原因：android.view.InflateException:二进制XML文件行#18:膨胀类片段时出错

我即将创建一个片段移动版，目前正在尝试让MapsAPIv2正常工作。到目前为止，地图显示在应用程序中，但是我不能使用代码中包含的其他功能（例如缩放）

如果我把注释去掉，代码效果会很好：

map=（（SupportMapFragment）getFragmentManager（）.findFragmentById（R.id.maps））.getMap（）

MapsFragment

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import android.support.v4.app.Fragment;

public class MapsFragment extends Fragment{

    //Skapar en variabel för position
    private final LatLng LOCATION_GOOGLE = new LatLng(40.7406578, -74.0020894);
    //Skapar objekt
    private GoogleMap map;


    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        View view = inflater.inflate(R.layout.maps, container, false); 

        map = ((SupportMapFragment)getFragmentManager().findFragmentById(R.id.maps)).getMap();

        //Bestämmer närhet på kameran
        CameraUpdate update = CameraUpdateFactory.newLatLngZoom(LOCATION_GOOGLE, 14);
        //Uppdaterar "kameran"
        map.animateCamera(update);
        //Sätter maptyp (Satellite-view)
        map.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
        //Sätter markering med en liten titel 
        map.addMarker(new MarkerOptions().position(LOCATION_GOOGLE).title("Google Inc"));

        return view;
    }
}

maps.xml

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

---

您的类扩展了

FragmentActivity

你有

map = ((SupportMapFragment)getFragmentManager().findFragmentById(R.id.maps)).getMap();

改变这个

 android:name="com.google.android.gms.maps.MapFragment"/>

到

---

尝试向MapsFragment添加一些构造函数，它将起作用

public MapsFragment(Context ctx, AttributeSet attrs, int def) {
    super(ctx, attrs, def);
}

public MapsFragment(Context ctx, AttributeSet attrs) {
    this(ctx, attrs, 0);
}

public MapsFragment(Context ctx) {
    this(ctx, null, 0);
}

---

你能把清单文件贴到网上吗？这个问题的答案有什么帮助吗？这是完全错误的。fragment不应该有arg constructorI get“类型MapsFragment的方法getSupportFragmentManager（）未定义”@user2734182如果使用

getFragmentManager（）

，会发生什么情况。当我使用getFragmentManager运行它时，我得到错误“由以下原因引起：java.lang.ClassCastException:com.raj.fragment.MapsFragment无法转换为com.google.android.gms.maps.SupportMapFragment”@user2734182您是否做了我报告中提到的更改post@user2734182使用

getActivity（）.getSupportFragmentManager（）
01-02 13:28:25.657: E/AndroidRuntime(31071): FATAL EXCEPTION: main
01-02 13:28:25.657: E/AndroidRuntime(31071): Process: com.raj.fragment, PID: 31071
01-02 13:28:25.657: E/AndroidRuntime(31071): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.raj.fragment/com.raj.fragment.MainActivity}: android.view.InflateException: Binary XML file line #18: Error inflating class fragment
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2198)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2248)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.app.ActivityThread.access$800(ActivityThread.java:138)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1199)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.os.Handler.dispatchMessage(Handler.java:102)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.os.Looper.loop(Looper.java:136)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.app.ActivityThread.main(ActivityThread.java:5050)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at java.lang.reflect.Method.invokeNative(Native Method)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at java.lang.reflect.Method.invoke(Method.java:515)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1264)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1080)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at dalvik.system.NativeStart.main(Native Method)
01-02 13:28:25.657: E/AndroidRuntime(31071): Caused by: android.view.InflateException: Binary XML file line #18: Error inflating class fragment
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:290)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.app.Activity.setContentView(Activity.java:1929)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at com.raj.fragment.MainActivity.onCreate(MainActivity.java:13)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.app.Activity.performCreate(Activity.java:5231)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2162)
01-02 13:28:25.657: E/AndroidRuntime(31071):    ... 11 more
01-02 13:28:25.657: E/AndroidRuntime(31071): Caused by: java.lang.ClassCastException: com.raj.fragment.MapsFragment cannot be cast to com.google.android.gms.maps.SupportMapFragment
01-02 13:28:25.657: E/AndroidRuntime(31071):    at com.raj.fragment.MapsFragment.onCreateView(MapsFragment.java:29)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.support.v4.app.Fragment.performCreateView(Fragment.java:1500)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:900)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1082)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1184)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:291)
01-02 13:28:25.657: E/AndroidRuntime(31071):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685)
01-02 13:28:25.657: E/AndroidRuntime(31071):    ... 21 more

map = ((SupportMapFragment)getFragmentManager().findFragmentById(R.id.maps)).getMap();

 android:name="com.google.android.gms.maps.MapFragment"/>

android:name="com.google.android.gms.maps.SupportMapFragment"/>

public MapsFragment(Context ctx, AttributeSet attrs, int def) {
    super(ctx, attrs, def);
}

public MapsFragment(Context ctx, AttributeSet attrs) {
    this(ctx, attrs, 0);
}

public MapsFragment(Context ctx) {
    this(ctx, null, 0);
}