我跟着This在Android应用程序中创建地图,但我不知道为什么,但是当我启动应用程序时,我看不到地图,这正是我得到的: 检查图片Image1
就像我说的那样,我完全按照教程,但以防万一...这是我的代码:
MainActivity.java:
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
MainActivity.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"/>
清单文件(xml):
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.Poox2.andtestmap4"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="12"
android:targetSdkVersion="16" />
<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"/>
<!-- The following two permissions are not required to use
Google Maps Android API v2, but are recommended. -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-feature
android:glEsVersion="0x00020000"
android:required="true"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<activity
android:name="com.Poox2.andtestmap4.MainActivity"
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.maps.v2.API_KEY"
android:value="AIzaSyDmVLuYyZce...-Rest of the API key -"/>
</application>
</manifest>
到目前为止,谢谢你的答案,但它仍然无效
答案 0 :(得分:0)
更改此
public class MainActivity extends FragmentActivity {
到
public class MainActivity extends Activity {
确保您已在google api控制台中为Android启用了地图。确保清单中的api密钥正确。确保您在Android地图项目中引用了Google Play服务库项目。
最好在真实设备上进行测试。
答案 1 :(得分:0)
尝试通过转到Google API console生成api密钥,甚至尝试添加Google Play服务库..
Select Window > Android SDK Manager or run android at the command line.
Scroll to the bottom of the package list and select Extras > Google Play services. The Google Play services SDK is downloaded to your computer and installed in your Android SDK environment at <android-sdk-folder>/extras/google/google_play_services/
Add the Google Play Services project into your Eclipse workspace.
Click File -> Import..., select Android -> Existing Android Code into Workspace
Browse to and select <android-sdk-folder>/extras/google/google_play_services/libproject/google-play-services_lib
To add the dependency to Google Play Services into your project
Project -> Properties -> Android -> Library, Add -> google-play-services_lib
答案 2 :(得分:0)
我遇到了地图显示问题,结果发现我的解决方案是在设备上卸载并重新安装应用程序(而不仅仅是安装在它上面)。我找不到帮助我的SO,但它看起来像API密钥或其他东西被缓存在设备上。
答案 3 :(得分:0)
好的,所以我发现了问题,就是使用Google控制台中的包名...当我生成API密钥时,SHA1密钥是正确的,当我添加包名称时,名称错误了为什么地图没有出现。非常感谢你的帮助,我真的很感激它:)。
答案 4 :(得分:0)
您必须使用片段活动
public class Map extends FragmentActivity {
GoogleMap map;
double lati;
double long;
boolean flag = false;
// private LocationManager lm;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mapptry);
map = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map)).getMap();
}
}
地图的XML就在这里
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="wrap_content"
android:layout_height="match_parent" />
也这样做
import android.support.v4.app.FragmentActivity;
在您执行此操作之前右键单击project-&gt; properties-&gt; buildpath-&gt; java build path - &gt;库..然后点击添加外部罐子 然后添加所需的jar
如果API密钥错误,那么它也只显示白屏