我正在学习 android 谷歌地图开发，我正在关注 youtube 上的教程，它成功运行此代码，然后我插入一些代码以在地图上显示地图标记以获取位置，但它得到“不幸的是应用程序已停止” ，看起来问题出在我执行googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL)方法时。
这个 mainactivity.java
package com.example.mymap;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import android.os.Bundle;
import android.app.Activity;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GoogleMap googleMap;
googleMap = ((SupportMapFragment)(getSupportFragmentManager().findFragmentById(R.id.map))).getMap();
LatLng latLng = new LatLng(-33.796923, 150.922433);
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
googleMap.addMarker(new MarkerOptions()
.position(latLng)
.title("My Spot")
.snippet("This is my spot!")
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
googleMap.getUiSettings().setCompassEnabled(true);
googleMap.getUiSettings().setZoomControlsEnabled(true);
googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 10));
}
@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;
}
}
这很明显
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mymap"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<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 need to replace the key below with your own key. **
The example key below will not be accepted because it is not linked to the
certificate which you will use to sign this application.
See: https://developers.google.com/maps/documentation/android/start
for instructions on how to get your own key. -->
<meta-data android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyCvgeCVyyCQGLXxxmZ89NKKIB-VwMyzMqw"/>
<activity
android:name="com.example.mymap.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>
这是activity_main
<!-- This can go anywhere in your layout (see other demos for some examples). -->
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment"/>
这是我的日志猫
06-09 19:16:07.923: W/GooglePlayServicesUtil(1836): Google Play Store is missing.
06-09 19:16:07.923: W/GooglePlayServicesUtil(1836): Google Play Store is missing.
06-09 19:16:07.943: W/GooglePlayServicesUtil(1836): Google Play Store is missing.
06-09 19:16:07.943: W/GooglePlayServicesUtil(1836): Google Play Store is missing.
06-09 19:16:07.963: W/GooglePlayServicesUtil(1836): Google Play Store is missing.
06-09 19:16:08.143: W/GooglePlayServicesUtil(1836): Google Play Store is missing.
06-09 19:16:08.143: D/AndroidRuntime(1836): Shutting down VM
06-09 19:16:08.183: W/dalvikvm(1836): threadid=1: thread exiting with uncaught exception (group=0xb4da8908)
06-09 19:16:08.313: E/AndroidRuntime(1836): FATAL EXCEPTION: main
06-09 19:16:08.313: E/AndroidRuntime(1836): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mymap/com.example.mymap.MainActivity}: java.lang.NullPointerException
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.app.ActivityThread.access$600(ActivityThread.java:141)
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.os.Handler.dispatchMessage(Handler.java:99)
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.os.Looper.loop(Looper.java:137)
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.app.ActivityThread.main(ActivityThread.java:5039)
06-09 19:16:08.313: E/AndroidRuntime(1836): at java.lang.reflect.Method.invokeNative(Native Method)
06-09 19:16:08.313: E/AndroidRuntime(1836): at java.lang.reflect.Method.invoke(Method.java:511)
06-09 19:16:08.313: E/AndroidRuntime(1836): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
06-09 19:16:08.313: E/AndroidRuntime(1836): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
06-09 19:16:08.313: E/AndroidRuntime(1836): at dalvik.system.NativeStart.main(Native Method)
06-09 19:16:08.313: E/AndroidRuntime(1836): Caused by: java.lang.NullPointerException
06-09 19:16:08.313: E/AndroidRuntime(1836): at com.example.mymap.MainActivity.onCreate(MainActivity.java:26)
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.app.Activity.performCreate(Activity.java:5104)
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
06-09 19:16:08.313: E/AndroidRuntime(1836): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
06-09 19:16:08.313: E/AndroidRuntime(1836): ... 11 more
06-09 19:16:08.493: D/dalvikvm(1836): GC_CONCURRENT freed 151K, 10% free 2582K/2844K, paused 28ms+3ms, total 170ms
06-09 19:17:11.352: E/Trace(1973): error opening trace file: No such file or directory (2)
06-09 19:17:11.352: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:11.352: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:11.352: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:11.602: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:11.602: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:11.992: W/GooglePlayServicesUtil(1973): Google Play Store is missing.
06-09 19:17:12.002: W/GooglePlayServicesUtil(1973): Google Play Store is missing.
06-09 19:17:12.022: W/GooglePlayServicesUtil(1973): Google Play Store is missing.
06-09 19:17:12.022: W/GooglePlayServicesUtil(1973): Google Play Store is missing.
06-09 19:17:12.033: W/GooglePlayServicesUtil(1973): Google Play Store is missing.
06-09 19:17:12.173: W/GooglePlayServicesUtil(1973): Google Play Store is missing.
06-09 19:17:12.173: W/GooglePlayServicesUtil(1973): Google Play Store is missing.
06-09 19:17:12.232: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.232: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.242: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.292: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.392: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.392: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.392: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.432: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.432: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.442: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.452: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.452: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.452: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.482: D/gralloc_goldfish(1973): Emulator without GPU emulation detected.
06-09 19:17:12.622: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.653: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.772: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.772: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.812: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.812: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.862: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:12.862: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:32.752: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:32.752: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:32.784: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:32.822: W/Trace(1973): Unexpected value from nativeGetEnabledTags: 0
06-09 19:17:32.862: D/dalvikvm(1973): GC_CONCURRENT freed 140K, 9% free 2583K/2836K, paused 28ms+3ms, total 79ms
06-09 19:20:04.864: E/Trace(2082): error opening trace file: No such file or directory (2)
06-09 19:20:04.864: W/Trace(2082): Unexpected value from nativeGetEnabledTags: 0
06-09 19:20:04.864: W/Trace(2082): Unexpected value from nativeGetEnabledTags: 0
06-09 19:20:04.864: W/Trace(2082): Unexpected value from nativeGetEnabledTags: 0
06-09 19:20:04.954: W/Trace(2082): Unexpected value from nativeGetEnabledTags: 0
06-09 19:20:04.964: W/Trace(2082): Unexpected value from nativeGetEnabledTags: 0
06-09 19:20:05.364: W/GooglePlayServicesUtil(2082): Google Play Store is missing.
06-09 19:20:05.364: W/GooglePlayServicesUtil(2082): Google Play Store is missing.
06-09 19:20:05.375: W/GooglePlayServicesUtil(2082): Google Play Store is missing.
06-09 19:20:05.384: W/GooglePlayServicesUtil(2082): Google Play Store is missing.
06-09 19:20:05.384: W/GooglePlayServicesUtil(2082): Google Play Store is missing.
06-09 19:20:05.464: W/GooglePlayServicesUtil(2082): Google Play Store is missing.
06-09 19:20:05.474: D/AndroidRuntime(2082): Shutting down VM
06-09 19:20:05.484: W/dalvikvm(2082): threadid=1: thread exiting with uncaught exception (group=0xb4da8908)
06-09 19:20:05.554: E/AndroidRuntime(2082): FATAL EXCEPTION: main
06-09 19:20:05.554: E/AndroidRuntime(2082): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mymap/com.example.mymap.MainActivity}: java.lang.NullPointerException
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.app.ActivityThread.access$600(ActivityThread.java:141)
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.os.Handler.dispatchMessage(Handler.java:99)
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.os.Looper.loop(Looper.java:137)
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.app.ActivityThread.main(ActivityThread.java:5039)
06-09 19:20:05.554: E/AndroidRuntime(2082): at java.lang.reflect.Method.invokeNative(Native Method)
06-09 19:20:05.554: E/AndroidRuntime(2082): at java.lang.reflect.Method.invoke(Method.java:511)
06-09 19:20:05.554: E/AndroidRuntime(2082): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
06-09 19:20:05.554: E/AndroidRuntime(2082): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
06-09 19:20:05.554: E/AndroidRuntime(2082): at dalvik.system.NativeStart.main(Native Method)
06-09 19:20:05.554: E/AndroidRuntime(2082): Caused by: java.lang.NullPointerException
06-09 19:20:05.554: E/AndroidRuntime(2082): at com.example.mymap.MainActivity.onCreate(MainActivity.java:26)
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.app.Activity.performCreate(Activity.java:5104)
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
06-09 19:20:05.554: E/AndroidRuntime(2082): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
06-09 19:20:05.554: E/AndroidRuntime(2082): ... 11 more
06-09 19:20:05.615: D/dalvikvm(2082): GC_CONCURRENT freed 164K, 10% free 2583K/2860K, paused 12ms+3ms, total 95ms
06-09 19:21:18.635: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:18.635: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:18.635: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:18.725: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:18.735: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.115: W/GooglePlayServicesUtil(2135): Google Play Store is missing.
06-09 19:21:19.125: W/GooglePlayServicesUtil(2135): Google Play Store is missing.
06-09 19:21:19.125: W/GooglePlayServicesUtil(2135): Google Play Store is missing.
06-09 19:21:19.135: W/GooglePlayServicesUtil(2135): Google Play Store is missing.
06-09 19:21:19.146: W/GooglePlayServicesUtil(2135): Google Play Store is missing.
06-09 19:21:19.236: W/GooglePlayServicesUtil(2135): Google Play Store is missing.
06-09 19:21:19.236: W/GooglePlayServicesUtil(2135): Google Play Store is missing.
06-09 19:21:19.395: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.395: I/Choreographer(2135): Skipped 33 frames! The application may be doing too much work on its main thread.
06-09 19:21:19.395: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.406: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.415: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.465: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.465: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.465: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.545: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.545: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.555: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.565: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.565: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.596: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.636: D/dalvikvm(2135): GC_CONCURRENT freed 144K, 9% free 2581K/2836K, paused 13ms+0ms, total 138ms
06-09 19:21:19.646: D/gralloc_goldfish(2135): Emulator without GPU emulation detected.
06-09 19:21:19.745: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.755: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.875: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:19.875: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:20.015: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:20.015: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:20.046: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0
06-09 19:21:20.046: W/Trace(2135): Unexpected value from nativeGetEnabledTags: 0