CalendarView在API 22及更低版本中不可见

时间：2016-04-10 03:16:59

标签： android android-studio android-emulator google-calendar-api android-calendar

我有这个xml，我在那里显示一个CalendarView和一堆按钮。

 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/drawerActivity"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:tools="http://schemas.android.com/tools"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingBottom="@dimen/activity_vertical_margin"
            android:paddingLeft="@dimen/activity_horizontal_margin"
            android:paddingRight="@dimen/activity_horizontal_margin"
            android:paddingTop="@dimen/activity_vertical_margin"
            tools:context="com.teamtreehouse.oslist.MainActivity4">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <CalendarView
                    android:id="@+id/calendarView"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" />


                <TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
                    android:id="@+id/tableLayout"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/calendarView"
                    android:padding="5dp"
                    android:stretchColumns="0"
                    android:textAlignment="center">

                    <TableRow
                        android:id="@+id/tableRow1"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="horizontal">

                        <Button
                            android:id="@+id/trackAttendance"
                            android:layout_width="50dp"
                            android:layout_height="wrap_content"
                            android:layout_marginBottom="5dp"
                            android:layout_marginTop="5dp"
                            android:background="@drawable/mybuttons"
                            android:paddingLeft="30dp"
                            android:paddingRight="30dp"
                            android:text="Track Class Attendance"
                            android:textColor="#ffffff"
                            android:textSize="17dp"></Button>
                    </TableRow>

                    <TableRow
                        android:id="@+id/tableRow2"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="horizontal">

                        <Button
                            android:id="@+id/trackSessions"
                            android:layout_width="50dp"
                            android:layout_height="wrap_content"
                            android:layout_marginBottom="5dp"
                            android:layout_marginTop="5dp"
                            android:background="@drawable/mybuttons"
                            android:paddingLeft="30dp"
                            android:paddingRight="30dp"
                            android:text="Track Study Sessions"
                            android:textColor="#ffffff"
                            android:textSize="17dp"></Button>
                    </TableRow>

                    <TableRow
                        android:id="@+id/tableRow3"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="horizontal">

                        <Button
                            android:id="@+id/trackActivities"
                            android:layout_width="50dp"
                            android:layout_height="wrap_content"
                            android:layout_marginBottom="5dp"
                            android:layout_marginTop="5dp"
                            android:background="@drawable/mybuttons"
                            android:paddingLeft="30dp"
                            android:paddingRight="30dp"
                            android:text="Track Class Activities"
                            android:textColor="#ffffff"
                            android:textSize="17dp"></Button>
                    </TableRow>

                </TableLayout>

            </RelativeLayout>
        </ScrollView>

        <ListView
            android:id="@+id/navList"
            android:layout_width="200dp"
            android:layout_height="match_parent"
            android:layout_gravity="left|start"
            android:background="#ffeeeeee"
            android:choiceMode="singleChoice" />
    </android.support.v4.widget.DrawerLayout>
</LinearLayout>

我尝试在5.0.2或更低版本的设备上安装已签名的APK，并发现CalendarView根本没有显示。事实上只是显示月份和年份。 CalendarView在API 23中可见，但在其下方则不可见。任何帮助表示赞赏。

修改 这是堆栈跟踪

java.lang.NullPointerException
at android.graphics.Canvas_Delegate$11.draw(Canvas_Delegate.java:974)
at com.android.layoutlib.bridge.impl.GcSnapshot.drawOnGraphics(GcSnapshot.java:654)
at com.android.layoutlib.bridge.impl.GcSnapshot.drawInLayer(GcSnapshot.java:606)
at com.android.layoutlib.bridge.impl.GcSnapshot.draw(GcSnapshot.java:582)
at android.graphics.Canvas_Delegate.draw(Canvas_Delegate.java:937)
at android.graphics.Canvas_Delegate.drawText(Canvas_Delegate.java:960)
at android.graphics.Canvas_Delegate.native_drawText(Canvas_Delegate.java:847)
at android.graphics.Canvas_Delegate.native_drawText(Canvas_Delegate.java:859)
at android.graphics.Canvas.native_drawText(Canvas.java)
at android.graphics.Canvas.drawText(Canvas.java:1665)
at android.widget.CalendarViewLegacyDelegate$WeekView.drawWeekNumbersAndDates(CalendarViewLegacyDelegate.java:1434)
at android.widget.CalendarViewLegacyDelegate$WeekView.onDraw(CalendarViewLegacyDelegate.java:1355)
at android.view.View.draw(View.java:15231)
at android.view.View.draw(View.java:15140)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.widget.ListView.drawChild(ListView.java:3396)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.widget.AbsListView.dispatchDraw(AbsListView.java:2603)
at android.widget.ListView.dispatchDraw(ListView.java:3391)
at android.view.View.draw(View.java:15234)
at android.widget.AbsListView.draw(AbsListView.java:4110)
at android.view.View.draw(View.java:15140)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15138)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15138)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15138)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15234)
at android.widget.FrameLayout.draw(FrameLayout.java:598)
at android.widget.ScrollView.draw(ScrollView.java:1689)
at android.view.View.draw(View.java:15140)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.support.v4.widget.DrawerLayout.drawChild(DrawerLayout.java:1229)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15138)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15138)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15138)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15138)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15234)
at android.view.View.draw(View.java:15140)
at android.view.ViewGroup.drawChild_Original(ViewGroup.java:3405)
at android.view.ViewGroup_Delegate.drawChild(ViewGroup_Delegate.java:65)
at android.view.ViewGroup.drawChild(ViewGroup.java:3405)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198)
at android.view.View.draw(View.java:15234)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:601)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:323)
at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:510)
at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:498)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:967)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:498)
at com.android.tools.idea.rendering.RenderTask.access$600(RenderTask.java:72)
at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:610)
at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:607)
at com.android.tools.idea.rendering.RenderService.runRenderAction(RenderService.java:359)
at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:607)
at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:629)
at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$7.run(AndroidDesignerEditorPanel.java:519)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:337)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:327)
at com.intellij.util.ui.update.MergingUpdateQueue$3.run(MergingUpdateQueue.java:271)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:286)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:244)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:234)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:352)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

1 个答案:

答案 0 :(得分：2)

我在我的类文件中使用了try {} catch (\PDOException $e) {} ，setSelectedWeekBackgroundColor等弃用的方法。删除这些行并将其替换为xml代码。现在工作正常。

修改 仍然没有工作

<强> EDIT2 最后工作使用硬编码高度日历

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