android多选列表在滚动时选择随机元素

时间:2013-10-29 21:03:20

标签: android listview checkboxlist

我有一个简单的传感器列表,带有复选框

如果我选择任何传感器,然后向上和向下滚动列表,检查的传感器会发生变化,有时我会看到更多的传感器被检查,有时候没有任何传感器会被检查。所有这一切只需通过上下滚动列表来完成。

这是仍然存在sam问题的最小程序:

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ArrayList<String> sensors = new ArrayList<String>();
        SensorManager mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
        List<Sensor> mSensorList = mSensorManager.getSensorList(Sensor.TYPE_ALL);

        for (Sensor s : mSensorList) {
            sensors.add(s.getName());
        }

        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice, sensors);

        ListView mSensorListView = ((ListView) findViewById(R.id.sensorListView));
        mSensorListView.setAdapter(arrayAdapter);

        mSensorListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                CheckedTextView check = (CheckedTextView) view;
                check.setChecked(!check.isChecked());

                // this only logs when I actually click on a sensor. now when I scroll.
                Log.v("SENSOR CLICKED: ", check.getText() + "  " + position);
            }
        });

    }

}

这是布局:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">

    <ListView
        android:id="@+id/sensorListView"
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_marginTop="20dp"
        android:layout_height="300dp"
        android:background="#dadde0">

    </ListView>

</RelativeLayout>

任何想法如何让这件事能正常工作?

1 个答案:

答案 0 :(得分:2)

您必须创建一个自定义适配器视图持有者类,其中包含布局视图对象以及位置并重复使用它。

请遵循以下示例:http://sunil-android.blogspot.in/2013/04/android-listview-checkbox-example.html