相关疑难解决方法(0)

我正在测试适用于Android的新Google Maps API V2,并在应用启动时收到此消息:

这是在4.1模拟器上运行.

这是我的AndroidManifest.xml档案:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.maptest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <permission
        android:name="com.example.maptest.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>
    <uses-permission android:name="com.example.maptest.permission.MAPS_RECEIVE"/>
    <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="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

    <!-- Require OpenGL ES version 2 -->
    <uses-feature
          android:glEsVersion="0x00020000"
          android:required="true"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <activity
            android:name=".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>
        </activity>

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

    </application>
</manifest>

文件MainActivity.java:

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); …

我的步骤:

• 从debug.keystore获取SHA1代码
• 在谷歌apis控制台中创建应用程序
• 启用了谷歌地图api v2
• 输入SHA1; my.package.name
• 获取API密钥

• 创建AndroidManifest文件:

      <permission
              android:name="my.package.name.permission.MAPS_RECEIVE"
              android:protectionLevel="signature"/>
  
      <uses-permission android:name="my.package.name.permission.MAPS_RECEIVE"/>
  
      <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="15"/>
  
      <uses-permission android:name="android.permission.INTERNET"/>
      <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"/>
      <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
  
      <uses-feature android:glEsVersion="0x00020000" android:required="true"/>
  
      <application android:label="@string/app_name" android:icon="@drawable/ic_launcher" android:hardwareAccelerated="true">
  
          <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="MY_API_KEY_HERE" />
  
          <activity android:name="MyActivity"
                    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>
  </manifest>
  

  Run Code Online (Sandbox Code Playgroud)

• 创建布局

• 把"google-play-services.jar"放到libs上

编译后我崩溃了:

  ERROR/AndroidRuntime(10182): FATAL EXCEPTION: main
                java.lang.NoClassDefFoundError: com.google.android.gms.R$styleable
                at com.google.android.gms.maps.GoogleMapOptions.createFromAttributes(Unknown Source)
                at com.google.android.gms.maps.MapFragment.onInflate(Unknown Source)
                at android.app.Activity.onCreateView(Activity.java:4716)
                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) …

我想在片段内添加自定义布局的地图.

1. 我可以使用将添加SupportMapFragment的ChildFragmentManager来实现.这种方法目前正在使用.但它有缺点,因为子片段事务是异步的,很难保证getMap不会返回null.
2. 另一种方法是从super扩展SupportMapFragment存储mapView onCreateView

   mapView = super.onCreateView(inflater, container, savedInstanceState);

   并将其插入到膨胀的布局中.主要问题是,然后片段尝试从保存状态恢复谷歌地图SDK内部粉碎.

有没有其他方法可以解决这个问题.如果谷歌地图团队的某个人会推荐正确的方法会很好,因为你没有在样本中加入这样的东西.

我无法得到地图!我能得到的只是空的.

这是代码.

       public class MainActivity extends FragmentActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        SupportMapFragment fragment = new SupportMapFragment();
        getSupportFragmentManager().beginTransaction()
                .add(android.R.id.content, fragment).commit();


       GoogleMap map;
        map = fragment.getMap();
             //here i cant access this snippet because map = null 
        if(map!=null){
        UiSettings mm = map.getUiSettings();
        map.setMyLocationEnabled(true);
          } }
           }

清单:

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

    <uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />
    <uses-feature
    android:glEsVersion="0x00020000"
     android:required="true"/>

   <permission
    android:name="com.example.anywhere_reminder.permission.MAPS_RECEIVE"
    android:protectionLevel="signature" />

 <uses-permission android:name="com.example.anywhere_reminder.permission.MAPS_RECEIVE" />
 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> …

当我在Android Lollipop中启动它时,我在我的应用程序中发现了一个错误.Logcat说:

java.lang.NullPointerException: 

Attempt to invoke virtual method 'com.google.android.gms.maps.GoogleMap.
com.google.android.gms.maps.MapFragment.getMap()' on a null object reference

该错误只在运行Android Lollipop所示,确切的 相同应用程序是没有问题的,在其他设备上运行*.

这是代码:

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

    <LinearLayout
        android:id="@+id/map_side_holder"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/BlueGreyL3"
        android:orientation="horizontal"
        android:weightSum="100">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/map_margin_left_24dp"
            android:layout_marginStart="@dimen/map_margin_left_24dp"
            android:layout_weight="8"
            android:orientation="vertical">

            <!-- MAP -->
            <fragment
                android:id="@+id/location_map"
                class="com.google.android.gms.maps.MapFragment"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"/>

        </LinearLayout>

    </LinearLayout>

    <!-- Ads -->
    <LinearLayout
        android:id="@+id/linlay_wrb"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical">
    </LinearLayout>

</RelativeLayout>

谷歌地图v2片段LocationFragments.java通过调用加载到我的班级

// View 
try {
    mView = inflater.inflate(R.layout.location_fragment, container, false);
    sMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.location_map)).getMap();
    mSideHolder …