系统通知栏显示进度条Android插件

app新版更新时，在系统通知栏显示下载进度条，代码还有地方要改进。
使用：

        var url = "";  
    var options = {method:"GET"};  
    dtask = plus.downloader.createDownload( url, options );  
    plus.notification.setNotification("新版下载", "开始下载");//插件调用  
    dtask.addEventListener( "statechanged", function(task,status){  
        switch(task.state) {  
            case 1: // 开始  
                break;  
            case 2: //已连接到服务器  
                 break;  
            case 3: // 已接收到数据  
                var current = parseInt(100*task.downloadedSize/task.totalSize);  
                plus.notification.setProgress(current);//插件调用  
                 break;  
            case 4: // 下载完成           
                plus.notification.compProgressNotification("下载完成");//插件调用  
                plus.runtime.install(plus.io.convertLocalFileSystemURL(task.filename),//安装APP  
                               {force:true},function(){  

                },function(){  
                    mui.toast('安装失败');  
                });  
                break;  
        }  
    } );

添加权限：

"notification":{  
            "description": "通知栏"  
        }

plugin.js：

document.addEventListener("plusready",  function()  
{  
    var B = window.plus.bridge;  
    var notification =   
    {  
        "setProgress":function(incr){  
            return B.exec("notification", "setProgress", [incr]);  
        },  
        "setNotification":function(contentTitle, ticker){  
            return B.exec("notification", "setProgressNotification", [contentTitle, ticker]);  
        },  
        "compProgressNotification":function(contentTitle){  
            return B.exec("notification", "compProgressNotification", [contentTitle]);  
        }  
    };  
    window.plus.notification = notification;  
}, true);

Notify.java：

import io.dcloud.DHInterface.AbsMgr;  
import io.dcloud.DHInterface.IFeature;  
import io.dcloud.DHInterface.IWebview;  
import io.dcloud.util.JSUtil;  
import io.dcloud.adapter.util.AndroidResources;  
import android.R.integer;  
import android.R.string;  
import android.app.Activity;  
import android.app.Notification;  
import android.app.NotificationManager;  
import android.content.Context;  
import android.os.Bundle;  
import android.util.Log;  

public class Notify implements IFeature{  

    //IWebview webview;  
    //Context context;  
    NotificationManager manager;  
    Notification.Builder builder;  
    Activity activity;  

    @Override  
    public String execute(final IWebview pWebview, final String action, final String[] pArgs) {  
        activity = pWebview.getActivity();  
        manager = (NotificationManager)activity.getSystemService(Activity.NOTIFICATION_SERVICE);  
        builder = new Notification.Builder(activity);  
        builder.setWhen(System.currentTimeMillis())  
            .setPriority(Notification.PRIORITY_DEFAULT)  
            .setContentTitle("新版下载")  
            .setTicker("开始下载")  
            .setSmallIcon(R.drawable.icon)  
            .setVibrate(null);  

        activity.runOnUiThread(new Runnable() {  
            @Override  
            public void run() {  
                if("setNotification".equals(action))  
                {  
                    String title = pArgs[0];  
                    String ticker = pArgs[1];  
                    builder.setContentTitle(title).setTicker(ticker);  
                    manager.notify(1000, builder.build());  
                }  
                else if("setProgress".equals(action))  
                {  

                    int incr = Integer.parseInt(pArgs[0]);  
                    builder.setProgress(100, incr, false);  
                    manager.notify(1000, builder.build());  
                }  
                else if("compProgressNotification".equals(action))  
                {  
                    String title = pArgs[0];  
                    builder.setContentTitle(title).setProgress(0, 0, false);  
                    manager.notify(1000, builder.build());  
                }  
            }  
        });  
        return null;  
    }  

    @Override  
    public void init(AbsMgr arg0, String arg1) {  

    }  
    @Override  
    public void dispose(String arg0) {  
    }  
}