小编mar*_*cin的帖子

我想实现一个滑动手势来删除ListView类似于android通知的行.

现在我只有一个ListView有onTouchListener-这么说,我已经有刷卡的检测工作.

gestureDetector = new GestureDetector(this, new GestureListener());
onTouchListener = new TouchListener();  
listview.setOnTouchListener(onTouchListener);  

我的GestureListener班级:

protected class GestureListener extends SimpleOnGestureListener
{
    private static final int SWIPE_MIN_DISTANCE = 150;
    private static final int SWIPE_MAX_OFF_PATH = 100;
    private static final int SWIPE_THRESHOLD_VELOCITY = 100;

    private MotionEvent mLastOnDownEvent = null;

    @Override
    public boolean onDown(MotionEvent e)
    {
        mLastOnDownEvent = e;
        return super.onDown(e);
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
    {
        if(e1 == …

我Wrap和一些Container孩子有一个布局。每个容器都有一个孩子，Text

所述Container具有固定的高度，但柔性的宽度。

如何垂直对齐Text内部Container？我尝试使用alignment: Alignment.centerLeft，但随后容器的宽度跨越了整个父级。

我无法设置 的宽度，Container因为我不知道文本的宽度。

Wrap(
      spacing: 3.0, // gap between adjacent chips
      runSpacing: 3.0, // gap between lines
      children: <Widget>[
        new Container(
          height: 30,
          alignment: Alignment.centerLeft,
          padding: EdgeInsets.symmetric(vertical: 5, horizontal: 10),
          decoration: BoxDecoration(
            color: Colors.grey[200],
            borderRadius: BorderRadius.circular(15),
          ),
          child: Text(
            'hallo',
            style: TextStyle(background: _paint,),
          ),
        ),
        ...

它应该是这样的 - 但红色文本应该垂直居中：

这段代码有什么问题？
我尝试将长时间点击监听器添加到列表视图,但由于某些原因无法正确:

package ch.futurecom.adaptertest;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class AdapterTestActivity extends ListActivity
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        ListView lv = getListView();

        lv.setLongClickable(true);
        lv.setOnLongClickListener(new OnLongClickListener()
        {
            @Override
            public boolean onLongClick(View v)
            {
                Toast.makeText(AdapterTestActivity.this, "long clicked", Toast.LENGTH_SHORT).show();
                return true;    
            }
        });

        lv.setAdapter(new ArrayAdapter<String>(this,R.layout.row,getResources().getStringArray(R.array.items)));
    }
}

pastebin links:
AdapterTestActivity.java - > http://pastebin.com/Pw30EkEz
row.xml - > http://pastebin.com/6FajncHT

谢谢!