1、报错提示
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplication/com.example.myapplication.MainActivity}: android.view.InflateException: Binary XML file line #9 in com.example.myapplication:layout/activity_main: Binary XML file line #9 in com.example.myapplication:layout/activity_main: Error inflating class fragment.
2、定位问题
查看日志发现问题定位于: at com.example.myapplication.MainActivity.onCreate(MainActivity.java:11),点击跳转到该代码行:
setContentView(R.layout.activity_main);
发现是xml文件的问题,于是仔细排查了我使用Fragment的一段代码块
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<fragment
android:name="com.example.myapplication.fragment.MyFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
发现是fragment没有使用布局id导致的问题,在我给fragment添加了id后,问题成功解决。
<fragment
android:id="@+id/my_fragment"
android:name="com.example.myapplication.fragment.MyFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
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