問題描述
我想檢測 NumberPicker
中的值何時更改.我的 PreferenceActivity
上有這段代碼:
I want to detect when the value from the NumberPicker
is changed. I have this code on my PreferenceActivity
:
public class MainPrefs extends PreferenceActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.addPreferencesFromResource(R.xml.main_preferences);
this.findPreference("SMSSentLimit").setOnPreferenceChangeListener(
new OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference,
Object newValue) {
TrackerService.updateStats(Long.decode(newValue.toString()));
return true;
}
});
this.findPreference("NumberPickerLimit").setOnPreferenceChangeListener(
new Preference.OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference,
Object newValue) {
Log.i("onPreferenceChange", "NumberPicker Changed");
Toast.makeText(getBaseContext(), "CHANGEEEED !!!",
Toast.LENGTH_SHORT).show();
return true;
}
});
}
}
第二個 (findPreference("NumberPickerLimit")
) 是 NumberPicker
,如果我將其更改為 onPreferenceClickListener
,它永遠(yuǎn)不會被調(diào)用它可以工作,但是當(dāng)我單擊首選項而不是更改值時,我會檢測到.
The second one (findPreference("NumberPickerLimit")
) is the NumberPicker
and it is never called, if I change it to onPreferenceClickListener
it works but I detect when I click the preference instead when I change the value.
根據(jù)源代碼應(yīng)該是這樣調(diào)用的:
Acording to source code it should be called:
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case DialogInterface.BUTTON_POSITIVE:
saveValue(mPicker.getCurrent());
break;
default:
break;
}
}
private void saveValue(int val) {
getEditor().putInt(getKey(), val).commit();
notifyChanged();
}
發(fā)生了什么事?是bug嗎?
What′s happening? Is it a bug?
編輯這是我的 XML:
<com.michaelnovakjr.numberpicker.NumberPickerPreference
android:key="NumberPickerLimit"
android:title="@string/NumberPickerTitle"
android:summary="@string/NumberPickerSummary"
picker:defaultValue="1"
picker:startRange="1"
picker:endRange="31" />
推薦答案
剛剛查看了您列出的 xml 文件 這里,看起來你有 android:key="demo.preference"
那里.而在此處的代碼中,您使用的是 findPreference("NumberPickerLimit")
.
Just looked at your xml file listed here, looks like you have android:key="demo.preference"
there. Whereas in the code here, you're using findPreference("NumberPickerLimit")
.
這篇關(guān)于如何使用 setOnPreferenceChangeListener 進行 QuietlyCoding NumberPicker?的文章就介紹到這了,希望我們推薦的答案對大家有所幫助,也希望大家多多支持html5模板網(wǎng)!