如何在Android中顯示Google Map v2

我想在Android應用程序中顯示Google Map，但地圖不顯示。它會產生運行時異常。我成功添加了google-play-services_lib庫。如何在Android中顯示Google Map v2

我使用下面的代碼：

activity.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" 
android:paddingBottom="@dimen/activity_vertical_margin" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
tools:context=".MainActivity" > 


<fragment 
    android:id="@+id/map" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    class="com.google.android.gms.maps.MapFragment"/>

我manifest.xml文件：

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="info.tekguc.umut.googlemapsmapsandroidv2" 
android:versionCode="1" 
android:versionName="1.0" > 

<uses-sdk 
    android:minSdkVersion="14" 
    android:targetSdkVersion="17" /> 


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

<uses-permission android:name="com.example.androidmapview.permission.MAPS_RECEIVE" /> 
<uses-permission 
    android:name="com.example.androidmapsv2.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"/> 

<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.maps.v2.API_KEY" 
     android:value="AIzaSyBqkAj48WktmfULPBYgoXBGhYzSACisR5Q"/> 
    <activity 
     android:name="info.tekguc.umut.googlemapsmapsandroidv2.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> 
</application>

和我的日誌貓：

07-01 15:43:49.491: E/Trace(2439): error opening trace file: No such file or directory (2) 
07-01 15:43:50.221: E/AndroidRuntime(2439): FATAL EXCEPTION: main 
07-01 15:43:50.221: E/AndroidRuntime(2439): java.lang.RuntimeException: Unable to start activity ComponentInfo{info.tekguc.umut.googlemapsmapsandroidv2/info.tekguc.umut.googlemapsmapsandroidv2.MainActivity}: java.lang.NullPointerException 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.app.ActivityThread.access$600(ActivityThread.java:130) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.os.Looper.loop(Looper.java:137) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.app.ActivityThread.main(ActivityThread.java:4745) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at java.lang.reflect.Method.invoke(Method.java:511) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at dalvik.system.NativeStart.main(Native Method) 
07-01 15:43:50.221: E/AndroidRuntime(2439): Caused by: java.lang.NullPointerException 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at info.tekguc.umut.googlemapsmapsandroidv2.MainActivity.onCreate(MainActivity.java:24) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.app.Activity.performCreate(Activity.java:5008) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) 
07-01 15:43:50.221: E/AndroidRuntime(2439):  ... 11 more

和我mainactivity代碼

public class MainActivity extends Activity { 

private GoogleMap mMap; 

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

    mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap(); 
    mMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE); 
    final LatLng CIU = new LatLng(35.21843892856462, 33.41662287712097); 
    Marker ciu = mMap.addMarker(new MarkerOptions() 
           .position(CIU).title("My Office")); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.main, menu); 
    return true; 
}

來源

2013-07-01 Narender Sharma

發佈您的MainActivity代碼 –

試試這個，

public class MainActivity extends android.support.v4.app.FragmentActivity { 

private GoogleMap mMap; 

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

    mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap(); 
    mMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE); 
    final LatLng CIU = new LatLng(35.21843892856462, 33.41662287712097); 
    Marker ciu = mMap.addMarker(new MarkerOptions() 
           .position(CIU).title("My Office")); 
} 
}

來源

2013-07-01 10:37:09

就像我在下面，您必須編輯聲明XML片段：

而且還替換：

mMap= ((MapFragment) getSupportFragmentManager().findFragmentById(R.id.map)) 
       .getMap();

通過下列之一：

mMap= ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)) 
       .getMap();

順便說一句，請確保您正在擴展的FragmentActivity代替Activity。

public class MainActivity extends FragmentActivity

來源

2013-07-01 10:41:46 yugidroid

如何在Android中顯示Google Map v2

回答

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