android中如何在窗口小插件（widget），中使用自定义进度条

linsongming 2015-11-11 10:08:49

各位大大，最近在开发一个任务管理器，widget部分要做一个进度条显示当前内存使用情况，点击能清理内存，app运行后往桌面添加widget提示小插件加载故障，我的widgetProvider类如下：



package com.example.android_dev.taskkiller.activity;



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.content.pm.PackageManager;

import android.content.pm.ResolveInfo;

import android.net.Uri;



import android.util.Log;



import android.widget.RemoteViews;

import android.widget.Toast;



import com.example.android_dev.taskkiller.R;



import com.example.android_dev.taskkiller.Service.MyWidgetService;

import com.example.android_dev.taskkiller.biz.Process_biz;

import com.lidroid.xutils.ViewUtils;

import com.lidroid.xutils.view.annotation.ViewInject;



import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Set;





/**

 * Created by Android-DEV on 2015/10/22.

 */

public class MyWidgetProvider extends AppWidgetProvider{

    private  int progress ;

    String availMemStr;

    String info;



    private static final String TAG = "MyWidgetProvider";



    /**  启动AppWidgetService服务对应的action  */

    private final Intent my_widget_service_intent=new Intent("android.action.MY_WIDGET_SERVICE");





    /** 更新 widget 的广播对应的action */

    private final String ACTION_WIDGET_RECEIVE="com.example.task_killer.widget.click";





    /** 保存 widget 的id的HashSet，每新建一个 widget 都会为该 widget 分配一个 id*/

    private static Set idsSet = new HashSet();



    /** 图片信息 */

    private static final int Layout_Show = 1;



    /** 内存使用情况 */

   private static double totality;   //总内存

   private static double available;   //可用内存



/*    @ViewInject(R.id.widget_progress_bar)

    private ArcProgressBar  arcProgressBar;*/



    private boolean DEBUG = false;







    @Override

    public void onDeleted(Context context, int[] appWidgetIds) {



        super.onDeleted(context, appWidgetIds);

        /** 当 widget 被删除时，对应的删除set中保存的widget的id */

        for (int appWidgetId : appWidgetIds) {

            idsSet.remove(Integer.valueOf(appWidgetId));

        }

        prtSet();



    }



    @Override

    public void onEnabled(Context context) {

        super.onEnabled(context);



        Intent eintent = new Intent(createExplicitFromImplicitIntent(context,my_widget_service_intent));

        context.startService(eintent);



        Log.i("TAG", "onEnabled");

        /** 当前内存使用情况 */

        Process_biz biz = Process_biz.getInstance(context);

        String am = biz.getSystemAvaialbeMemorySize();

        String bm = biz.getTotalMemory();

        totality =  Double.valueOf(bm);

        available = Double.valueOf(am);











    }



    @Override

    public void onDisabled(Context context) {

        super.onDisabled(context);



        Log.i("TAG", "onDisabled");

        Intent eintent = new Intent(createExplicitFromImplicitIntent(context,my_widget_service_intent));

        context.stopService(eintent);

    }



    public static Intent createExplicitFromImplicitIntent(Context context, Intent implicitIntent) {

        // Retrieve all services that can match the given intent

        PackageManager pm = context.getPackageManager();

        List<ResolveInfo> resolveInfo = pm.queryIntentServices(implicitIntent, 0);



        // Make sure only one match was found

        if (resolveInfo == null || resolveInfo.size() != 1) {

            return null;

        }



        // Get component info and create ComponentName

        ResolveInfo serviceInfo = resolveInfo.get(0);

        String packageName = serviceInfo.serviceInfo.packageName;

        String className = serviceInfo.serviceInfo.name;

        ComponentName component = new ComponentName(packageName, className);



        // Create a new intent. Use the old one for extras and such reuse

        Intent explicitIntent = new Intent(implicitIntent);



        // Set the component to be explicit

        explicitIntent.setComponent(component);



        return explicitIntent;

    }



    @Override

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

        super.onUpdate(context, appWidgetManager, appWidgetIds);

        Log.i("TAG", "onUpdate");



        /** 每次 widget 被创建时，对应的将widget的id添加到set中  */

        for(int appWidgetId:appWidgetIds){

            idsSet.add(Integer.valueOf(appWidgetId));

        }

        prtSet();







    }





    @Override

    public void onReceive(Context context, Intent intent) {

        super.onReceive(context, intent);

        Log.i("TAG","intent = " + intent);

        if(intent.getAction().equals("com.example.task_killer.widget.click")){

            Log.i("TAG", "onReceive");



            updatepWidgets(context, AppWidgetManager.getInstance(context), idsSet);

        }





    }





    private void updatepWidgets(Context context, AppWidgetManager appWidgetManager, Set set){



        /** widget 的id */

        int appID;

        /** 迭代器，用于遍历所有保存的widget的id */

        Iterator it = set.iterator();



        while(it.hasNext()){

            appID = ((Integer)it.next()).intValue();



            /** 获取对应的布局 */

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

            int a =(int) ((totality-available)/totality*100);

            String b = String.valueOf(a);

            remoteViews.setTextViewText(R.id.widget_tv,b+"%");

           // remoteViews.setProgressBar(R.id.widget_progress_bar,(int)totality,(int)(totality-available),true);

            /*double b = /totality;

            arcProgressBar.addProgress(236);*/

            /** 设置点击按钮对应的PendingIntent：即点击按钮时，发送广播。 */

            remoteViews.setOnClickPendingIntent(R.id.widget_layout, getPendingIntent(context, Layout_Show));



            /** 更新widget */

            appWidgetManager.updateAppWidget(appID,remoteViews);

        }



    }



    private PendingIntent getPendingIntent(Context context, int layout_Id) {

        Intent intent = new Intent();

        intent.setClass(context,MyWidgetProvider.class);

        intent.addCategory(Intent.CATEGORY_ALTERNATIVE);

        intent.setData(Uri.parse("custom:" + layout_Id));

        PendingIntent pi = PendingIntent.getBroadcast(context, 0, intent, 0 );

        return pi;



    }



    /** 调试用：遍历set */

    private void prtSet() {

        if (DEBUG) {

            int index = 0;

            int size = idsSet.size();

            Iterator it = idsSet.iterator();

            Log.d(TAG, "total:"+size);

            while (it.hasNext()) {

                Log.d(TAG, index + " -- " + ((Integer)it.next()).intValue());

            }

        }

    }





}