Android Google地图应用程序 - Mainactivity.java错误

Question

我正在尝试使用Google Maps V2开发我的第一个Android应用程序。我已经从这个网站复制了一个代码：source我按照说明一步一步地进行了操作。现在我在Mainactivity中收到这些错误，我不知道出了什么问题。

我在以下几行中出错：

setContentView(R.layout.activity_main); 

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

getMenuInflater().inflate(R.menu.main, menu);

Mainactivity.java

package info.tekguc.umut.googlemapsmapsandroidv2;

import info.tekguc.umut.googlemapsmapsandroidv2.R;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;


import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

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;
    }

}

---

activity_main.xml中

    <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" >

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        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>

的AndroidManifest.xml

            <?xml version="1.0" encoding="utf-8"?>
            <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.androidmapsv2.permission.MAPS_RECEIVE" 
                    android:protectionLevel="signature"></permission>
                <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="AIzaSyDciL7-T3BphxGv2q-A77vNrcyJQ_sTrgI"/>
<meta-data
    android:name="com.google.android.gms.version"
    android:value="@integer/google_play_services_version" />
                    <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>

            </manifest>

Answer 1

删除

import android.R;

并且您在清单文件中缺少元标记

<meta-data
    android:name="com.google.android.gms.version"
    android:value="@integer/google_play_services_version" />

你应该

import info.tekguc.umut.googlemapsmapsandroidv2.R;

如果是相同的包，则无需导入