我这里有一个典型的问题。我已经尝试成功加载 Android 地图，也尝试成功加载启动画面。
现在，当我尝试在启动画面后加载地图时，出现以下异常
04-08 00:35:46.890: E/AndroidRuntime(19891): FATAL EXCEPTION: main
04-08 00:35:46.890: E/AndroidRuntime(19891): java.lang.NoClassDefFoundError: com.google.android.gms.R$styleable
04-08 00:35:46.890: E/AndroidRuntime(19891): at com.google.android.gms.maps.GoogleMapOptions.createFromAttributes(Unknown Source)
04-08 00:35:46.890: E/AndroidRuntime(19891): at com.google.android.gms.maps.MapFragment.onInflate(Unknown Source)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.app.Activity.onCreateView(Activity.java:4242)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:673)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
04-08 00:35:46.890: E/AndroidRuntime(19891): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.app.Activity.setContentView(Activity.java:1835)
04-08 00:35:46.890: E/AndroidRuntime(19891): at com.example.androidmapsv2.MainActivity.onCreate(MainActivity.java:53)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.app.Activity.performCreate(Activity.java:4465)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.app.ActivityThread.access$600(ActivityThread.java:123)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.os.Handler.dispatchMessage(Handler.java:99)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.os.Looper.loop(Looper.java:137)
04-08 00:35:46.890: E/AndroidRuntime(19891): at android.app.ActivityThread.main(ActivityThread.java:4424)
04-08 00:35:46.890: E/AndroidRuntime(19891): at java.lang.reflect.Method.invokeNative(Native Method)
04-08 00:35:46.890: E/AndroidRuntime(19891): at java.lang.reflect.Method.invoke(Method.java:511)
04-08 00:35:46.890: E/AndroidRuntime(19891): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
04-08 00:35:46.890: E/AndroidRuntime(19891): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554)
04-08 00:35:46.890: E/AndroidRuntime(19891): at dalvik.system.NativeStart.main(Native Method)
04-08 00:35:49.703: I/Process(19891): Sending signal. PID: 19891 SIG: 9
我已经按照所有基本程序嵌入地图和显示启动画面，因为当我尝试单独实现它们时成功了。
我已经确保 google-play-services jar 和 android-supportv4 jar 在 libs 文件夹中并且被正确引用。
MainActivity.java
package com.example.androidmapsv2;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.MapFragment;
//import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.GoogleMap.OnMapClickListener;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.PolylineOptions;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.FragmentManager;
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
//import android.support.v4.app.FragmentActivity;
//import android.support.v4.app.FragmentManager;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity implements OnMapClickListener,
OnMapLongClickListener, LocationListener {
final int RQS_GooglePlayServices = 1;
private GoogleMap myMap;
Location myLocation;
TextView tvLocInfo;
LocationListener myLocationListener;
double CURRENT_LAT = 0.0;
double CURRENT_LON = 0.0;
double PREVIOUS_LAT = 0.0;
double PREVIOUS_LON = 0.0;
LocationManager locationManager;
String provider;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvLocInfo = (TextView) findViewById(R.id.locinfo);
FragmentManager myFragmentManager = getFragmentManager();
MapFragment myMapFragment = (MapFragment) myFragmentManager
.findFragmentById(R.id.map);
myMap = myMapFragment.getMap();
myMap.setMyLocationEnabled(true);
// myMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
myMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
// myMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
// myMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
// Getting LocationManager object
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Creating an empty criteria object
Criteria criteria = new Criteria();
// Getting the name of the provider that meets the criteria
provider = locationManager.getBestProvider(criteria, false);
if (provider != null && !provider.equals("")) {
// Get the location from the given provider
Location location = locationManager.getLastKnownLocation(provider);
locationManager.requestLocationUpdates(provider, 20000, 1, this);
if (location != null) {
onLocationChanged(location);
} else {
Toast.makeText(getBaseContext(), "Location can't be retrieved",
Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getBaseContext(), "No Provider Found",
Toast.LENGTH_SHORT).show();
}
myMap.setOnMapClickListener(this);
myMap.setOnMapLongClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_legalnotices:
String LicenseInfo = GooglePlayServicesUtil
.getOpenSourceSoftwareLicenseInfo(getApplicationContext());
AlertDialog.Builder LicenseDialog = new AlertDialog.Builder(
MainActivity.this);
LicenseDialog.setTitle("Legal Notices");
LicenseDialog.setMessage(LicenseInfo);
LicenseDialog.show();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
int resultCode = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(getApplicationContext());
if (resultCode == ConnectionResult.SUCCESS) {
Toast.makeText(getApplicationContext(),
"isGooglePlayServicesAvailable SUCCESS", Toast.LENGTH_LONG)
.show();
} else {
GooglePlayServicesUtil.getErrorDialog(resultCode, this,
RQS_GooglePlayServices);
}
}
@Override
public void onMapClick(LatLng point) {
tvLocInfo.setText(point.toString());
myMap.animateCamera(CameraUpdateFactory.newLatLng(point));
}
@Override
public void onMapLongClick(LatLng point) {
tvLocInfo.setText("New marker added@" + point.toString());
myMap.addMarker(new MarkerOptions().position(point).title(
point.toString()));
// Polyline line =
// myMap.addPolyline(new PolylineOptions().add(
// new LatLng(12.97202903709172, 80.21577659994364),
// new LatLng(12.978670181826473, 80.2174412459135))
// .geodesic(true));
double lat = point.latitude;
double lon = point.longitude;
System.out.println("lat = "+lat);
CURRENT_LAT = lat;
CURRENT_LON = lon;
tvLocInfo.setText("lat: " + lat + "\n" + "lon: " + lon);
LatLng latlng = new LatLng(lat,
lon);
myMap.animateCamera(CameraUpdateFactory.newLatLng(latlng));
if (CURRENT_LAT != 0.0 && CURRENT_LON != 0.0 && PREVIOUS_LAT != 0.0
&& PREVIOUS_LON != 0.0) {
myMap.addPolyline(new PolylineOptions().add(
new LatLng(PREVIOUS_LAT, PREVIOUS_LON),
new LatLng(CURRENT_LAT, CURRENT_LON)).geodesic(true));
}
PREVIOUS_LAT = CURRENT_LAT;
PREVIOUS_LON = CURRENT_LON;
}
@Override
public void onLocationChanged(Location myLocation) {
// TODO Auto-generated method stub
// if (myLocationListener != null) {
// myLocationListener.onLocationChanged(myLocation);
double lat = myLocation.getLatitude();
double lon = myLocation.getLongitude();
CURRENT_LAT = lat;
CURRENT_LON = lon;
tvLocInfo.setText("lat: " + lat + "\n" + "lon: " + lon);
LatLng latlng = new LatLng(myLocation.getLatitude(),
myLocation.getLongitude());
myMap.animateCamera(CameraUpdateFactory.newLatLng(latlng));
if (CURRENT_LAT != 0.0 && CURRENT_LON != 0.0 && PREVIOUS_LAT != 0.0
&& PREVIOUS_LON != 0.0) {
myMap.addPolyline(new PolylineOptions().add(
new LatLng(PREVIOUS_LAT, PREVIOUS_LON),
new LatLng(CURRENT_LAT, CURRENT_LON)).geodesic(true));
}
PREVIOUS_LAT = CURRENT_LAT;
PREVIOUS_LON = CURRENT_LON;
// }
}
@Override
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
}
闪屏.java
package com.example.androidmapsv2;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
public class SplashScreen extends Activity {
private static final int SPLASH_TIME = 3 * 1000;// 3 seconds
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splashscreen);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Intent intent = new Intent(SplashScreen.this,
MainActivity.class);
startActivity(intent);
SplashScreen.this.finish();
overridePendingTransition(R.anim.fade_in, R.anim.fade_out);
}
}, SPLASH_TIME);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
}
}, SPLASH_TIME);
}
@Override
public void onBackPressed() {
this.finish();
super.onBackPressed();
}
}
activity_main.xml
<LinearLayout 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"
android:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:id="@+id/locinfo"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.MapFragment"/>
</LinearLayout>
闪屏.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:background="@drawable/splash"
android:layout_height="fill_parent"
android:orientation="vertical" >
</RelativeLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidmapsv2"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="16" />
<permission
android:name="com.example.androidmapsv2.permission.MAPS_RECEIVE"
android:protectionLevel="signature" >
</permission>
<uses-permission android:name="com.example.androidmapsv2.permission.MAPS_RECEIVE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<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" >
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="AIzaSyAkfu2ZAgQfO6iQ_ldkOAaVyMOPDmq_Lg0" />
<activity
android:name="com.example.androidmapsv2.SplashScreen"
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.androidmapsv2.MainActivity" >
</activity>
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="My Key" />
</application>
</manifest>
请看下面的结构
我还使用了最新的 API 密钥和其他基本的东西。
