GLSurfaceView没有出现过的MapView [英] GLSurfaceView not appearing over MapView
本文介绍了GLSurfaceView没有出现过的MapView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的目标是使用OpenGL ES 2.0和谷歌地图。我想创建因为它们是从A点行驶到B点。我意识到，这可以通过谷歌地图addPolyline画一条线来完成下面的用户应用程序，但我想使用OpenGL，而不是在为了显示重叠路径。我目前收到一个错误这是由于不正确地设置了GLSurfaceView。
My goal is to use OpenGL ES 2.0 with Google Maps. I would like to create an app that follows the user as they are traveling from point A to point B. I realize that this can be done using Google Maps addPolyline to draw a line, but I want to use OpenGL instead in order to show overlap of paths. I'm currently receiving an error which is due to incorrectly setting up the GLSurfaceView.
在GoogleMapsTracker类我的code是如下：
My code in the GoogleMapsTracker class is as follows:
private MapView mapView;
private GoogleMap map;
private GLSurfaceView mGLSurfaceView;
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*/
public static GoogleMapsTracker newInstance() {
GoogleMapsTracker fragment = new GoogleMapsTracker();
fragment.setRetainInstance(true);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mapView = (MapView) getActivity().findViewById(R.id.map);
mGLSurfaceView = new GLSurfaceView(getActivity());
// Check if the system supports OpenGL ES 2.0
final ActivityManager am = (ActivityManager) getActivity().getSystemService(Context.ACTIVITY_SERVICE);
final ConfigurationInfo cInfo = am.getDeviceConfigurationInfo();
final boolean supportsEs2 = cInfo.reqGlEsVersion >= 0x20000;
if(supportsEs2){
// Request an OpenGL ES 2.0 compatible context
mGLSurfaceView.setEGLContextClientVersion(2);
// Set the renderer to out demo renderer, defined below
mGLSurfaceView.setRenderer(new GoogleMapsRenderer(getActivity()));
} else {
// This is where you could create an OpenGL ES1.x compatible
// renderer if you wanted to support both ES 1 and ES 2
Log.d("Does Not Support ES 2.0", "Does NOT Support ES 2.0");
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v;
if(SettingsActivity.mUnits){
v = inflater.inflate(R.layout.google_maps_tracker_metric, container, false);
} else {
v = inflater.inflate(R.layout.google_maps_tracker, container, false);
}
// Gets the MapView from the XML layout and creates it
mapView = (MapView) v.findViewById(R.id.map);
mapView.onCreate(savedInstanceState);
// Gets to GoogleMap from the MapView and does initialization stuff
map = mapView.getMap();
map.getUiSettings().setMyLocationButtonEnabled(true);
map.getUiSettings().setZoomControlsEnabled(true);
map.getUiSettings().setRotateGesturesEnabled(true);
map.setMyLocationEnabled(true);
map.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
// Needs to call MapsInitializer before doing any CameraUpdateFactory calls
MapsInitializer.initialize(this.getActivity());
// Updates the location and zoom of the MapView
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(45.669656, -111.067373), 18);
map.animateCamera(cameraUpdate);
mGLSurfaceView = (GLSurfaceView) v.findViewById(R.id.gl);
mGLSurfaceView.setEGLContextClientVersion(2);
GoogleMapsRenderer renderer = new GoogleMapsRenderer(getActivity());
mGLSurfaceView.setEGLConfigChooser(8, 8, 8, 8, 16, 0);
mGLSurfaceView.setRenderer(renderer);
mGLSurfaceView.getHolder().setFormat(PixelFormat.TRANSLUCENT);
mGLSurfaceView.setRenderMode(GLSurfaceView.RENDERMODE_CONTINUOUSLY);
mGLSurfaceView.setZOrderOnTop(true);
return v;
}
我的XML code：
My XML code:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<!--fragment
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map"
tools:context=".MainActivity" /-->
<com.google.android.gms.maps.MapView android:id="@+id/map"
android:layout_width="fill_parent"
android:layout_height="fill_parent"/>
<android.opengl.GLSurfaceView
android:id="@+id/gl"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="com.example.tracker.GoogleMapsRenderer"/>
</RelativeLayout>
我收到的错误是如下：
The error I'm receiving is as follows:
05-22 11:02:34.854 22996-22996/com.example.tracker E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.tracker, PID: 22996
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.opengl.GLSurfaceView$GLThread.surfaceCreated()' on a null object reference
at android.opengl.GLSurfaceView.surfaceCreated(GLSurfaceView.java:523)
at android.view.SurfaceView.updateWindow(SurfaceView.java:580)
at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:176)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1970)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
我很肯定，我不会加入我的看法在一起正常。如果任何人都可以指出我的错误，并实现该想法，这将是多AP preciated一个更好的方式。
I'm quite certain that I'm not adding my views together properly. If anyone can point out my mistakes and a better way of implementing this idea that would be much appreciated.
推荐答案
我已经找到了解决我的问题。只是不知道是否有这样做的更好的方法。
I have found a solution to my problem. Just not sure if there is a better way of doing it.
基本上，我所做的就是两个视图（MapView类和GLSurfaceView）分成两个不同的片段。然后用一个Activity类来调用两个片段。 XML文件有碎片覆盖相同的区域。下面是我更新code。
Basically, all I did was split up the two views (MapView and GLSurfaceView) into two different Fragments. Then used an Activity class to call the two fragments. The XML file had the fragments cover the same area. Below is my updated code.
GoogleMapsActivity：
GoogleMapsActivity:
public class GoogleMapsActivity extends FragmentActivity {
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
final Context context = this;
return super.onOptionsItemSelected(item);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTheme(R.style.DarkTheme);
if(SettingsActivity.mUnits){
setContentView(R.layout.google_maps_tracker_metric);
} else {
setContentView(R.layout.google_maps_tracker);
}
}
@Override
protected void onResume(){
super.onResume();
// Get both fragments shown on the same screen
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
GoogleMapsTracker fragment;
fragment = GoogleMapsTracker.newInstance();
GoogleMapsOGLES fragmentOGL;
fragmentOGL = GoogleMapsOGLES.newInstance();
fragmentTransaction.add(R.id.map, fragment);
fragmentTransaction.add(R.id.gl, fragmentOGL);
fragmentTransaction.commit();
}
@Override
protected void onPause(){
super.onPause();
}
@Override
protected void onDestroy() {
super.onDestroy();
}
}
GoogleMapsTracker：
GoogleMapsTracker:
public class GoogleMapsTracker extends Fragment implements OnMapReadyCallback {
@Override
public void onMapReady(GoogleMap map){
}
MapView mapView;
GoogleMap map;
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*/
public static GoogleMapsTracker newInstance() {
GoogleMapsTracker fragment = new GoogleMapsTracker();
fragment.setRetainInstance(true);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mapView = (MapView) getActivity().findViewById(R.id.maps);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v;
v = inflater.inflate(R.layout.fragment_google_maps, container, false);
// Gets the MapView from the XML layout and creates it
mapView = (MapView) v.findViewById(R.id.maps);
mapView.onCreate(savedInstanceState);
// Gets to GoogleMap from the MapView and does initialization stuff
map = mapView.getMap();
map.getUiSettings().setMyLocationButtonEnabled(true);
map.getUiSettings().setZoomControlsEnabled(true);
map.getUiSettings().setRotateGesturesEnabled(true);
map.setMyLocationEnabled(true);
map.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
// Needs to call MapsInitializer before doing any CameraUpdateFactory calls
MapsInitializer.initialize(this.getActivity());
// Updates the location and zoom of the MapView
CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(new LatLng(49.025656, -125.035473), 18);
map.animateCamera(cameraUpdate);
return v;
}
GoogleMapsOGLES：
GoogleMapsOGLES:
public class GoogleMapsOGLES extends Fragment {
GLSurfaceView mGLSurfaceView;
private boolean rendererSet = false;
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*/
public static GoogleMapsOGLES newInstance() {
GoogleMapsOGLES fragment = new GoogleMapsOGLES();
fragment.setRetainInstance(true);
return fragment;
}
public GoogleMapsOGLES() {
// Do nothing
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mGLSurfaceView = new GLSurfaceView(getActivity());
// Check if the system supports OpenGL ES 2.0
final ActivityManager am = (ActivityManager) getActivity().getSystemService(Context.ACTIVITY_SERVICE);
final ConfigurationInfo cInfo = am.getDeviceConfigurationInfo();
final boolean supportsEs2 = cInfo.reqGlEsVersion >= 0x20000;
if(supportsEs2){
// Request an OpenGL ES 2.0 compatible context
mGLSurfaceView.setEGLContextClientVersion(2);
// Set the renderer to our demo renderer, defined below
mGLSurfaceView.setRenderer(new GoogleMapsRenderer(getActivity()));
rendererSet = true;
} else {
// This is where you could create an OpenGL ES1.x compatible
// renderer if you wanted to support both ES 1 and ES 2
Log.d("Does Not Support ES 2.0", "Does NOT Support ES 2.0");
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v;
v = inflater.inflate(R.layout.fragment_maps_ogl, container, false);
mGLSurfaceView = (GLSurfaceView) v.findViewById(R.id.ogl);
mGLSurfaceView.setEGLContextClientVersion(2);
GoogleMapsRenderer renderer = new GoogleMapsRenderer(getActivity());
mGLSurfaceView.setZOrderOnTop(true);
mGLSurfaceView.setEGLConfigChooser(8, 8, 8, 8, 16, 0);
mGLSurfaceView.getHolder().setFormat(PixelFormat.TRANSLUCENT);
mGLSurfaceView.setRenderer(renderer);
rendererSet = true;
mGLSurfaceView.setRenderMode(GLSurfaceView.RENDERMODE_CONTINUOUSLY);
return v;
}
google_maps_tracker.xml
google_maps_tracker.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<fragment
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.example.tracker.GoogleMapsTracker"
class="com.example.tracker.GoogleMapsTracker"/>
<fragment
android:id="@+id/gl"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="com.example.tracker.GoogleMapsOGLES"
class="com.example.tracker.GoogleMapsOGLES"/>
</RelativeLayout>
在XML文件中的碎片有，只是初始化的MapView和GLSurfaceView。
The fragments within the xml file had their own xml files that just initialized the MapView and GLSurfaceView.
这篇关于GLSurfaceView没有出现过的MapView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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