Question

我实施了Google Maps tutorial from this link。但我收到运行时错误，应用程序崩溃了。请帮助我。我跟着其他类似的问题，但一直无法找到解决方案。问题似乎是在我更新Google Play服务之后。

主要活动：

package com.example.sahayog;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends Activity {
  static final LatLng HAMBURG = new LatLng(53.558, 9.927);
  static final LatLng KIEL = new LatLng(53.551, 9.993);
  private GoogleMap map;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
        .getMap();
    Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
        .title("Hamburg"));
    Marker kiel = map.addMarker(new MarkerOptions()
        .position(KIEL) 
        .title("Kiel") 
        .snippet("Kiel is cool")
        .icon(BitmapDescriptorFactory
            .fromResource(R.drawable.ic_launcher)));

    // Move the camera instantly to hamburg with a zoom of 15.
    map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
     // Zoom in, animating the camera.
    map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
  }

  @Override 
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true; 
  }

}

Logcat：

     03-06 12:21:26.660: E/AndroidRuntime(12319): FATAL EXCEPTION: main
     03-06 12:21:26.660: E/AndroidRuntime(12319): Process:  com.example.sahayog, PID: 12319
     03-06 12:21:26.660: E/AndroidRuntime(12319): java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/maps/model/LatLng;
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at com.example.sahayog.MainActivity.<clinit>(MainActivity.java:16)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at java.lang.reflect.Constructor.newInstance(Native Method)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at java.lang.Class.newInstance(Class.java:1572)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at android.app.Instrumentation.newActivity(Instrumentation.java:1065)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2199)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at android.app.ActivityThread.access$800(ActivityThread.java:144)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at android.os.Handler.dispatchMessage(Handler.java:102)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at android.os.Looper.loop(Looper.java:135)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at android.app.ActivityThread.main(ActivityThread.java:5221)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at java.lang.reflect.Method.invoke(Native Method)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at java.lang.reflect.Method.invoke(Method.java:372)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
     03-06 12:21:26.660: E/AndroidRuntime(12319): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.maps.model.LatLng" on path: DexPathList[[zip file "/data/app/com.example.sahayog-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
     03-06 12:21:26.660: E/AndroidRuntime(12319):   ... 15 more
     03-06 12:21:26.660: E/AndroidRuntime(12319):   Suppressed: java.lang.ClassNotFoundException: com.google.android.gms.maps.model.LatLng
     03-06 12:21:26.660: E/AndroidRuntime(12319):       at java.lang.Class.classForName(Native Method)
     03-06 12:21:26.660: E/AndroidRuntime(12319):       at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
     03-06 12:21:26.660: E/AndroidRuntime(12319):       at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
     03-06 12:21:26.660: E/AndroidRuntime(12319):       at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
     03-06 12:21:26.660: E/AndroidRuntime(12319):       ... 16 more
     03-06 12:21:26.660: E/AndroidRuntime(12319):   Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

Answer 1

试试这个：

    int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext());

    if(status!=ConnectionResult.SUCCESS)
    {
        // Google Play Services are not available
       Toast.makeText(mContext, "Please install a maps application", Toast.LENGTH_LONG).show();
    }
    else
    {
        // Google Play Services are available
        map = ((MapFragment)   getFragmentManager().findFragmentById(R.id.map))
    .getMap();
       Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
       .title("Hamburg"));
       Marker kiel = map.addMarker(new MarkerOptions()
      .position(KIEL) 
      .title("Kiel") 
      .snippet("Kiel is cool")
      .icon(BitmapDescriptorFactory
        .fromResource(R.drawable.ic_launcher)));

      // Move the camera instantly to hamburg with a zoom of 15.
      map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));
     // Zoom in, animating the camera.
     map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
    }

Google Play服务/地图NoClassDefFoundError

1 个答案: