Launcher源碼裏面找加載Widget的功能,有些繁瑣。簡化功能,把widget加到界面上的關鍵點如下:
1.請求appWidgetID
2.根據appWidgetID創建View
3.添加view
效果:
1.請求appWidgetID
/**
* 彈出widget選擇列表
*
* @param activity
*/
public void selectWidget(Activity activity) {
Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_PICK);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
mHost.allocateAppWidgetId());
activity.startActivityForResult(intent, REQUEST_ID);
}
2.根據appWidgetID創建View
//請求到的id如果保存下來,下次再加載的時候直接調用此函數則可完成添加widget
public View getAppWidgetView(int appWidgetId) {
AppWidgetProviderInfo appWidgetInfo = AppWidgetManager.getInstance(
mContext).getAppWidgetInfo(appWidgetId);
View hostView = mHost.createView(mContext, appWidgetId, appWidgetInfo);
Log.v(TAG, "completeAddAppWidget:" + appWidgetId);
hostView.setMinimumHeight(appWidgetInfo.minHeight);
hostView.setMinimumWidth(appWidgetInfo.minWidth);
return hostView;// 可以使用layout.addView(hostView, new
// LayoutParams(xx,xx))來設置widget的大小
}
public View getAppWidgetView(Intent data) {
Bundle extras = data.getExtras();
int appWidgetId = extras
.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, -1);
return getAppWidgetView(appWidgetId);
}
3.添加view
viewContainer.addView(getAppWidgetView(data));
總結:
關鍵是請求appwidgetid,然後保存下來,下次初始化APK的時候直接使用appwidgetid就行了,但是首次請求是必須的,如果appwidgetid與host_id對應不上則數據是不會更新的(測試的時候沒有數據,猜測是無法收到數據更新的廣播,需要再驗證)。
完成源代碼:http://download.csdn.net/detail/jiang4920/6745553