我正在使用融合位置 API 在回收视图适配器中查找当前位置，适配器由片段类使用
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【中文标题】我正在使用融合位置 API 在回收视图适配器中查找当前位置，适配器由片段类使用【英文标题】：I am using fused location API to find current location in recycle view adapter, adapter is used by a fragment class 【发布时间】：2016-05-23 05:27:58 【问题描述】：我正在那里制作一个项目，我正在使用融合位置 API 在回收视图适配器中查找当前位置。
适配器由片段类使用，我想知道如何在适配器卡视图中访问我的融合位置活动类 lang 和 lat。
我搜索了很多，但我没有找到任何合适的答案，我是 android 新手，请帮忙
这是我的tasklistadapter 类或回收视图适配器
public class TaskListAdapter extends RecyclerView.Adapter<TaskListAdapter.ViewHolder>
String setdata;
LocationActivity mlocationAct;
Context mContext;
private class User
public String name;
public String party;
public String city;
public String country;
public String identity;
public int image;
public int imagePrty;
public User(int image, int imageParty, String name, String city, String party, String country,String identity)
this.image = image;
this.imagePrty = imageParty;
this.identity = identity;
this.name = name;
this.city = city;
this.party = party;
this.country = country;
private ArrayList<User> mRecyclerData;
public TaskListAdapter(Context mContext)
mRecyclerData = new ArrayList<>();
mContext = mContext.getApplicationContext();
mlocationAct = new LocationActivity(mContext);
// 虚拟数据
mRecyclerData.add(new User(R.drawable.mp,R.drawable.bjplogo,"D. V. Sadananda Gowda", "MP", "Bjp", "India","MP"));
mRecyclerData.add(new User(R.drawable.mla,R.drawable.congresslogo,"Akhanda Srinivas Murthy R", "MLA", "Congres", "India","MLA"));
@Override
public void onBindViewHolder(final ViewHolder holder, final int i)
final Context context = holder.titleView.getContext();
User user = mRecyclerData.get(i);
holder.titleView.setText(user.name);
//这里我想显示一个来自我的融合位置活动类的数据。
holder.tvState.setText(mlocationAct.getStateName(context));
@Override
public int getItemCount()
return (mRecyclerData != null) ? mRecyclerData.size() : 0;
static class ViewHolder extends RecyclerView.ViewHolder
RadioGroup radioGroup;
CardView cardView;
String setdata;
TextView titleView, tvConnect, cityView, countryView, partyView, tvResult,tvAdd,tvState,idProfsn;
ImageView imageView,imagelgo ;
public ViewHolder(CardView card)
super(card);
cardView = card;
titleView = (TextView) card.findViewById(R.id.tvName);
imageView = (ImageView) card.findViewById(R.id.image);
cityView = (TextView) card.findViewById(R.id.tvCity);
countryView = (TextView) card.findViewById(R.id.tvCountry);
partyView = (TextView) card.findViewById(R.id.tvParty);
tvConnect = (TextView) card.findViewById(R.id.tvConnect);
radioGroup = (RadioGroup) card.findViewById(R.id.radioG);
tvResult = (TextView) card.findViewById(R.id.tvResult);
tvAdd=(TextView)card.findViewById(R.id.tvAdd);
tvState=(TextView)card.findViewById(R.id.tvState);
idProfsn=(TextView)card.findViewById(R.id.tvId);
imagelgo=(ImageView)card.findViewById(R.id.imageLogo);
这是我使用这个适配器的片段类
public class FragmentA extends Fragment
private static final String TAG = "LocationActivity";
private static final long INTERVAL = 1000 * 10;
private static final long FASTEST_INTERVAL = 1000 * 5;
Button btnFusedLocation;
TextView tvLocation;
GoogleApiClient mGoogleApiClient;
String mLastUpdateTime;
RecyclerView recyclerView;
TaskListAdapter taskListAdapter;
Context mContext;
private List<Data> mData = new ArrayList<>();
public FragmentA()
// Required empty public constructor
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
mContext = getActivity();
taskListAdapter = new TaskListAdapter(mContext);
LocationActivity locationActivity = new LocationActivity(mContext);
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState)
// Inflate the layout for this fragment
final View v = inflater.inflate(R.layout.fragment_a, container, false);
recyclerView = (RecyclerView) v.findViewById(R.id.recycler);
recyclerView.setAdapter(taskListAdapter);
recyclerView.setHasFixedSize(true);
final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(linearLayoutManager);
return v;
最后这是我的融合定位活动类
public class LocationActivity extends Activity implements LocationListener,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener
double latitude;
double longitude;
private static final String TAG = "LocationActivity";
private static final long INTERVAL = 1000 * 10;
private static final long FASTEST_INTERVAL = 1000 * 5;
Button btnFusedLocation;
TextView tvLocation;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mCurrentLocation;
String mLastUpdateTime;
String lat;
Context mContext;
public LocationActivity(Context mContext)
this.mContext = mContext;
updateUI();
protected void createLocationRequest()
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
Log.d(TAG, "onCreate ...............................");
//show error dialog if GoolglePlayServices not available
if (!isGooglePlayServicesAvailable())
finish();
createLocationRequest();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
setContentView(R.layout.activity_main);
// tvLocation = (TextView) findViewById(R.id.tvLocation);
// btnFusedLocation = (Button) findViewById(R.id.btnShowLocation);
btnFusedLocation.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View arg0)
updateUI();
);
@Override
public void onStart()
super.onStart();
Log.d(TAG, "onStart fired ..............");
mGoogleApiClient.connect();
@Override
public void onStop()
super.onStop();
Log.d(TAG, "onStop fired ..............");
mGoogleApiClient.disconnect();
Log.d(TAG, "isConnected ...............: " + mGoogleApiClient.isConnected());
private boolean isGooglePlayServicesAvailable()
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (ConnectionResult.SUCCESS == status)
return true;
else
GooglePlayServicesUtil.getErrorDialog(status, this, 0).show();
return false;
@Override
public void onConnected(Bundle bundle)
Log.d(TAG, "onConnected - isConnected ...............: " + mGoogleApiClient.isConnected());
startLocationUpdates();
protected void startLocationUpdates()
PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
Log.d(TAG, "Location update started ..............: ");
@Override
public void onConnectionSuspended(int i)
@Override
public void onConnectionFailed(ConnectionResult connectionResult)
Log.d(TAG, "Connection failed: " + connectionResult.toString());
@Override
public void onLocationChanged(Location location)
Log.d(TAG, "Firing onLocationChanged..............................................");
mCurrentLocation = location;
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
updateUI();
private void updateUI()
Log.d(TAG, "UI update initiated .............");
if (null != mCurrentLocation)
latitude = mCurrentLocation.getLatitude();
longitude = mCurrentLocation.getLongitude();
tvLocation.setText("At Time: " + mLastUpdateTime + "\n" +
"Latitude: " + latitude + "\n" +
"Longitude: " + longitude+ "\n" +
"Accuracy: " + mCurrentLocation.getAccuracy() + "\n" +
"Provider: " + mCurrentLocation.getProvider());
else
Log.d(TAG, "location is null ...............");
public List<Address> getGeocoderAddress(Context context)
if (mCurrentLocation != null)
Geocoder geocoder = new Geocoder(context, Locale.ENGLISH);
try
List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1);
return addresses;
catch (IOException e)
//e.printStackTrace();
Log.e("Error : Geocoder", "Impossible to connect to Geocoder", e);
return null;
public String getStateName(Context context)
List<Address> addresses = getGeocoderAddress(context);
if (addresses != null && addresses.size() > 0)
Address address = addresses.get(0);
String state = address.getAdminArea();
return state;
else
return null;
public double getLatitude()
if(mCurrentLocation != null)
latitude = mCurrentLocation.getLatitude();
return latitude;
public double getLongitude()
if(mCurrentLocation !=null)
longitude = mCurrentLocation.getLongitude();
return longitude;
@Override
protected void onPause()
super.onPause();
stopLocationUpdates();
protected void stopLocationUpdates()
LocationServices.FusedLocationApi.removeLocationUpdates(
mGoogleApiClient, this);
Log.d(TAG, "Location update stopped .......................");
@Override
public void onResume()
super.onResume();
if (mGoogleApiClient.isConnected())
startLocationUpdates();
Log.d(TAG, "Location update resumed .....................");
【问题讨论】：
【参考方案1】：如果您需要 ViewHolder 中的 Activity 实例，请在此处执行： 在片段中： TaskListAdapter(Fragment fragment)上的TaskListAdapter(mContext)变化
在任务列表适配器中：
public void TaskListAdapter(Fragment fragment)
mActivity = (LocationActivity) fragment.getActivity();
重写方法onCreate ViewHolder，像这样
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType)
View view =
LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.your_layout, viewGroup, false);
rerurn new ViewHolder(view, mActivity);
查看 ViewHolder 更改： 公共 ViewHolder(CardView 卡) on public ViewHolder（CardView 卡片，LocationActivity 活动）
【讨论】：
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