谷歌地图v2，缺少'android.support.v4.app.FragmentActivity'

Question

My problem:

• after installing the activity there are error-messages in the LogCat (Could not find class ' android.support.v4.app.FragmentActivity '), but I don't use FragmentActivity and the application is running without problems.
• my device: GT-I8190 , Android 4.1.2

Logcat:

04-30 13:55:46.294: E/dalvikvm(7011): Could not find class 'android.support.v4.app.FragmentActivity',
 referenced from method com.google.android.gms.common.GooglePlayServicesUtil.showErrorDialogFragment
04-30 13:55:46.294: W/dalvikvm(7011): VFY: unable to resolve instanceof 135 (Landroid/support/v4/app/FragmentActivity;)
 in Lcom/google/android/gms/common/GooglePlayServicesUtil;
04-30 13:55:46.294: D/dalvikvm(7011): VFY: replacing opcode 0x20 at 0x0008
04-30 13:55:46.294: E/dalvikvm(7011): Could not find class 'android.support.v4.app.FragmentActivity',
 referenced from method com.google.android.gms.common.GooglePlayServicesUtil.showErrorDialogFragment
04-30 13:55:46.294: W/dalvikvm(7011): VFY: unable to resolve check-cast 135 (Landroid/support/v4/app/FragmentActivity;)
 in Lcom/google/android/gms/common/GooglePlayServicesUtil;
04-30 13:55:46.294: D/dalvikvm(7011): VFY: replacing opcode 0x1f at 0x000c
04-30 13:55:46.474: D/dalvikvm(7011): GC_CONCURRENT freed 192K, 11% free 9604K/10759K, paused 20ms+3ms, total 72ms
04-30 13:55:46.474: D/dalvikvm(7011): WAIT_FOR_CONCURRENT_GC blocked 33ms
04-30 13:55:46.524: I/Google Maps Android API(7011): Google Play services client version: 4323000
04-30 13:55:46.534: I/Google Maps Android API(7011): Google Play services package version: 4325034

Manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.thomaskuenneth.examples"
    android:versionCode="1"
    android:versionName="1.0" >
    <!-- Original: beide Werte=17 -->
    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="17" />
    <permission
        android:name="com.thomaskuenneth.examples.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />
    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />
    <uses-permission android:name="com.thomaskuenneth.examples.permission.MAPS_RECEIVE" />
    <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" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.thomaskuenneth.examples.MenuActivity2"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="AIzaSyATuuvskBPfu2A7EsrzQwDZYmVu8w0zZi8" />
    </application>
</manifest>

Activity:

package com.thomaskuenneth.examples;

import android.app.Activity;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.CheckBox;
import android.widget.Spinner;
import android.widget.Toast;

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.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MenuActivity2 extends Activity {
    private static final String TAG = MenuActivity2.class.getSimpleName(); 
    private LocationManager manager;
    private GoogleMap map;
    String sarr[] = {"Hamburg","53.558","9.927","Nürnberg","049:27","011:05",
            "Schochwitz","051:31:47","011:44:46","Bern","46.9466","7.44412",
            "Berlin","52.518611","13.376111","Wien","48.208031","16.358128",
            "Leipzig"," 51.340333","12.374751","Kalkutta","22:32:36","88:20:3"};
    int ortInd = 0;
    LatLng lalo;
    String ort="";
    LocationListener listener;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_menu);
        // get Location Manager
      manager = (LocationManager) getSystemService(LOCATION_SERVICE);
      map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
        String message="";
        if (map == null) {
            message="No map created";
            Toast.makeText(MenuActivity2.this, message, Toast.LENGTH_LONG).show();
            return;
        }
        message="Map created !!!";
        Toast.makeText(MenuActivity2.this, message, Toast.LENGTH_LONG).show();
    }
    void showmap() {
        //set marker, title only on touch on marker
        map.addMarker(new MarkerOptions().position(lalo).title(ort+"X"));
        // Move the camera instantly to hamburg with a zoom of 15.
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(lalo, 15));
        // Zoom in, animating the camera.
        map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);
    }
    @Override
    protected void onResume() {
      super.onResume();
//    getAllPrv();
    }
    @Override
    protected void onPause() {
      super.onPause();
      if (manager != null && listener != null)
        manager.removeUpdates(listener);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_menu, menu);
        return true;
    }
    void bestIndex(String s) {
      ortInd = -1;
      for (int i = 0; i<sarr.length; i+=3) {
          if (sarr[i].equalsIgnoreCase(s)) {
            ortInd = i;
            lalo = new LatLng(Location.convert(sarr[ortInd+1]),
                    Location.convert(sarr[ortInd+2]));
            showmap();
            break;
          }
      }
    }
  public boolean onOptionsItemSelected(MenuItem item) {
    String s="";
    switch (item.getItemId()) {
      default:
        s = (String) item.getTitle();
//          Toast.makeText(MenuActivity.this, s, Toast.LENGTH_SHORT).show();
        bestIndex(s);
    }
        return false;

  }
}

I am looking for an explanation for these messages. Please help me.

Regards Wicki

Answer 1

Those messages are really just warnings that the virtual machine (Dalvik) found some references to the FragmentActivity class, but that it was unable to find the definition of that class. As long as your code does not cause the code that references FragmentActivity to execute, you will have no problems. If you were to cause that code to execute, your app would crash.

Answer 2

do you have android-support-v4.jar in projects lib folder

If there is no " libs " folder then create one

then click

Project> Android Tools >Add support Library.

This will help you. Finally clean the project and restart Eclipse