我想在 aynctask 中更新我的 textView,但它根本没有更新。我无法找出我的错误。
这是我的代码:
注意: - 当我的应用失去焦点并重新获得焦点时,UI 会更新。奇怪的问题
public class LocateGeopoint extends AsyncTask<LatLng, String, List<Address>> {
Geocoder geocoder;
private TextView tv;
public LocateGeopoint(View v) {
this.geocoder = new Geocoder(v.getContext());
this.tv = (TextView) v.findViewById(R.id.textView1);
}
@Override
protected void onPostExecute(List<Address> addresses) {
super.onPostExecute(addresses);
if(addresses!=null){
String city = addresses.get(0).getAddressLine(0);
String country = addresses.get(0).getAddressLine(1);
System.out.println(city+" "+country);
tv.setText(city);
}
}
@Override
protected List<Address> doInBackground(LatLng... params) {
// TODO Auto-generated method stub
double lattitude = params[0].latitude;
double longitude = params[0].longitude;
List<Address> addresses = null;
if (lattitude != 0 || longitude != 0) {
try {
addresses = geocoder.getFromLocation(lattitude, longitude, 1);
} catch (IOException e) {
e.printStackTrace();
}
}
return addresses;
}
}
XML 文件(膨胀的一个)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/parent_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
<FrameLayout
android:id="@+id/view_container"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="true"
android:text="Loading Address.." />
</FrameLayout>
这是我从主要活动中调用 Asyntask 的方式
googleMap.setInfoWindowAdapter(new InfoWindowAdapter() {
@Override
public View getInfoWindow(Marker arg0) {
return null;
}
@SuppressWarnings("unchecked")
@Override
public View getInfoContents(Marker marker) {
LayoutInflater inflater = (LayoutInflater) MapsDemo.this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = inflater.inflate(R.layout.custom_info, null);
new LocateGeopoint(v).execute(marker.getPosition());
return v;
}
});
当我调试应用程序时,它会更新,但通常不会。