Java Android上的简单地图应用程序(谷歌api v2)。不起作用。错误
我试图在Android上编写一个简单的地图应用程序,但唯一的结果是错误。我试着按它应该的方式编程,但仍然不起作用 main活动Java Android上的简单地图应用程序(谷歌api v2)。不起作用。错误,java,android,google-maps,Java,Android,Google Maps,我试图在Android上编写一个简单的地图应用程序,但唯一的结果是错误。我试着按它应该的方式编程,但仍然不起作用 main活动 package com.example.guidebook; import android.os.Bundle; import android.app.Activity; import android.view.Menu; public class GuidebookActivity extends Activity { @Override pr
package com.example.guidebook;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class GuidebookActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.guidebook);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.guidebook, menu);
return true;
}
}
.xml
<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=".MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="@string/hello_world" />
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment"/>
</RelativeLayout>
在布局XML中尝试使用
<com.google.android.gms.maps.MapView
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</com.google.android.gms.maps.MapView>
而是这个
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment"/>
并在您的项目上导入google play服务 您需要使用FragmentActivity而不是Activity来扩展 在xml文件中,将此
class=“com.google.android.gms.maps.MapFragment”更改为android:name=“com.google.android.gms.maps.SupportMapFragment”
将您的活动扩展到零碎的活动和更改
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)) .getMap(); to
map= ((SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map)).getMap();
另外,如果(map==null){map=((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map)).getMap();},请检查
检查您的清单文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.googlemapsv2"
android:versionCode="1"
android:versionName="1.0" >
<permission
android:name="com.example.googlemapsv2.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.googlemapsv2.permission.MAPS_RECEIVE" />
<uses-sdk
android:minSdkVersion="12"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<!-- Requires OpenGL ES version 2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name="com.example.googlemapsv2.MainActivity"
android:label="@string/app_name"
android:theme="@style/AppBaseTheme" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Google API Key -->
<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.API_KEY"
android:value="your Google map API key" />
</application>
希望这有帮助。这句话帮助了我:是的。这就是我们需要的。。。所有这些碎片都支持ect。。。让我失望了。
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)) .getMap(); to
map= ((SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map)).getMap();
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.googlemapsv2"
android:versionCode="1"
android:versionName="1.0" >
<permission
android:name="com.example.googlemapsv2.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.example.googlemapsv2.permission.MAPS_RECEIVE" />
<uses-sdk
android:minSdkVersion="12"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<!-- Required to show current location -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- Required OpenGL ES 2.0. for Maps V2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<!-- Requires OpenGL ES version 2 -->
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name="com.example.googlemapsv2.MainActivity"
android:label="@string/app_name"
android:theme="@style/AppBaseTheme" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Google API Key -->
<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.API_KEY"
android:value="your Google map API key" />
</application>