Android上的简单地图应用(google api v2).不起作用.错误

我尝试在Android上编写一个简单的地图应用程序,但唯一的结果是错误.我试图以它应该的方式编程,但它仍然无法正常工作.

主要活动

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

表现

我是这方面的新手,因此要求提供详细的帮助.

Log: 12-09 10:35:44.200: D/AndroidRuntime(24663): Shutting down VM
12-09 10:35:44.200: W/dalvikvm(24663): threadid=1: thread exiting with uncaught exception (group=0x415d5ba8)
12-09 10:35:44.200: E/AndroidRuntime(24663): FATAL EXCEPTION: main
12-09 10:35:44.200: E/AndroidRuntime(24663): Process: com.example.guidebook, PID: 24663
12-09 10:35:44.200: E/AndroidRuntime(24663): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.guidebook/com.example.guidebook.GuidebookActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.ActivityThread.access$800(ActivityThread.java:135)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.os.Handler.dispatchMessage(Handler.java:102)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.os.Looper.loop(Looper.java:136)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.ActivityThread.main(ActivityThread.java:5017)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at java.lang.reflect.Method.invokeNative(Native Method)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at java.lang.reflect.Method.invoke(Method.java:515)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at dalvik.system.NativeStart.main(Native Method)
12-09 10:35:44.200: E/AndroidRuntime(24663): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:290)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.Activity.setContentView(Activity.java:1929)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at com.example.guidebook.GuidebookActivity.onCreate(GuidebookActivity.java:12)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.Activity.performCreate(Activity.java:5231)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
12-09 10:35:44.200: E/AndroidRuntime(24663):    ... 11 more
12-09 10:35:44.200: E/AndroidRuntime(24663): Caused by: android.app.Fragment$InstantiationException: Trying to instantiate a class com.google.android.gms.maps.SupportMapFragment that is not a Fragment
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.Fragment.instantiate(Fragment.java:585)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.Fragment.instantiate(Fragment.java:561)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.app.Activity.onCreateView(Activity.java:4778)
12-09 10:35:44.200: E/AndroidRuntime(24663):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:689)
12-09 10:35:44.200: E/AndroidRuntime(24663):    ... 20 more
12-09 10:35:44.200: E/AndroidRuntime(24663): Caused by: java.lang.ClassCastException
12-09 10:35:44.200: E/AndroidRuntime(24663):    ... 24 more
12-09 10:36:10.520: D/AndroidRuntime(24870): Shutting down VM
12-09 10:36:10.520: W/dalvikvm(24870): threadid=1: thread exiting with uncaught exception (group=0x415d5ba8)
12-09 10:36:10.520: E/AndroidRuntime(24870): FATAL EXCEPTION: main
12-09 10:36:10.520: E/AndroidRuntime(24870): Process: com.example.guidebook, PID: 24870
12-09 10:36:10.520: E/AndroidRuntime(24870): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.guidebook/com.example.guidebook.GuidebookActivity}: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.ActivityThread.access$800(ActivityThread.java:135)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.os.Handler.dispatchMessage(Handler.java:102)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.os.Looper.loop(Looper.java:136)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.ActivityThread.main(ActivityThread.java:5017)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at java.lang.reflect.Method.invokeNative(Native Method)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at java.lang.reflect.Method.invoke(Method.java:515)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at dalvik.system.NativeStart.main(Native Method)
12-09 10:36:10.520: E/AndroidRuntime(24870): Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class fragment
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:713)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.view.LayoutInflater.inflate(LayoutInflater.java:469)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:290)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.Activity.setContentView(Activity.java:1929)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at com.example.guidebook.GuidebookActivity.onCreate(GuidebookActivity.java:12)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.Activity.performCreate(Activity.java:5231)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
12-09 10:36:10.520: E/AndroidRuntime(24870):    ... 11 more
12-09 10:36:10.520: E/AndroidRuntime(24870): Caused by: java.lang.NullPointerException: name == null
12-09 10:36:10.520: E/AndroidRuntime(24870):    at java.lang.VMClassLoader.findLoadedClass(Native Method)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at java.lang.ClassLoader.findLoadedClass(ClassLoader.java:350)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at java.lang.ClassLoader.loadClass(ClassLoader.java:487)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.Fragment.instantiate(Fragment.java:583)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.Fragment.instantiate(Fragment.java:561)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.app.Activity.onCreateView(Activity.java:4778)
12-09 10:36:10.520: E/AndroidRuntime(24870):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:689)
12-09 10:36:10.520: E/AndroidRuntime(24870):    ... 20 more
12-09 10:36:12.420: I/Process(24870): Sending signal. PID: 24870 SIG: 9

Siddharth_Vy.. 5

检查我的答案如下:

在你的xml文件中改变它 class="com.google.android.gms.maps.MapFragment" to android:name="com.google.android.gms.maps.SupportMapFragment"

将您的活动扩展到FragmentActivty并进行更改

map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)) .getMap(); to
map= ((SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map)).getMap();

还检查一下 if (map== null) { map= ((SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map)).getMap();}

检查清单文件:

希望这可以帮助.