Android:ArrayAdapter 中的 onClickListener 没有响应

Question

我创建了一个 Activity ，创建了 ListView 并设置了 setItemsCanForus()方法设置为 true，以便适配器中的每个 View 都可以有自己的 onclicklisteners。我设法列出了列表，但现在 View 没有响应点击。

这是 Activity 的一部分。

private ArrayList<String> filePath;
private ListView lv;

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

    **filePath = new ArrayList<>();
    lv = (ListView) findViewById(R.id.find_video_list);
    fetchVideoList();
    lv.setItemsCanFocus(true);**
}

private void fetchVideoList() {
    String[] projection = {
            MediaStore.Video.Thumbnails._ID
    };
    // Create the cursor pointing to the SDCard
    Cursor cursor = getContentResolver().query(MediaStore.Video.Thumbnails.EXTERNAL_CONTENT_URI,
            projection, // Which columns to return
            null,       // Return all rows
            null,
            MediaStore.Video.Thumbnails.VIDEO_ID);

    assert cursor != null;
    cursor.close();

    filePath = getFilePaths();

    VideoFromDeviceItem adapter = new VideoFromDeviceItem(FindVideoActivity.this, filePath);
    **lv.setAdapter(adapter);**
}

这是扩展 ArrayAdapter<String> 的类类。

public class VideoFromDeviceItem extends ArrayAdapter<String> {
    private final Activity context;
    private final ArrayList<String> filePaths;

    public VideoFromDeviceItem(Activity context, ArrayList<String> filePaths) {
        super(context, R.layout.video_item, filePaths);
        this.context = context;
        this.filePaths = filePaths;
    }

    @Override
    public View getView(final int position, View view, ViewGroup parent) {
        LayoutInflater inflater = context.getLayoutInflater();
        View rowView = inflater.inflate(R.layout.upload_list, null, true);

        VideoView videoItem = (VideoView) rowView.findViewById(R.id.videoItem);
        TextView tvFilePath = (TextView) rowView.findViewById(R.id.tvFilePath);
        TextView tvVideoRunningTime = (TextView) rowView.findViewById(R.id.tvVideoRunningTime);

        videoItem.setVideoPath(filePaths.get(position));
        videoItem.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(context, position, Toast.LENGTH_SHORT).show();
            }
        });

        // remove the file path and simply get the file name.
        String fullPath = filePaths.get(position);
        String shortName = new File(fullPath).getName();
        tvFilePath.setText(shortName);

        // get the running time of the video.
        long runningTime = getVideoRunningTime(filePaths.get(position));
        String strRunningTime = fromMillisecToFormattedTime(runningTime);
        tvVideoRunningTime.setText(strRunningTime);

        return rowView;
    }

正如你在上面看到的，我设置了一个 OnClickListener()到带有 toast 消息的视频 View ，只是为了测试听众是否真的在响应。并且没有来自点击的响应。

Answer 1

尝试改变这个:

private final Activity context;

为此:

private final Context context;

还有你的构造函数:

public VideoFromDeviceItem(Context context, ArrayList<String> filePaths) {
    super(context, R.layout.video_item, filePaths);
    this.context = context;
    this.filePaths = filePaths;
}

编辑

您可以改用它:

videoItem.setOnTouchListener(new View.OnTouchListener()
{
    @Override
    public boolean onTouch(View v, MotionEvent event) {

        Toast.makeText(context, String.valueOf(position), Toast.LENGTH_SHORT).show();

        return false;
    }
});

Why the onTouchListener() not onClickListener() in this case?

onClickListener() 存在一些错误，因为它是一个 VideoView...所以执行 onClickListener() 的最佳方法是onTouchListener() 但是 如果你想要 onClickListener() 只需在你的 中添加一个 Button VideoView 或任何地方，您可以在其上设置 setOnClickListener()。