解決：選擇系統的圖片或視訊在有的版本上拿不到檔案路徑的問題

原因：Android 4.4前後版本讀取本地圖片或視訊的方式有變化

package cn.hellomrhuang.player.util;

import android.annotation.TargetApi;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import
 
 android.provider.DocumentsContract;
import android.provider.MediaStore;

/**
 * Created by huangbao on 2018/3/31.
 */

public class Uti2FileUtils {


    @TargetApi(Build.VERSION_CODES.KITKAT)
    public static String getPath(final Context context, final Uri uri) {
        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
        if
 
 (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final
 
 String type = split[0];
                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/"
                            + split[1];
                }
                // TODO handle non-primary volumes
            }         // DownloadsProvider
                         else if (isDownloadsDocument(uri)) {
                                 final String id = DocumentsContract.getDocumentId(uri);
                                 final Uri contentUri = ContentUris.withAppendedId(
                                                 Uri.parse("content://downloads/public_downloads"),
                                                 Long.valueOf(id));
                                 return getDataColumn(context, contentUri, null, null);
                             }else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];
                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }
                final String selection = MediaStore.MediaColumns._ID + "=?";
                final String[] selectionArgs = new String[] { split[1] };
                return getDataColumn(context, contentUri, selection,
                        selectionArgs);
            }
        }  // MediaStore (and general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {
            // Return the remote address
            if (isGooglePhotosUri(uri))
                return uri.getLastPathSegment();
            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }
        return  "";
    }

    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 MediaProvider.
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri
                .getAuthority());
    }


    public static String getDataColumn(Context context, Uri uri,
                                       String selection, String[] selectionArgs) {
        Cursor cursor = null;
        final String column = MediaStore.MediaColumns.DATA;
        final String[] projection = { column };
        try {
            cursor = context.getContentResolver().query(uri, projection,
                    selection, selectionArgs, null);
            if (cursor != null && cursor.moveToFirst()) {
                final int index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }


    /**
     115      * @param uri
     116      *            The Uri to check.
     117      * @return Whether the Uri authority is DownloadsProvider.
     118      */
     public static boolean isDownloadsDocument(Uri uri) {
                 return "com.android.providers.downloads.documents".equals(uri
                                 .getAuthority());
             }

    /**
     135      * @param uri
     136      *            The Uri to check.
     137      * @return Whether the Uri authority is Google Photos.
     138      */
     public static boolean isGooglePhotosUri(Uri uri) {
                 return "com.google.android.apps.photos.content".equals(uri
                                 .getAuthority());
             }
}