在姜饼中未调用onLocationChanged

Question

我有个秘密要告诉你！我可以让下面的代码在我的三星Galaxy测试手机上工作，它运行的是2.2 (Froyo)。它不能在我的HTC Thunderbolt测试手机上工作，它运行的是2.3.4 (姜饼)。这就像收集位置信息一样简单，但我也实现了解释here的最佳实践，并得到了相同的结果: Froyo is go，Gingerbread is dead。

为了解决这个问题，我应该做些什么呢？是我的代码吗？是硬件还是软件？权限？我激怒了计算机科学之神吗？我会接受第一个答案，并给出一个导致解决方案的建议。谢谢你的帮助！

我的活动：

import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

public class SimpleLocationProjectActivity extends Activity {

    private LocationManager mLocationManager;
    private MyLocationListener mLocationListener;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        mLocationListener = new MyLocationListener();

    }

    @Override
    protected void onPause() {
        mLocationManager.removeUpdates(mLocationListener);
        super.onPause();
    }

    @Override
    protected void onResume() {
        super.onResume();
        Log.i("SIMPLE APP", "Starting location services.");
        List<String> providers = mLocationManager.getAllProviders();
        for (int i = 0 ; i < providers.size(); i++){
            mLocationManager.requestLocationUpdates(providers.get(i), 1, 1, mLocationListener);
        }

    }

    public class MyLocationListener implements LocationListener{

        @Override
        public void onStatusChanged(String provider, int status,
                Bundle extras) {
            String statusStr;
            switch (status){
            case LocationProvider.OUT_OF_SERVICE:
                statusStr = "Out of Service";
                break;
            case LocationProvider.TEMPORARILY_UNAVAILABLE:
                statusStr = "Temporarily unavailable";
                break;
            case LocationProvider.AVAILABLE:
                statusStr = "Available";
                break;
            default:
                statusStr = "Huhhh??";  
            }
            Log.i("SIMPLE APP", "Provider:  " + provider + "   Status is:  " + statusStr);


        }

        @Override
        public void onProviderEnabled(String provider) {
            Log.i("SIMPLE APP", "Provider:  " + provider + " is enabled.");
        }

        @Override
        public void onProviderDisabled(String provider) {
            Log.i("SIMPLE APP", "Provider:  " + provider + " is disabled.");
        }

        @Override
        public void onLocationChanged(Location location) {
            double latitute = location.getLatitude();
            double longitude = location.getLongitude();
            Toast.makeText(SimpleLocationProjectActivity.this, "Lat is " + latitute + "  and lng is " + longitude, Toast.LENGTH_SHORT).show();

            //This never gets called on my HTC Thunderbolt...
            Log.i("SIMPLE APP", "Provider:  " + location.getProvider() + "   Lat is " + latitute + "  and lng is " + longitude);
        }
    }
}

我的宣言：

<?xml version="1.0" encoding="UTF-8"?>
<manifest android:versionCode="1" android:versionName="1.0"
    package="com.silithcrowe.simplelocationproject" xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.INTERNET"/>

    <uses-sdk android:minSdkVersion="8"/>
    <application android:icon="@drawable/ic_launcher" android:label="@string/app_name">
        <activity android:label="@string/app_name" android:name=".SimpleLocationProjectActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

编辑:运行时的logcat示例：

03-01 11:37:43.529: D/RPC(1662): read RPC packet
03-01 11:37:43.529: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:43.529: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:43.529: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:43.529: D/RPC(1662): read RPC packet
03-01 11:37:43.529: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:43.529: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:43.529: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:43.529: D/RPC(1662): read RPC packet
03-01 11:37:43.529: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:43.529: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:43.529: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:43.529: D/RPC(1662): read RPC packet
03-01 11:37:43.529: D/RPC(1662): read RPC packet size: [96]
03-01 11:37:43.529: V/locapi_rpc_glue(1662): Callback received: 2 (cb_id=0x67E0001 handle=2)
03-01 11:37:43.529: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:43.529: D/RPC(1662): read RPC packet
03-01 11:37:43.529: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:43.529: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:43.529: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:43.539: D/RPC(1662): read RPC packet
03-01 11:37:43.539: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:43.539: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:43.539: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:43.539: D/RPC(1662): read RPC packet
03-01 11:37:43.539: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:43.539: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:43.539: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:43.539: D/RPC(1662): read RPC packet
03-01 11:37:43.539: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:43.539: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:43.539: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:43.559: D/lib_locapi(1662): loc_eng_report_sv: valid_mask = 0x30, num of sv = 0
03-01 11:37:43.559: D/GpsLocationProvider(1662): reportSvStatus
03-01 11:37:44.410: D/RPC(1662): read RPC packet
03-01 11:37:44.410: D/RPC(1662): read RPC packet size: [208]
03-01 11:37:44.410: V/locapi_rpc_glue(1662): Callback received: 1 (cb_id=0x67E0001 handle=2)
03-01 11:37:44.410: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:44.410: D/lib_locapi(1662): loc_eng_report_position: valid mask = 0x61ed, sess status = 1
03-01 11:37:44.520: D/RPC(1662): read RPC packet
03-01 11:37:44.520: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:44.520: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:44.520: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:44.520: D/RPC(1662): read RPC packet
03-01 11:37:44.520: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:44.520: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:44.520: D/RPC(1662): written RPC packet size: [28]
03-01 11:37:44.520: D/RPC(1662): read RPC packet
03-01 11:37:44.520: D/RPC(1662): read RPC packet size: [272]
03-01 11:37:44.520: V/locapi_rpc_glue(1662): Callback received: 4 (cb_id=0x67E0001 handle=2)
03-01 11:37:44.520: D/RPC(1662): written RPC packet size: [28]

请求位置更新时的logcat示例：

I/SIMPLE APP(12524): Starting location services.
D/AK8975  ( 1544): Ignore M_Sensor: (y, p, r) = ( 293,    1,    2), Status = 2
D/GpsLocationProvider( 1662): [handleMessage] message :8
D/GpsLocationProvider( 1662): [handleMessage] ADD_LISTENER
D/GpsLocationProvider( 1662): addListener(com.seedlabs.simplelocationproject)
D/GpsLocationProvider( 1662): setMinTime 0
V/GpsLocationProvider( 1662): enableLocationTracking ++
D/GpsLocationProvider( 1662): [handleMessage] message :3
D/GpsLocationProvider( 1662): [handleMessage] ENABLE_TRACKING
D/GpsLocationProvider( 1662): startNavigating
D/GpsLocationProvider( 1662): HtcBuildFlag.HtcCIQFlag(FALSE)
V/LocationManagerService( 1662): requestLocationUpdates
V/LocationManagerService( 1662): requestLocationUpdatesLocked: updateProvidersLocked
D/LocationManagerService( 1662): [updateProvidersLocked]
V/LocationManagerService( 1662): requestLocationUpdates
V/LocationManagerService( 1662): requestLocationUpdatesLocked: updateProvidersLocked
D/LocationManagerService( 1662): [updateProvidersLocked]
V/LocationManagerService( 1662): requestLocationUpdates
V/LocationManagerService( 1662): requestLocationUpdatesLocked: updateProvidersLocked
D/LocationManagerService( 1662): [updateProvidersLocked]
D/lib_locapi( 1662): [GPS:] loc_eng_set_qos_time_out(standalone = 16000, agps = 16000)
V/GpsLocationProvider( 1662): set_agps_qos_time_out complete
D/GpsLocationProvider( 1662): GpsLocationProvider_set_position_mode
D/lib_locapi( 1662): [GPS:] loc_eng_set_position mode, client = 2, interval = 1000, mode = 0
D/lib_locapi( 1662): [GPS:] loc_eng_set_position mode: GPS_POSITION_MODE_STANDALONE
D/lib_locapi( 1662): [GPS:] loc_eng_set_position mode before IOCTL, interval=1000, mode =4 preferred_accuracy=50, qos_timeout_standalone=16000, recurrence_type=1
V/lib_locapi( 1662): loc_eng_ioctl called: client = 2, ioctl_type = 2
V/locapi_rpc_glue( 1662): loc_ioctl
D/RPC     ( 1662): written RPC packet size: [96]

Answer 1

尝试在onCreate()函数中重用此代码，

List<String> providers = mLocationManager.getAllProviders();
        for (int i = 0 ; i < providers.size(); i++){
            mLocationManager.requestLocationUpdates(providers.get(i), 1, 1, mLocationListener);
        }

Answer 2

你是边走边测试，还是坐在你的开发机器前，用USB连接logcat输出？我怀疑2.3.4对第二个和第三个参数更加严格：

requestLocationUpdates(providers.get(i), 1, 1, mLocationListener)

这些参数限制了硬件生成更新的速度。你目前使用的是只在位置变化超过一米时才给我更新，而且不会超过每秒一次。

从Location Manager docs

如果minDistance大于0，则仅当设备按minDistance米移动时才会广播位置。要尽可能频繁地获取通知，请将这两个参数都设置为0。

试试这个，看看是否会有所不同。如果没有，请发布您的logcat输出以获取更多想法。

requestLocationUpdates(providers.get(i), 0, 0, mLocationListener)

Answer 3

我在我的安卓平板电脑上也遇到了同样的问题，直到我意识到我还没有启用谷歌定位服务。我一这样做，onLocationChanged就开始根据我所连接的WiFi网络向我提供更新。查看此help document了解如何启用它(在大多数安卓设备上设置->位置)。