当我使用getApplicationContext()
时,eclipse会给我错误create method 'getApplicationContext()'
。请告诉我如何删除此错误。我也尝试使用 ClassName.this 那个时间错误,例如change method startListening(Context) to startListening(Main)
当我使用时:measurement_index = AppSettings.getMeasureUnit(this);
然后出现错误:change method getMeasureUnit(Context) to getMeasureUnit(Main)
所以请让我知道如何解决错误:
创建方法'getApplicationContext()'
将方法getMeasureUnit(Context)更改为getMeasureUnit(Main)
检查我的代码。
Main.class
public class Main extends Fragment implements GPSCallback{
.......
public static Fragment newInstance(int position) {
Main f = new Main();
Bundle args = new Bundle();
...
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final ViewGroup root = (ViewGroup) inflater.inflate(R.layout.main, null);
/*Intent in = new Intent(Main.this,MainDisplay.class);
// ------------> Here give error like : Remove arguments match to Intent();
startActivity(in);*/
tv_display_Speed = (TextView) root.findViewById(R.id.speed_display);
gpsManager = new GPSManager();
gpsManager.startListening(getApplicationContext());
//------------> Eclipse give me error create method 'getApplicationContext()'
gpsManager.setGPSCallback(this);
//(TextView)root.findViewById(R.id.speed_display);
measurement_index = AppSettings.getMeasureUnit(this);
//------------> Here Give me error like : change method getMeasureUnit(Context) to getMeasureUnit(Main)
btnstart = (Button) root.findViewById(R.id.button_start);
btnstart.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
return root;
}
startListening 方法:
public void startListening(final Context context)
{
....
}
getMeasureUnit 方法:
public static int public static int getMeasureUnit(Context context){
return getInt(context,AppSettings.UNIT_STRING);
}
编辑:
我在上面的类中添加了onStart()
方法,扩展了fragment。
在runOnUiThread(updateTask);
Eclipse的那个时间给出了如下错误:create method runOnUiThread(Runnable)
。请让我知道如何实现这一目标。
@Override
public void onStart() {
super.onStart();
timer = new Timer("DigitalClock");
Calendar calendar = Calendar.getInstance();
// Get the Current Time
final Runnable updateTask = new Runnable() {
public void run() {
txt_display_clock.setText(getCurrentTimeString()); // shows the current
// time of the day
}
};
// update the UI
int msec = 999 - calendar.get(Calendar.MILLISECOND);
timer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
runOnUiThread(updateTask); // <---------------- HERE
}
}, msec, 1000);
}
答案 0 :(得分:5)
在片段中,您可以改为使用getActivity().getApplicationContext()
。
对于AppSettings.getMeasureUnit错误,如果getMeasureUnit方法需要上下文,则通常可以使用getActivity().getApplicationContext()
。