Google 地图 API 级别 2 - 示例代码 - Android Studio

Question

我正在尝试运行示例 Google 地图 Android API v2 在 Android Studio 中的这个 page 上找到。

我的问题是为什么我得到下面 logcat 中显示的 android.view.InflateException: Binary XML file line #2: Error inflating class fragment？

环境： IDE: Android Studio 1.0.1 设备：Galaxy Nexus，Android 版本 4.2.1

我查看了相关问题并尝试了建议的解决方案，但没有任何效果。

大多数其他问题都使用 FragmentActivity 并且需要 SupportMapFragment 但我使用的是常规 Activity 和 MapFragment，如示例中所示网页。我使用的最低 API 级别为 15，所以我认为 FragmentActivity 和 SupportMapFragment 没有必要。

我直接从网上复制了示例代码page。

来自 logcat 的错误。（只包括第一位。）

02-12 19:59:49.496  23891-23891/edu.utexas.scottm.googlemapsapi_2_demo E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{edu.utexas.scottm.googlemapsapi_2_demo/edu.utexas.scottm.googlemapsapi_2_demo.SimpleMapActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)

布局文件activity_simple_map.xml（从引用的网页复制）

<?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"/>

Activity（复制自引用的网页）

package edu.utexas.scottm.googlemapsapi_2_demo;

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


public class SimpleMapActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_simple_map);
    }
}

清单文件（删除了我的 MAPS API 密钥。）

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="edu.utexas.scottm.googlemapsapi_2_demo" >

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true"/>

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

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

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <meta-data
            android:name="com.google.android.maps.v2.MY_API_KEY"
            android:value="MY_API_KEY"/>
    </application>

</manifest>

模块的 build.gradle 文件：app

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "edu.utexas.scottm.googlemapsapi_2_demo"
        minSdkVersion 15
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile 'com.google.android.gms:play-services:6.5.87'
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'
}

我已经从 \android-sdk\extras\google\google_play_services\samples\maps 中的 Google Play 服务示例应用程序创建了一个 Android Studio 项目，它可以在设备上运行，但是它使用 FragmentActivity和 SupportMapFragment。

如有任何帮助，我们将不胜感激。

整个 logcat 以备不时之需：

02-12 19:59:49.496  23891-23891/edu.utexas.scottm.googlemapsapi_2_demo E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{edu.utexas.scottm.googlemapsapi_2_demo/edu.utexas.scottm.googlemapsapi_2_demo.SimpleMapActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
            at android.app.ActivityThread.access0(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5039)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
            at android.app.Activity.setContentView(Activity.java:1881)
            at edu.utexas.scottm.googlemapsapi_2_demo.SimpleMapActivity.onCreate(SimpleMapActivity.java:12)
            at android.app.Activity.performCreate(Activity.java:5104)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
            at android.app.ActivityThread.access0(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5039)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.RuntimeException: API key not found.  Check that <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="your API key"/> is in the <application> element of AndroidManifest.xml
            at com.google.maps.api.android.lib6.gmm6.c.g.a(Unknown Source)
            at com.google.maps.api.android.lib6.c.i.a(Unknown Source)
            at com.google.maps.api.android.lib6.c.el.a(Unknown Source)
            at com.google.maps.api.android.lib6.c.ab.a(Unknown Source)
            at com.google.maps.api.android.lib6.c.aa.a(Unknown Source)
            at com.google.android.gms.maps.internal.x.onTransact(SourceFile:107)
            at android.os.Binder.transact(Binder.java:310)
            at com.google.android.gms.maps.internal.IMapFragmentDelegate$a$a.onCreateView(Unknown Source)
            at com.google.android.gms.maps.MapFragment$a.onCreateView(Unknown Source)
            at com.google.android.gms.dynamic.a.b(Unknown Source)
            at com.google.android.gms.dynamic.a.a(Unknown Source)
            at com.google.android.gms.dynamic.a.onCreateView(Unknown Source)
            at com.google.android.gms.maps.MapFragment.onCreateView(Unknown Source)
            at android.app.Fragment.performCreateView(Fragment.java:1695)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:861)
            at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
            at android.app.FragmentManagerImpl.addFragment(FragmentManager.java:1137)
            at android.app.Activity.onCreateView(Activity.java:4717)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
            at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
            at android.app.Activity.setContentView(Activity.java:1881)
            at edu.utexas.scottm.googlemapsapi_2_demo.SimpleMapActivity.onCreate(SimpleMapActivity.java:12)
            at android.app.Activity.performCreate(Activity.java:5104)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
            at android.app.ActivityThread.access0(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5039)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
            at dalvik.system.NativeStart.main(Native Method)

Answer 1

我不确定我是否可以帮助解决这个错误，但是这个 link 似乎符合您的需要。我最近将它用于我创建的应用程序，它很好地解释了一切。它使用来自 Activity 的片段。希望对您有所帮助！

http://www.vogella.com/tutorials/AndroidGoogleMaps/article.html

Answer 2

仔细查看 logcat 发现：

 Caused by: java.lang.RuntimeException: API key not found.  Check that <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="your API key"/> is in the <application> element of AndroidManifest.xml

问题出在清单中。

<meta-data
    android:name="com.google.android.maps.v2.MY_API_KEY"
    android:value="MY_API_KEY"/>

我将 API 键放在 com.google.android.maps.v2. 的末尾，而不是将其保留为

 android:name="com.google.android.maps.v2.API_KEY"

没有仔细阅读网页上的说明。他们明确指出：

用 API 键替换值属性中的 API_KEY。

多哈

Answer 3

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

使用片段Activity代替Activity

public class SimpleMapActivity extends FragmentActivity {

GoogleMap map;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_simple_map);
        map =((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.iqamah_map)).getMap();

    }
}

Answer 4

您的 logcat 建议的代码中存在三个问题：

首先获取您的API_KEY。按照此 link 获取您的 API_KEY。将其替换为 manifest.xml 文件中的 android:value="MY_API_KEY"。

将您的 java 文件更改为：

public class SimpleMapActivity extends FragmentActivity {

GoogleMap map;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_simple_map);
    map =((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.iqamah_map)).getMap();
 }
}

将您的 .xml 文件更改为：

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

希望对您有所帮助！！

Google 地图 API 级别 2 - 示例代码 - Android Studio

Google Maps API Level 2 - Sample Code - Android Studio

android

google-maps

android-studio