setText not working for EditTextPreference

问题

I'm trying to set value for EditTextPreference item

with hostPreference.setText("Not yet set");

But text is not showing

I want to show it like Use Name here

public class HostSettingActivity extends PreferenceActivity {

    private final String MY_DEBUG_TAG = "SettingActivity";
    SharedPreferences sharedPrefs;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.i(MY_DEBUG_TAG, "HostSettingActivity Started");
        super.onCreate(savedInstanceState);
        sharedPrefs = getPreferenceManager().getSharedPreferences(); 
        setPreferenceScreen(createPreferenceHierarchy());
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.e(MY_DEBUG_TAG, "On Destroy");
    }

    private PreferenceScreen createPreferenceHierarchy() {

        // Root
        PreferenceScreen root = getPreferenceManager().createPreferenceScreen(this);

        PreferenceCategory dialogBasedPrefCat = new PreferenceCategory(this);
        dialogBasedPrefCat.setTitle("Host Settings");
        root.addPreference(dialogBasedPrefCat);

        EditTextPreference hostPreference = new EditTextPreference(this);
        hostPreference.setKey("host");
        hostPreference.setDialogTitle("Host");
        hostPreference.setText("Not yet set");
        hostPreference.setDefaultValue("http://example.com");
        hostPreference.setSummary("Set host");
        dialogBasedPrefCat.addPreference(hostPreference);

        EditTextPreference portPreference = new EditTextPreference(this);
        portPreference.setKey("port");
        portPreference.setDialogTitle("Port");
        portPreference.setDefaultValue("8080");
        portPreference.setSummary("Set port");
        dialogBasedPrefCat.addPreference(portPreference);

        hostPreference.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
            @Override
            public boolean onPreferenceChange(Preference preference, Object newValue) {
                EditTextPreference etp = (EditTextPreference) preference;

                String newHostValue = newValue.toString();
                Log.i(MY_DEBUG_TAG, "New Host: "+newHostValue);
                etp.setText(newHostValue);
                return true;
            }
        });
        return root;
    }

}

回答1:

Text is not seen in EditTextPreference, but can be edited.

What is seen is TITLE, and it is set by setTitle.

If you want to display your edited text in title, you must set it as title yourself.

回答2:

I think you're confusing setText with setTitle...

来源：https://stackoverflow.com/questions/7569185/settext-not-working-for-edittextpreference