不调用onLocationChange

Question

永远不会调用onLocationChanged方法。我从早上开始尝试但是没有用。 :( 在这个问题上等待你的帮助。 有人可以帮帮我吗？

这是我的主要活动

package com.example.gmap;//packagename

public class MainActivity extends FragmentActivity{

    TextView tv;

    GoogleMap map;
    private Marker marker;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity);
        map=((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
        map.setMyLocationEnabled(true);
        map.setMapType(GoogleMap.MAP_TYPE_HYBRID);

        Criteria criteria = new Criteria();//???
        criteria.setAccuracy(Criteria.ACCURACY_FINE);
        LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        String provider = manager.getBestProvider(criteria, false);
        LocationListener listener = new LocationListener() {

            @Override
            public void onStatusChanged(String provider, int status, Bundle extras) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onProviderEnabled(String provider) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onProviderDisabled(String provider) {
                // TODO Auto-generated method stub

            }

            @Override
            public void onLocationChanged(Location location) {
                // TODO Auto-generated method stub
                tv.setText(String.valueOf(location.getLatitude()));
                Log.w("control", "enter");
            }
        };

        manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener);


    }


}

这是我的manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.gmap"
    android:versionCode="1"
    android:versionName="1.0" >

<uses-permission android:name="android.permission.ACCESS_GPS" />
<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"/>
<!-- The following two permissions are not required to use
     Google Maps Android API v2, but are recommended. -->
<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-sdk
        android:minSdkVersion="9"
        android:targetSdkVersion="17" />


    <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.gms.version"
    android:value="@integer/google_play_services_version" />
        <activity
            android:name="com.example.gmap.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="Mykey"/>

    </application>

</manifest>