/**
* 获取图片缩略图
*
* @param dbId
* @return
*/
public MediaThumbnail getImageThumbnail(int dbId) {
String volumeName = "external";
String selection = Images.Thumbnails.IMAGE_ID + "='" + dbId + "'";
String[] columns =
new String[] {Images.Thumbnails.DATA, Images.Thumbnails.WIDTH, Images.Thumbnails.HEIGHT};
Uri uri = Images.Thumbnails.getContentUri(volumeName);
Cursor cur = null;
try {
cur = mContext.getContentResolver().query(uri, columns, selection, null, null);
if (null == cur) {
return null;
}
if (!cur.moveToFirst()) {
return null;
}
MediaThumbnail thumbnail = new MediaThumbnail();
thumbnail.path = MediaDbUtil.getString(cur, Images.Thumbnails.DATA);
thumbnail.width = MediaDbUtil.getInt(cur, Images.Thumbnails.WIDTH);
thumbnail.height = MediaDbUtil.getInt(cur, Images.Thumbnails.HEIGHT);
thumbnail.dbId = dbId;
thumbnail.type = MediaThumbnail.TYPE_IMAGE;
return thumbnail;
} finally {
if (cur != null) {
cur.close();
}
}
}
/**
* 获取专辑名称
*
* @param dbId
* @return
*/
public String getAlbumBucket(int dbId) {
String volumeName = "external";
String selection = BaseColumns._ID + "='" + dbId + "'";
String[] columns = new String[] {AudioColumns.ALBUM};
Uri uri = Audio.Media.getContentUri(volumeName);
Cursor cur = null;
try {
cur = mContext.getContentResolver().query(uri, columns, selection, null, null);
if (null == cur) {
return null;
}
if (!cur.moveToFirst()) {
return null;
}
return MediaDbUtil.getString(cur, AudioColumns.ALBUM);
} finally {
if (cur != null) {
cur.close();
}
}
}
/**
* 获取文件的MimeType
*
* @param dbId
* @param type
* @return
*/
public String getMimeType(int dbId, int type) {
String volumeName = "external";
String selection = BaseColumns._ID + "='" + dbId + "'";
String[] columns = new String[] {MediaColumns.MIME_TYPE};
Uri uri = null;
switch (type) {
case TYPE_IMAGE:
uri = Images.Media.getContentUri(volumeName);
break;
case TYPE_AUDIO:
uri = Audio.Media.getContentUri(volumeName);
break;
case TYPE_VIDEO:
uri = Video.Media.getContentUri(volumeName);
break;
default:
break;
}
if (uri == null) {
return null;
}
Cursor cur = null;
try {
cur = mContext.getContentResolver().query(uri, columns, selection, null, null);
if (null == cur) {
return null;
}
if (!cur.moveToFirst()) {
return null;
}
return MediaDbUtil.getString(cur, MediaColumns.MIME_TYPE);
} finally {
if (cur != null) {
cur.close();
}
}
}
