第 7 行的 InflateException 二进制 XML 文件：膨胀类片段时出错

Posted 2023-04-18

【中文标题】第 7 行的 InflateException 二进制 XML 文件：膨胀类片段时出错

【英文标题】：InflateException Binary XML file at line #7: Error inflating class fragment

【发布时间】：2014-07-05 17:37:33

【问题描述】：

我一直在对这个问题进行一些研究，但还没有适合我的解决方案。我在片段类中添加了空构造函数并尝试了不同的片段导入，但似乎没有任何效果。希望大家帮帮我！

我的活动：

package com.example.com.example.android.rssfeed;

import android.app.Activity;
import android.os.Bundle;

public class RssfeedActivity extends Activity implements MyListFragment.OnItemSelectedListener 

@Override
protected void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_rssfeed);


public void onRssItemSelected(String link) 
    DetailFragment fragment = (DetailFragment) getFragmentManager().findFragmentById(R.id.detailFragment);

    if (fragment != null && fragment.isInLayout()) 
        fragment.setText(link);
    //end if
//end method onRssItemSelected

//end class

我的片段：

package com.example.com.example.android.rssfeed;
import android.app.Activity;
import android.os.Bundle;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;


public class MyListFragment extends Fragment 

public MyListFragment() 



private OnItemSelectedListener listener;


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    View view = inflater.inflate(R.layout.fragment_rsslist_overview, container, false);
    Button button = (Button) view.findViewById(R.id.btn1);
    button.setOnClickListener(new View.OnClickListener() 

        @Override
        public void onClick(View v) 
            updateDetail();
        //end onClick
    );
    return view;
//end onCreateView

public interface OnItemSelectedListener 
    public void onRssItemSelected(String link);
//end onItemSelectedListener

@Override
    public void onAttach(Activity activity) 
    super.onAttach(activity);

        if (activity instanceof OnItemSelectedListener) 
            listener = (OnItemSelectedListener) activity;

         else 
            throw new ClassCastException(activity.toString()
                    + "Must implement MyListFragment.OnItemSelectedListener");
        //end else

//end onAttach

//May also be triggered from the activity
public void updateDetail() 
    //Create fake data
    String newTime = String.valueOf(System.currentTimeMillis());
    // Send data to Activity
    listener.onRssItemSelected(newTime);
//end method updateDetail
//end class

我的片段 XML：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:baselineAligned="false"
android:layout_
android:layout_
android:orientation="horizontal" >

    <fragment
        android:id="@+id/listFragment" 
        android:layout_
        android:layout_weight="1"
        android:layout_
        class="com.example.android.rssfeed.MyListFragment"
        android:layout_marginTop="?android:attr/actionBarSize"></fragment>



    <fragment
        android:id="@+id/detailFragment"
        android:layout_
        android:layout_weight="2"
        android:layout_
        class="com.example.android.rssfeed.DetailFragment"></fragment>




</LinearLayout>

清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.com.example.android.rssfeed"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
    android:minSdkVersion="12"
    android:targetSdkVersion="19" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.com.example.android.rssfeed.RssfeedActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

按钮 XML：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical" >

<button
    android:id="@+id/btn1"
    android:layout_
    android:layout_
    android:text="Press to Update">

</button>
</LinearLayout>

LogCat 错误：

05-17 10:35:01.864: E/AndroidRuntime(6384): FATAL EXCEPTION: main
05-17 10:35:01.864: E/AndroidRuntime(6384): java.lang.RuntimeException: Unable to start activity ComponentInfocom.example.com.example.android.rssfeed/com.example.com.example.android.rssfeed.RssfeedActivity: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2245)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2295)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.ActivityThread.access$700(ActivityThread.java:150)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at  android.app.ActivityThread$H.handleMessage(ActivityThread.java:1280)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.os.Looper.loop(Looper.java:137)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.ActivityThread.main(ActivityThread.java:5279)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at java.lang.reflect.Method.invokeNative(Native Method)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at java.lang.reflect.Method.invoke(Method.java:511)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at dalvik.system.NativeStart.main(Native Method)
05-17 10:35:01.864: E/AndroidRuntime(6384): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:710)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:752)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.view.LayoutInflater.inflate(LayoutInflater.java:495)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:342)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.Activity.setContentView(Activity.java:1928)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at com.example.com.example.android.rssfeed.RssfeedActivity.onCreate(RssfeedActivity.java:11)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.Activity.performCreate(Activity.java:5267)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1097)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2209)
05-17 10:35:01.864: E/AndroidRuntime(6384):     ... 11 more
05-17 10:35:01.864: E/AndroidRuntime(6384): Caused by: android.app.Fragment$InstantiationException: Unable to instantiate fragment com.example.android.rssfeed.MyListFragment: make sure class name exists, is public, and has an empty constructor that is public
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.Fragment.instantiate(Fragment.java:592)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.Fragment.instantiate(Fragment.java:560)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.Activity.onCreateView(Activity.java:4862)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:686)
05-17 10:35:01.864: E/AndroidRuntime(6384):     ... 21 more
05-17 10:35:01.864: E/AndroidRuntime(6384): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.android.rssfeed.MyListFragment" on path: /data/app/com.example.com.example.android.rssfeed-1.apk
05-17 10:35:01.864: E/AndroidRuntime(6384):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
05-17 10:35:01.864: E/AndroidRuntime(6384):     at android.app.Fragment.instantiate(Fragment.java:582)
05-17 10:35:01.864: E/AndroidRuntime(6384):     ... 24 more

【参考方案1】：

原因：java.lang.ClassNotFoundException：找不到类 路径上的“com.example.android.rssfeed.MyListFragment”： /data/app/com.example.com.example.android.rssfeed-1.apk

改变这个

 class="com.example.android.rssfeed.MyListFragment"

到

 class="com.example.com.example.android.rssfeed.MyListFragment"

因为包名是package com.example.com.example.android.rssfeed。

同样

 class="com.example.com.example.android.rssfeed.DetailFragment"

如果包名相同

改变这个

<button
android:id="@+id/btn1"
android:layout_
android:layout_
android:text="Press to Update">

到

<Button
android:id="@+id/btn1"
android:layout_
android:layout_
android:text="Press to Update" />

【讨论】：

啊，谢谢你指出这一点，就在我的头上，哈哈。现在它给了我：错误膨胀类按钮，而不是。我还需要向它添加一个类包吗？

@user3572555 不，你没有

啊好吧，我把按钮的xml添加到了粘贴中。

@user3572555 它的 <Button 不是 <button。已编辑

啊！如此愚蠢的菜鸟错误，我想我现在需要我的咖啡了。感谢您的帮助！

【参考方案2】：

改变

"class= com.example.android.rssfeed.MyListFragment" 

到

"com.example.com.example.android.rssfeed.MyListFragment"


 And your problem will be solved out 

【参考方案3】：

在片段中添加这一行 class="com.google.android.gms.maps.SupportMapFragment"