如何启动插件按钮后，活动pressed？ [英] how to launch activity after widget button is pressed?

问题描述

继本的教程中，我迅速地创建了一个简单的小部件，其显示的当前时间在主屏幕上：

我已经修改了code，这样的小工具还带有一个按钮。我的目标是推出一项活动，一旦按钮获取的pressed。 不幸的是，我真的不知道从哪里听来的按钮点击。这是否要进入广播接收器清单文件的部分？

 ＆LT;！ - 广播接收器 - ＆GT;
＆LT;接收机器人：WifiSSIDWidget名称=机器人：标签=@字符串/ APP_NAME＆GT;
    ＆LT;意向滤光器＆gt; ＆lt;作用机器人：名称=android.appwidget.action.APPWIDGET_UPDATE/＆GT;
    ＆所述; /意图滤光器＆gt;
    ＆LT;元数据的android：NAME =android.appwidget.provider安卓资源=@ XML / wifi_ssid_widget_provider/＆GT;
＆LT; /接收器＆GT;
 

抑或是code，而进入的onupdate ？这里的小部件类code：

 公共类HelloWidget的扩展AppWidgetProvider {

    @覆盖
    公共无效的OnUpdate（上下文的背景下，AppWidgetManager appWidgetManager，INT [] appWidgetIds）{

        定时器定时=新的Timer（）;
        timer.scheduleAtFixedRate（新数值指明MyTime（上下文，appWidgetManager），1，1000）;
    }

    私有类数值指明MyTime扩展的TimerTask {
        RemoteViews remoteViews;
        AppWidgetManager appWidgetManager;
        组件名thisWidget;
        日期格式FORMAT = SimpleDateFormat.getTimeInstance（SimpleDateFormat.MEDIUM，Locale.getDefault（））;

    公共数值指明MyTime（上下文的背景下，AppWidgetManager appWidgetManager）{
        this.appWidgetManager = appWidgetManager;
        remoteViews =新RemoteViews（context.getPackageName（），R.layout.main）;
        thisWidget =新的组件名（背景下，HelloWidget.class）;
    }

    @覆盖
    公共无效的run（）{
        remoteViews.setTextViewText（R.id.widget_textview，TIME =+ format.format（新日期（）））;
        appWidgetManager.updateAppWidget（thisWidget，remoteViews）;
    }

    }
}
 

下面就是我要的是点击按钮后，被称为code：

 公共无效openWifiSettings（）{
    最终意向意图=新的意图（Intent.ACTION_MAIN，NULL）;
    intent.addCategory（Intent.CATEGORY_LAUNCHER）;
    最终的组件名CN =新的组件名（com.android.settings，com.android.settings.wifi.WifiSettings）;
    intent.setComponent（CN）;
    intent.setFlags（Intent.FLAG_ACTIVITY_NEW_TASK）;
    startActivity（意向）;
}
 

解决方案

 进口android.app.PendingIntent;
...
公共静态最后弦乐ACTION_BUTTON1_CLICKED =com.example.myapp.BUTTON1_CLICKED;
 

在的onupdate 以下内容添加到您的按钮：

 意向意图=新的意图（ACTION_BUTTON1_CLICKED）;
PendingIntent pendingIntent = PendingIntent.getBroadcast（上下文，0，意图，0）;
remoteViews.setOnClickPendingIntent（R.id.button_1，pendingIntent）;
 

和的onReceive 您AppWidget的

  @覆盖
公共无效的onReceive（上下文的背景下，意图意图）
{
 Log.d（TAG的onReceive（）+ intent.getAction（））;
 super.onReceive（背景下，意图）;
...
如果（ACTION_BUTTON1_CLICKED.equals（intent.getAction（）））
{
 //你的code
}
 

也是你的意图添加到清单

 ＆LT;意向滤光器＆gt;
   ＆lt;作用机器人：名称=com.example.myapp.BUTTON1_CLICKED/＆GT;
   ....
 

Following this tutorial I quickly created a simple widget which displays the current time on the home screen:

I've modified the code so that the widget also comes with a button. My goal is to launch an activity, once the button get's pressed. Unfortunately, I do not really understand where to listen to the button click. Does this have to go into the broadcast receiver section of the manifest file?

<!--  Broadcast Receiver -->
<receiver android:name=".WifiSSIDWidget" android:label="@string/app_name">
    <intent-filter> <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/> 
    </intent-filter>
    <meta-data android:name="android.appwidget.provider" android:resource="@xml/wifi_ssid_widget_provider" />
</receiver>    

Or does the code rather go into onUpdate? Here's the widget class code:

public class HelloWidget extends AppWidgetProvider {

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

        Timer timer = new Timer();
        timer.scheduleAtFixedRate(new MyTime(context, appWidgetManager), 1, 1000);
    }

    private class MyTime extends TimerTask {
        RemoteViews remoteViews;
        AppWidgetManager appWidgetManager;
        ComponentName thisWidget;
        DateFormat format = SimpleDateFormat.getTimeInstance(SimpleDateFormat.MEDIUM, Locale.getDefault());

    public MyTime(Context context, AppWidgetManager appWidgetManager) {
        this.appWidgetManager = appWidgetManager;
        remoteViews = new RemoteViews(context.getPackageName(), R.layout.main);
        thisWidget = new ComponentName(context, HelloWidget.class);
    }

    @Override
    public void run() {
        remoteViews.setTextViewText(R.id.widget_textview, "TIME = " +format.format(new Date()));
        appWidgetManager.updateAppWidget(thisWidget, remoteViews);
    }

    } 
}

Here's the code that I want to be called after the button is clicked:

public void openWifiSettings() {
    final Intent intent = new Intent(Intent.ACTION_MAIN, null);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    final ComponentName cn = new ComponentName("com.android.settings", "com.android.settings.wifi.WifiSettings");
    intent.setComponent(cn);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);
}   

解决方案

import android.app.PendingIntent;
...
public static final String ACTION_BUTTON1_CLICKED = "com.example.myapp.BUTTON1_CLICKED";

in onUpdate add the following to your button:

Intent intent = new Intent(ACTION_BUTTON1_CLICKED);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
remoteViews.setOnClickPendingIntent(R.id.button_1, pendingIntent);

and in onReceive of your AppWidget

@Override
public void onReceive(Context context, Intent intent)
{
 Log.d(TAG, "onReceive() " + intent.getAction());
 super.onReceive(context, intent);
...
if (ACTION_BUTTON1_CLICKED.equals(intent.getAction()))
{
 // your code
}

also add your intent to the manifest

<intent-filter>
   <action android:name="com.example.myapp.BUTTON1_CLICKED" />
   ....

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