編輯:關於Android編程
官方有話這樣說:
A RemoteViews object (and, consequently, an App Widget) can support the following layout classes:
FrameLayout
LinearLayout
RelativeLayout
And the following widget classes:
AnalogClock
Button
Chronometer
ImageButton
ImageView
ProgressBar
TextView
ViewFlipper
ListView
GridView
StackView
AdapterViewFlipper
Descendants of these classes are not supported.不支持這些類的後代
接下來的示例說明怎麼樣實現 使用ListView、GridView、StackView、ViewFlipper創建AppWidget
menifest
widget使用的布局文件 collections_view_widget.xml
<frameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#80000000" > /> </frameLayout>
package com.stone.service; import java.util.ArrayList; import java.util.List; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.widget.RemoteViews; import android.widget.RemoteViewsService; import com.stone.R; import com.stone.receiver.WidgetSetProvider; /** * 繼承自RemoteViewsService 必須重寫onGetViewFactory * 該服務只是用來 創建 集合widget使用的數據源 * @author stone */ public class WidgetSetService extends RemoteViewsService { public WidgetSetService() { } @Override public RemoteViewsFactory onGetViewFactory(Intent intent) { return new WidgetFactory(this.getApplicationContext(), intent); } public class WidgetFactory implements RemoteViewsService.RemoteViewsFactory { private static final int mCount = 10; private Context mContext; private ListmWidgetItems = new ArrayList (); public WidgetFactory(Context context, Intent intent) { mContext = context; // mAppWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, // AppWidgetManager.INVALID_APPWIDGET_ID); } @Override public void onCreate() { for (int i = 0; i < mCount; i++) { mWidgetItems.add("item:" + i + "!"); } } @Override public void onDataSetChanged() { /* * appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds, R.id.listview); * 使用該通知更新數據源,會調用onDataSetChanged */ System.out.println("----onDataSetChanged----"); } @Override public void onDestroy() { mWidgetItems.clear(); } @Override public int getCount() { return mCount; } @Override public RemoteViews getViewAt(int position) { RemoteViews views = new RemoteViews(mContext.getPackageName(), android.R.layout.simple_list_item_1); views.setTextViewText(android.R.id.text1, "item:" + position); System.out.println("RemoteViewsService----getViewAt" + position); Bundle extras = new Bundle(); extras.putInt(WidgetSetProvider.EXTRA_ITEM, position); Intent fillInIntent = new Intent(); fillInIntent.putExtras(extras); /* * android.R.layout.simple_list_item_1 --- id --- text1 * listview的item click:將fillInIntent發送, * fillInIntent它默認的就有action 是provider中使用 setPendingIntentTemplate 設置的action */ views.setOnClickFillInIntent(android.R.id.text1, fillInIntent); return views; } @Override public RemoteViews getLoadingView() { /* 在更新界面的時候如果耗時就會顯示 正在加載... 的默認字樣,但是你可以更改這個界面 * 如果返回null 顯示默認界面 * 否則 加載自定義的,返回RemoteViews */ return null; } @Override public int getViewTypeCount() { return 1; } @Override public long getItemId(int position) { return position; } @Override public boolean hasStableIds() { return false; } } }
package com.stone.receiver; import com.stone.R; import com.stone.service.WidgetSetService; import android.app.PendingIntent; import android.appwidget.AppWidgetManager; import android.appwidget.AppWidgetProvider; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.text.TextUtils; import android.text.format.DateUtils; import android.view.View; import android.widget.RemoteViews; import android.widget.Toast; import android.widget.ViewFlipper; /** * 使用了集合展示AppWidget * ListView、GridView、StackView 設置adapter,處理item點擊 * ViewFlipper 在RemoteViews中缺少支持,暫只能在它的布局文件中設置 輪換效果 * 對於切換到哪一個子view的item事件不好處理,只能設置一個整體setPendingIntent * @author stone */ public class WidgetSetProvider extends AppWidgetProvider { public final static String CLICK_ACTION = "com.stone.action.clickset"; public final static String CLICK_ITEM_ACTION = "com.stone.action.clickset.item"; public final static String EXTRA_ITEM = "extra_item"; @Override public void onReceive(Context context, Intent intent) { super.onReceive(context, intent); System.out.println(intent.getAction()); if (TextUtils.equals(CLICK_ACTION, intent.getAction())) { int extraType = intent.getIntExtra("view_tag", 0); if (extraType > 0) { System.out.println("extra:::" + extraType); switch (extraType) { case 1: updateWidget(context, R.id.listview, R.id.gridview, R.id.stackview, R.id.viewflipper); break; case 2: updateWidget(context, R.id.gridview, R.id.listview, R.id.stackview, R.id.viewflipper); break; case 3: updateWidget(context, R.id.stackview, R.id.gridview, R.id.listview, R.id.viewflipper); break; case 4: updateWidget(context, R.id.viewflipper, R.id.gridview, R.id.stackview, R.id.listview); break; default: break; } } } else if (TextUtils.equals(CLICK_ITEM_ACTION, intent.getAction())) { Bundle extras = intent.getExtras(); int position = extras.getInt(WidgetSetProvider.EXTRA_ITEM, -1); if (position != -1) { System.out.println("--點擊了item---" + position); System.out.println(""); // Toast.makeText(context, "click item:" + position, 0).show(); } } } @Override public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.collections_view_widget); Intent intent1 = new Intent(CLICK_ACTION); intent1.putExtra("view_tag", 1); PendingIntent pendingIntent1 = PendingIntent.getBroadcast(context, 101, intent1, 0); views.setOnClickPendingIntent(R.id.btn_listview, pendingIntent1); Intent intent2 = new Intent(CLICK_ACTION); intent2.putExtra("view_tag", 2); PendingIntent pendingIntent2 = PendingIntent.getBroadcast(context, 102, intent2, 0); views.setOnClickPendingIntent(R.id.btn_gridview, pendingIntent2); Intent intent3 = new Intent(CLICK_ACTION); intent3.putExtra("view_tag", 3); PendingIntent pendingIntent3 = PendingIntent.getBroadcast(context, 103, intent3, 0); views.setOnClickPendingIntent(R.id.btn_stackview, pendingIntent3); Intent intent4 = new Intent(CLICK_ACTION); intent4.putExtra("view_tag", 4); PendingIntent pendingIntent4 = PendingIntent.getBroadcast(context, 104, intent4, 0); views.setOnClickPendingIntent(R.id.btn_viewflipper, pendingIntent4); appWidgetManager.updateAppWidget(appWidgetIds, views); System.out.println("setwidget update"); super.onUpdate(context, appWidgetManager, appWidgetIds); } @Override public void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager, int appWidgetId, Bundle newOptions) { super.onAppWidgetOptionsChanged(context, appWidgetManager, appWidgetId, newOptions); } @Override public void onDeleted(Context context, int[] appWidgetIds) { super.onDeleted(context, appWidgetIds); } @Override public void onEnabled(Context context) { super.onEnabled(context); } @Override public void onDisabled(Context context) { super.onDisabled(context); } private void updateWidget(Context context, int visible, int gone1, int gone2, int gone3) { //RemoteViews處理異進程中的View RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.collections_view_widget); views.setViewVisibility(visible, View.VISIBLE); views.setViewVisibility(gone1, View.GONE); views.setViewVisibility(gone2, View.GONE); views.setViewVisibility(gone3, View.GONE); if (visible != R.id.viewflipper) {//viewflipper 不是 繼承自AbsListView or AdapterViewAnimator 的view Intent intent = new Intent(context, WidgetSetService.class); views.setRemoteAdapter(visible, intent);//設置集合的adapter為intent指定的service views.setEmptyView(visible, R.id.tv_empty);//指定集合view為空時顯示的view Intent toIntent = new Intent(CLICK_ITEM_ACTION); PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 200, toIntent, PendingIntent.FLAG_UPDATE_CURRENT); /* * setPendingIntentTemplate 設置pendingIntent 模板 * setOnClickFillInIntent 可以將fillInIntent 添加到pendingIntent中 */ views.setPendingIntentTemplate(visible, pendingIntent); } else if (visible == R.id.viewflipper) { // views.setPendingIntentTemplate(R.id.viewflipper, pendingIntentTemplate); } AppWidgetManager am = AppWidgetManager.getInstance(context); int[] appWidgetIds = am.getAppWidgetIds(new ComponentName(context, WidgetSetProvider.class)); for (int i = 0; i < appWidgetIds.length; i++) { am.updateAppWidget(appWidgetIds[i], views); //更新 實例 } } }
運行的周期函數
點擊stackview的效果圖
一、 Service簡介Service是android 系統中的四大組件之一(Activity、Service、BroadcastReceiver、ContentProv
https://github.com/hongyangAndroid/MagicViewPager實現效果:Rotate Y Rotate Dow
在上一篇博文《Android之——殺死用戶選中的進程優化》一文中,我向大家介紹了如何優化用戶的體驗,那麼這篇博文中,我將向大家介紹如何進行系統進程
1.ShapDrawable用途:圓角的輸入框 單色背景的按鈕開發步驟:1. 創建drawable文件夾2. 創建一個shap文件. 文件名:業務名_控件名縮寫_bg