小编sas*_*cha的帖子

仍然是相对较新的我在我的活动类MainActivity中使用的非活动类MyLocation中找到视图时遇到问题.我正在使用MyLocation来获取经度和纬度.我想在使用GPS或网络时突出显示文本视图.为此,我需要在非活动类MyLocation中查找textviews.

以下是我在MainActivity中调用它的方式:

public class MainActivity extends ActionBarActivity implements LocationListener {

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

            MyLocation myLocation = new MyLocation();
            myLocation.getLocation(this, locationResult);

}

在这里我在MyLocation中尝试查找textviews:

public class MyLocation {

LocationManager lm;
LocationResult locationResult;
private Context context;
TextView tvnetwork, tvgps;
private int defaultTextColor;

LocationListener locationListenerNetwork = new LocationListener() {
    public void onLocationChanged(Location location) {

        locationResult.gotLocation(location);

        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View v = inflater.inflate(R.layout.main, null);

        tvnetwork = (TextView) v.findViewById(R.id.tvnetwork);
        tvgps = (TextView) v.findViewById(R.id.tvgps);
        defaultTextColor = tvgps.getTextColors().getDefaultColor();

        tvnetwork.setTextColor(context.getResources().getColor(
                R.color.green)); …

我想在自定义首选项屏幕中显示首选项的值.为此,我需要在首选项片段中获取值,在本例中为字符串.在非片段(活动)中,我使用eg获取值final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);并获取字符串,String phonenumber = prefs.getString("preference_name", null);但在首选项片段getDefaultSharedPreferences中不适用于首选项片段.

不知道怎么解决这个问题？

这是我的代码片段:

public class PreferencesFragment extends PreferenceFragment implements
    OnSharedPreferenceChangeListener {

TextView tvusername, tvphonenumber;     

@Override
   public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     addPreferencesFromResource(R.xml.preferences);
     getPreferenceScreen().getSharedPreferences()
            .registerOnSharedPreferenceChangeListener(this);

     final SharedPreferences prefs = PreferenceManager
            .getDefaultSharedPreferences(this);


    // entering preference phonenumber in text view
            String phonenumber = prefs.getString("phonenumber", null);
            ;
            tvphonenumber.setText(phonenumber);

    // entering preference username in text view
            String username = prefs.getString("username", null);
            ;
            tvusername.setText(username);

}