在Android中添加工具栏时出现InflateException [英] InflateException when adding toolbar in android
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问题描述
我是材料设计的新手，我正在尝试一些方法.对于我的应用程序，最低sdk是21.但是我的应用程序崩溃，并显示以下代码.
I am new to material design and i am trying a few things out. For my app minimum sdk is 21. But my app crashes with the following code.
工具栏的代码为
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:background="@color/colorPrimary"
android:elevation="5dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
</android.support.v7.widget.Toolbar>
</LinearLayout>
主要活动的代码
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context="com.example.sagar.moviesuccesspredictor.MainActivity">
<include
android:id="@+id/tool_bar"
android:layout="@layout/tool_bar"
tools:layout_editor_absoluteY="45dp"
tools:layout_editor_absoluteX="0dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:layout_below="@+id/tool_bar"
android:layout_marginTop="10dp"/>
</RelativeLayout>
我的Java代码是
public class MainActivity extends AppCompatActivity {
Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar=(android.support.v7.widget.Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
}
}
在Lolipop之前，我不需要任何向后兼容性.如果没有向后的支持，我也找不到任何教程.任何帮助对我来说都是很好的.
i do not need any backwards compatibility pre Lolipop. also i could not find any tutorial without the backward support. Any help will be great for me.
logcat是
Unable to start activity ComponentInfo{com.example.sagar.moviesuccesspredictor/com.example.sagar.moviesuccesspredictor.MainActivity}: android.view.InflateException:
Binary XML file line #9: You must specify a layout in the include tag: <include layout="@layout/layoutID"
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3320)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3416)
at android.app.ActivityThread.access$1100(ActivityThread.java:230)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1822)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7409)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: android.view.InflateException: Binary XML file line #9: You must specify a layout in the include tag: <include layout="@layout/layoutID" />
at android.view.LayoutInflater.inflate(LayoutInflater.java:551)
at android.view.LayoutInflater.inflate(LayoutInflater.java:429)
at android.view.LayoutInflater.inflate(LayoutInflater.java:380)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:292)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.sagar.moviesuccesspredictor.MainActivity.onCreate(MainActivity.java:16)
at android.app.Activity.performCreate(Activity.java:6904)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3267)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3416)
at android.app.ActivityThread.access$1100(ActivityThread.java:230)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1822)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7409)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: android.view.InflateException: You must specify a layout in the include tag: <include layout="@layout/layoutID" />
at android.view.LayoutInflater.parseInclude(LayoutInflater.java:923)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:843)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:810)
at android.view.LayoutInflater.inflate(LayoutInflater.java:527)
at android.view.LayoutInflater.inflate(LayoutInflater.java:429)
at android.view.LayoutInflater.inflate(LayoutInflater.java:380)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:292)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.sagar.moviesuccesspredictor.MainActivity.onCreate(MainActivity.java:16)
at android.app.Activity.performCreate(Activity.java:6904)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3267)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3416)
at android.app.ActivityThread.access$1100(ActivityThread.java:230)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1822)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7409)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
推荐答案
您的工具栏ID是 toolbar ，而不是 tool_bar .使用类似，
Your toolbar id is toolbar not tool_bar. Use like,
public class MainActivity extends AppCompatActivity {
Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar=(Toolbar) findViewById(R.id.toolbar);
}
}
使用工具栏的示例
toolbar.xml
toolbar.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorPrimary"
xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="@string/app_name"
android:textColor="#fff"
android:gravity="center"
android:textStyle="bold"
android:textSize="18dp"/>
</android.support.v7.widget.Toolbar>
main_activity.xml
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="@+id/this_toolbar"
layout="@layout/toolbar"/>
<TextView
android:id="@+id/toolbar_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/this_toolbar"
android:text="TextView"/>
</RelativeLayout>
MainActivity.java
MainActivity.java
public class MainActivity extends AppCompatActivity {
TextView m_toolbar_title;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
m_toolbar_title = (TextView)findViewById(R.id.toolbar_title);
m_toolbar_title.setText("Activity Title");
}
}
activity_main.xml 中的 layout ="@ layout/toolbar" ， toolbar 应该是具有<的文件名.工具栏>
看看.这可能会对您有所帮助.
Have a look. This may helps you.
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