param context

* &＃64;return

*/

public static List getImageNames(Context context) {

List list &＃61; new ArrayList();

Cursor cursor &＃61; 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&＃61;&＃61;" &＃43; MediaStore.Images.Media.DATA);

String filePath &＃61; cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));

String fileName &＃61; cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));

list.add(filePath &＃43; "/" &＃43; fileName);

}

return list;

}

/**

* 查询图片文件

*

* &＃64;param context

* &＃64;return

*/

public static List getImages(Context context) {

List list &＃61; new ArrayList();

Cursor cursor &＃61; 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 &＃61; cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));

Logger.i(TAG, "filePath&＃61;&＃61;" &＃43; filePath);

String fileName &＃61; cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));

//Logger.i(TAG, "fileName&＃61;&＃61;" &＃43; fileName);

File file &＃61; new File(filePath);

list.add(file);

}

return list;

}

/**

* 查询文件

*

* &＃64;param context

* &＃64;return

*/

public static List getAllFiles(Context context) {

List list &＃61; new ArrayList();

Cursor cursor &＃61; 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 &＃61; cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));

Logger.i(TAG, "filePath&＃61;&＃61;" &＃43; filePath);

String fileName &＃61; cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));

//Logger.i(TAG, "fileName&＃61;&＃61;" &＃43; fileName);

File file &＃61; new File(filePath);

list.add(file);

}

return list;

}

/**

* 获取所有的缩列图

*

* &＃64;param context

* &＃64;return

*/

public static Bitmap[] getBitmaps(Context context) {

Bitmap[] bitmaps;

String[] projection &＃61; { MediaStore.Images.Media._ID, MediaStore.Images.Media.DATA };

Cursor cursor &＃61; context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, null, null,

MediaStore.Images.Media._ID);

int count &＃61; cursor.getCount();

int image_column_index &＃61; cursor.getColumnIndex(MediaStore.Images.Media._ID);

bitmaps &＃61; new Bitmap[count];

for (int i &＃61; 0; i

cursor.moveToPosition(i);

int id &＃61; cursor.getInt(image_column_index);

bitmaps[i] &＃61; 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

*

* &＃64;param context

* &＃64;return

*/

public static List getThumbNames(Context context) {

List list &＃61; new ArrayList();

Cursor cursor &＃61; 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 &＃61; cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));

list.add(fileName);

}

return list;

}

/**

* 获得所有视频文件

* &＃64;param context

*/

public static ArrayList getVideoInfo(Context context){

String[] thumbColumns &＃61; new String[]{

MediaStore.Video.Thumbnails.DATA,

MediaStore.Video.Thumbnails.VIDEO_ID

};

String[] mediaColumns &＃61; 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 &＃61; context.getContentResolver().query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, mediaColumns, null, null, null);

ArrayList videoList &＃61; new ArrayList();

if(cursor.moveToFirst()){

do{

VideoInfo info &＃61; new VideoInfo();

info.filePath &＃61; cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));

info.mimeType &＃61; cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE));

info.title &＃61; cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.TITLE));

//获取当前Video对应的Id&＃xff0c;然后根据该ID获取其Thumb

int id &＃61; cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Video.Media._ID));

String selection &＃61; MediaStore.Video.Thumbnails.VIDEO_ID &＃43;"&＃61;?";

String[] selectionArgs &＃61; new String[]{

id&＃43;""

};

Cursor thumbCursor &＃61; context.getContentResolver().query(MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI, thumbColumns, selection, selectionArgs, null);

if(thumbCursor.moveToFirst()){

info.thumbPath &＃61; 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;

}

}

希望本文所述对大家Android程序设计有所帮助。