RemoteViews嵌入ListView复杂布局

2023-07-27 23:24:22

from http://blog.csdn.net/liliang497/article/details/8308313

主要函数

public void setRemoteAdapter (int appWidgetId, int viewId, Intent intent)

当在widgets中使用集合（比如说ListView, StackView等等），在单独的一个条目中设置PendingIntents是非常浪费的，并且是不被允许的。然而一个单独的PendingIntents模板可以设置在集合里，参见setPendingIntentTemplate(int, PendingIntent)，并且一个给定条目的单独的on-click的动作可以通过在条目上设置fillInIntent来区别。然后这个fillInIntent就和PendingIntent的实例结合在一起决定最终的被点击执行的intent。规定如下：在PendingIntent实例里，左边为空白的任何区域，但由fillInIntent提供的，将被重写，同时PendingIntent的结果将被使用。然后PendingIntent将被在fillInIntent中设置的有联系的字段填充。

public void setOnClickFillInIntent (int viewId, Intent fillInIntent)

当在widgets中使用集合(比如说ListView, StackView等等)时，在单独的一个条目中设置PendingIntent代价是很昂贵的，因此也是不被允许的。这个方法应该在集合中设置一个单独的PendingIntent模板,然后每一个单独的条目都可以通过setOnClickFillInIntent(int, Intent)来区别他们的点击事件。

public void setPendingIntentTemplate (int viewId, PendingIntent pendingIntentTemplate)

1.布局文件

在Mantifest中：

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.test.appwidget"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="15" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <receiver android:name=".CustomWidget">

            <intent-filter >

                <action android:name="android.appwidget.action.APPWIDGET_UPDATE"></action>

            </intent-filter>

            <meta-data

                android:name="android.appwidget.provider"

                android:resource="@xml/custom_widget">

            </meta-data>

        </receiver>

           <service

            android:name=".UpdateService"

            android:permission="android.permission.BIND_REMOTEVIEWS"

            android:exported="false" >

        </service>

    </application>

</manifest>

在res/xml/下建立custom_widget.xml文件

<?xml version="1.0" encoding="UTF-8"?>

<appwidget-provider

    xmlns:android = "http://schemas.android.com/apk/res/android"

    android:minWidth="280dp"

    android:minHeight="280dp"

    android:initialLayout="@layout/widget_layout"

    android:updatePeriodMillis="0">

    <!-- sdk1.5之后updatePeriodMillis已失效，置为0，循环执行自行在代码中实现 -->

</appwidget-provider>

在res/layout/下建立widget_layout和widget_list_item布局文件

widget_layout.xml

<?xml version="1.0" encoding="UTF-8"?>

<FrameLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="#000000">

    <ListView

        android:id="@+id/widget_list"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:scrollbars="none"

        android:divider="@drawable/widget_list_divider"

        android:listSelector="@drawable/list_bg_selector"

        android:layout_marginTop="4dp"

        android:layout_marginBottom="4dp"

        android:layout_marginLeft = "5dp"

        android:cacheColorHint="#00000000"/> 

</FrameLayout>

widget_list_item布局文件：

<?xml version="1.0" encoding="UTF-8"?>

<LinearLayout

    xmlns:android = "http://schemas.android.com/apk/res/android"

    android:id = "@+id/widget_list_item_layout"

    android:layout_width = "fill_parent"

    android:layout_height = "fill_parent"

    android:background="#00000000"

    android:orientation="vertical">

      <TextView

        android:id = "@+id/widget_list_item_tv"

        android:layout_width = "fill_parent"

        android:layout_height = "wrap_content"

        android:layout_marginTop = "10dip"

        android:layout_marginRight="10dip"

        android:layout_marginLeft = "20dp"

        android:lineSpacingExtra = "4dip"

        android:textSize="20sp"

           android:textColor="#FFFFF0"/>

</LinearLayout>

CustomWidget.java

package com.test.appwidget;

import java.util.ArrayList;

import java.util.List;

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.widget.RemoteViews;

public class CustomWidget extends AppWidgetProvider{

    private static List<String> sList;

    static{

        sList = new ArrayList<String>();

        sList.add("第一条新闻");

        sList.add("第二条新闻");

        sList.add("第三条新闻");

        sList.add("第四条新闻");

        sList.add("第五条新闻");

        sList.add("第六条新闻");

    }

    private ComponentName thisWidget;

    private RemoteViews remoteViews;

    @Override

    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds){

        thisWidget = new ComponentName(context, CustomWidget.class);

        remoteViews = new RemoteViews(context.getPackageName(),    R.layout.widget_layout);

        Intent intent = new Intent(context, UpdateService.class);

        intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetIds[0]);

        //设置适配器

        remoteViews.setRemoteAdapter(R.id.widget_list, intent);

        Intent intent2 = new Intent();

        //TODO

        //intent2.setComponent(new ComponentName("包名", "类名"));

        PendingIntent pendingIntentTemplate = PendingIntent.getActivity(context, 1, intent2, PendingIntent.FLAG_UPDATE_CURRENT);

        //拼接PendingIntent

        remoteViews.setPendingIntentTemplate(R.id.widget_list, pendingIntentTemplate);

        //更新RemoteViews

        appWidgetManager.updateAppWidget(thisWidget, remoteViews);

        AppWidgetManager manager = AppWidgetManager.getInstance(context);

        manager.notifyAppWidgetViewDataChanged(appWidgetIds[0], R.id.widget_list);

    }

    @Override

    public void onDisabled(Context context) {

        super.onDisabled(context);

    }

    public static List<String> getList(){

        return sList;

    }

}

UpdateService.java

package com.test.appwidget;

import java.util.List;

import android.content.Context;

import android.content.Intent;

import android.os.IBinder;

import android.os.Looper;

import android.widget.RemoteViews;

import android.widget.RemoteViewsService;

public class UpdateService extends RemoteViewsService {

    @Override

    public void onStart(Intent intent, int startId){

        super.onCreate();

    }

    @Override

    public IBinder onBind(Intent intent) {

        return super.onBind(intent);

    }

    @Override

    public RemoteViewsFactory onGetViewFactory(Intent intent) {

        return new ListRemoteViewsFactory(this.getApplicationContext(), intent);

    }

    class ListRemoteViewsFactory implements RemoteViewsService.RemoteViewsFactory{

        private final Context mContext;

        private final List<String> mList;

        public ListRemoteViewsFactory(Context context, Intent intent){

            mContext = context;

            mList = CustomWidget.getList();

            if(Looper.myLooper() == null){

                Looper.prepare();

            }

        }

        @Override

        public void onCreate() {

        }

        @Override

        public void onDataSetChanged() {

        }

        @Override

        public void onDestroy() {

            mList.clear();

        }

        @Override

        public int getCount() {

            return mList.size();

        }

        @Override

        public RemoteViews getViewAt(int position) {

            if(position<0 || position>=mList.size())

                return null;

            String content = mList.get(position);

            final RemoteViews rv = new RemoteViews(mContext.getPackageName(), R.layout.widget_list_item);

            Intent intent = new Intent();

            //TODO

            //intent.setComponent(new ComponentName("包名", "类名"));

            //与CustomWidget中remoteViews.setPendingIntentTemplate配对使用

            rv.setOnClickFillInIntent(R.id.widget_list_item_layout, intent);

            rv.setTextViewText(R.id.widget_list_item_tv, content);

            return rv;

        }

        @Override

        public RemoteViews getLoadingView() {

            return null;

        }

        @Override

        public int getViewTypeCount() {

            return 1;

        }

        @Override

        public long getItemId(int position) {

            return position;

        }

        @Override

        public boolean hasStableIds() {

            return true;

        }

    }

}

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