如何在Android中从widget打开应用程序？

当我们当时点击小部件时，我需要打开一个活动屏幕（或应用程序）。如何做到这一点？

您需要在小部件上设置OnClickPendingEvent

Intent intent = new Intent(context, ExampleActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
// Get the layout for the App Widget and attach an on-click listener to the button
RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.appwidget_provider_layout);
views.setOnClickPendingIntent(R.id.button, pendingIntent);

看看这个

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应用程序小部件的Android开发者页面提供了相关信息和一个完整的示例：

将此代码包含在yout WidgetProvider类的onUpdate（）方法中

for（int j=0；j

使用Kotlin

您需要在单击小部件视图时添加

pendingent

remoteViews.setOnClickPendingIntent(R.id.widgetRoot, 
               PendingIntent.getActivity(context, 0, Intent(context, MainActivity::class.java), 0))

其中widgetRoot是我的小部件的父级的id

ViewGroup

更新时进入

挂起的意图通常添加在更新回调中

    override fun onUpdate(
        context: Context,
        appWidgetManager: AppWidgetManager,
        appWidgetIds: IntArray) {

        // There may be multiple widgets active, so update all of them
        val widgetIds = appWidgetManager.getAppWidgetIds( ComponentName(context, ClockWidget::class.java))
        for (appWidgetId in widgetIds) {

                // Construct the RemoteViews object
                val remoteViews = RemoteViews(context.packageName, R.layout.clock_widget)

               //Open App on Widget Click
                remoteViews.setOnClickPendingIntent(R.id.weatherRoot,  
   PendingIntent.getActivity(context, 0, Intent(context, MainActivity::class.java), 0))

                //Update Widget 
                remoteViews.setTextViewText(R.id.appWidgetText, Date().toString())
                appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
            }
        }
    }

非常简单（在xamarin c#android mono中）：

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附带问题，您能否提取特定应用程序的活动？（也许我不知道什么课是ExampleActivity.class）谁投票支持这个非理性？答案在哪里？这家伙问“如何从窗口小部件按钮打开应用程序”而不是“如何在窗口小部件按钮上设置操作”“您的应用程序包”“应用程序主要活动的完全限定名称”的意思是

intent.setComponent（新组件名（context.getPackageName（），MainActivity.class.getName（））；

    override fun onUpdate(
        context: Context,
        appWidgetManager: AppWidgetManager,
        appWidgetIds: IntArray) {

        // There may be multiple widgets active, so update all of them
        val widgetIds = appWidgetManager.getAppWidgetIds( ComponentName(context, ClockWidget::class.java))
        for (appWidgetId in widgetIds) {

                // Construct the RemoteViews object
                val remoteViews = RemoteViews(context.packageName, R.layout.clock_widget)

               //Open App on Widget Click
                remoteViews.setOnClickPendingIntent(R.id.weatherRoot,  
   PendingIntent.getActivity(context, 0, Intent(context, MainActivity::class.java), 0))

                //Update Widget 
                remoteViews.setTextViewText(R.id.appWidgetText, Date().toString())
                appWidgetManager.updateAppWidget(appWidgetId, remoteViews);
            }
        }
    }

public override void OnReceive(Context context, Intent intent)
        {
            if (ViewClick.Equals(intent.Action))
            {
                var pm = context.PackageManager;
                try
                {
                    var packageName = "com.companyname.YOURPACKAGENAME";
                    var launchIntent = pm.GetLaunchIntentForPackage(packageName);
                    context.StartActivity(launchIntent);
                }
                catch
                {
                    // Something went wrong :)
                }
            }
            base.OnReceive(context, intent);

        }