java - 我有一个视频库尝试从特定目录获取视频文件我收到错误参数无法解析为变量

Question

我正在制作一个视频库，试图从特定目录获取视频文件我收到错误参数无法解析为变量这是我的画廊活动代码。我是 java 新手，我的英语不是那么好。提前感谢您的帮助。

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;

public class Main extends Activity implements OnItemClickListener {
  Cursor cursor;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    String selection=MediaStore.Video.Media.DATA +" like?";
    String[] selectionArgs=new String[]{"/storage/sdcard0/phd"};
    cursor = managedQuery(MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
            parameters, selection, selectionArgs, MediaStore.Video.Media.DATE_TAKEN + " DESC");



    ListView listView = (ListView) this.findViewById(R.id.ListView);

    String[] thumbColumns = { MediaStore.Video.Thumbnails.DATA,
        MediaStore.Video.Thumbnails.VIDEO_ID };

    String[] mediaColumns = { MediaStore.Video.Media._ID,
        MediaStore.Video.Media.DATA, MediaStore.Video.Media.TITLE,
        MediaStore.Video.Media.MIME_TYPE };


    cursor = managedQuery(MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
        mediaColumns, null, null, null);

    ArrayList<VideoViewInfo> videoRows = new ArrayList<VideoViewInfo>();

    if (cursor.moveToFirst()) {
      do {

        VideoViewInfo newVVI = new VideoViewInfo();
        int id = cursor.getInt(cursor.getColumnIndex(MediaStore.Video.Media._ID));
        Cursor thumbCursor = managedQuery(
            MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI,
            thumbColumns, MediaStore.Video.Thumbnails.VIDEO_ID
                + "=" + id, null, null);
        if (thumbCursor.moveToFirst()) {
          newVVI.thumbPath = thumbCursor.getString(thumbCursor
              .getColumnIndex(MediaStore.Video.Thumbnails.DATA));
          Log.v("", newVVI.thumbPath);
        }

        newVVI.filePath = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));
        newVVI.title = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.TITLE));
        Log.v("", newVVI.title);
        newVVI.mimeType = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE));
        Log.v("", newVVI.mimeType);
        videoRows.add(newVVI);
      } while (cursor.moveToNext());
    }
    listView.setAdapter(new VideoGalleryAdapter(this, videoRows));
    listView.setOnItemClickListener(this);
  }

  public void onItemClick(AdapterView<?> l, View v, int position, long id) {
    if (cursor.moveToPosition(position)) {
      int fileColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
      int mimeColumn = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.MIME_TYPE);
      String videoFilePath = cursor.getString(fileColumn);
      String mimeType = cursor.getString(mimeColumn);
      Intent intent = new Intent(android.content.Intent.ACTION_VIEW);
      File newFile = new File(videoFilePath);
      intent.setDataAndType(Uri.fromFile(newFile), mimeType);
      startActivity(intent);
    }
  }
}
class VideoViewInfo {
  String filePath;
  String mimeType;
  String thumbPath;
  String title;
}

class VideoGalleryAdapter extends BaseAdapter {
  private Context context;
  private List<VideoViewInfo> videoItems;

  LayoutInflater inflater;

  public VideoGalleryAdapter(Context _context,
      ArrayList<VideoViewInfo> _items) {
    context = _context;
    videoItems = _items;

    inflater = (LayoutInflater) context
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  }

  public int getCount() {
    return videoItems.size();
  }

  public Object getItem(int position) {
    return videoItems.get(position);
  }

  public long getItemId(int position) {
    return position;
  }

  public View getView(int position, View convertView, ViewGroup parent) {
    View videoRow = inflater.inflate(R.layout.row, null);
    ImageView videoThumb = (ImageView) videoRow
        .findViewById(R.id.ImageView);
    if (videoItems.get(position).thumbPath != null) {
      videoThumb.setImageURI(Uri
          .parse(videoItems.get(position).thumbPath));
    }

    TextView videoTitle = (TextView) videoRow
        .findViewById(R.id.TextView);
    videoTitle.setText(videoItems.get(position).title);

    return videoRow;
  }
}