我有一个设置首选项屏幕,它有一个ListPreference和一个CheckBoxPreference。选择ListPreference的项目时,我想更改应用程序的日期格式。另外,我想通过CheckBoxPreference在状态栏上显示/隐藏通知。任何人都可以告诉我要实现这一目标需要做什么。
另外,如何将工具栏添加到首选项屏幕?我被困在这里。请帮忙。提前致谢。
我被困在这里。请帮忙。
提前致谢。
MainActivity.java
public void setCurrentDateOnView() {
String dateFormat = "dd - MM - yyyy";
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(dateFormat, Locale.US);
tv_Current_Date.setText(simpleDateFormat.format(calendar_now.getTime()));
String short_weekday = new DateFormatSymbols().getShortWeekdays()[day_of_current_week];
tv_Current_weekday.setText(short_weekday);
til_Current_Date.setError(null);
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
Intent intent_settings = new Intent(this, SettingsActivity.class);
startActivity(intent_settings);
Toast.makeText(this, "You have clicked on settings action menu.", Toast.LENGTH_SHORT).show();
break;
}
return super.onOptionsItemSelected(item);
}
SettingsActivity.java
public class SettingsActivity extends PreferenceActivity
implements SharedPreferences.OnSharedPreferenceChangeListener {
NotificationManager mNotifyManager;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Display the fragment as the main content.
getFragmentManager().beginTransaction()
.replace(android.R.id.content, new SettingsFragment())
.commit();
PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
boolean notifyEnabled = sharedPreferences.getBoolean("pref_cb_notification", true);
mNotifyManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
if (notifyEnabled) {
//Show notification
showNotification();
}
else {
//Hide notification
hideNotification();
}
}
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
boolean isChecked = sharedPreferences.getBoolean("pref_cb_notification", false);
if (isChecked) {
//Show notification
showNotification();
}
else {
//Hide notification
hideNotification();
}
}
public static class SettingsFragment extends PreferenceFragment implements SharedPreferences.OnSharedPreferenceChangeListener{
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Load the preferences from an XML resource
addPreferencesFromResource(R.xml.preferences);
}
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
}
}
//Method to show notification
public void showNotification() {
NotificationCompat.Builder mBuilder = (NotificationCompat.Builder)
new NotificationCompat.Builder(SettingsActivity.this)
.setSmallIcon(R.drawable.ic_notifications_white_24dp)
.setContentTitle("My Application")
.setSubText("Tap to start");
Intent resultIntent = new Intent(SettingsActivity.this, MainActivity.class);
PendingIntent resultPendingIntent = PendingIntent
.getActivity(SettingsActivity.this, 0, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);
//System.currentTimeMillis();
mBuilder.setContentIntent(resultPendingIntent);
Notification notification = mBuilder.build();
notification.flags |= Notification.FLAG_NO_CLEAR | Notification.FLAG_ONGOING_EVENT;
//notification.flags |= Notification.FLAG_AUTO_CANCEL;
mNotifyManager.notify(1, notification);
}
//Method to hide notification
public void hideNotification() {
mNotifyManager.cancel(1);
}
}
Settings image
最佳答案
要添加工具栏,您只需要在活动的布局文件中使用协调器布局即可。偏好活动具有与其他活动一样的简单布局,您只需在容器内填充偏好片段。