加载Google Map片段时应用崩溃
[英]App crashes when I load Google Map fragment
问题描述
I have a bottom bar on MainActivity which I use to switch between fragments. 
我在MainActivity上有一个底部栏，可用于在片段之间进行切换。 One of these fragments is being used to load Google Maps. 这些片段之一被用来加载Google Maps。 But for some reason, app crashes as soon as I switch to map fragment. 但是由于某种原因，一旦我切换到地图片段，应用就会崩溃。 Here's my code. 这是我的代码。
MainActivity.java MainActivity.java
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
bottomNavigation = (BottomNavigationView)findViewById(R.id.navigation1);
bottomNavigation.inflateMenu(R.menu.menu);
fragmentManager = getSupportFragmentManager();
bottomNavigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
int id = item.getItemId();
switch (id){
case R.id.bb_menu_contact:
fragment = new ContactFragment();
break;
}
final FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.content, fragment).commit();
return true;
}
});
}
ContactFragment.java ContactFragment.java
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import static com.teslaqubitsins.fasih.teslahcm.R.id.map;
/**
* Created by Fasih on 19-Apr-17.
*/
public class ContactFragment extends Fragment implements OnMapReadyCallback{
SupportMapFragment mapFragment;
private GoogleMap mMap;
private ArrayList<Location> array_list;
private Map<Marker, Location> mMarkerHashMap;
public ContactFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getActivity().setContentView(R.layout.fragment_contact);
setupMap();
}
private void setupMap() {
mMarkerHashMap = new HashMap<>();
LocationDataSource mLocationDataSource = new LocationDataSource();
array_list = mLocationDataSource.getList();
mapFragment = (SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById(map);
mapFragment.getMapAsync(this);
for (Location item : array_list) {
String _title = item.getLocation_name();
String _snippet = item.getLocation_address();
LatLng _latLng = new LatLng(item.getLatitude(), item.getLongitude());
MarkerOptions mMarkerOptions = new MarkerOptions();
mMarkerOptions.position(_latLng).title(_title).snippet(_snippet).flat(true);
}
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap=googleMap;
for (Location item : array_list) {
String _title = item.getLocation_name();
String _snippet = item.getLocation_address();
LatLng _latLng = new LatLng(item.getLatitude(), item.getLongitude());
MarkerOptions mMarkerOptions = new MarkerOptions();
mMarkerOptions.position(_latLng).title(_title).snippet(_snippet).flat(true);
Marker marker = mMap.addMarker(mMarkerOptions);
mMarkerHashMap.put(marker, item);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(marker.getPosition())
.zoom(11.0f)
.build();
mMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
mMap.setOnInfoWindowClickListener(new GoogleMap.OnInfoWindowClickListener() {
@Override
public void onInfoWindowClick(Marker marker) {
Intent mIntent = new Intent(getActivity(),
LocationDetailFragment.class);
LocationDetailFragment.LOCATION = mMarkerHashMap.get
(marker);
startActivity(mIntent);
}
});
}
}
}
Location.java Location.java
package com.teslaqubitsins.fasih.teslahcm;
/**
* Created by Fasih on 19-Apr-17.
*/
public class Location {
private String location_name;
private String location_address;
private String location_phone;
private double latitude;
private double longitude;
public String getLocation_name() {
return location_name;
}
public void setLocation_name(String location_name) {
this.location_name = location_name;
}
public String getLocation_address() {
return location_address;
}
public void setLocation_address(String location_address) {
this.location_address = location_address;
}
public String getLocation_phone() {
return location_phone;
}
public void setLocation_phone(String location_phone) {
this.location_phone = location_phone;
}
public double getLatitude() {
return latitude;
}
public void setLatitude(double latitude) {
this.latitude = latitude;
}
public double getLongitude() {
return longitude;
}
public void setLongitude(double longitude) {
this.longitude = longitude;
}
}
LocationDataSource.java LocationDataSource.java
package com.teslaqubitsins.fasih.teslahcm;
import java.util.ArrayList;
/**
* Created by Fasih on 19-Apr-17.
*/
public class LocationDataSource {
public ArrayList<Location> getList() {
ArrayList<Location> array_list = new ArrayList<Location>();
Location location = new Location();
location.setLocation_name("City Campus");
location.setLocation_phone("+92 21 34543280");
location.setLocation_address("Osman & Company P.E.C.H.S., Karachi, Pakistan\n");
location.setLatitude(24.861207);
location.setLongitude(67.0722036);
array_list.add(location);
return array_list;
}
}
activity_main.xml activity_main.xml中
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:background="#ffffff"
android:backgroundTint="#ffffff"
android:layout_height="match_parent"
tools:context="com.teslaqubitsins.fasih.teslahcm.MainActivity">
<FrameLayout
android:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/navigation1"
android:layout_alignParentTop="true">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="@+id/navigation1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:itemBackground="@color/colorPrimary"
android:layout_alignParentBottom="true">
</android.support.design.widget.BottomNavigationView>
</RelativeLayout>
fragment_contact.xml fragment_contact.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.teslaqubitsins.fasih.teslahcm.ContactFragment">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<!-- Action bar -->
<LinearLayout
android:id="@+id/main_layout_map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
</LinearLayout>
</FrameLayout>
And finally 最后
AndroidManifest.xml AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.teslaqubitsins.fasih.teslahcm">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".GreetingActivity"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="@string/title_activity_greeting"
android:theme="@style/FullscreenTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" />
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="here_goes_the_key_that_I_have _obfuscated_on_purpose" />
</application>
</manifest>
KINDLY NOTE THAT THE MAP HAS TO IMPLEMENT MULTIPLE MARKERS. 请注意，该地图必须实现多个标记。 I might be making a small mistake, but I can't get my head around it as I haven't been able to get much sleep these days. 我可能犯了一个小错误，但由于这些天我无法入睡，所以我无法解决这个问题。
Stack trace 堆栈跟踪
--------- beginning of crash 04-23 15:04:05.465 8212-8212/com.teslaqubitsins.fasih.teslahcm E/AndroidRuntime: FATALEXCEPTION: main Process: com.teslaqubitsins.fasih.teslahcm, PID: 8212 java.lang.IllegalArgumentException: No view found for id 0x7f0d008e (com.teslaqubitsins.fasih.teslahcm:id/content) for fragment ContactFragment{7fb058f #0 id=0x7f0d008e} at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1293) at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1528) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1595) at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:758) at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2363) at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2149) at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2103) at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2013) at android.support.v4.app.FragmentManagerImpl$1
[ 04-23 15:04:06.004 1549: 1579 D/ ] HostConnection::get() New Host Connection established 0x8d36fb80, tid 1579 04-2315:04:06.019 1296-1296/?
2 个解决方案
解决方案1
1 2017-04-23 09:51:13
Instance of getSupportFragmentManager() use getChildFragmentManager() . getSupportFragmentManager（）的实例使用getChildFragmentManager（）。
You have to change below line coding. 您必须更改下面的行编码。
mapFragment = (SupportMapFragment) getActivity().getSupportFragmentManager().findFragmentById(map);
解决方案2
1 已采纳 2017-04-23 10:18:38
Override onCreateView() in your Fragment and inflate your layout there. 在您的Fragment中覆盖onCreateView()并在其中填充您的布局。
Remove onCreate() implementation.. also change your setupMap() to use getChildFragmentManager() 删除onCreate()实现。也将您的setupMap()更改为使用getChildFragmentManager()
public class ContactFragment extends Fragment implements OnMapReadyCallback{
SupportMapFragment mapFragment;
private GoogleMap mMap;
private ArrayList<Location> array_list;
private Map<Marker, Location> mMarkerHashMap;
View rootView;
public ContactFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
rootView = inflater.inflate(R.layout.fragment_contact, container, false);
setupMap();
return rootView;
}
private void setupMap() {
mMarkerHashMap = new HashMap<>();
LocationDataSource mLocationDataSource = new LocationDataSource();
array_list = mLocationDataSource.getList();
mapFragment = (SupportMapFragment) this.getChildFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
for (Location item : array_list) {
String _title = item.getLocation_name();
String _snippet = item.getLocation_address();
LatLng _latLng = new LatLng(item.getLatitude(), item.getLongitude());
MarkerOptions mMarkerOptions = new MarkerOptions();
mMarkerOptions.position(_latLng).title(_title).snippet(_snippet).flat(true);
}
}
Also your <meta-data> tag should be inside of <application/> tag 同样，您的<meta-data>标签应位于<application/>标签内
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