在这个应用程序中，我试图添加一个功能性的 V2 谷歌地图。我已经查看了大多数关于创建 Activity 、获取 map key 和创建 xml 文件的教程，以尝试查看我是否错过了任何步骤(我经历了 4 次)，但它没有好像我错过了任何一步。
Here是我使用的网站:
当我在手机上运行我的应用程序时(因为 Google Play 服务不能在模拟器上运行)，它给我以下两个错误:
02-11 22:10:54.690: E/AndroidRuntime(4526): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myfirstapp/com.example.myfirstapp.ShowActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
02-11 22:10:54.690: E/AndroidRuntime(4526):
Caused by: android.app.Fragment$InstantiationException: Unable to instantiate fragment com.google.android.gms.maps.MapFragment: make sure class name exists, is public, and has an empty constructor that is public
这是我的 Activity :
package com.example.myfirstapp;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import com.google.android.maps.*;
import com.google.android.gms.maps.MapFragment;
public class ShowActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_map, menu);
return true;
}
//@Override
//protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
//return false;
//}
}
抱歉格式化，但这是我的 xml 文件:
<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=".ShowActivity" >
<fragment
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment" />
</RelativeLayout>
我已经导入了 Google API 和 google play 服务，所以所有的导入都在工作，这让我想知道为什么第二个错误说 MapFragment 是空的。 list 文件代码:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myfirstapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.SUBSCRIBED_FEEDS_READ" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="com.example.myfirstapp.permission.MAPS_RECEIVE" />
<permission
android:name="com.example.myfirstapp.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.myfirstapp.MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<meta-data
android:name="android.app.default_searchable"
android:value=".SearchResultsActivity" />
</activity>
<activity
android:name="com.example.myfirstapp.SearchResultsActivity"
android:label="@string/title_activity_search_results"
android:launchMode="singleTop" >
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
<meta-data
android:name="android.app.searchable"
android:resource="@xml/searchable" />
</activity>
<activity
android:name="com.example.myfirstapp.AddContacts"
android:label="@string/title_activity_add_contacts" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.myfirstapp.ContactActivity"
android:label="@string/title_activity_contact" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.myfirstapp.DisplayInfo"
android:label="@string/title_activity_display_info" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:name="com.example.myfirstapp.SomeProvider"
android:authorities="com.example.myfirstapp.SomeProvider" >
</provider>
<activity
android:name="com.example.myfirstapp.EditContacts"
android:label="@string/title_activity_edit_contacts" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.myfirstapp.DeleteContact"
android:label="@string/title_activity_delete_contact" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.myfirstapp.FlightInfo"
android:label="@string/title_activity_flight_info" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.myfirstapp.EventInfo"
android:label="@string/title_activity_event_info" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.myfirstapp.ContactsActivity"
android:label="@string/title_activity_contacts" >
</activity>
<activity
android:name="com.example.myfirstapp.ShowActivity"
android:label="@string/title_activity_map" >
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="removed" />
<uses-library android:name="com.google.android.maps" />
</application>
</manifest>
最佳答案
试试下面的代码:
public class ShowActivity extends android.support.v4.app.FragmentActivity {
private GoogleMap mMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map);
setUpMapIfNeeded();
}
@Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
}
XML文件代码:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
list 文件代码:
<permission
android:name="com.example.myfirstapp.permission.MAPS_RECEIVE"
android:protectionLevel="signature"/>
<uses-permission android:name="com.example.myfirstapp.permission.MAPS_RECEIVE"/>
<!-- Copied from Google Maps Library/AndroidManifest.xml. -->
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<!-- External storage for caching. -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="removed" />
</application>
关于android - 二进制 XML 文件行 #8 : Error inflating class fragment, Google map ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14825331/