您好，我是新手，我正在编写一个带有 4 个选项卡和 V2 谷歌地图的应用程序。我的代码没有显示任何错误，但我使用 LogCat 收到了这个：
05-16 07:02:52.558: W/dalvikvm(2395): Unable to resolve superclass of Lcom/rmcsos/rmcsosapp/VendorMapActivity; (15)
05-16 07:02:52.598: W/dalvikvm(2395): Link of class com/rmcsos/rmcsosapp/VendorMapActivity;' failed
05-16 07:02:52.598: E/dalvikvm(2395): Could not find class com.rmcsos.rmcsosapp.VendorMapActivity', referenced from method
com.rmcsos.rmcsosapp.MainActivity.onCreate
05-16 07:02:52.618: W/dalvikvm(2395): VFY: unable to resolve const-class 52
(Lcom/rmcsos/rmcsosapp/VendorMapActivity;) in Lcom/rmcsos/rmcsosapp/MainActivity;
05-16 07:02:52.618: D/dalvikvm(2395): VFY: replacing opcode 0x1c at 0x0084 05-16
07:02:52.908: D/dalvikvm(2395): GC_FOR_ALLOC freed 65K, 3% free
9891K/10179K, paused 71ms 05-16 07:02:52.918: I/dalvikvm-heap(2395):
Grow heap (frag case) to 10.329MB for 614416-byte allocation 05-16
07:02:53.099: D/dalvikvm(2395): GC_CONCURRENT freed <1K, 4% free
10490K/10823K, paused 14ms+16ms 05-16 07:02:53.398:
D/AndroidRuntime(2395): Shutting down VM 05-16 07:02:53.398:
W/dalvikvm(2395): threadid=1: thread exiting with uncaught exception
(group=0x409961f8) 05-16 07:02:53.458: E/AndroidRuntime(2395): FATAL
EXCEPTION: main 05-16 07:02:53.458: E/AndroidRuntime(2395):
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.example.androidtablayout/com.rmcsos.rmcsosapp.MainActivity}:
android.view.InflateException: Binary XML file line #20: Error
inflating class fragment 05-16 07:02:53.458: E/AndroidRuntime(2395):
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
05-16 07:02:53.458: E/AndroidRuntime(2395): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
05-16 07:02:53.458: E/AndroidRuntime(2395): at
android.app.ActivityThread.access$600(ActivityThread.java:122) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
05-16 07:02:53.458: E/AndroidRuntime(2395): at
android.os.Handler.dispatchMessage(Handler.java:99) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.os.Looper.loop(Looper.java:137) 05-16 07:02:53.458:
E/AndroidRuntime(2395): at
android.app.ActivityThread.main(ActivityThread.java:4340) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
java.lang.reflect.Method.invokeNative(Native Method) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
java.lang.reflect.Method.invoke(Method.java:511) 05-16 07:02:53.458:
E/AndroidRuntime(2395): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-16 07:02:53.458: E/AndroidRuntime(2395): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
dalvik.system.NativeStart.main(Native Method) 05-16 07:02:53.458:
E/AndroidRuntime(2395): Caused by: android.view.InflateException:
Binary XML file line #20: Error inflating class fragment 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697)
05-16 07:02:53.458: E/AndroidRuntime(2395): at
android.view.LayoutInflater.rInflate(LayoutInflater.java:739) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.view.LayoutInflater.rInflate(LayoutInflater.java:742) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.view.LayoutInflater.inflate(LayoutInflater.java:489) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.view.LayoutInflater.inflate(LayoutInflater.java:396) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.view.LayoutInflater.inflate(LayoutInflater.java:352) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
05-16 07:02:53.458: E/AndroidRuntime(2395): at
android.app.Activity.setContentView(Activity.java:1835) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
com.rmcsos.rmcsosapp.MainActivity.onCreate(MainActivity.java:16)
05-16 07:02:53.458: E/AndroidRuntime(2395): at
android.app.Activity.performCreate(Activity.java:4465) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
05-16 07:02:53.458: E/AndroidRuntime(2395): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
05-16 07:02:53.458: E/AndroidRuntime(2395): ... 11 more 05-16
07:02:53.458: E/AndroidRuntime(2395): Caused by:
java.lang.NullPointerException: name == null 05-16 07:02:53.458:
E/AndroidRuntime(2395): at
java.lang.VMClassLoader.findLoadedClass(Native Method) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
java.lang.ClassLoader.findLoadedClass(ClassLoader.java:354) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
java.lang.ClassLoader.loadClass(ClassLoader.java:491) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
java.lang.ClassLoader.loadClass(ClassLoader.java:461) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.app.Fragment.instantiate(Fragment.java:562) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.app.Fragment.instantiate(Fragment.java:540) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.app.Activity.onCreateView(Activity.java:4235) 05-16
07:02:53.458: E/AndroidRuntime(2395): at
android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:673)
05-16 07:02:53.458: E/AndroidRuntime(2395): ... 22 more 05-16
07:07:53.868: I/Process(2395): Sending signal. PID: 2395 SIG: 9
这是我的 Main_Activity.java 文件：
package com.rmcsos.rmcsosapp;
public class MainActivity extends TabActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TabHost tabHost = getTabHost();
TabSpec reviews_spec = tabHost.newTabSpec("");
reviews_spec.setIndicator("", getResources().getDrawable(R.drawable.reviews));
Intent reviews_Intent = new Intent(this, ReviewsActivity.class);
reviews_spec.setContent(reviews_Intent);
TabSpec myaccount_spec = tabHost.newTabSpec("");
myaccount_spec.setIndicator("", getResources().getDrawable(R.drawable.myaccount));
Intent myaccount_Intent = new Intent(this, MyAccountActivity.class);
myaccount_spec.setContent(myaccount_Intent);
// Tab for Settings
TabSpec settings_spec = tabHost.newTabSpec("");
settings_spec.setIndicator("", getResources().getDrawable(R.drawable.settings));
Intent settings_Intent = new Intent(this, SettingsActivity.class);
settings_spec.setContent(settings_Intent);
//Tab for Maps
TabSpec map_spec = tabHost.newTabSpec("");
map_spec.setIndicator("",getResources().getDrawable(R.drawable.map));
Intent map_Intent = new Intent(this, VendorMapActivity.class);
map_spec.setContent(map_Intent);
// Adding all TabSpec to TabHost
tabHost.addTab(map_spec); //Adding map tab
tabHost.addTab(reviews_spec); // Adding reviews tab
tabHost.addTab(myaccount_spec); // Adding my_account tab
tabHost.addTab(settings_spec); // Adding settings tab
} }
这是我的 Android 清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidtablayout"
android:versionCode="1"
android:versionName="1.0" xmlns:tools="http://schemas.android.com/tools">
<uses-sdk android:minSdkVersion="11"
android:targetSdkVersion="17"/>
<permission
android:name="com.arthur.sos.permission.MAPS_RECEIVE"
android:protectionLevel="signature" />
<uses-permission android:name="com.arthur.sos.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" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application android:icon="@drawable/rmcsos" android:label="@string/app_name" android:allowBackup="true">
<uses-library android:name="com.google.android.maps"/>
<activity android:name="com.rmcsos.rmcsosapp.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>
<!-- My Account Activity -->
<activity android:name="com.rmcsos.rmcsosapp.MyAccountActivity" />
<!-- Settings Activity -->
<activity android:name="com.rmcsos.rmcsosapp.SettingsActivity" />
<!-- Reviews Activity -->
<activity android:name="com.rmcsos.rmcsosapp.ReviewsActivity" />
<!-- Map Activity -->
<activity android:name="com.rmcsos.rmcsosapp.VendorMapActivity"/>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="My Key" />
</application>
</manifest>
这是我的 VendorMapActivity.java，这是地图所在的位置：
package com.rmcsos.rmcsosapp;
public class VendorMapActivity extends FragmentActivity {
static final LatLng Whittier = new LatLng(33.9417909, -117.9861795);
private GoogleMap map;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
.getMap();
@SuppressWarnings("unused")
Marker W1 = map.addMarker(new MarkerOptions().position(Whittier).title("Whittier").snippet("Re/Max").icon(BitmapDescriptorFactory.
fromResource(R.drawable.rmcsos)));
map.moveCamera(CameraUpdateFactory.newLatLngZoom(Whittier, 15));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
return null;
}
return (LinearLayout)inflater.inflate(R.layout.maps, container, false);
}
}
这是 Maps 片段的 XML：
<?xml version="1.0" encoding="utf-8"?>
<!-- Please note when ready for production, you may wan to change "fill_parent" to: "match_parent"-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<!-- Screen Design for the map -->
<TextView android:text="@string/maptext"
android:padding="15dip"
android:textSize="18sp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<fragment
android:id="@+id/map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
class="com.google.android.gms.maps.MapFragment" />
</LinearLayout>
任何帮助都将不胜感激，我是新手，我正在努力理解。谢谢！！！