android.view.InflateException：二进制XML文件第0行：二进制XML文件第0行：膨胀类片段时出错

Question

您好stackoverflow社区，我整个星期都面临着一个小问题。 我试图从我的主要活动中启动地图活动，并在调用地图活动后收到此错误：

E/AndroidRuntime: FATAL EXCEPTION: main
              Process: eu.tinysolutions.tinytracker, PID: 12795
              java.lang.RuntimeException: Unable to start activity ComponentInfo{eu.tinysolutions.tinytracker/eu.tinysolutions.tinytracker.MapsActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class fragment
                  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2572)
                  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2654)
                  at android.app.ActivityThread.-wrap11(ActivityThread.java)
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1488)
                  at android.os.Handler.dispatchMessage(Handler.java:111)
                  at android.os.Looper.loop(Looper.java:207)
                  at android.app.ActivityThread.main(ActivityThread.java:5728)
                  at java.lang.reflect.Method.invoke(Native Method)
                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
               Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class fragment
                  at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
                  at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
                  at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
                  at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:412)
                  at android.app.Activity.setContentView(Activity.java:2191)
                  at eu.tinysolutions.tinytracker.MapsActivity.onCreate(MapsActivity.java:20)
                  at android.app.Activity.performCreate(Activity.java:6309)
                  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1113)
                  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2519)
                  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2654) 
                  at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1488) 
                  at android.os.Handler.dispatchMessage(Handler.java:111) 
                  at android.os.Looper.loop(Looper.java:207) 
                  at android.app.ActivityThread.main(ActivityThread.java:5728) 
                  at java.lang.reflect.Method.invoke(Native Method) 
                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679) 
               Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class fragment
                  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:782)
                  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
                  at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
                  at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
                  at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
                  at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:412) 
                  at android.app.Activity.setContentView(Activity.java:2191) 
                  at eu.tinysolutions.tinytracker.MapsActivity.onCreate(MapsActivity.java:20) 
                  at android.app.Activity.performCreate(Activity.java:6309) 
                  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1113) 
                  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2519) 
                  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2654) 
                  at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1488) 
                  at android.os.Handler.dispatchMessage(Handler.java:111) 
                  at android.os.Looper.loop(Looper.java:207) 
                  at android.app.ActivityThread.main(ActivityThread.java:5728) 
                  at java.lang.reflect.Method.invoke(Native Method) 
                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679) 
               Caused by: java.lang.RuntimeException: API key not found.  Check that <meta-data android:name="com.google.android.geo.API_KEY" android:value="your API key"/> is in the <application> element of AndroidManifest.xml
                  at com.google.maps.api.android.lib6.drd.q.b(:com.google.android.gms.dynamite_dynamitemodulesb@12673019@12.6.73 (040300-194189626):40)
                  at com.google.maps.api.android.lib6.auth.e.a(:com.google.android.gms.dynamite_dynamitemodulesb@12673019@12.6.73 (040300-194189626):11)
                  at com.google.maps.api.android.lib6.impl.e.a(:com.google.android.gms.dynamite_dynamitemodulesb@12673019@12.6.73 (040300-194189626):4)
                  at com.google.android.gms.maps.internal.b.a(:com.google.android.gms.dynamite_dynamitemodulesb@12673019@12.6.73 (040300-194189626):24)
                  at com.google.android.gms.maps.internal.CreatorImpl.a(:com.google.android.gms.dynamite_dynamitemodulesb@12673019@12.6.73 (040300-194189626):69)
                  at com.google.android.gms.maps.internal.CreatorImpl.newMapFragmentDelegate(:com.google.android.gms.dynamite_dynamitemodulesb@12673019@12.6.73 (040300-194189626):32)
                  at com.google.android.gms.maps.internal.i.onTransact(:com.google.android.gms.dynamite_dynamitemodulesb@12673019@12.6.73 (040300-194189626):31)
                  at android.os.Binder.transact(Binder.java:392)
                  at com.google.android.gms.internal.maps.zza.transactAndReadException(Unknown Source)
                  at com.google.android.gms.maps.internal.zzf.zzc(Unknown Source)
                  at com.google.android.gms.maps.SupportMapFragment$zzb.zzc(Unknown Source)
                  at com.google.android.gms.maps.SupportMapFragment$zzb.createDelegate(Unknown Source)
                  at com.google.android.gms.dynamic.DeferredLifecycleHelper.zza(Unknown Source)
                  at com.google.android.gms.dynamic.DeferredLifecycleHelper.onInflate(Unknown Source)
                  at com.google.android.gms.maps.SupportMapFragment.onInflate(Unknown Source)
                  at android.support.v4.app.Fragment.onInflate(Fragment.java:1306)
                  at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:3672)
                at android.support.v4.app.

MainActivity代码：

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mapInit();
}
public void mapInit(){
    startActivity(new Intent(this, MapsActivity.class));

}

MapsAcitivity只是Google Studio活动的默认Android Studio：

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

  private GoogleMap mMap;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_maps);
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
  }

我发现该应用程序在MapsActivity setContentView行上刹车

PS我已将API密钥添加到清单文件

更新

抱歉，我忘记添加布局文件

这是activity_maps布局文件：

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MapsActivity" />

Answer 1

它在日志中

Caused by: java.lang.RuntimeException: API key not found. Check that <meta-data android:name="com.google.android.geo.API_KEY" android:value="your API key"/> is in the <application> element of AndroidManifest.xml

在清单文件中添加您的API密钥

例如

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">
    .
    .
    <application
          .  
          <meta-data
                 android:name="com.google.android.geo.API_KEY"
                 android:value="YOUR API KEY HERE" />
    </application>
</manifest>

Answer 2

问题是，因为您使用的是没有容器视图的片段。

您可以从构建灵活的用户界面文档中了解有关此内容的信息 ：

处理片段时（尤其是在运行时添加片段时）的一个重要规则是，您的活动布局必须包含一个容器View，您可以在其中插入片段。

从这个Fragment文档中 ：

当您将片段添加为活动布局的一部分时，它位于活动视图层次结构内的ViewGroup中 ，并且该片段定义了自己的视图布局。 您可以通过在活动的布局文件中将该片段声明为元素来将其插入到活动布局中，或者通过将其添加到现有ViewGroup中来从应用程序代码中插入该片段

因此，通过将activity_maps布局更改为如下所示，将根布局添加到xml中：

<?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=".MapsActivity" >

      <fragment
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.google.android.gms.maps.SupportMapFragment"/>

</RelativeLayout>

记住要使用class而不是android:name属性。