android桌面插件每秒刷新

android桌面插件每秒刷新

一、需求
桌面插件每秒更新信息
二、实现
1.首先创建App Widget

2.修改桌面布局代码
new_app_widget.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    style="@style/Widget.GeoApplication.AppWidget.Container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:theme="@style/Theme.GeoApplication.AppWidgetContainer">

    <TextView
        android:id="@+id/appwidget_text"
        style="@style/Widget.GeoApplication.AppWidget.InnerView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:layout_margin="8dp"
        android:contentDescription="@string/appwidget_text"
        android:text="@string/appwidget_text"
        android:textSize="24sp"
        android:textStyle="bold|italic" />

    <ImageView
        android:id="@+id/appwidget_image"
        style="@style/Widget.GeoApplication.AppWidget.InnerView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:layout_margin="8dp"
        android:src="@drawable/ic_launcher_foreground"
        android:contentDescription="@string/appwidget_text"
        android:text="@string/appwidget_text"
        android:textSize="24sp"
        android:textStyle="bold|italic" />
RelativeLayout>

3.桌面插件被创建的时候，使用Alarm定时器刷新。
在onUpdate 方法中
NewAppWidge.kt

override fun onUpdate(
    context: Context,
    appWidgetManager: AppWidgetManager,
    appWidgetIds: IntArray
) {
    // There may be multiple widgets active, so update all of them
    //使用Alarm定时更新界面数据
    val alarm = context?.getSystemService(Context.ALARM_SERVICE) as AlarmManager
    val intent = Intent(AppWidgetManager.ACTION_APPWIDGET_UPDATE)
    val pendingIntentTwo =
        PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
    val triggerAtTime = SystemClock.elapsedRealtime() + (10 * 1000)
    val interval = 10 * 1000L
    alarm.setRepeating(AlarmManager.RTC, triggerAtTime, interval, pendingIntentTwo)

    for (appWidgetId in appWidgetIds) {
        updateAppWidget(context, appWidgetManager, appWidgetId)
    }
}

在onReceive方法中

override fun onReceive(context: Context?, intent: Intent?) {
    super.onReceive(context, intent)
    //获取桌面控件的视图
    context?.let {
        val ids = AppWidgetManager.getInstance(context).getAppWidgetIds(
            ComponentName(
                context,
                NewAppWidget::class.java
            )
        )
        onUpdate(context, AppWidgetManager.getInstance(context),ids)
    }
}

这时候调用插件就可以更新了