Question

我创建了一个简单的小部件，使用饼图/圆环图（圆形进度条）显示相同的数据。我想使用一些外部组件，所以我选择了：

    let rec smallest_divisor : int -> int
    =fun n -> let i = ref 2 if n mod !i = 0 then i else (i :!i+1; smallest_divisor(n))

我将ArcProgress组件放到我的widget.xml中，我可以在预览选项卡中清楚地看到它。没有编译，构建或任何其他错误。当我运行应用程序并将小部件放到主屏幕时，我面临一个例外：

com.github.lzyzsd.circleprogress.ArcProgress

我认为gradle存在一些问题，因为我的第一次尝试是：

W/AppWidgetHostView: updateAppWidget couldn't find any view, using error view
      android.view.InflateException: Binary XML file line #37: Binary XML file line #37: Error inflating class com.github.lzyzsd.circleprogress.ArcProgress
      Caused by: android.view.InflateException: Binary XML file line #37: Error inflating class com.github.lzyzsd.circleprogress.ArcProgress
      Caused by: java.lang.ClassNotFoundException: Didn't find class "com.github.lzyzsd.circleprogress.ArcProgress" on path: DexPathList[[zip file "/data/app/com.sec.android.app.launcher-2/base.apk", zip file "/data/app/com.sec.android.app.launcher-2/base.apk"],nativeLibraryDirectories=[/data/app/com.sec.android.app.launcher-2/lib/arm64, /system/lib64, /vendor/lib64]]
          at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
          at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
          at android.view.LayoutInflater.createView(LayoutInflater.java:616)
          at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:794)
          at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
          at android.view.LayoutInflater.rInflate(LayoutInflater.java:865)
          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
          at android.view.LayoutInflater.rInflate(LayoutInflater.java:873)
          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:828)
          at android.view.LayoutInflater.inflate(LayoutInflater.java:525)
          at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
          at android.widget.RemoteViews.inflateView(RemoteViews.java:3844)
          at android.widget.RemoteViews.apply(RemoteViews.java:3808)
          at android.appwidget.AppWidgetHostView.applyRemoteViews(AppWidgetHostView.java:456)
          at android.appwidget.AppWidgetHostView.updateAppWidget(AppWidgetHostView.java:385)
          at com.android.launcher3.home.LauncherAppWidgetHostView.updateAppWidget(LauncherAppWidgetHostView.java:161)
          at android.appwidget.AppWidgetHost.updateAppWidgetView(AppWidgetHost.java:418)
          at android.appwidget.AppWidgetHost$UpdateHandler.handleMessage(AppWidgetHost.java:136)
          at android.os.Handler.dispatchMessage(Handler.java:102)
          at android.os.Looper.loop(Looper.java:154)
          at android.app.ActivityThread.main(ActivityThread.java:6776)
          at java.lang.reflect.Method.invoke(Native Method)
          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)

并且结果相同（但ClassNotFound当然是“az.plainpie.PieView”）。

我的widget.xml：

az.plainpie.PieView

项目gradle：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:custom="http://schemas.android.com/tools"
              xmlns:app="http://schemas.android.com/apk/res-auto"
              android:orientation="horizontal"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:padding="@dimen/widget_margin"
              android:background="#AA000000">
              <!--xmlns:plainpie="http://schemas.android.com/apk/res-auto"-->


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/countryView"
        android:visibility="visible">

<!--        <az.plainpie.PieView
            android:id="@+id/globalValue"
            android:layout_width="100dp"
            android:layout_height="100dp"
            plainpie:inner_pie_padding="10"
            plainpie:percentage="75"
            plainpie:percentage_size="35"
            plainpie:inner_text_visibility="true"/>  -->

        <com.github.lzyzsd.circleprogress.ArcProgress
            android:id="@+id/arc_progress"
            android:layout_width="100dp"
            android:layout_height="100dp"
            app:arc_bottom_text_size="10sp"
            app:arc_progress="55"
            app:arc_bottom_text="VALUE"/>

        <TextView
            android:id="@+id/countryText"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:text="temp"
            android:textSize="@dimen/text_size_big"
            android:textStyle="bold"
            android:textColor="@color/colorWhite"/>

    </LinearLayout>
</LinearLayout>

模块gradle：

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.2.2'
        classpath 'me.tatarka:gradle-retrolambda:3.6.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url "https://jitpack.io" }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

我尝试过干净的项目，卸载应用程序，使用不同的手机。我的Android Studio取消选中“离线工作”并检查推荐的“默认gradle包装器”。我搜索了解决方案，但没有一个解决了我的问题。你能看出出了什么问题吗？

Answer 1

很遗憾，您不能像在the documentation中那样在App小部件中使用这些自定义视图：

如果您熟悉Layouts，则创建App Widget布局很简单。但是，您必须知道App Widget布局是基于的在RemoteViews上，不支持所有类型的布局或视图小部件。

在Android: AppWidget with custom view not working

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