包含谷歌地图的开放页面上的应用程序崩溃

Question

我有一个应用程序与主页面和其中一个页面/活动应该包含一个地图，但当我点击按钮打开它，我的应用程序崩溃。我该如何分类？

清单 -

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.edinburghnights1" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="8" 
     android:targetSdkVersion="18" /> 

    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> 
    <!-- External storage for caching. --> 
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
    <!-- My Location --> 
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> 
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 

    <!-- Maps API needs OpenGL ES 2.0. --> 
    <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" > 

     <!-- You must insert your own Google Maps for Android API v2 key in here. --> 
     <meta-data 
      android:name="com.google.android.maps.v2.API_KEY" 
      android:value="mykey" /> 

     <activity 
      android:name="com.example.edinburghnights1.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> 

     <activity 
      android:name="com.example.edinburghnights1.Map" 
      android:label="@string/app_name" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
      </intent-filter> 

      </activity> 

      <activity 
      android:name="com.example.edinburghnights1.WhatsOn" 
      android:label="@string/app_name" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
      </intent-filter> 

      </activity> 

      <activity 
      android:name="com.example.edinburghnights1.ClubList" 
      android:label="@string/app_name" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
      </intent-filter> 

      </activity> 



    </application> 

</manifest> 

XML -

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="#FF0000" 
    android:orientation="vertical" > 

    <Button 
     android:id="@+id/back5" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:background="#000000" 
     android:text="Back" 
     android:textColor="#FFFFFF" /> 

    <fragment 

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

</LinearLayout> 

爪哇 -

package com.example.edinburghnights1; 

import android.app.Activity; 
import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.support.v4.app.FragmentActivity; 
import android.view.View; 
import android.widget.Button; 

public class Map extends Activity{ // extends activity so it can be linked to rest of app 


     public void onCreate(Bundle savedInstanceState) { 

            super.onCreate(savedInstanceState); 
            setContentView(R.layout.mapsxml); //layout from mapsxml 
            Button b1=(Button)findViewById(R.id.back5); // name buttons to be used 


             b1.setOnClickListener(new View.OnClickListener() { 

             public void onClick(View v) { //action when clicked 
              Intent myintent2 = new Intent(Map.this,MainActivity.class); 
              startActivity(myintent2); 

             } 
            }); 
            private void initilizeMap() { 

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

              // check if map is created successfully or not 

              } 
     }} 

Answer 1

你应该改变这种

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

到

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

还需要您的活动延伸到FragmentActivity像：

public class Map extends android.support.v4.app.FragmentActivity 

Answer 2

更改您的GoogleMap的投给SupportMapFragment

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

到

googleMap = ((SupportMapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();