【Android随记】-- AppWidget更新桌面内容

今天遇到了一个问题  

  Android的appwidget中 有若干个按钮 点击不同的按钮  在appwidget上更新不同的文字，

一开始以为很简单，实际上也挺简单的 ,只能说自己技术不行  

 

就是在发送广播  绑定事件的时候 

public static PendingIntent getBroadcast(Context context, int requestCode,Intent intent, int flags)

第二个参数要设置成不同  否则有可能接收广播时  取出的数据为null

 ----------------------------------------------------------------------

 以下为我的Demo代码，仅供参考

package com.example.demo;

import android.app.PendingIntent;
import android.app.PendingIntent.CanceledException;
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.widget.RemoteViews;

public class AppWidget extends AppWidgetProvider {
    /**
     * 接受广播事件
     * */

    @Override
    public void onReceive(Context context, Intent intent) {

        if (intent.getAction().equals("gejw.android.widget1")) {
            RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
                    R.layout.appwidgetlayout);
            remoteViews.setTextViewText(R.id.tx, intent.getStringExtra("msg"));

            AppWidgetManager appWidgetManager = AppWidgetManager
                    .getInstance(context);

            ComponentName componentName = new ComponentName(context,
                    AppWidget.class);

            appWidgetManager.updateAppWidget(componentName, remoteViews);
        }
        super.onReceive(context, intent);
    }

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,
            int[] appWidgetIds) {
        RemoteViews remoteViews = new RemoteViews(context.getPackageName(),
                R.layout.appwidgetlayout);

        click(context, remoteViews, R.id.btn1, "按钮1");
        click(context, remoteViews, R.id.btn2, "按钮2");
        click(context, remoteViews, R.id.btn3, "按钮3");
        click(context, remoteViews, R.id.btn4, "按钮4");
        click(context, remoteViews, R.id.btn5, "按钮5");

        appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);
    }

    public void click(Context context,RemoteViews remoteViews ,int id,String msg) {
        Intent intent = new Intent();
        intent.setAction("gejw.android.widget1");
        intent.putExtra("msg", msg);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(context, id,
                intent, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteViews.setOnClickPendingIntent(id, pendingIntent);
    }
}

 

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