我的目標是在主屏幕上顯示「飛行模式」小部件,以便用戶可以打開/關閉飛行模式;該小部件顯示飛行模式的當前狀態(打開,關閉或轉換)。爲了做到這一點,我註冊,聽取他們對我的appwidget提供商「的onUpdate」回調手機狀態變化:在appWidget中監聽手機狀態變化
mTelephonyManager.listen(mPhoneStateListener, PhoneStateListener.LISTEN_SERVICE_STATE);
,我通過重寫「mPhoneStateListener.onServiceStateChanged」回調更新小部件UI。
@Override
public void onServiceStateChanged(ServiceState serviceState) {
super.onServiceStateChanged(serviceState);
switch (serviceState.getState()) {
case ServiceState.STATE_POWER_OFF:
currentAirplaneModeState = AIRPLANE_MODE_ON;
Log.d(APP_ID, "serviceState: "+serviceState.getState()+": STATE_POWER_OFF");
break;
case ServiceState.STATE_IN_SERVICE:
currentAirplaneModeState = AIRPLANE_MODE_OFF;
Log.d(APP_ID, "serviceState: "+serviceState.getState()+": STATE_IN_SERVICE");
break;
case ServiceState.STATE_OUT_OF_SERVICE:
currentAirplaneModeState = AIRPLANE_MODE_IN_UNDETERMINED;
Log.d(APP_ID, "serviceState: "+serviceState.getState()+": STATE_OUT_OF_SERVICE");
break;
case ServiceState.STATE_EMERGENCY_ONLY:
currentAirplaneModeState = AIRPLANE_MODE_ON;
Log.d(APP_ID, "serviceState: "+serviceState.getState()+": STATE_EMERGENCY_ONLY");
break;
default:
Log.d(APP_ID, "serviceState: default: "+serviceState.getState());
break;
}
updateWidget(mContext);
}
該方法確實更新小部件,但並非全部。它需要幾個狀態轉換才能切換飛行模式,但我的小部件常常停留在「轉換」模式,因爲一旦上述代碼返回,Android似乎認爲監聽器的工作已完成並將終止偵聽器。在整個轉換週期完成之前,保持電話聽衆的最佳方法是什麼?或者有更好的方法嗎?
請您詳細說明我如何設置它?我創建了一個測試項目,其中只有一個接收器: <使用權限android:name =「android.permission.READ_PHONE_STATE」> uses-permission>但是當我從手機改變飛行模式時,接收者的onReceive處理程序似乎不會被調用設置。我錯過了什麼? –
mobileTofu
2011-05-30 19:30:48
@mobileTofu:有可能'ACTION_PHONE_STATE_CHANGED'只廣播振鈴/摘機事件。嘗試從DDMS接收模擬器中的電話,然後查看是否調用了您的接收器。如果是這樣,那麼'ACTION_PHONE_STATE_CHANGED'將不適用於你的場景,在這種情況下'AlarmManager'輪詢是下一個選項。 – CommonsWare 2011-05-30 19:48:07
撥打電話確實會觸發接收器(意圖操作「android.intent.action.PHONE_STATE」)。 – mobileTofu 2011-05-30 22:00:46