初始化谷歌地图后重绘片段视图 - 机器人 [英] Redraw Fragment in View after initialising Google Map - Android
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问题描述
我想对我的资料查看半个屏幕上显示一个谷歌地图。在我的的onCreate 方法，我创建了一个新实例的的AsyncTask 通过JSON检索经度和纬度，从谷歌服务器。接收结果后，我呼吁：
GoogMapHandler GMH =新GoogMapHandler（fragmentManager，的applicationContext）;
gmh.initilizeMap（坐标，用户名，AddressInfo的）;
下面是我的 GoogMapHandler 类：
进口android.support.v4.app.Fragment;
进口android.support.v4.app.FragmentTransaction;
进口android.content.Context;
进口android.widget.Toast;
进口android.support.v4.app.FragmentManager;
进口android.util.Log;
进口com.google.android.gms.internal.fm;
进口com.google.android.gms.maps.CameraUpdateFactory;
进口com.google.android.gms.maps.GoogleMap;
进口com.google.android.gms.maps.SupportMapFragment;
进口com.google.android.gms.maps.model.LatLng;
进口com.google.android.gms.maps.model.Marker;
进口com.google.android.gms.maps.model.MarkerOptions;
公共类GoogMapHandler {
// 谷歌地图
私人GoogleMap的GoogleMap的;
私人android.support.v4.app.FragmentManager fragmentManager;
民营背景的applicationContext;
公共GoogMapHandler（FragmentManager fmanager，上下文的applicationContext）{
this.fragmentManager = fmanager;
this.applicationContext =的applicationContext;
}
公共无效initilizeMap（经纬度坐标，字符串username，字符串addrinfo中）{
如果（GoogleMap的== NULL）{
片段片段= this.fragmentManager.findFragmentById（R.id.map）;
FragmentTransaction fragTransaction = this.fragmentManager
.beginTransaction（）;
fragTransaction.detach（片段）;
SupportMapFragment supportmapfragment =（SupportMapFragment）片段;
GoogleMap的= supportmapfragment.getMap（）;
如果（GoogleMap的== NULL）{
Toast.makeText（ApplicationContext一
对不起！无法创建映射。Toast.LENGTH_SHORT）
。显示（）;
} 其他 {
标记LOC = googleMap.addMarker（新MarkerOptions（）
.position（坐标）.title伪（用户：+用户名）
是.snippet（addrinfo中））;
googleMap.moveCamera（CameraUpdateFactory.newLatLngZoom（坐标，
15））;
fragTransaction.attach（片段）;
fragTransaction.commit（）;
}
}
}
}
现在的问题是，我不能看地图，虽然我没有得到任何错误。当查看已经创建，我试图以重绘的片段显示在地图上，但它不工作。
我怎样才能做到这一点？
任何帮助将是很大的AP preciated。
编辑：
下面是我的 ProfileActivity 。正如所建议的，我用 onResume 创建的AsyncTask 。
公共类ProfileActivity扩展BaseActivity {
私人字符串的用户名，地址，邮寄code，国家;
@覆盖
保护无效onResume（）{
Log.i（URL，
http://maps.googleapis.com/maps/api/geo$c$c/json?address=
+ address.replaceAll（\\ S +，+）+++邮政code
+++国家+＆放大器，传感器=假）;
新LocationTask（getSupportFragmentManager（）
getApplicationContext（））
.execute（http://maps.googleapis.com/maps/api/geo$c$c/json?address=
+ address.replaceAll（\\ S +，+）
++
+邮政code
+++国家+＆放大器，传感器=假）;
super.onResume（）;
}
@覆盖
保护无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_profile）;
意向意图= getIntent（）;
用户名= intent.getStringExtra（SearchResultsActivity.USERNAME）;
如果（用户名！= NULL）{
的setTitle（用户：+用户名）;
}
地址= intent.getStringExtra（SearchResultsActivity.ADDRESS）;
邮政code =意图
.getStringExtra（SearchResultsActivity.POSTAL code）;
国家= intent.getStringExtra（SearchResultsActivity.COUNTRY）;
TextView中的TextView =新的TextView（本）;
textView.setTextSize（40）;
textView.setText（用户名）;
的setContentView（TextView的）;
}
}
纵断面布局：
＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=http://schemas.android.com/apk/res/android
机器人：layout_width =FILL_PARENT
机器人：layout_height =FILL_PARENT
机器人：方向=垂直＆GT;
＆LT;的FrameLayout
机器人：ID =@ + ID / map_frame
机器人：layout_width =FILL_PARENT
机器人：layout_height =WRAP_CONTENT
机器人：layout_weight =1.2＆GT;
＆LT;片段
机器人：ID =@ + ID /图
机器人：名称=com.google.android.gms.maps.MapFragment
机器人：layout_width =FILL_PARENT
机器人：layout_height =match_parent
类=com.google.android.gms.maps.SupportMapFragment/＆GT;
＆LT; /的FrameLayout＆GT;
＆LT;的TextView
机器人：ID =@ + ID / TextView的
机器人：layout_width =FILL_PARENT
机器人：layout_height =FILL_PARENT
机器人：layout_weight =1
机器人：文本=TextView的/＆GT;
＆LT; / LinearLayout中＆GT;
位置任务：
公共类LocationTask扩展
AsyncTask的＆LT;字符串，字符串，StringBuilder的＆GT; {
私人的EditText地址= NULL;
私人邮政的EditText code = NULL;
私人的EditText国家= NULL;
民营背景的applicationContext;
私人FragmentManager fragmentManager;
私人经纬度坐标;
公共LocationTask（FragmentManager fmanager，
上下文的applicationContext）{
this.fragmentManager = fmanager;
this.applicationContext =的applicationContext;
}
@覆盖
受保护的StringBuilder doInBackground（字符串... PARAMS）{
HTTPGET HTTPGET =新HTTPGET（PARAMS [0]）;
HttpClient的客户端=新DefaultHttpClient（）;
HTT presponse响应;
尝试 {
响应= client.execute（HTTPGET）;
StringBuilder的StringBuilder的=新的StringBuilder（）;
尝试 {
HttpEntity实体= response.getEntity（）;
InputStream的流= entity.getContent（）;
INT B：
而（（二= stream.read（））！= - 1）{
stringBuilder.append（（char）的B）;
}
}赶上（ClientProtocolException E）{
e.printStackTrace（）;
}赶上（IOException异常E）{
e.printStackTrace（）;
}
返回StringBuilder的;
}赶上（ClientProtocolException E）{
e.printStackTrace（）;
}赶上（IOException异常E）{
e.printStackTrace（）;
}
返回null;
}
@覆盖
保护无效onPostExecute（StringBuilder的结果）{
的JSONObject的JSONObject =新的JSONObject（）;
尝试 {
的JSONObject =新的JSONObject（result.toString（））;
}赶上（JSONException E）{
e.printStackTrace（）;
}
字符串postal_ code = NULL;
字符串street_address = NULL;
字符串全国= NULL;
尝试 {
字符串状态= jsonObject.getString（身份）的toString（）。
如果（status.equalsIgnoreCase（OK））{
JSONArray结果= jsonObject.getJSONArray（结果）;
的JSONObject R = results.getJSONObject（0）;
JSONArray addressComponentsArray = R
.getJSONArray（address_components）;
JSONObject的几何= r.getJSONObject（几何）;
JSONObject的locationObj = geometry.getJSONObject（位置）;
坐标=新的经纬度（locationObj.getDouble（土地增值税），locationObj.getDouble（LNG））;
}
}赶上（JSONException E）{
e.printStackTrace（）;
}
GoogMapHandler GMH =新GoogMapHandler（fragmentManager，的applicationContext）;
gmh.initilizeMap（坐标，用户名，AddressInfo的）;
}
}
解决方案
我忘了删除这在我的 ProfileActivity ：
的TextView TextView的=新的TextView（本）;
textView.setTextSize（40）;
textView.setText（用户名）;
的setContentView（TextView的）;
删除它，解决我的问题。
I want to display a Google Map on half screen of my profile view. In my onCreate method I created a new instance of an AsyncTask to retrieve latitude and longitude from Google servers via JSON. After receiving the result, I call:
GoogMapHandler gmh = new GoogMapHandler(fragmentManager, applicationContext);
gmh.initilizeMap(coord, "Username", "addressInfo");
Here is my GoogMapHandler class:
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.content.Context;
import android.widget.Toast;
import android.support.v4.app.FragmentManager;
import android.util.Log;
import com.google.android.gms.internal.fm;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
public class GoogMapHandler {
// Google Map
private GoogleMap googleMap;
private android.support.v4.app.FragmentManager fragmentManager;
private Context applicationContext;
public GoogMapHandler(FragmentManager fmanager, Context applicationContext) {
this.fragmentManager = fmanager;
this.applicationContext = applicationContext;
}
public void initilizeMap(LatLng coord, String username, String addrInfo) {
if (googleMap == null) {
Fragment fragment = this.fragmentManager.findFragmentById(R.id.map);
FragmentTransaction fragTransaction = this.fragmentManager
.beginTransaction();
fragTransaction.detach(fragment);
SupportMapFragment supportmapfragment = (SupportMapFragment) fragment;
googleMap = supportmapfragment.getMap();
if (googleMap == null) {
Toast.makeText(applicationContext,
"Sorry! Unable to create map.", Toast.LENGTH_SHORT)
.show();
} else {
Marker loc = googleMap.addMarker(new MarkerOptions()
.position(coord).title("User: " + username)
.snippet(addrInfo));
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(coord,
15));
fragTransaction.attach(fragment);
fragTransaction.commit();
}
}
}
}
Now the problem is, that I can't see the map, although I get no errors. As the View is already created, I tried to to "redraw" the fragment to display the map, but it's not working.
How can I achieve this?
Any help would be greatly appreciated.
EDIT:
Here is my ProfileActivity. As suggested, I used onResume to create the AsyncTask.
public class ProfileActivity extends BaseActivity {
private String username, address, postalCode, country;
@Override
protected void onResume() {
Log.i("URL",
"http://maps.googleapis.com/maps/api/geocode/json?address="
+ address.replaceAll("\\s+", "+") + ",+" + postalCode
+ ",+" + country + "&sensor=false");
new LocationTask(getSupportFragmentManager(),
getApplicationContext())
.execute("http://maps.googleapis.com/maps/api/geocode/json?address="
+ address.replaceAll("\\s+", "+")
+ ",+"
+ postalCode
+ ",+" + country + "&sensor=false");
super.onResume();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
Intent intent = getIntent();
username = intent.getStringExtra(SearchResultsActivity.USERNAME);
if (username != null) {
setTitle("User: " + username);
}
address = intent.getStringExtra(SearchResultsActivity.ADDRESS);
postalCode = intent
.getStringExtra(SearchResultsActivity.POSTALCODE);
country = intent.getStringExtra(SearchResultsActivity.COUNTRY);
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(username);
setContentView(textView);
}
}
Profile Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<FrameLayout
android:id="@+id/map_frame"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1.2" >
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="fill_parent"
android:layout_height="match_parent"
class="com.google.android.gms.maps.SupportMapFragment" />
</FrameLayout>
<TextView
android:id="@+id/textView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:text="TextView" />
</LinearLayout>
Location Task:
public class LocationTask extends
AsyncTask<String, String, StringBuilder> {
private EditText address = null;
private EditText postalCode = null;
private EditText country = null;
private Context applicationContext;
private FragmentManager fragmentManager;
private LatLng coord;
public LocationTask(FragmentManager fmanager,
Context applicationContext) {
this.fragmentManager = fmanager;
this.applicationContext = applicationContext;
}
@Override
protected StringBuilder doInBackground(String... params) {
HttpGet httpGet = new HttpGet(params[0]);
HttpClient client = new DefaultHttpClient();
HttpResponse response;
try {
response = client.execute(httpGet);
StringBuilder stringBuilder = new StringBuilder();
try {
HttpEntity entity = response.getEntity();
InputStream stream = entity.getContent();
int b;
while ((b = stream.read()) != -1) {
stringBuilder.append((char) b);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return stringBuilder;
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(StringBuilder result) {
JSONObject jsonObject = new JSONObject();
try {
jsonObject = new JSONObject(result.toString());
} catch (JSONException e) {
e.printStackTrace();
}
String postal_code = null;
String street_address = null;
String country = null;
try {
String status = jsonObject.getString("status").toString();
if (status.equalsIgnoreCase("OK")) {
JSONArray results = jsonObject.getJSONArray("results");
JSONObject r = results.getJSONObject(0);
JSONArray addressComponentsArray = r
.getJSONArray("address_components");
JSONObject geometry = r.getJSONObject("geometry");
JSONObject locationObj = geometry.getJSONObject("location");
coord = new LatLng(locationObj.getDouble("lat"), locationObj.getDouble("lng"));
}
} catch (JSONException e) {
e.printStackTrace();
}
GoogMapHandler gmh = new GoogMapHandler(fragmentManager, applicationContext);
gmh.initilizeMap(coord, "Username", "addressInfo");
}
}
解决方案
I forgot to remove this in my ProfileActivity:
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(username);
setContentView(textView);
Removing it, solved my problem.
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