多行文字在Android Studio 3中缩小到左上角

Question

我正在学习科特林。我遵循了一个教程，其中应将一些随机文本放入editText框中。但是，每当我在texbox中放入过多行文本时，布局上的所有内容都会缩小到左上角。

我试图使缓存无效，并且尝试更改为另一个api，但到目前为止还没有运气。有任何想法吗 ？

这是android studio向我抛出的错误：

java.lang.ArrayIndexOutOfBoundsException: 16
at android.text.StaticLayout.generate(StaticLayout.java:854)
at android.text.DynamicLayout.reflow(DynamicLayout.java:609)
at android.text.DynamicLayout.generate(DynamicLayout.java:477)
at android.text.DynamicLayout.<init>(DynamicLayout.java:396)
at android.text.DynamicLayout.<init>(DynamicLayout.java:45)
at android.text.DynamicLayout$Builder.build(DynamicLayout.java:278)
at android.widget.TextView.makeSingleLayout(TextView.java:8329)
at android.widget.TextView.makeNewLayout(TextView.java:8204)
at android.widget.TextView.assumeLayout(TextView.java:8104)
at android.widget.TextView.onPreDraw(TextView.java:6742)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:977)
at android.view.AttachInfo_Accessor.dispatchOnPreDraw(AttachInfo_Accessor.java:46)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.renderAndBuildResult(RenderSessionImpl.java:404)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.renderAndBuildResult(RenderSessionImpl.java:543)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:426)
at com.android.layoutlib.bridge.BridgeRenderSession.render(BridgeRenderSession.java:108)
at com.android.ide.common.rendering.api.RenderSession.render(RenderSession.java:154)
at com.android.ide.common.rendering.api.RenderSession.render(RenderSession.java:136)
at com.android.tools.idea.rendering.RenderTask.lambda$renderInner$5(RenderTask.java:671)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$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)

Answer 1

这是因为您正在使用ConstraintLayout。

使用它时，必须将Constraints添加到View的每一个中，以便将它们放置在Layout中的适当位置。

更多信息，您可以Check this ans

Answer 2

我在做一些Kotlin for Android课程时遇到了类似的问题。

当我向多行文本（带有textMultiline输入类型的editText）添加文本的时间长于窗口小部件中可见的时间时，渲染器崩溃。这是Android Studio提供的堆栈跟踪：

16 View Measure Failed

java.lang.ArrayIndexOutOfBoundsException: 16
at android.text.StaticLayout.generate(StaticLayout.java:854)
at android.text.DynamicLayout.reflow(DynamicLayout.java:609)
at android.text.DynamicLayout.generate(DynamicLayout.java:477)
at android.text.DynamicLayout.<init>(DynamicLayout.java:396)
at android.text.DynamicLayout.<init>(DynamicLayout.java:45)
at android.text.DynamicLayout$Builder.build(DynamicLayout.java:278)
at android.widget.TextView.makeSingleLayout(TextView.java:8329)
at android.widget.TextView.makeNewLayout(TextView.java:8204)
at android.widget.TextView.onMeasure(TextView.java:8586)
at android.view.View.measure_Original(View.java:23169)
at android.view.View_Delegate.measure(View_Delegate.java:80)
at android.view.View.measure(View.java:23133)
at android.support.constraint.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:1227)
at android.support.constraint.ConstraintLayout.onMeasure_Original(ConstraintLayout.java:1572)
at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java)
at android.view.View.measure_Original(View.java:23169)
at android.view.View_Delegate.measure(View_Delegate.java:80)
at android.view.View.measure(View.java:23133)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6749)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
at android.support.v7.widget.ContentFrameLayout.onMeasure_Original(ContentFrameLayout.java:143)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java)
at android.view.View.measure_Original(View.java:23169)
at android.view.View_Delegate.measure(View_Delegate.java:80)
at android.view.View.measure(View.java:23133)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6749)
at android.support.v7.widget.ActionBarOverlayLayout.onMeasure_Original(ActionBarOverlayLayout.java:401)
at android.support.v7.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java)
at android.view.View.measure_Original(View.java:23169)
at android.view.View_Delegate.measure(View_Delegate.java:80)
at android.view.View.measure(View.java:23133)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:715)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
at android.view.View.measure_Original(View.java:23169)
at android.view.View_Delegate.measure(View_Delegate.java:80)
at android.view.View.measure(View.java:23133)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.measureView(RenderSessionImpl.java:592)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:345)
at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:386)
at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:193)
at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:450)
at com.android.tools.idea.rendering.RenderTask.lambda$inflate$3(RenderTask.java:590)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$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)

和

16 Exception raised during rendering

java.lang.ArrayIndexOutOfBoundsException: 16
at android.text.StaticLayout.generate(StaticLayout.java:854)
at android.text.DynamicLayout.reflow(DynamicLayout.java:609)
at android.text.DynamicLayout.generate(DynamicLayout.java:477)
at android.text.DynamicLayout.<init>(DynamicLayout.java:396)
at android.text.DynamicLayout.<init>(DynamicLayout.java:45)
at android.text.DynamicLayout$Builder.build(DynamicLayout.java:278)
at android.widget.TextView.makeSingleLayout(TextView.java:8329)
at android.widget.TextView.makeNewLayout(TextView.java:8204)
at android.widget.TextView.assumeLayout(TextView.java:8104)
at android.widget.TextView.onPreDraw(TextView.java:6742)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:977)
at android.view.AttachInfo_Accessor.dispatchOnPreDraw(AttachInfo_Accessor.java:46)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.renderAndBuildResult(RenderSessionImpl.java:404)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.renderAndBuildResult(RenderSessionImpl.java:543)
at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:426)
at com.android.layoutlib.bridge.BridgeRenderSession.render(BridgeRenderSession.java:108)
at com.android.ide.common.rendering.api.RenderSession.render(RenderSession.java:154)
at com.android.ide.common.rendering.api.RenderSession.render(RenderSession.java:136)
at com.android.tools.idea.rendering.RenderTask.lambda$renderInner$5(RenderTask.java:671)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$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)

这是我的布局：

<TextView
        android:text="TextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textView" android:layout_marginTop="16dp" app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="16dp"/>

<Button
        android:text="Cancel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginEnd="16dp" app:layout_constraintEnd_toEndOf="parent" android:layout_marginBottom="16dp"
        android:id="@+id/cancelButton"/>
<Button
        android:text="OK"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/okButton"
        app:layout_constraintEnd_toStartOf="@+id/cancelButton"
        android:layout_marginEnd="32dp"
        app:layout_constraintBaseline_toBaselineOf="@+id/cancelButton"/>
<EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textMultiLine"
        android:ems="10"
        android:id="@+id/editText2"
        android:text='Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum'
        app:layout_constraintStart_toEndOf="@+id/textView"
        android:layout_marginStart="16dp" android:layout_marginTop="16dp"
        app:layout_constraintTop_toBottomOf="@+id/textView" android:layout_marginEnd="16dp"
        app:layout_constraintEnd_toEndOf="parent" android:layout_marginBottom="16dp"
        app:layout_constraintBottom_toTopOf="@+id/okButton"/>

我正在使用Android Studio 3.2.1

当然，小部件的高度大于屏幕尺寸，导致其溢出到设计者的主屏幕之外，在我的情况下，它只是崩溃了。

Answer 3

如果您在Android Studio的属性编辑器中粘贴多行文本，则换行符将从字符串中删除，结果字符串可能太长而无法处理。

如果必须在textMultiLine小部件中得到一个很长的硬编码字符串，请将其放在xml编辑器中，并在此过程中添加换行符。

android:text="line1
line2
line3"

我不知道一行的最大允许长度是多少，或者这是否是错误或功能-刚遇到它并像这样解决。