官方有话这样说:
A RemoteViews object (and, consequently, an App Widget) can support the following layout classes:
And the following widget classes:
AnalogClock
Button
Chronometer
ImageButton
ImageView
ProgressBar
TextView
ViewFlipper
ListView
GridView
StackView
AdapterViewFlipper
Descendants of these classes are not supported.不支持这些类的后代
接下来的示例说明怎么样实现 使用ListView、GridView、StackView、ViewFlipper创建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" > <!-- 计算size的公式: (70*n) -30 n为部件所需的大小(占几格) 当前的就是 4x4 minResizeWidth minResizeHeight 能被调整的最小宽高,若大于minWidth minHeight 则忽略 label 选择部件时看到标签 icon 选择部件时看到图标 updatePeriodMillis 更新时间间隔 previewImage 选择部件时 展示的图像 3.0以上使用 initialLayout 布局文件 resizeMode 调整size模式 configure 如果需要在启动前先启动一个Activity进行设置,在这里给出Activity的完整类名 autoAdvanceViewId=@id/xx 与集合部件一起使用,指定该集合item自动推进 暂只发现对stackview有效,会自动一段时间推进到下一个 集合部件:3.0后才有。set view:ListView、GridView、StackView、AdapterViewFlipper ViewFlipper 为非集合部件 --> </appwidget-provider>
widget使用的布局文件 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>
集合的数据源 需要 继承 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; /** * 继承自RemoteViewsService 必须重写onGetViewFactory * 该服务只是用来 创建 集合widget使用的数据源 * @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 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); } @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); * 使用该通知更新数据源,会调用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:将fillInIntent发送, * fillInIntent它默认的就有action 是provider中使用 setPendingIntentTemplate 设置的action */ views.setOnClickFillInIntent(android.R.id.text1, fillInIntent); return views; } @Override public RemoteViews getLoadingView() { /* 在更新界面的时候如果耗时就会显示 正在加载... 的默认字样,但是你可以更改这个界面 * 如果返回null 显示默认界面 * 否则 加载自定义的,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; } } }
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 设置adapter,处理item点击 * ViewFlipper 在RemoteViews中缺少支持,暂只能在它的布局文件中设置 轮换效果 * 对于切换到哪一个子view的item事件不好处理,只能设置一个整体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("--点击了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处理异进程中的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 继承自AbsListView or AdapterViewAnimator 的view Intent intent = new Intent(context, WidgetSetService.class); views.setRemoteAdapter(visible, intent);//设置集合的adapter为intent指定的service views.setEmptyView(visible, R.id.tv_empty);//指定集合view为空时显示的view Intent toIntent = new Intent(CLICK_ITEM_ACTION); PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 200, toIntent, PendingIntent.FLAG_UPDATE_CURRENT); /* * setPendingIntentTemplate 设置pendingIntent 模板 * setOnClickFillInIntent 可以将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 实例 } } }
运行的周期函数
点击stackview的效果图
Android Widget 小部件(四---完结) 使用ListView、GridView、StackView、ViewFlipper展示Widget,布布扣,bubuko.com
Android Widget 小部件(四---完结) 使用ListView、GridView、StackView、ViewFlipper展示Widget