关于java：SupportMapFragment在主线程上加载并冻结接口(忽略getMapAsync)

SupportMapFragment loading on the main thread and freezing the interface (getMapAsync ignored)

在默认的SupportMapFragment中，在实例化Fragment时将加载并创建MapView，从而在主线程上进行了大量工作。

下面的日志发生在调用getMapAsync(this);之前，这是主线程冻结大约2秒钟的时刻。日志以某种方式证明了getMapAsync()。

之前的所有内容都已创建。

不应该仅在调用getMapAsync()时加载地图吗？

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I/OpenGLRenderer: Initialized EGL, version 1.4
D/OpenGLRenderer: Enabling debug mode 0
D/OpenGLRenderer: endAllActiveAnimators on 0xb7966f90 (RippleDrawable) with handle 0xb7988688
I/AppCompatViewInflater: app:theme is now deprecated. Please move to using android:theme instead.
I/zzy: Making Creator dynamically
W/ResourcesManager: Asset path '/system/framework/com.android.media.remotedisplay.jar' does not exist or contains no resources.
W/ResourcesManager: Asset path '/system/framework/com.android.location.provider.jar' does not exist or contains no resources.
W/art: Suspending all threads took: 5.704ms
D/ChimeraCfgMgr: Loading module com.google.android.gms.maps from APK /data/data/com.google.android.gms/app_chimera/chimera-module-root/module-fcfb08c37b9ca44c48d9936b0e1895ef8b9cffe0/MapsModule.apk
D/ChimeraModuleLdr: Loading module APK /data/data/com.google.android.gms/app_chimera/chimera-module-root/module-fcfb08c37b9ca44c48d9936b0e1895ef8b9cffe0/MapsModule.apk
D/ChimeraFileApk: Primary ABI of requesting process is armeabi-v7a
D/ChimeraFileApk: Classloading successful. Optimized code found.
I/GoogleMapsAndroidAPI: Google Play services client version: 7895000
I/GoogleMapsAndroidAPI: Google Play services package version: 8115236
I/e: Token loaded from file. Expires in: 393978062 ms.
I/e: Scheduling next attempt in 393678 seconds.
I/Choreographer: Skipped 44 frames! The application may be doing too much work on its main thread.

这是片段：

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public class StoreMapFragment extends SupportMapFragment
implements OnMapReadyCallback {

private GoogleMap mMap;

public static StoreMapFragment newInstance() {
StoreMapFragment fragment = new StoreMapFragment();
return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getMapAsync(this);
}

@Override
public void onMapReady(GoogleMap map) {
mMap = map;
loadStores();
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setRetainInstance(true);
}

public void loadStores() {
if(mMap == null)
return;

// Add markers
}
}

相关：

首次在Google Maps中启动Activity的速度很慢
是什么使我的地图片段加载缓慢？

通过延迟片段实例化解决。

首先，我在另一个Fragment中添加了SupportMapFragment，然后按照此处的建议延迟了SupportMapFragment实例化。

StoreMapFragment.java

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public class StoreMapFragment extends Fragment
implements OnMapReadyCallback {

SupportMapFragment mMapFragment;
private GoogleMap mMap;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View view = inflater.inflate(R.layout.fragment_map, container, false);

if (mMap == null) {
final OnMapReadyCallback listener = this;
new Handler().postDelayed(new Runnable() {

@Override
public void run() {
if (isAdded()) {
mMapFragment = new SupportMapFragment();
FragmentManager fm = getChildFragmentManager();
fm.beginTransaction()
.replace(R.id.map, mMapFragment).commit();
mMapFragment.getMapAsync(listener);
}
}
}, 1000);
}

return view;
}

@Override
public void onMapReady(GoogleMap map) {
mMap = map;
loadStores();
}
}

fragment_map.xml

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