在哪里打我的通知

Question

我在哪里可以"调用"我的通知？我希望它在单击复选框xpreferenced时显示。编辑MainActivity.java

import...//here all imports i need
public class MainActivity extends Activity {
CheckBoxPreference firtsDependent;
...
public void onCreate(Bundle savedInstanceState){
  super onCreate(savedInstanceState);
  setContentView(R.layout.main);
  //and your code
}
}
    private void sendSimpleNotification(){ 
        boolean pref_opt1= PreferenceManager.getDefaultSharedPreferences(MainActivity.this).getBoolean("firstDependent", false);
        if(pref_opt1) {
            NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(service.this);
            notificationBuilder.setContentTitle("Title");
            notificationBuilder.setContentText("Context");
            notificationBuilder.setTicker("TickerText");
            notificationBuilder.setWhen(System.currentTimeMillis());
            notificationBuilder.setSmallIcon(R.drawable.ic_stat_icon);
            Intent notificationIntent = new Intent(this, service.class);
            PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
            notificationBuilder.setContentIntent(contentIntent);
            notificationBuilder.setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_LIGHTS | Notification.DEFAULT_VIBRATE);
            mNotificationManager.notify(1, notificationBuilder.build());
        } 
        else{
            mNotificationManager.cancel(SIMPLE_NOTIFICATION_ID);      
        }
    }

设置.java

import..//all imports i need
public class settings extends PreferenceActivity{
public void onCreate(Bundle savedInstanceState){
  super onCreate(savedInstanceState);
  setContentView(R.xml.settings);
  }
}

这是我的代码结构。。当然，我有一个xml，里面有带id和关键字firstDependent的checkbox xpreferences。

结束编辑我在onResume中尝试过，只有当我从首选项屏幕退出时才能工作。我怎样才能做我想做的事？

Answer 1

您需要一个类似以下的复选框侦听器：

cb = (CheckBox)findViewById(R.id.checkBox);
cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
   @Override
   public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
      sendSimpleNotification();
   }
}

对于复选框首选项，请使用：

final CheckBoxPreference cbPR= (CheckBoxPreference) getPreferenceManager().findPreference("cbPref");
cbPR.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {            
    public boolean onPreferenceChange(Preference preference, Object newValue) {
        sendSimpleNotification();
        return true;
    }
});

Answer 2

在您的PreferenceActivity onCreate中，注册一个首选项更改侦听器：

getSharedPreferences("YourPrefereceFile", 0).registerOnSharedPreferenceChangeListener(this);

然后，让您的活动实现OnSharedPreferenceChangeListener。

public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
        String key) {
    //Test on the key to know what preference has changed and do what ever you want
}

您修改了代码：

import..//all imports i need
public class settings extends PreferenceActivity implements OnSharedPreferenceChangeListener{
    public void onCreate(Bundle savedInstanceState){
      super onCreate(savedInstanceState);
      setContentView(R.xml.settings);
         PreferenceManager.getDefaultSharedPreferences(this).registerOnSharedPreferenceChangeListener(this);
      }
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
                String key) {
        // test on your wanted key preference
        // Call your notification methode
    }    
    }