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Google mapfragment not working in android

由 为君一笑 提交于 2019-12-18 09:49:40

问题


I have made a very simple demo program for android map view (api v2) by referring the following link,But my program doesn't shows map.its not running.Please help me,My code is as below:

main.xml

<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
          android:id="@+id/map"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:name="com.google.android.gms.maps.MapFragment"/>

main.java

    package com.example.mymap;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
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);

    }



}

manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mymap"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true"/>


    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <permission
        android:name="com.example.mymap.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

    <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="com.example.mymap.permission.MAPS_RECEIVE" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.mymap.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>

        <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="AIzaSyCuS-daQYgOZsmbIBYUTCl0P5tV0GTnjrI" />
    </application>

</manifest>

回答1:


Please try to use my running code.

Firstly import Google play service library project from /Android/android-sdk-linux/extras/google/google_play_services and after that create new project and write this code.

//Main Activity
package in.wptrafficanalyzer.multipleproximitymapv2;

import android.app.Dialog;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.widget.Toast;

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.OnMapClickListener;
import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CircleOptions;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends FragmentActivity {

GoogleMap googleMap;
LocationManager locationManager;
PendingIntent pendingIntent;
SharedPreferences sharedPreferences;
int locationCount = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Getting Google Play availability status
    int status = GooglePlayServicesUtil
            .isGooglePlayServicesAvailable(getBaseContext());

    // Showing status
    if (status != ConnectionResult.SUCCESS) { // Google Play Services are
                                                // not available

        int requestCode = 10;
        Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this,
                requestCode);
        dialog.show();

    } else { // Google Play Services are available

        // Getting reference to the SupportMapFragment of activity_main.xml
        SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);

        // Getting GoogleMap object from the fragment
        googleMap = fm.getMap();

        // Enabling MyLocation Layer of Google Map
        googleMap.setMyLocationEnabled(true);

        // Getting LocationManager object from System Service
        // LOCATION_SERVICE
        locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

        // Opening the sharedPreferences object
        sharedPreferences = getSharedPreferences("location", 0);

        // Getting number of locations already stored
        locationCount = sharedPreferences.getInt("locationCount", 0);

        // Getting stored zoom level if exists else return 0
        String zoom = sharedPreferences.getString("zoom", "0");

        // If locations are already saved
        if (locationCount != 0) {

            String lat = "";
            String lng = "";

            // Iterating through all the locations stored
            for (int i = 0; i < locationCount; i++) {

                // Getting the latitude of the i-th location
                lat = sharedPreferences.getString("lat" + i, "0");

                // Getting the longitude of the i-th location
                lng = sharedPreferences.getString("lng" + i, "0");

                // Drawing marker on the map
                drawMarker(new LatLng(Double.parseDouble(lat),
                        Double.parseDouble(lng)));

                // Drawing circle on the map
                drawCircle(new LatLng(Double.parseDouble(lat),
                        Double.parseDouble(lng)));
            }

            // Moving CameraPosition to last clicked position
            googleMap.moveCamera(CameraUpdateFactory.newLatLng(new LatLng(
                    Double.parseDouble(lat), Double.parseDouble(lng))));

            // Setting the zoom level in the map on last position is clicked
            googleMap.animateCamera(CameraUpdateFactory.zoomTo(Float
                    .parseFloat(zoom)));
        }

        googleMap.setOnMapClickListener(new OnMapClickListener() {

            public void onMapClick(LatLng point) {

                // Incrementing location count
                locationCount++;

                // Drawing marker on the map
                drawMarker(point);

                // Drawing circle on the map
                drawCircle(point);

                // This intent will call the activity ProximityActivity
                Intent proximityIntent = new Intent(
                        "in.wptrafficanalyzer.activity.proximity");

                // Passing latitude to the PendingActivity
                proximityIntent.putExtra("lat", point.latitude);

                // Passing longitude to the PendingActivity
                proximityIntent.putExtra("lng", point.longitude);

                // Creating a pending intent which will be invoked by
                // LocationManager when the specified region is
                // entered or exited
                pendingIntent = PendingIntent.getActivity(getBaseContext(),
                        0, proximityIntent, Intent.FLAG_ACTIVITY_NEW_TASK);

                // Setting proximity alert
                // The pending intent will be invoked when the device enters
                // or exits the region 20 meters
                // away from the marked point
                // The -1 indicates that, the monitor will not be expired
                locationManager.addProximityAlert(point.latitude,
                        point.longitude, 20, -1, pendingIntent);

                /**
                 * Opening the editor object to write data to
                 * sharedPreferences
                 */
                SharedPreferences.Editor editor = sharedPreferences.edit();

                // Storing the latitude for the i-th location
                editor.putString(
                        "lat" + Integer.toString((locationCount - 1)),
                        Double.toString(point.latitude));

                // Storing the longitude for the i-th location
                editor.putString(
                        "lng" + Integer.toString((locationCount - 1)),
                        Double.toString(point.longitude));

                // Storing the count of locations or marker count
                editor.putInt("locationCount", locationCount);

                /** Storing the zoom level to the shared preferences */
                editor.putString("zoom",
                        Float.toString(googleMap.getCameraPosition().zoom));

                /** Saving the values stored in the shared preferences */
                editor.commit();

                Toast.makeText(getBaseContext(),
                        "Proximity Alert is added", Toast.LENGTH_SHORT)
                        .show();

            }
        });

        googleMap.setOnMapLongClickListener(new OnMapLongClickListener() {

            public void onMapLongClick(LatLng point) {
                Intent proximityIntent = new Intent(
                        "in.wptrafficanalyzer.activity.proximity");

                pendingIntent = PendingIntent.getActivity(getBaseContext(),
                        0, proximityIntent, Intent.FLAG_ACTIVITY_NEW_TASK);

                // Removing the proximity alert
                locationManager.removeProximityAlert(pendingIntent);

                // Removing the marker and circle from the Google Map
                googleMap.clear();

                // Opening the editor object to delete data from
                // sharedPreferences
                SharedPreferences.Editor editor = sharedPreferences.edit();

                // Clearing the editor
                editor.clear();

                // Committing the changes
                editor.commit();

                Toast.makeText(getBaseContext(),
                        "Proximity Alert is removed", Toast.LENGTH_LONG)
                        .show();
            }
        });
    }
}

private void drawCircle(LatLng point) {

    // Instantiating CircleOptions to draw a circle around the marker
    CircleOptions circleOptions = new CircleOptions();

    // Specifying the center of the circle
    circleOptions.center(point);

    // Radius of the circle
    circleOptions.radius(20);

    // Border color of the circle
    circleOptions.strokeColor(Color.BLACK);

    // Fill color of the circle
    circleOptions.fillColor(0x30ff0000);

    // Border width of the circle
    circleOptions.strokeWidth(2);

    // Adding the circle to the GoogleMap
    googleMap.addCircle(circleOptions);

}

private void drawMarker(LatLng point) {
    // Creating an instance of MarkerOptions
    MarkerOptions markerOptions = new MarkerOptions();

    // Setting latitude and longitude for the marker
    markerOptions.position(point);

    // Adding InfoWindow title
    markerOptions.title("Location Coordinates");

    // Adding InfoWindow contents
    markerOptions.snippet(Double.toString(point.latitude) + ","
            + Double.toString(point.longitude));

    // Adding marker on the Google Map
    googleMap.addMarker(markerOptions);
}
}

// activity_main 

<fragment
    android:id="@+id/map"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    class="com.google.android.gms.maps.SupportMapFragment" />

//Manifiest 

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />

<permission
    android:name="in.wptrafficanalyzer.multipleproximitymapv2.permission.MAPS_RECEIVE"
    android:protectionLevel="signature" />

<uses-permission android:name="in.wptrafficanalyzer.multipleproximitymapv2.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" />

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="in.wptrafficanalyzer.multipleproximitymapv2.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>
    <activity
        android:name=".ProximityActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="in.wptrafficanalyzer.activity.proximity" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>
    <activity
        android:name=".NotificationView"
        android:label="@string/app_name" >
        <intent-filter>
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>

    <meta-data
        android:name="com.google.android.maps.v2.API_KEY"
        android:value="AIzaSyD2fSGTakDlROXxr2IJeDH6f31b7BSc0F8" />
</application>




回答2:


Add library to your AndroidManifest File:

  <uses-library
        android:name="com.google.android.maps"
        android:required="true" />



回答3:


Just check this:

package com.example.mymap;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
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);


    FragmentManager myFM = .getSupportFragmentManager();

    SupportMapFragment myMAPF = (SupportMapFragment) myFM
            .findFragmentById(R.id.fragment1);
    MAP = myMAPF.getMap();
    MAP.setMyLocationEnabled(true);
    MAP.setMapType(GoogleMap.MAP_TYPE_HYBRID);
    MAP.setOnMapClickListener(new OnMapClickListener() {
        @Override
        public void onMapClick(LatLng point) {
            // TODO Auto-generated method stub
            MAP.addMarker(new MarkerOptions().position(point).title(
                    point.toString()));
            Log.e("lat", "" + point);
        }
    });

}

}

Your xml file will be:

              <fragment
                android:id="@+id/fragment1"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:layout_below="@+id/fragment1"
                android:layout_centerHorizontal="true"
                class="com.google.android.gms.maps.SupportMapFragment" />

And finally add libray in manifest file:

 <uses-library
    android:name="com.google.android.maps"
    android:required="true" />



回答4:


You should use SupportFragment Your min sdk is 8. 

<fragment
class="com.google.android.gms.maps.SupportMapFragment"
android:id="@+id/map"  
android:layout_width="match_parent"
android:layout_height="match_parent"/>

Your activity must extend FragmentActivity

Import

import android.support.v4.app.FragmentActivity;  
import com.google.android.gms.maps.SupportMapFragment;

Edit:

From your comments you say there is a error @

    import com.google.android.gms.maps.SupportMapFragment;

So i guess you have not referenced google play services library project properly.

Download the Google Play services. Goto Windows. Goto Android Sdk Manager. Choose Google play services under extras.

Copy the google-play services_lib library project to your workspace. The library project can be found under the following path.

     <android-sdk-folder>/extras/google/google_play_services/libproject/google-play-services_lib library project .

Import the library project to your eclipse

Click File > Import, select Android > Existing Android Code into Workspace, and browse the workspace import the library project. You can check if it is library project. Right click on the library project. Goto properties. Click Android on the left panel. You will see Is Library checked.




回答5:


Try this.

In your xml file

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/map"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      class="com.google.android.gms.maps.SupportMapFragment"/>

In the java file

public class MapExampleActivity extends FragmentActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_map_example);

    //setUpMap
}



回答6:


I've faced many error when work with google map API V2. You can check these setting which solved my problem.



来源：https://stackoverflow.com/questions/17469661/google-mapfragment-not-working-in-android

标签
android
google-maps
mapfragment
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