我在我的应用程序中设置了一个首选项屏幕作为设置选项,但是当用户选择或更改选项时,我对如何完成更改感到困惑。
以下是我的PreferenceScreen的xml代码:
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
<PreferenceCategory android:title="Notifications">
<RingtonePreference
android:summary="Choose a Ringtone"
android:title="Notification Ringtone"
android:key="ringtonePref" />
<ListPreference
android:title="Notification Timer"
android:summary="Select when to Notify"
android:dialogTitle="Show Notification after every:"
android:positiveButtonText="OK"
android:negativeButtonText="Cancel"
android:entries="@array/entries"
android:entryValues="@array/entries"
android:key="listPrefs" />
<ListPreference
android:title="LED Color"
android:summary="Choose LED Color"
android:positiveButtonText="OK"
android:negativeButtonText="Cancel"
android:entries="@array/colors"
android:entryValues="@array/colors"
android:key="listPrefs2" />
<CheckBoxPreference
android:title="LED"
android:defaultValue="true"
android:summary="Flash LED or Not"
android:key="checkBoxPrefs2"/>
<CheckBoxPreference
android:title="Vibrate"
android:defaultValue="true"
android:summary="Vibrate on receiving Notification"
android:key="checkBoxPrefs3" />
</PreferenceCategory>
<PreferenceCategory android:title="Invite">
<Preference android:summary="Send invitation to more peoples so that\nthey can also Learn more and more Duas."/>
</PreferenceCategory>
<PreferenceCategory android:title="Version">
<Preference
android:key="versionPrefs"
android:summary="Version 1.0\nThank you for Downloading the App." />
</PreferenceCategory>
</PreferenceScreen>
,这是我的Settings.class:
public class Settings extends PreferenceActivity implements OnPreferenceChangeListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.settings);
//setting the properties of Action Bar
ActionBar actionBar = getActionBar();
actionBar.setTitle(Html.fromHtml("<font color='#FFFFFF'><strong>Settings</strong></font>"));
actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#33B5E5")));
actionBar.setDisplayHomeAsUpEnabled(true);
PreferenceManager.setDefaultValues(this, R.xml.settings, true);
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
// TODO Auto-generated method stub
return false;
}
}
我不知道我应该在onPreferenceChange上添加什么代码,以使我的偏好设置真正进行更改。
请告诉我。
任何帮助都会非常 赞赏 。
感谢您宝贵的时间。
答案 0 :(得分:1)
关于您的PreferenceActivity
CheckBoxPreference
OnPreferenceChangeListener
以下是一个例子:
CheckBoxPreference checkBoxPrefs3 = (CheckBoxPreference) findPreference("checkBoxPrefs3");
checkBoxPrefs3.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference, Object o) {
if ((Boolean) o) {
checkBoxPrefs3.setChecked(true);
// TODO vibrate
} else {
checkBoxPrefs3.setChecked(false);
}
return false;
}
});
答案 1 :(得分:1)
振动
CheckBoxPreference checkBoxPrefs3 = (CheckBoxPreference) findPreference("checkBoxPrefs3");
checkBoxPrefs3.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference, Object o) {
if ((Boolean) o) {
checkBoxPrefs3.setChecked(true);
// vibration for 800 milliseconds
((Vibrator)getSystemService(VIBRATOR_SERVICE)).vibrate(800);
// TODO vibrate
} else {
checkBoxPrefs3.setChecked(false);
}
return false;
}
});
在AndroidManifest.xml文件中添加所需的权限:
<uses-permission android:name="android.permission.VIBRATE" />
如何申请您的应用程序?
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
boolean vibrate = sharedPrefs.getBoolean("checkBoxPrefs3", true);
Notification notification = new Notification(icon,
"message", when);
notification.defaults |= Notification.DEFAULT_SOUND;
if (vibrate) {
notification.defaults |= Notification.DEFAULT_VIBRATE;
}
notification.setLatestEventInfo(mContext,
"ticker",
"message", contentIntent);
notification.flags = Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(count, notification);
答案 2 :(得分:0)
Android会自动将其保存到SharedPreferences
。
您始终可以致电:
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(getContext());
boolean led = sharedPrefs.getBoolean("checkBoxPrefs2", true);
其中checkBoxPrefs2
是在您的布局中定义的键,true
是默认值。