更改传感器事件时,ListItem Click事件不会触发或响应非常慢

时间:2013-05-09 10:23:55

标签: android events listview sensor

我有一个应用程序,当设备被旋转时,即onSensorChanged()时,我试图通过自定义列表适配器显示其中填充了一些动态数据的ListView。旋转设备时,ListView中的数据将相应地动态更新ListView中的数据。我能够生成动态数据,但是当单击ListItem时,似乎无法识别click事件。

为什么会这样?单击ListItem时,我想执行另一个详细说明单击的列表项数据的活动。

这是我的代码,

 public void onSensorChanged(SensorEvent event) {
    TextView txtangle = (TextView) findViewById(R.id.txtangle);
    if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {

        // Log.v("ACCELEROMETER", "ACCELEROMETER");

        mGravity = event.values;

    }

    if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {

        // Log.v("MAGNETIC_FIELD", "MAGNETIC_FIELD");

        mGeomagnetic = event.values;

    }

    if (mGravity != null && mGeomagnetic != null) {

        float first[] = new float[9];

        float second[] = new float[9];

        boolean success = SensorManager.getRotationMatrix(first, second,
                mGravity, mGeomagnetic);

        if (success) {

            float orientation[] = new float[3];

            SensorManager.getOrientation(first, orientation);

            azimuth = orientation[0]; // orientation contains: azimut, pitch
                                        // and roll
        }
    }
    mycallback(event);
  }

  public void mycallback(SensorEvent event) {

    ListView propertylistview = (ListView) findViewById(R.id.listview);
    PropertiesArray = new ArrayList<Propety>(4);
    PropertiesArray.add(new Propety("Banjara Hills",
            "Price: 100000"));
    PropertiesArray.add(new Propety("Jubilee Hills",
            "Price: 200000"));
    PropertiesArray.add(new Propety("Film Nagar", "Price: 70000"));
    PropertiesArray.add(new Propety("Kukatpally", "Price: 50000"));
    PropertiesArray.add(new Propety("Jubilee Hills",
            "Price: 200000"));
    PropertiesArray.add(new Propety("Film Nagar", "Price: 70000"));
     customadapter customlistview = new customadapter(
            PropertiesArray); // customadapter is the Custom List Adapter
    propertylistview.setAdapter(customlistview);

}   //This is the hardcoded data. 

我的习惯用语类

 public class customadapter extends BaseAdapter {
LayoutInflater inflater;
ArrayList<Propety> PropertiesArray;

public customadapter(ArrayList<Propety> PropertiesArray) {  

   this.PropertiesArray=PropertiesArray;

}
@Override
public int getCount() {

    return PropertiesArray.size();
}

@Override
public Object getItem(int position) {

    return PropertiesArray.get(position);
}

@Override
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}

@Override
public View getView(final int position, View View, final ViewGroup parent) {

     if (View == null) {
            LayoutInflater inflater = LayoutInflater.from(parent.getContext());
            View = inflater.inflate(R.layout.customlistview, parent, false);
        }
      final Propety ListArray = PropertiesArray.get(position);
      TextView tvPropertyName = (TextView) View.findViewById(R.id.tvCity);
       tvPropertyName.setText(ListArray.getName());

        TextView tvPrice = (TextView) View.findViewById(R.id.tvprice);
        tvPrice.setText(ListArray.getPrice());

       ImageView imgProperty = (ImageView) View.findViewById(R.id.list_image);
       imgProperty.setImageResource(R.drawable.ic_launcher);

       View.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            Toast.makeText(parent.getContext(), "view clicked: "+ ListArray.getName(), Toast.LENGTH_SHORT).show();

        }   // This is not firing. Toast is not being displayed. 
    });
    return View;
}

}

我希望每当更换传感器或旋转设备时都会更新此数据。但这似乎是一个不正确的实施。

任何人都可以纠正我或建议一个好的方法。我是android的新手。   这对我来说很难!!   任何帮助将不胜感激。

1 个答案:

答案 0 :(得分:0)

我也不是机器人专家,但每当我遇到这类问题时,我都会使用the Android logging mechanism ,即Log.d(String tag, String msg)来帮我弄清楚出了什么问题。因此,我建议您通过代码大量放入一大堆Log.d语句,并使用输出来解决问题。