java - Android 版 Google map V2 无法正常工作？

Question

大家好，我是 android 新手，我正在尝试将 Google map V2 与我的 android 应用程序连接起来。为此，我遵循此 tutorial和 this one also但是当我每次尝试午餐时，我的应用程序都会显示以下错误。

我的 MainActivity.java

package com.example.map;


import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.FragmentManager;
import android.os.Build;
import android.os.Bundle;
import android.view.Menu;

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

@SuppressLint("NewApi")
public class MainActivity extends Activity {
  static final LatLng HAMBURG = new LatLng(53.558, 9.927);
  static final LatLng KIEL = new LatLng(53.551, 9.993);
  private GoogleMap map;

  @TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    FragmentManager fragmentManager = getFragmentManager();
    MapFragment mapFragment =  (MapFragment) fragmentManager.findFragmentById(R.id.map);
    map = mapFragment.getMap();
    //map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
    Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
        .title("Hamburg"));
    Marker kiel = map.addMarker(new MarkerOptions()
        .position(KIEL)
        .title("Kiel")
        .snippet("Kiel is cool")
        .icon(BitmapDescriptorFactory
            .fromResource(R.drawable.ic_launcher)));

    // Move the camera instantly to hamburg with a zoom of 15.
    map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));

    // Zoom in, animating the camera.
    map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

}

我的activity_main.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" >


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

</RelativeLayout>

我的 AndroidManifest.xml

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

     <permission
        android:name="in.wptrafficanalyzer.locationingooglemapv2.permission.MAPS_RECEIVE"
        android:protectionLevel="signature"/>

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />

    <uses-permission android:name="in.wptrafficanalyzer.locationingooglemapv2.permission.MAPS_RECEIVE"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

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


        <activity
            android:name="com.example.map.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="the key" />
    </application>

</manifest>

我的猫

09-05 08:09:55.435: E/AndroidRuntime(490): FATAL EXCEPTION: main
09-05 08:09:55.435: E/AndroidRuntime(490): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.map/com.example.map.MainActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.os.Handler.dispatchMessage(Handler.java:99)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.os.Looper.loop(Looper.java:123)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.app.ActivityThread.main(ActivityThread.java:4627)
09-05 08:09:55.435: E/AndroidRuntime(490):  at java.lang.reflect.Method.invokeNative(Native Method)
09-05 08:09:55.435: E/AndroidRuntime(490):  at java.lang.reflect.Method.invoke(Method.java:521)
09-05 08:09:55.435: E/AndroidRuntime(490):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-05 08:09:55.435: E/AndroidRuntime(490):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-05 08:09:55.435: E/AndroidRuntime(490):  at dalvik.system.NativeStart.main(Native Method)
09-05 08:09:55.435: E/AndroidRuntime(490): Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class fragment
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
09-05 08:09:55.435: E/AndroidRuntime(490):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.app.Activity.setContentView(Activity.java:1647)
09-05 08:09:55.435: E/AndroidRuntime(490):  at com.example.map.MainActivity.onCreate(MainActivity.java:31)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
09-05 08:09:55.435: E/AndroidRuntime(490):  ... 11 more
09-05 08:09:55.435: E/AndroidRuntime(490): Caused by: java.lang.ClassNotFoundException: android.view.fragment in loader dalvik.system.PathClassLoader[/data/app/com.example.map-2.apk]
09-05 08:09:55.435: E/AndroidRuntime(490):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
09-05 08:09:55.435: E/AndroidRuntime(490):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
09-05 08:09:55.435: E/AndroidRuntime(490):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.view.LayoutInflater.createView(LayoutInflater.java:466)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.view.LayoutInflater.onCreateView(LayoutInflater.java:544)
09-05 08:09:55.435: E/AndroidRuntime(490):  at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)
09-05 08:09:55.435: E/AndroidRuntime(490):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
09-05 08:09:55.435: E/AndroidRuntime(490):  ... 20 more

我的代码有什么问题？？

Answer 1

你的最小 sdk 是 8

android:minSdkVersion="8"

您的类必须扩展 FragmentActivty

使用 SupportMapFragment 而不是 MapFragment

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

也导入

import android.support.v4.app.FragmentActivity;  
import com.google.android.gms.maps.SupportMapFragment;

编辑:

你的包名是

package="com.example.map"

所以改成

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

和

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