AlbumDemo

一个相册App,加载系统内的所有图片、视频，实现图片视频的预览，删除，自动轮播功能，调用系统的相机拍照、录像

1、系统内所有照片、视频的读取 MeadiaRead 类通过ContentResolver类读取 ContentResolver contentResolver = mContext.getContentResolver(); Cursor cursor = contentResolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGES, null, null, null);

2、调用系统相机拍照录像 AlbumUtils，具体调用见CameraActivity /** * Take picture. * * @param activity activity. * @param requestCode code, see {@link Activity#onActivityResult(int, int, Intent)}. * @param outPath file path. */ public static void takeImage(@NonNull Activity activity, int requestCode, File outPath) { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); Uri uri = getUri(activity, outPath); intent.putExtra(MediaStore.EXTRA_OUTPUT, uri); intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION); activity.startActivityForResult(intent, requestCode); }

/**
 * Take video.
 *
 * @param activity    activity.
 * @param requestCode code, see {@link Activity#onActivityResult(int, int, Intent)}.
 * @param outPath     file path.
 * @param quality     currently value 0 means low quality, suitable for MMS messages, and  value 1 means high quality.
 * @param duration    specify the maximum allowed recording duration in seconds.
 * @param limitBytes  specify the maximum allowed size.
 */
public static void takeVideo(@NonNull Activity activity, int requestCode, File outPath,
                             @IntRange(from = 0, to = 1) int quality,
                             @IntRange(from = 1) long duration,
                             @IntRange(from = 1) long limitBytes) {
    Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
    Uri uri = getUri(activity, outPath);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
    intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, quality);
    intent.putExtra(MediaStore.EXTRA_DURATION_LIMIT, duration);
    intent.putExtra(MediaStore.EXTRA_SIZE_LIMIT, limitBytes);
    intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
    intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
    activity.startActivityForResult(intent, requestCode);
}

3、图片、视频的收藏，主要是将图片、视频文件添加的本地数据库当中，取消收藏即从数据库中删除，操作调用见CollectionHelper 数据库使用 org.litepal.android:core:1.3.2 库，具体使用参考郭霖《第一行代码》6.5

tongziwei/AlbumDemo

AlbumDemo