带有椭圆中间的TextView导致“ArrayIndexOutOfBoundsException”异常

Question

已编辑：

我得到了java.lang.ArrayIndexOutOfBoundsException: 异常 用于椭圆大小为middle 的TextView。这是我的文本视图

        <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="25dp"
        android:layout_marginRight="25dp"
        android:ellipsize="middle"
        android:maxLines="1"
        android:paddingLeft="10dp"
        android:paddingRight="27dp"
        android:text="123456 123 1234567890123456"
        android:textSize="16sp" />

我已经用这个给定的边距、填充、textSize 和 singleLine 试验了这个 Exception 及其导致 calculateEllipsis() 方法的原因。

这是崩溃日志

FATAL EXCEPTION: main
    java.lang.ArrayIndexOutOfBoundsException: length=125; index=-1
        at android.text.StaticLayout.calculateEllipsis(StaticLayout.java:786)
        at android.text.StaticLayout.out(StaticLayout.java:705)
        at android.text.StaticLayout.generate(StaticLayout.java:410)
        at android.text.StaticLayout.<init>(StaticLayout.java:140)
        at android.widget.TextView.makeSingleLayout(TextView.java:6068)
        at android.widget.TextView.makeNewLayout(TextView.java:5925)
        at android.widget.TextView.onMeasure(TextView.java:6282)
        at android.view.View.measure(View.java:15635)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4919)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1411)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:698)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
        at android.view.View.measure(View.java:15635)
        at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:681)
        at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:461)
        at android.view.View.measure(View.java:15635)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4919)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
        at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135)
        at android.view.View.measure(View.java:15635)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4919)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1411)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:698)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
        at android.view.View.measure(View.java:15635)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4919)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
        at android.view.View.measure(View.java:15635)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4919)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1411)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:698)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
        at android.view.View.measure(View.java:15635)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4919)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
        at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2200)
        at android.view.View.measure(View.java:15635)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2165)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1249)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1443)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1139)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4872)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:776)
        at android.view.Choreographer.doCallbacks(Choreographer.java:579)
        at android.view.Choreographer.doFrame(Choreographer.java:548)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:762)
        at android.os.Handler.handleCallback(Handler.java:800)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:194)
        at android.app.ActivityThread.main(ActivityThread.java:5371)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:525)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
        at dalvik.system.NativeStart.main(Native Method)

这是一些我没有得到异常的场景

1. 如果我删除最后一个字符（设置文本“123456 123 123456789012345”从最后一个字符中删除了“6”），那么我不会得到异常
2. 如果我设置 textSize 14sp 那么我不会得到任何异常
3. 如果我设置了 ellipsize="end" 效果很好。
4. 它在具有相同 TextView 属性的高分辨率设备中运行良好。

我认为用大的最后一个单词“1234567890123456”（16 个字符）制作 ellipsize middle 会导致此异常。

这是我的设备规格：

1. 型号：华为Y320-U30
2. Android 版本：4.2.2

任何人都可以在这种情况下解释calculateEllipsis() 方法有什么问题吗？

提前致谢。

Answer 1

我得到了答案。如果我同时使用 android:ellipsize="middle" 和 android:maxLines="1" ，这是 pre lolipop 设备的错误。解决方案是使用android:singleLine="true"。这可以防止我的崩溃。这是bug report。你也可以看看这个answer