【发布时间】:2016-01-25 07:36:24
【问题描述】:
我需要在 React-native Android 上检测用户的地理位置,但当前的实现只支持 iOS。我在任何地方都没有找到任何教程或相关问题。
我已经尝试为此创建自己的 Android 原生组件。我已经用模拟器(通过命令行设置一些坐标)和手机进行了尝试,但操作栏中没有 gps 图标,并且反应回调中没有数据。
我正在尝试立即获取最后一个已知位置,并且我还设置了一个事件侦听器以进行更新。
public class GeoLocation extends ReactContextBaseJavaModule implements
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
protected static final String TAG = "GeoLocation";
protected GoogleApiClient mGoogleApiClient;
protected Location mLastLocation;
public GeoLocation(ReactApplicationContext reactContext) {
super(reactContext);
buildGoogleApiClient();
}
@Override
public String getName() {
return "GeoLocation";
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(getReactApplicationContext())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
@Override
public void onConnected(Bundle connectionHint) {
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
//WritableMap params = Arguments.createMap();
//Can I use ConcurrentHashMap instead of WritableMap?
ConcurrentHashMap<String, String> params = new ConcurrentHashMap();
params.put("lastLocation", mLastLocation.toString());
sendEvent(getReactApplicationContext(), "geoCoordsChanged", params);
}
@Override
public void onConnectionFailed(ConnectionResult result) {
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + result.getErrorCode());
}
@Override
public void onConnectionSuspended(int cause) {
mGoogleApiClient.connect();
}
@ReactMethod
public void getLastLocation(Callback success,Callback err){
try {
String msg = "No location found yet";
if(mLastLocation != null){
msg = mLastLocation.toString();
}
success.invoke(msg);
} catch (Exception e) {
err.invoke(e.getMessage());
}
}
private void sendEvent(ReactContext reactContext,
String eventName,
@Nullable ConcurrentHashMap<String, String> params) {
try {
reactContext
.getJSModule(DeviceEventManagerModule.RCTDeviceEventEmitter.class)
.emit(eventName, params);
} catch(Exception e){
}
}
权限:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.SEND_SMS"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<application
android:allowBackup="true"
android:label="@string/app_name"
android:icon="@mipmap/ic_launcher"
android:theme="@style/AppTheme">
<meta-data android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
我也没有从 logcat 日志中找到任何相关内容。任何提示此代码有什么问题或任何获取地理坐标的解决方案都会很棒!
【问题讨论】:
标签: android geolocation react-native