从9.0.1升级到Google Play服务9.4.0后,在.getMap()上获取错误;如果我这样做,则Google Play服务9.0.1返回。我的应用程序在启动时崩溃了...请大家帮我..我现在可以做...提前谢谢...
public class MapsActivity extends FragmentActivity {
private GoogleMap mMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
if (mMap == null) {
MapFragment mapFragment = (MapFragment) getFragmentManager()
.findFragmentById(R.id.map);
mMap = mapFragment.getMap();
if (mMap != null) {
new MarkerTask().execute();
}
}
}
private class MarkerTask extends AsyncTask<Void, Void, String> {
private static final String LOG_TAG = "ExampleApp";
private static final String SERVICE_URL = "http://www.xxxxxxx.com/bar/mob/map.php?city=&location=";
// Invoked by execute() method of this object
@Override
protected String doInBackground(Void... args) {
HttpURLConnection conn = null;
final StringBuilder json = new StringBuilder();
try {
// Connect to the web service
URL url = new URL(SERVICE_URL);
conn = (HttpURLConnection) url.openConnection();
InputStreamReader in = new InputStreamReader(conn.getInputStream());
// Read the JSON data into the StringBuilder
int read;
char[] buff = new char[1024];
while ((read = in.read(buff)) != -1) {
json.append(buff, 0, read);
}
} catch (IOException e) {
Log.e(LOG_TAG, "Error connecting to service", e);
//throw new IOException("Error connecting to service", e); //uncaught
} finally {
if (conn != null) {
conn.disconnect();
}
}
return json.toString();
}
// Executed after the complete execution of doInBackground() method
@Override
protected void onPostExecute(String json) {
try {
// De-serialize the JSON string into an array of city objects
JSONArray jsonArray = new JSONArray(json);
System.out.println("Returned value " + jsonArray.toString());
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObj = jsonArray.getJSONObject(i);
LatLng latLng = new LatLng(jsonObj.getJSONArray("latlng").getDouble(0),
jsonObj.getJSONArray("latlng").getDouble(1));
//move CameraPosition on first result
if (i == 0) {
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(latLng).zoom(13).build();
mMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
}
// Create a marker for each city in the JSON data.
mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_BLUE))
.title(jsonObj.getString("barname"))
.snippet(jsonObj.getString("address"))
.position(latLng));
}
} catch (JSONException e) {
Log.e(LOG_TAG, "Error processing JSON", e);
}
}
}}
最佳答案
自2014年12月起不推荐使用MapFragment.getMap(),并且随着2016年6月27日新版本的发布,getMap()已被删除。现在,好的(唯一)方法是使用getMapAsync()。
有关更多详细信息,请参见Maps Android API Release Notes:
Google Play服务SDK中不再提供以前不推荐使用的getMap()函数。 (仍可从提供给Android设备的Google Play服务APK中获得该功能。)自2014年12月起,不赞成使用getMap()函数。有关将getMap()转换为getMapAsync()的帮助,请参见发布博客。
您可以看一下Actual guide for using MapFragment
如果您在从getMap()切换到getMapAsync()时遇到问题,也可以查看Geo Developers Blog。
关于java - 从9.0.1升级到Google Play服务9.4.0后,.getMap()出现错误;,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/38915645/