Android选择本地视频和照片上传到服务器

/**
 * 将后端传输的数据转换为Bitmap格式
 */
public Bitmap returnBitMap(String url) {
    URL myFileUrl = null;
    Bitmap bitmap = null;
    try {
        myFileUrl = new URL(url);
    } catch (MalformedURLException e) {
        e.printStackTrace();
    }
    try {
        HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
        conn.setDoInput(true);
        conn.connect();
        InputStream is = conn.getInputStream();
        bitmap = BitmapFactory.decodeStream(is);
        is.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return bitmap;

/**
 * 视频和照片的content格式转file
 * 照片使用的是新创建照片选择器，不是安卓本身自带的，获取到的路径就是带后缀的可以直接上传
 * 视频选择是使用的安卓自带的视频选择器，获取的是content开头的文件，需要转换成file格式再上传
 * 这里的imageUri只是一个定义，不是只针对image
 */
public static String getImageAbsolutePath(Context context, Uri imageUri) {
    if (context == null || imageUri == null)
        return null;
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, imageUri)) {
        if (isExternalStorageDocument(imageUri)) {
            String docId = DocumentsContract.getDocumentId(imageUri);
            String[] split = docId.split(":");
            String type = split[0];
            if ("primary".equalsIgnoreCase(type)) {
                return Environment.getExternalStorageDirectory() + "/" + split[1];
            }
        } else if (isDownloadsDocument(imageUri)) {
            String id = DocumentsContract.getDocumentId(imageUri);
            Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.parseLong(id));
            return getDataColumn(context, contentUri, null, null);
        } else if (isMediaDocument(imageUri)) {
            String docId = DocumentsContract.getDocumentId(imageUri);
            //定于标识
            String[] split = docId.split(":");
            String type = split[0];
            Uri contentUri = null;
            //图片执行
            if ("image".equals(type)) {
                contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
            }
            //视频执行
            else if ("video".equals(type)) {
                contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
            }
            //音频执行
            else if ("audio".equals(type)) {
                contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
            }
            String selection = MediaStore.Images.Media._ID + "=?";
            String[] selectionArgs = new String[]{split[1]};
            return getDataColumn(context, contentUri, selection, selectionArgs);
        }
    } // MediaStore (and general)
    else if ("content".equalsIgnoreCase(imageUri.getScheme())) {
        // Return the remote address
        if (isGooglePhotosUri(imageUri))
            return imageUri.getLastPathSegment();
        return getDataColumn(context, imageUri, null, null);
    }
    // File
    else if ("file".equalsIgnoreCase(imageUri.getScheme())) {
        return imageUri.getPath();
    }
    return null;
}
/**
 * 从本地设备数据库查询数据.
 *
 * @param context       上下文
 * @param uri           内容提供者的标识
 * @param selection     设置条件，相当于SQL语句中的where
 * @param selectionArgs 条件值
 * @return 查询结果
 */
public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
    Cursor cursor = null;
    String column = MediaStore.Images.Media.DATA;
    String[] projection = {column};  //告诉Provider要返回的内容（列Column）
    try {
        cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
        if (cursor != null && cursor.moveToFirst()) {
            int index = cursor.getColumnIndexOrThrow(column);
            return cursor.getString(index);
        }
    } finally {
        if (cursor != null)
            cursor.close();
    }
    return null;
}
/**
 * @param uri The Uri to check.
 * @return Whether the Uri authority is ExternalStorageProvider.
 */
public static boolean isExternalStorageDocument(Uri uri) {
    return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
 * @param uri The Uri to check.
 * @return Whether the Uri authority is DownloadsProvider.
 */
public static boolean isDownloadsDocument(Uri uri) {
    return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
 * @param uri The Uri to check.
 * @return Whether the Uri authority is MediaProvider.
 */
public static boolean isMediaDocument(Uri uri) {
    return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
 * @param uri The Uri to check.
 * @return Whether the Uri authority is Google Photos.
 */
public static boolean isGooglePhotosUri(Uri uri) {
    return "com.google.android.apps.photos.content".equals(uri.getAuthority());