我试图将谷歌地图集成到我现有的项目中。我制作了一个按钮，可以直接链接到谷歌地图。但是，当我点击该按钮时，我的应用程序崩溃了。另外在清单中我是否需要为地图添加意图过滤器？我已将它的意图过滤到DEFAULT。以下是清单
的代码 `<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="mom.abhhi.tripindia"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<!-- The following two permissions are not required to use
Google Maps Android API v2, but are recommended. -->
<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" >
<activity android:name=".Splashactivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="mom.abhhi.tripindia.Home"
android:label="@string/app_name" >
<intent-filter>
<action android:name="mom.abhhi.tripindia.HOME" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="mom.abhhi.tripindia.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="mom.abhhi.tripindia.HAINACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".About"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Delhi"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mumbai"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Chennai"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kolkata"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Welcome1"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Place1"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Food1"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Food2"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Shop1"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DAksh"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DBangla"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DIndia_Gate"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DJama"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DJantar"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DKod"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DLotus"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DQutub"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DRash"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DRed_Fort"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFBarbeque"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFBig"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFBukhara"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFHard_Rock"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFIce"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFMy_Bar"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFParikrama"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFPirates"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFStarbucks"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFUnderdoggs"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFWarehouse"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DFWhite"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DSChand"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DSDilli"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DSJanpatH"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DSKhan"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DSLajpat"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DSPahar"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DSSaroj"
android:label="@string/app_name" >
</activity>
<activity
android:name=".DSSundar"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Welcome4"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Place4"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kphow"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Welcome2"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mali"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mbandra"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mele"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mgoi"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mjuhu"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mmarine"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mnari"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Msidhi"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mwater"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Plcae2"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mfaer"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mfaurus"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mfcandies"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mfdoor"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mfglobal"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mfirish"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mfsmash"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mfspice"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Shop2"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mschor"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mscolaba"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mscraw"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Msfashion"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mshigh"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Msinorbit"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Mslinking"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Msoberoi"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kfami"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kfballu"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kfbhojo"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kfkewpie"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kfoh"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kpbirla"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kpeden"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kpmarble"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kpnicco"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kpvictoria"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Kscroad"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Ksda"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Ksforum"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Ksnew"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Ksox"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Food4"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Shop4"
android:label="@string/app_name" >
</activity>
<activity
android:name=".Nearby"
android:label="@string/app_name" >
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyD3EED3R5nWdY9sizbPwThf05e1uGcPJls"/>
</application>
</manifest>'
mainactivity.java
`package mom.abhhi.tripindia;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}`
mainactivity.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> `
mumbai.java
`package mom.abhhi.tripindia;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.RadioButton;
public class Mumbai extends Activity implements OnClickListener {
RadioButton rb;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mumbai);
View welcome2Click = findViewById(R.id.welcome2);
welcome2Click.setOnClickListener(this);
View place2Click = findViewById(R.id.place2);
place2Click.setOnClickListener(this);
View food2Click = findViewById(R.id.food2);
food2Click.setOnClickListener(this);
View shop2Click = findViewById(R.id.shop2);
shop2Click.setOnClickListener(this);
View change2Click = findViewById(R.id.change2);
change2Click.setOnClickListener(this);
View map2Click = findViewById(R.id.mumbai);
map2Click.setOnClickListener(this);
// View near2Click = findViewById(R.id.near2);
//near2Click.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.welcome2:
Intent i = new Intent(this, Welcome2.class);
startActivity(i);
break;
case R.id.place2:
Intent i1 = new Intent(this, Plcae2.class);
startActivity(i1);
break;
case R.id.food2:
Intent i2 = new Intent(this, Food2.class);
startActivity(i2);
break;
case R.id.shop2:
Intent i3 = new Intent(this, Shop2.class);
startActivity(i3);
break;
case R.id.change2:
Intent i4 = new Intent(this, Home.class);
startActivity(i4);
break;
case R.id.mumbai:
Intent i5 = new Intent(this, MainActivity.class);
startActivity(i5);
break;
/*case R.id.near2:
Intent i7 = new Intent(this, Nearby.class);
startActivity(i7);
break;*/
}
}
}'
logcat行
07-25 20:03:52.011: E/Trace(1000): error opening trace file: No such file or directory (2)
07-25 20:03:54.081: D/dalvikvm(1000): GC_FOR_ALLOC freed 43K, 7% free 2627K/2796K, paused 101ms, total 104ms
07-25 20:03:54.181: D/dalvikvm(1000): GC_CONCURRENT freed 1K, 6% free 3070K/3240K, paused 14ms+15ms, total 92ms
07-25 20:03:54.501: I/Choreographer(1000): Skipped 36 frames! The application may be doing too much work on its main thread.
07-25 20:03:54.531: D/gralloc_goldfish(1000): Emulator without GPU emulation detected.
07-25 20:04:00.140: D/dalvikvm(1000): GC_FOR_ALLOC freed 204K, 10% free 2941K/3268K, paused 233ms, total 261ms
07-25 20:04:00.200: I/dalvikvm-heap(1000): Grow heap (frag case) to 3.598MB for 640016-byte allocation
07-25 20:04:00.660: D/dalvikvm(1000): GC_CONCURRENT freed <1K, 9% free 3565K/3896K, paused 10ms+52ms, total 459ms
07-25 20:04:01.000: D/dalvikvm(1000): GC_FOR_ALLOC freed <1K, 9% free 3565K/3896K, paused 178ms, total 178ms
07-25 20:04:01.101: I/dalvikvm-heap(1000): Grow heap (frag case) to 4.970MB for 1440016-byte allocation
07-25 20:04:01.360: D/dalvikvm(1000): GC_CONCURRENT freed 0K, 7% free 4972K/5304K, paused 28ms+5ms, total 246ms
07-25 20:04:20.260: D/dalvikvm(1000): GC_FOR_ALLOC freed 633K, 14% free 5001K/5800K, paused 200ms, total 239ms
07-25 20:04:20.390: I/dalvikvm-heap(1000): Grow heap (frag case) to 6.096MB for 1150516-byte allocation
07-25 20:04:20.650: D/dalvikvm(1000): GC_CONCURRENT freed 465K, 19% free 5659K/6924K, paused 12ms+36ms, total 259ms
07-25 20:04:21.500: D/AndroidRuntime(1000): Shutting down VM
07-25 20:04:21.511: W/dalvikvm(1000): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
07-25 20:04:21.740: E/AndroidRuntime(1000): FATAL EXCEPTION: main
07-25 20:04:21.740: E/AndroidRuntime(1000): java.lang.RuntimeException: Unable to start activity ComponentInfo{mom.abhhi.tripindia/mom.abhhi.tripindia.Mumbai}: java.lang.NullPointerException
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.app.ActivityThread.access$600(ActivityThread.java:141)
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.os.Handler.dispatchMessage(Handler.java:99)
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.os.Looper.loop(Looper.java:137)
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.app.ActivityThread.main(ActivityThread.java:5041)
07-25 20:04:21.740: E/AndroidRuntime(1000): at java.lang.reflect.Method.invokeNative(Native Method)
07-25 20:04:21.740: E/AndroidRuntime(1000): at java.lang.reflect.Method.invoke(Method.java:511)
07-25 20:04:21.740: E/AndroidRuntime(1000): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-25 20:04:21.740: E/AndroidRuntime(1000): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-25 20:04:21.740: E/AndroidRuntime(1000): at dalvik.system.NativeStart.main(Native Method)
07-25 20:04:21.740: E/AndroidRuntime(1000): Caused by: java.lang.NullPointerException
07-25 20:04:21.740: E/AndroidRuntime(1000): at mom.abhhi.tripindia.Mumbai.onCreate(Mumbai.java:31)
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.app.Activity.performCreate(Activity.java:5104)
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
07-25 20:04:21.740: E/AndroidRuntime(1000): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
07-25 20:04:21.740: E/AndroidRuntime(1000): ... 11 more