android 获取视频,图片缩略图的具体实现
作者：
1、获取视频缩略图有两个方法(1)通过内容提供器来获取(2)人为创建缩略图
(1)缺点就是必须更新媒体库才能看到最新的视频的缩略图
[java]
/**
* @param context
* @param cr
* @param Videopath
* @return
*/
public static Bitmap getVideoThumbnail(Context context, ContentResolver cr, String Videopath) {
ContentResolver testcr = context.getContentResolver();
String[] projection = { MediaStore.Video.Media.DATA, MediaStore.Video.Media._ID, };
String whereClause = MediaStore.Video.Media.DATA + " = '" + Videopath + "'";
Cursor cursor = testcr.query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, projection, whereClause,
null, null);
int _id = 0;
String videoPath = "";
if (cursor == null || cursor.getCount() == 0) {
return null;
}
if (cursor.moveToFirst()) {
int _idColumn = cursor.getColumnIndex(MediaStore.Video.Media._ID);
int _dataColumn = cursor.getColumnIndex(MediaStore.Video.Media.DATA);
do {
_id = cursor.getInt(_idColumn);
videoPath = cursor.getString(_dataColumn);
} while (cursor.moveToNext());
}
cursor.close();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inDither = false;
options.inPreferredConfig = Bitmap.Config.RGB_565;
Bitmap bitmap = MediaStore.Video.Thumbnails.getThumbnail(cr, _id, Images.Thumbnails.MINI_KIND,
options);
return bitmap;
}
/**
* @param context
* @param cr
* @param Videopath
* @return
*/
public static Bitmap getVideoThumbnail(Context context, ContentResolver cr, String Videopath) {
ContentResolver testcr = context.getContentResolver();
String[] projection = { MediaStore.Video.Media.DATA, MediaStore.Video.Media._ID, };
String whereClause = MediaStore.Video.Media.DATA + " = '" + Videopath + "'";
Cursor cursor = testcr.query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, projection, whereClause,
null, null);
int _id = 0;
String videoPath = "";
if (cursor == null || cursor.getCount() == 0) {
return null;
}
if (cursor.moveToFirst()) {
int _idColumn = cursor.getColumnIndex(MediaStore.Video.Media._ID);
int _dataColumn = cursor.getColumnIndex(MediaStore.Video.Media.DATA);
do {
_id = cursor.getInt(_idColumn);
videoPath = cursor.getString(_dataColumn);
} while (cursor.moveToNext());
}
cursor.close();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inDither = false;
options.inPreferredConfig = Bitmap.Config.RGB_565;
Bitmap bitmap = MediaStore.Video.Thumbnails.getThumbnail(cr, _id, Images.Thumbnails.MINI_KIND,
options);
return bitmap;
}(2)人为创建缩略图要耗费一点时间
[java]
/**
* 获取视频缩略图
* @param videoPath
* @param width
* @param height
* @param kind
* @return
*/
private Bitmap getVideoThumbnail(String videoPath, int width , int height, int kind){
Bitmap bitmap = null;
bitmap = ThumbnailUtils.createVideoThumbnail(videoPath, kind);
bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT);
return bitmap;
}
/**
* 获取视频缩略图
* @param videoPath
* @param width
* @param height
* @param kind
* @return
*/
private Bitmap getVideoThumbnail(String videoPath, int width , int height, int kind){
Bitmap bitmap = null;
bitmap = ThumbnailUtils.createVideoThumbnail(videoPath, kind);
bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT);
return bitmap;
}
2、图片缩略图
[java]
/**
*
* @param context
* @param cr
* @param Imagepath
* @return
*/
public static Bitmap getImageThumbnail(Context context, ContentResolver cr, String Imagepath) {
ContentResolver testcr = context.getContentResolver();
String[] projection = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID, };
String whereClause = MediaStore.Images.Media.DATA + " = '" + Imagepath + "'";
Cursor cursor = testcr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, whereClause,
null, null);
int _id = 0;
String imagePath = "";
if (cursor == null || cursor.getCount() == 0) {
return null;
}
if (cursor.moveToFirst()) {
int _idColumn = cursor.getColumnIndex(MediaStore.Images.Media._ID);
int _dataColumn = cursor.getColumnIndex(MediaStore.Images.Media.DATA);
do {
_id = cursor.getInt(_idColumn);
imagePath = cursor.getString(_dataColumn);
} while (cursor.moveToNext());
}
cursor.close();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inDither = false;
options.inPreferredConfig = Bitmap.Config.RGB_565;
Bitmap bitmap = MediaStore.Images.Thumbnails.getThumbnail(cr, _id, Images.Thumbnails.MINI_KIND,
options);
return bitmap;
}
/**
*
* @param context
* @param cr
* @param Imagepath
* @return
*/
public static Bitmap getImageThumbnail(Context context, ContentResolver cr, String Imagepath) {
ContentResolver testcr = context.getContentResolver();
String[] projection = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID, };
String whereClause = MediaStore.Images.Media.DATA + " = '" + Imagepath + "'";
Cursor cursor = testcr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, whereClause,
null, null);
int _id = 0;
String imagePath = "";
if (cursor == null || cursor.getCount() == 0) {
return null;
}
if (cursor.moveToFirst()) {
int _idColumn = cursor.getColumnIndex(MediaStore.Images.Media._ID);
int _dataColumn = cursor.getColumnIndex(MediaStore.Images.Media.DATA);
do {
_id = cursor.getInt(_idColumn);
imagePath = cursor.getString(_dataColumn);
} while (cursor.moveToNext());
}
cursor.close();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inDither = false;
options.inPreferredConfig = Bitmap.Config.RGB_565;
Bitmap bitmap = MediaStore.Images.Thumbnails.getThumbnail(cr, _id, Images.Thumbnails.MINI_KIND,
options);
return bitmap;
}