开发经常遇到获取图片问题
/*** 读取手机中所有图片信息*/private void getAllPhotoInfo() {new Thread(new Runnable() {@Overridepublic void run() {Uri mImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;String[] projImage = { MediaStore.Images.Media._ID, MediaStore.Images.Media.DATA,MediaStore.Images.Media.SIZE,MediaStore.Images.Media.DISPLAY_NAME};Cursor mCursor = getContentResolver().query(mImageUri,projImage,MediaStore.Images.Media.MIME_TYPE + "=? or " + MediaStore.Images.Media.MIME_TYPE + "=?",new String[]{"image/jpeg", "image/png"},MediaStore.Images.Media.DATE_MODIFIED+" desc");if(mCursor!=null){while (mCursor.moveToNext()) {// 获取图片的路径String path = mCursor.getString(mCursor.getColumnIndex(MediaStore.Images.Media.DATA));int size = mCursor.getInt(mCursor.getColumnIndex(MediaStore.Images.Media.SIZE))/1024;String displayName = mCursor.getString(mCursor.getColumnIndex(MediaStore.Images.Media.DISPLAY_NAME));//用于展示相册初始化界面// 获取该图片的父路径名String dirPath = new File(path).getParentFile().getAbsolutePath();//存储对应关系PhotoDirectory photo = new PhotoDirectory();photo.setCoverPath(path);directories.add(photo);}runOnUiThread(new Runnable() {@Overridepublic void run() {adapter.notifyDataSetChanged();}});mCursor.close();}}}).start();}/*** 获取手机中所有视频的信息*/private void getAllVideoInfos(){new Thread(new Runnable() {@Overridepublic void run() {BitmapFactory.Options options = new BitmapFactory.Options();options.inDither = false;options.inPreferredConfig = Bitmap.Config.ALPHA_8;ContentResolver contentResolver = getContentResolver();Cursor mCursor = contentResolver.query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, null, null,null, null);List<PhotoDirectory> list = new ArrayList<>();if(mCursor!=null){while (mCursor.moveToNext()) {// 获取视频的路径int videoId = mCursor.getInt(mCursor.getColumnIndex(MediaStore.Video.Media._ID));String path = mCursor.getString(mCursor.getColumnIndex(MediaStore.Video.Media.DATA));/* int duration = mCursor.getInt(mCursor.getColumnIndex(MediaStore.Video.Media.DURATION));long size = mCursor.getLong(mCursor.getColumnIndex(MediaStore.Video.Media.SIZE))/1024; //单位kbif(size<0){//某些设备获取size<0，直接计算Log.e("dml","this video size < 0 " + path);size = new File(path).length()/1024;}String displayName = mCursor.getString(mCursor.getColumnIndex(MediaStore.Video.Media.DISPLAY_NAME));long modifyTime = mCursor.getLong(mCursor.getColumnIndex(MediaStore.Video.Media.DATE_MODIFIED));//暂未用到//提前生成缩略图，再获取：/questions/27903264/how-to-get-the-video-thumbnail-path-and-not-the-bitmapString[] projection = { MediaStore.Video.Thumbnails._ID, MediaStore.Video.Thumbnails.DATA};Cursor cursor = getContentResolver().query(MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI, projection, MediaStore.Video.Thumbnails.VIDEO_ID + "=?", new String[]{videoId+""}, null);String thumbPath = "";while (cursor.moveToNext()){thumbPath = cursor.getString(cursor.getColumnIndex(MediaStore.Video.Thumbnails.DATA));}cursor.close();// 获取该视频的父路径名String dirPath = new File(path).getParentFile().getAbsolutePath();*///存储对应关系PhotoDirectory photo = new PhotoDirectory();photo.setCoverPath(path);list.add(photo);}runOnUiThread(new Runnable() {@Overridepublic void run() {for (int i = list.size()-1; i >-1 ; i--) {LogUtil.v(i+"================");directories.add(list.get(i));}adapter.notifyDataSetChanged();}});mCursor.close();}}}).start();}
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1.适配android6.0+系统
2.解决部分机型闪退问题
3.解决图片过大oom闪退问题
