Android Studio报错: This item may not have a label readable by screen readers

Android Studio报错: This item may not have a label readable by screen readers

报错信息:

Solution:

//1. 在LinearLayout 中添加代码
xmlns:tools="http://schemas.android.com/tools"
//2. 在Button中添加代码
tools:ignore="TouchTargetSizeCheck,SpeakableTextPresentCheck"    

<LinearLayout 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:background="#EEEEEE"
    android:orientation="vertical"
    android:padding="5dp"
    tools:context=".CalculatorActivity">

<Button
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/background"
    tools:ignore="TouchTargetSizeCheck,SpeakableTextPresentCheck">
</Button>

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