我的首选活动中有两个。
我的问题是当我更新一个项目时,新值不会反映在屏幕上。
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.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;
}
}
最佳答案
呼叫
preference.notifyChanged();
当其数据更改时,应重新绘制。
关于android - 如何在EditTextPreference更改时显示新值,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/7568848/