Android Widget 小組件(四---完結) 使用ListView、GridView、StackView、ViewFlipper展示Widget

標籤：android widget

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.不支援這些類的後代

接下來的樣本說明怎麼樣實現 使用ListView、GridView、StackView、ViewFlipper建立AppWidget

menifest

<receiver android:name="com.stone.receiver.WidgetSetProvider">             <intent-filter>                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>                 <action android:name="com.stone.action.clickset"/>                 <action android:name="com.stone.action.clickset.item"/>             </intent-filter>             <meta-data android:name="android.appwidget.provider"                 android:resource="@xml/set_widget_provider"/></receiver>

set_widget_provider.xml

<?xml version="1.0" encoding="utf-8"?><appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"    android:minWidth="250dp"    android:minHeight="180dp"    android:updatePeriodMillis="5000"    android:previewImage="@drawable/ic_launcher"    android:initialLayout="@layout/collections_view_widget"    android:resizeMode="horizontal|vertical"    android:autoAdvanceViewId="@id/viewflipper"  ><!-- 計算size的公式: (70*n) -30  n為組件所需的大小(占幾格)   當前的就是  4x4minResizeWidth    minResizeHeight   能被調整的最小寬高，若大於minWidth minHeight 則忽略    label選擇組件時看到標籤    icon選擇組件時看到表徵圖    updatePeriodMillis更新時間間隔    previewImage選擇組件時 展示的映像  3.0以上使用    initialLayout布局檔案    resizeMode調整size模式    configure如果需要在啟動前先啟動一個Activity進行設定，在這裡給出Activity的完整類名    [email protected]/xx與集合組件一起使用，指定該集合item自動推進 暫只發現對stackview有效，會自動一段時間推進到下一個        集合組件：3.0後才有。set view：ListView、GridView、StackView、AdapterViewFlipper    ViewFlipper 為非集合組件 --></appwidget-provider>

widget使用的布局檔案 collections_view_widget.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <LinearLayout        android:layout_width="fill_parent"        android:layout_height="wrap_content" >        <Button            android:id="@+id/btn_listview"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="listview" />        <Button            android:id="@+id/btn_gridview"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="gridview" />        <Button            android:id="@+id/btn_stackview"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="stackview" />        <Button            android:id="@+id/btn_viewflipper"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="viewflipper" />    </LinearLayout>    <FrameLayout        xmlns:android="http://schemas.android.com/apk/res/android"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="#80000000" >        />        <ListView            android:id="@+id/listview"            android:layout_width="fill_parent"            android:layout_height="fill_parent" />        <GridView            android:id="@+id/gridview"            android:layout_width="fill_parent"            android:layout_height="fill_parent"            android:numColumns="2"            android:visibility="gone" />        <StackView            android:id="@+id/stackview"            android:layout_width="fill_parent"            android:layout_height="fill_parent"            android:visibility="gone" />        <ViewFlipper            android:id="@+id/viewflipper"            android:layout_width="fill_parent"            android:layout_height="fill_parent"            android:autoStart="true"            android:flipInterval="2000"            android:visibility="gone" ><!-- autoStart=true  <==>startFlipping()startFlipping() <==> How long to wait before flipping to the next view -->            <ImageView                android:id="@+id/iv1"                android:layout_width="fill_parent"                android:layout_height="fill_parent"                android:background="@drawable/a11"/>            <ImageView                android:id="@+id/iv2"                android:layout_width="fill_parent"                android:layout_height="fill_parent"                android:background="@drawable/a2"/>            <ImageView                android:id="@+id/iv3"                android:layout_width="fill_parent"                android:layout_height="fill_parent"                android:background="@drawable/a3" />            <ImageView                android:id="@+id/iv4"                android:layout_width="fill_parent"                android:layout_height="fill_parent"                android:background="@drawable/a4" />        </ViewFlipper>        <TextView            android:id="@+id/tv_empty"            android:layout_width="fill_parent"            android:layout_height="fill_parent"            android:gravity="center"            android:text="Empty List"            android:visibility="gone" />    </FrameLayout></LinearLayout>

集合的資料來源 需要 繼承 RemoteViewsService

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 建立 集合widget使用的資料來源 * @author stone */public class WidgetSetService extends RemoteViewsService {public WidgetSetService() {}@Overridepublic 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 List<String> mWidgetItems = new ArrayList<String>();public WidgetFactory(Context context, Intent intent) {        mContext = context;//        mAppWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,//                AppWidgetManager.INVALID_APPWIDGET_ID);    }@Overridepublic void onCreate() {for (int i = 0; i < mCount; i++) {                mWidgetItems.add("item:" + i + "!");            }}@Overridepublic void onDataSetChanged() {/* * appWidgetManager.notifyAppWidgetViewDataChanged(appWidgetIds, R.id.listview); * 使用該通知更新資料來源，會調用onDataSetChanged */System.out.println("----onDataSetChanged----");}@Overridepublic void onDestroy() {mWidgetItems.clear();}@Overridepublic int getCount() {return  mCount;}@Overridepublic 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它預設的就有action 是provider中使用 setPendingIntentTemplate 設定的action             */views.setOnClickFillInIntent(android.R.id.text1, fillInIntent);return views;}@Overridepublic RemoteViews getLoadingView() {/* 在更新介面的時候如果耗時就會顯示 正在載入... 的預設字樣，但是你可以更改這個介面 * 如果返回null 顯示預設介面 * 否則 載入自訂的，返回RemoteViews */return null;}@Overridepublic int getViewTypeCount() {return 1;}@Overridepublic long getItemId(int position) {return position;}@Overridepublic boolean hasStableIds() {return false;}}}

widgetprovider

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 設定adapter，處理item點擊 * ViewFlipper 在RemoteViews中缺少支援，暫只能在它的布局檔案中設定 輪換效果 * 對於切換到哪一個子view的item事件不好處理，只能設定一個整體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";@Overridepublic 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();}}}@Overridepublic 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);}@Overridepublic void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager, int appWidgetId,Bundle newOptions) {super.onAppWidgetOptionsChanged(context, appWidgetManager, appWidgetId,newOptions);}@Overridepublic void onDeleted(Context context, int[] appWidgetIds) {super.onDeleted(context, appWidgetIds);}@Overridepublic void onEnabled(Context context) {super.onEnabled(context);}@Overridepublic 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ViewRemoteViews 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viewIntent intent = new Intent(context, WidgetSetService.class);views.setRemoteAdapter(visible, intent);//設定集合的adapter為intent指定的serviceviews.setEmptyView(visible, R.id.tv_empty);//指定集合view為空白時顯示的viewIntent toIntent = new Intent(CLICK_ITEM_ACTION);PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 200, toIntent, PendingIntent.FLAG_UPDATE_CURRENT);/* * setPendingIntentTemplate 設定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 執行個體}}}

啟動並執行周期函數

點擊stackview的