如何动态修改FooterView的首选项？-HowtomodifypreferenceofaFooterViewdynamically?

Very basic question: I'm trying to enable/disable the FooterView of a ListView dynamically. Basically I would like to make it clickable through the setEnable(true/false) function as soon as the LocationListener acquires a new location. I was thinking about a public method that get called from within the LocationListener.onLocationChange() method, with no return but it has to change the FooterView preference, but I can't figure out how to code it, and if it could work. Any suggestions?

非常基本的问题:我正在尝试动态启用/禁用ListView的FooterView。基本上我想在LocationListener获取新位置后通过setEnable(true / false)函数使其可单击。我正在考虑从LocationListener.onLocationChange()方法中调用的公共方法,没有返回,但它必须更改FooterView首选项,但我无法弄清楚如何编写它,以及它是否可以工作。有什么建议?

In onCreate:

@Override
protected void onCreate(Bundle bundle) {
    LayoutInflater inflater = (LayoutInflater)getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    TextView footerView = (TextView)inflater.inflate(R.layout.footer_view, null);
    myListView.addFooterView(footerView);
    //if (!enabler) footerView.setEnabled(false);
    //else footerView.setEnabled(true);
    footerView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {}
    });
}

The LocationListener methods

LocationListener方法

@Override
public void onLocationChanged(Location currentLocation) {
    if (null == mLastLocationReading || mLastLocationReading.getTime() > currentLocation.getTime()){
        mLastLocatiOnReading= currentLocation;
        enabler=true;
    }
    if (currentLocation.getTime() > mLastLocationReading.getTime())
        mLocationManager.removeUpdates(this);
}

So even if the Listener find a new location it doesn't trigger the if condition enabling the footerView (where I commented out the code). I tried to access footerView.setEnable from a method with no joy. Any help would be very much appreciated.

因此,即使监听器找到一个新位置,它也不会触发启用footerView的if条件(我在其中注释掉了代码)。我试图从没有快乐的方法访问footerView.setEnable。任何帮助将非常感谢。

1 个解决方案

class YourActivity extends Activity implements LocationListener {

    private TextView footerView;

    @Override
    protected void onCreate(Bundle bundle) {
        LayoutInflater inflater = (LayoutInflater)getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        footerView = (TextView)inflater.inflate(R.layout.footer_view, null);
        myListView.addFooterView(footerView);
        footerView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {}
        });
    }

    @Override
    public void onLocationChanged(Location currentLocation) {
        if (null == mLastLocationReading || mLastLocationReading.getTime() > currentLocation.getTime()){
            mLastLocatiOnReading= currentLocation;
            enableFooterView(true);
        }
        if (currentLocation.getTime() > mLastLocationReading.getTime())
            mLocationManager.removeUpdates(this);
    }

    private void enableFooterView(boolean enable) {
        footerView.setEnabled(enable);
    }
}