1

app/src/main/java/com/polysoft/nafmii/fragment/home/ModulesFragmentMgr.java

@@ -7,6 +7,7 @@ import androidx.fragment.app.FragmentTransaction;
 
 import com.polysoft.nafmii.bean.MenuBean;
 import com.polysoft.nafmii.enums.ModulesEnum;
+import com.polysoft.nafmii.fragment.HomeWebviewFragment;
 import com.polysoft.nafmii.fragment.WebViewFragment;
 import com.polysoft.nafmii.webview.IWebview;
 
@@ -14,18 +15,19 @@ import java.util.List;
 
 public class ModulesFragmentMgr implements FragmentManager.OnBackStackChangedListener {
 
-    private FragmentManager manager;
-    private int containerId;
+    private final FragmentManager manager;
+    private final int containerId;
+    private final ModuleUrlHandle moduleHandle;
+
     private ModulesEnum currentModule;
     private OnChangeModuleListener changeListener;
-    private ModuleUrlHandle moduleHandle;
 
     public ModulesFragmentMgr(FragmentActivity activity, int containerId) {
         this.manager = activity.getSupportFragmentManager();
         this.containerId = containerId;
         this.moduleHandle = new ModuleUrlHandle(activity);
 
-        manager.addOnBackStackChangedListener(this);
+        this.manager.addOnBackStackChangedListener(this);
     }
 
     public void addChangeModuleLsitener(OnChangeModuleListener listener) {
@@ -33,22 +35,23 @@ public class ModulesFragmentMgr implements FragmentManager.OnBackStackChangedLis
     }
 
     public void showInitFragment(ModulesEnum[] modules) {
-        for (int i = 0; i < modules.length; i++) {
-            this.addModuleFragment(modules[i]);
+        for (ModulesEnum module : modules) {
+            this.findNewModuleFragment(module);
         }
-
-        WebViewFragment fragment = this.findFragment(modules[0]);
-        FragmentTransaction transaction = this.manager.beginTransaction();
-        transaction.show(fragment).commitNow();
-        this.setCurrentModule(modules[0]);
+        this.showModule(modules[0]);
     }
 
     public WebViewFragment getCurrentFragment() {
+        if (null == this.currentModule) return null;
+
         return this.findFragment(this.currentModule);
     }
 
     public boolean onBackStack() {
-        WebViewFragment fragment = getCurrentFragment();
+        WebViewFragment fragment = this.getCurrentFragment();
+        if (null == fragment) {
+            return false;
+        }
         IWebview webview = fragment.getWebview();
         if (null != webview && webview.canGoBack()) {
             return false;
@@ -60,10 +63,27 @@ public class ModulesFragmentMgr implements FragmentManager.OnBackStackChangedLis
         return true;
     }
 
+    @Override
+    public void onBackStackChanged() {
+        List<Fragment> fragments = this.manager.getFragments();
+        for (int i = 0; i < fragments.size(); i++) {
+            Fragment fragment = fragments.get(i);
+            if (fragment.isVisible()) {
+                this.setCurrentModule(ModulesEnum.findModule(fragment.getTag()));
+                return;
+            }
+        }
+    }
+
     public void showModule(ModulesEnum module) {
         if (module == this.currentModule) {
             return;
         }
+        if (null == this.currentModule) {
+            this.showModuleFragment(this.findFragment(module));
+            this.setCurrentModule(module);
+            return;
+        }
         this.showModule(this.moduleHandle.getModuleHandle(module));
     }
 
@@ -71,54 +91,52 @@ public class ModulesFragmentMgr implements FragmentManager.OnBackStackChangedLis
         this.showModule(moduleHandle.getModuleHandle(bean));
     }
 
+
+    public WebViewFragment findFragment(ModulesEnum module) {
+        return (WebViewFragment) this.manager.findFragmentByTag(module.fmtKey);
+    }
+
     private void showModule(ModuleUrlHandle.IModuleHandle handle) {
         ModulesEnum module = handle.getModule();
-        WebViewFragment fragment = this.findFragment(module);
+        WebViewFragment fragment = this.findNewModuleFragment(module);
 
         if (!module.fmtKey.equals(this.currentModule.fmtKey)) {
-            FragmentTransaction transaction = this.manager.beginTransaction();
-            transaction.hide(this.getCurrentFragment());
-            transaction.addToBackStack("").show(fragment).commit();
+            this.showModuleFragment(fragment);
         } else {
             handle.loadUrl(fragment.getWebview());
         }
         this.setCurrentModule(module);
     }
 
-    public WebViewFragment findFragment(ModulesEnum module) {
-        return this.addModuleFragment(module);
-    }
-
-    private WebViewFragment addModuleFragment(ModulesEnum module) {
-        WebViewFragment fragment = (WebViewFragment) this.manager.findFragmentByTag(module.fmtKey);
+    private WebViewFragment findNewModuleFragment(ModulesEnum module) {
+        WebViewFragment fragment = this.findFragment(module);
         if (null == fragment) {
             FragmentTransaction transaction = this.manager.beginTransaction();
-            fragment = WebViewFragment.newInstances(this.moduleHandle.getModuleUrl(module));
+            fragment = HomeWebviewFragment.newInstance(this.moduleHandle.getModuleUrl(module));
             transaction.add(this.containerId, fragment, module.fmtKey).hide(fragment).commitNow();
         }
         return fragment;
     }
 
+    private void showModuleFragment(Fragment fragment) {
+        if (null == fragment) return;
+
+        FragmentTransaction transaction = this.manager.beginTransaction();
+        WebViewFragment currentFragment = this.getCurrentFragment();
+        if (null != currentFragment) {
+            transaction.hide(currentFragment).addToBackStack("");
+        }
+        transaction.show(fragment).commit();
+    }
+
     private void setCurrentModule(ModulesEnum module) {
         this.currentModule = module;
         if (null != this.changeListener) {
-            Fragment fragment = this.getCurrentFragment();
+            WebViewFragment fragment = this.getCurrentFragment();
             this.changeListener.changeModule(module, fragment);
         }
     }
 
-    @Override
-    public void onBackStackChanged() {
-        List<Fragment> fragments = this.manager.getFragments();
-        for (int i = 0; i < fragments.size(); i++) {
-            Fragment fragment = fragments.get(i);
-            if (fragment.isVisible()) {
-                this.setCurrentModule(ModulesEnum.findModule(fragment.getTag()));
-                return;
-            }
-        }
-    }
-
 
     public interface OnChangeModuleListener {
         void changeModule(ModulesEnum module, Fragment fragment);