Question

为什么在Android Studio中这种相对简单的布局渲染？

当我在Android Studio中打开此文件时，我看到＆＃34;渲染问题＆＃34;而不是渲染的布局预览。以及下面显示的错误列表。但是在设备上运行时看起来很好。

然而，对布局的一些调整将导致它被渲染......

将按钮设置为宽度为0dp
交换LinearLayouts layout_1和layout_2
将layout_1或layout_2的高度降低为100dp
从滚动视图中删除LinearLayouts

当我将项目迁移到Gradle和API 21时，这只会成为一个问题。

将无法在Android Studio中呈现的布局

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


<ScrollView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/scrollView2" >

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/d">

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:id="@+id/layout_1"
            android:layout_marginTop="@dimen/list_item_vertical_padding">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="400dp"
                android:text="New Text"
                android:id="@+id/textView2" />

        </LinearLayout>

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:id="@+id/layout_2"
            android:clickable="false"
            android:layout_marginTop="@dimen/list_item_vertical_padding">

            <LinearLayout
                android:orientation="vertical"
                android:layout_width="fill_parent"
                android:layout_height="300dp"
                android:id="@+id/interface_2"
                android:showDividers="end"
           android:divider="@android:drawable/divider_horizontal_textfield">

                <!-- Stuff gets inflated into here -->

            </LinearLayout>

            <LinearLayout
                android:orientation="horizontal"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:id="@+id/stats_button_container"
                android:focusableInTouchMode="false">

                <Button
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:text="@string/all_data"
                    android:id="@+id/stats_range_button_1"
                    android:layout_gravity="center"
                    android:textAlignment="center"
                    android:singleLine="false"
                    android:clickable="true"
                    android:layout_margin="5dp"
                    android:textColor="@color/standard_text_on_white"
                    android:layout_weight="1" />

                <Button
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:text="@string/six_months_of_data"
                    android:id="@+id/stats_range_button_2"
                    android:layout_gravity="center"
                    android:textAlignment="center"
                    android:singleLine="false"
                    android:clickable="true"
                    android:layout_margin="5dp"
                    android:textColor="@color/standard_text_on_white"
                    android:layout_weight="1" />

                <Button
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:text="@string/one_month_of_data"
                    android:id="@+id/stats_range_button_3"
                    android:layout_gravity="center"
                    android:textAlignment="center"
                    android:singleLine="false"
                    android:layout_margin="5dp"
                    android:textColor="@color/standard_text_on_white"
                    android:layout_weight="1" />
            </LinearLayout>
        </LinearLayout>

    </LinearLayout>
</ScrollView>

显示java.lang.NullPointerException 在android.view.ViewGroup_Delegate.drawShadow（ViewGroup_Delegate.java:74）在android.view.ViewGroup_Delegate.drawChild（ViewGroup_Delegate.java:61）在android.view.ViewGroup.drawChild（ViewGroup.java:3404）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3198）在android.view.View.draw（View.java:15017）在android.view.ViewGroup.drawChild_Original（ViewGroup.java:3404）在android.view.ViewGroup_Delegate.drawChild（ViewGroup_Delegate.java:53）在android.view.ViewGroup.drawChild（ViewGroup.java:3404）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3198）在android.view.View.draw（View.java:15017）在android.view.ViewGroup.drawChild_Original（ViewGroup.java:3404）在android.view.ViewGroup_Delegate.drawChild（ViewGroup_Delegate.java:53）在android.view.ViewGroup.drawChild（ViewGroup.java:3404）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3198）在android.view.View.draw（View.java:15017）在android.view.ViewGroup.drawChild_Original（ViewGroup.java:3404）在android.view.ViewGroup_Delegate.drawChild（ViewGroup_Delegate.java:53）在android.view.ViewGroup.drawChild（ViewGroup.java:3404）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3198）在android.view.View.draw（View.java:15117）在android.widget.FrameLayout.draw（FrameLayout.java:592）在android.widget.ScrollView.draw（ScrollView.java:1689）在android.view.View.draw（View.java:15022）在android.view.ViewGroup.drawChild_Original（ViewGroup.java:3404）在android.view.ViewGroup_Delegate.drawChild（ViewGroup_Delegate.java:53）在android.view.ViewGroup.drawChild（ViewGroup.java:3404）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3198）在android.view.View.draw（View.java:15017）在android.view.ViewGroup.drawChild_Original（ViewGroup.java:3404）在android.view.ViewGroup_Delegate.drawChild（ViewGroup_Delegate.java:53）在android.view.ViewGroup.drawChild（ViewGroup.java:3404）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3198）在android.view.View.draw（View.java:15017）在android.view.ViewGroup.drawChild_Original（ViewGroup.java:3404）在android.view.ViewGroup_Delegate.drawChild（ViewGroup_Delegate.java:53）在android.view.ViewGroup.drawChild（ViewGroup.java:3404）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3198）在android.view.View.draw（View.java:15117）在android.view.View.draw（View.java:15022）在android.view.ViewGroup.drawChild_Original（ViewGroup.java:3404）在android.view.ViewGroup_Delegate.drawChild（ViewGroup_Delegate.java:53）在android.view.ViewGroup.drawChild（ViewGroup.java:3404）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3198）在android.view.View.draw（View.java:15117）在com.android.layoutlib.bridge.impl.RenderSessionImpl.render（RenderSessionImpl.java:587）在com.android.layoutlib.bridge.Bridge.createSession（Bridge.java:334）在com.android.ide.common.rendering.LayoutLibrary.createSession（LayoutLibrary.java:350）在com.android.tools.idea.rendering.RenderService $ 5.compute（RenderService.java:708）在com.android.tools.idea.rendering.RenderService $ 5.compute（RenderService.java:697）在com.intellij.openapi.application.impl.ApplicationImpl.runReadAction（ApplicationImpl.java:932）在com.android.tools.idea.rendering.RenderService.createRenderSession（RenderService.java:697）在com.android.tools.idea.rendering.RenderService.render（RenderService.java:816）在org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.doRender（AndroidLayoutPreviewToolWindowManager.java:646）在org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager.access $ 1700（AndroidLayoutPreviewToolWindowManager.java:82）在org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager $ 7 $ 1.run（AndroidLayoutPreviewToolWindowManager.java:589）在com.intellij.openapi.progress.impl.ProgressManagerImpl $ 2.run（ProgressManagerImpl.java:178）在com.intellij.openapi.progress.ProgressManager.executeProcessUnderProgress（ProgressManager.java:209）在com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress（ProgressManagerImpl.java:212）在com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcess（ProgressManagerImpl.java:171）在org.jetbrains.android.uipreview.AndroidLayoutPreviewToolWindowManager $ 7.run（AndroidLayoutPreviewToolWindowManager.java:584）在com.intellij.util.ui.update.MergingUpdateQueue.execute（MergingUpdateQueue.java:320）在com.intellij.util.ui.update.MergingUpdateQueue.execute（MergingUpdateQueue.java:310）在com.intellij.util.ui.update.MergingUpdateQueue $ 2.run（MergingUpdateQueue.java:254）在com.intellij.util.ui.update.MergingUpdateQueue.flush（MergingUpdateQueue.java:269）在com.intellij.util.ui.update.MergingUpdateQueue.flush（MergingUpdateQueue.java:227）在com.intellij.util.ui.update.MergingUpdateQueue.run（MergingUpdateQueue.java:217）在com.intellij.util.concurrency.QueueProcessor.runSafely（QueueProcessor.java:238）在com.intellij.util.Alarm $ Request $ 1.run（Alarm.java:327） at java.util.concurrent.Executors $ RunnableAdapter.call（Executors.java:471） at java.util.concurrent.FutureTask $ Sync.innerRun（FutureTask.java:334） at java.util.concurrent.FutureTask.run（FutureTask.java:166）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1145） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:615）在java.lang.Thread.run（Thread.java:724）

Android Studio无法呈现简单的布局

0 个答案: