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我遇到的問題是，當我調試我的小部件時，它會更改佈局，但是當我簡單地運行它時，它不起作用。根據我的調試消息，它設置了setOnClickPendingIntent，但它不啓動我的服務。Android appwidget在運行時沒有啓動服務
總之，我的小部件只在調試時才起作用。
這裏是我的小部件代碼：
public class Widget extends AppWidgetProvider {
public static String SWITCH_SCREEN1 = "1";
public static String SWITCH_SCREEN2 = "2";
public static final String ADD_NOTE = "addNote";
public static final String MANAGE_REMINDERS = "manageReminders";
public static String TAKE_PICTURE = "takePicture";
private static int LAYOUTID = R.layout.widget_screen1;
/**
* This method is called when a widget is added to the home screen.
* It sets the listeners on the items and updates the screen with info from the database
*/
@Override
public void onEnabled(Context context) {
super.onEnabled(context);
setListeners(context);
updateScreenFromDatabase(context, AppWidgetManager.getInstance(context), AppWidgetManager.getInstance(context).getAppWidgetIds(new ComponentName(context, Widget.class)));
}
/**
* This method is called to update the widget. The Widget is called when the timeout set in widget.xml occurs.
*/
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {
super.onUpdate(context, appWidgetManager, appWidgetIds);
updateScreenFromDatabase(context, appWidgetManager, appWidgetIds);
}
/**
* This method fetches the data from the database and puts it in the 2 text elements on the screen
* @param context
* @param appWidgetManager
* @param appWidgetIds
*/
private static void updateScreenFromDatabase(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {
if(LAYOUTID == R.layout.widget_screen1){
RemoteViews views = new RemoteViews(context.getPackageName(), LAYOUTID);
for(int i = 0 ; i < appWidgetIds.length ; i++){
String currentLesson = "No current lesson";
String nextLesson = "No next lesson";
LessonHour[] hours = Database.getInstance(context).getCurrentAndNextLessonHour();
if(hours[0] != null){
currentLesson = hours[0].getStart().get(GregorianCalendar.HOUR_OF_DAY) + ":" + Utils.adjustMinutes(hours[0].getStart().get(GregorianCalendar.MINUTE)) + " " + hours[0] .getLesson().getSummary();
}
if(hours[1] != null){
nextLesson = hours[1].getStart().get(GregorianCalendar.HOUR_OF_DAY) + ":" + Utils.adjustMinutes(hours[1].getStart().get(GregorianCalendar.MINUTE)) + " " + hours[1] .getLesson().getSummary();
}
views.setTextViewText(R.id.txt_widget_lesson1, currentLesson);
views.setTextViewText(R.id.txt_widget_lesson2, nextLesson);
appWidgetManager.updateAppWidget(new ComponentName(context, Widget.class), views);
}
}
}
/**
* This method is called when the screen of the widget should change.
* The action tells the method to which screen it should change.
* @param context
* @param action: the screen the method should switch to. Either WIDGET_SCREEN1 or WIDGET_SCREEN2
*/
public static void buildUpdate(Context context, String action){
RemoteViews views;
if(action.equals(SWITCH_SCREEN1)){
views = new RemoteViews(context.getPackageName(), R.layout.widget_screen1);
AppWidgetManager.getInstance(context).updateAppWidget(new ComponentName(context, Widget.class), views);
LAYOUTID = R.layout.widget_screen1;
updateScreenFromDatabase(context, AppWidgetManager.getInstance(context), AppWidgetManager.getInstance(context).getAppWidgetIds(new ComponentName(context, Widget.class)));
}
else if(action.equals(SWITCH_SCREEN2)){
views = new RemoteViews(context.getPackageName(), R.layout.widget_screen2);
AppWidgetManager.getInstance(context).updateAppWidget(new ComponentName(context, Widget.class), views);
LAYOUTID = R.layout.widget_screen2;
}
setListeners(context);
}
/**
* This methods sets the onclick listeners for the elements displayed on the screen
* @param context
*/
private static void setListeners(Context context){
AppWidgetManager manager = AppWidgetManager.getInstance(context);
int[] appWidgetIds = manager.getAppWidgetIds(new ComponentName(context, Widget.class));
for (int i = 0 ; i < appWidgetIds.length; i++){
if(LAYOUTID == R.layout.widget_screen1){
Log.e("khlrooster", "setting listeners on widget screen 1");
RemoteViews views = new RemoteViews(context.getPackageName(), LAYOUTID);
Intent intent = new Intent(context, SwitchWidgetScreenService.class);
intent.setAction(SWITCH_SCREEN2);
intent.setData(Uri.parse("uri::" + Math.random()));
Log.e("khlrooster", "action of listener for screen 1: " + intent.getAction());
PendingIntent pi = PendingIntent.getService(context, 0, intent, Intent.FLAG_ACTIVITY_NEW_TASK);
views.setOnClickPendingIntent(R.id.imgbtn_switchDown, pi);
views.setOnClickPendingIntent(R.id.imgbtn_widget_notification, pi);
manager.updateAppWidget(new ComponentName(context, Widget.class), views);
Log.e("khlrooster", "listeners set on widget screen 1");
}
else if(LAYOUTID == R.layout.widget_screen2){
Log.e("khlrooster", "setting listeners on widget screen 2");
RemoteViews views = new RemoteViews(context.getPackageName(), LAYOUTID);
Intent intent2 = new Intent(context, SwitchWidgetScreenService.class);
intent2.setAction(SWITCH_SCREEN1);
PendingIntent pendingIntent = PendingIntent.getService(context, 0, intent2, 0);
views.setOnClickPendingIntent(R.id.imgbtn_switchUp, pendingIntent);
intent2 = new Intent(context, LessonDetail.class);
intent2.setAction(ADD_NOTE);
pendingIntent = PendingIntent.getActivity(context, 0, intent2, 0);
views.setOnClickPendingIntent(R.id.imgbtn_notes, pendingIntent);
intent2= new Intent(context, LessonDetail.class);
intent2.setAction(TAKE_PICTURE);
pendingIntent = PendingIntent.getActivity(context, 0, intent2, 0);
views.setOnClickPendingIntent(R.id.imgbtn_photo, pendingIntent);
manager.updateAppWidget(new ComponentName(context, Widget.class), views);
Log.e("khlrooster", "listeners set on widget screen 2");
}
}
}
}
，這裏是我的服務響應我的意圖：
public class SwitchWidgetScreenService extends Service {
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
super.onCreate();
Log.e("khlrooster", "Created the SwitchWidgetScreenService");
}
@Override
public void onStart(Intent intent, int startId) {
//super.onStart(intent, startId);
Log.e("khlrooster", "started the SwitchWidgetScreenService");
handleEvent(intent);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
handleEvent(intent);
Log.e("khlrooster", "started the SwitchWidgetScreenService");
return super.onStartCommand(intent, flags, startId);
}
private void handleEvent(Intent intent) {
Log.e("khlrooster", "it works, the screen changes to: " + intent.getAction());
if(intent.getAction().equals(Widget.SWITCH_SCREEN1)){
Widget.buildUpdate(this, Widget.SWITCH_SCREEN1);
}else if(intent.getAction().equals(Widget.SWITCH_SCREEN2)){
Widget.buildUpdate(this, Widget.SWITCH_SCREEN2);
}
}
}