ModulesFragmentMgr.java
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package com.polysoft.nafmii.fragment;
import android.text.TextUtils;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import com.polysoft.nafmii.bean.MenuBean;
import com.polysoft.nafmii.enums.ModulesEnum;
import com.polysoft.nafmii.webview.IWebview;
import java.util.List;
public class ModulesFragmentMgr implements FragmentManager.OnBackStackChangedListener {
private FragmentManager manager;
private int containerId;
private ModulesEnum currentModule;
private OnChangeModuleListener changeListener;
public ModulesFragmentMgr(FragmentManager manager, int containerId) {
this.manager = manager;
this.containerId = containerId;
}
public void addChangeModuleLsitener(OnChangeModuleListener listener) {
this.changeListener = listener;
}
public void showInitFragment(ModulesEnum[] modules) {
for (int i = 0; i < modules.length; i++) {
this.addModuleFragment(modules[i]);
}
WebViewFragment fragment = this.findFragment(modules[0]);
FragmentTransaction transaction = this.manager.beginTransaction();
transaction.show(fragment).commitNow();
this.setCurrentModule(modules[0]);
}
public WebViewFragment getCurrentFragment() {
return this.findFragment(this.currentModule);
}
public boolean onBackStack() {
WebViewFragment fragment = getCurrentFragment();
IWebview webview = fragment.getWebview();
if (null != webview && webview.canGoBack()) {
return false;
}
if (this.manager.getBackStackEntryCount() > 0) {
this.manager.addOnBackStackChangedListener(this);
this.manager.popBackStack();
return false;
}
return true;
}
public void showModule(ModulesEnum module) {
if (!module.fmtKey.equals(this.currentModule.fmtKey)) {
WebViewFragment fragment = this.findFragment(module);
FragmentTransaction transaction = this.manager.beginTransaction();
transaction.hide(this.getCurrentFragment());
transaction.addToBackStack("").show(fragment).commit();
}
this.setCurrentModule(module);
}
public void showModule(MenuBean bean) {
ModulesEnum module = ModulesEnum.findModule(bean.getModuleName());
Fragment fragment = this.findFragment(module);
if (!TextUtils.isEmpty(bean.getUrl())) {
((IWebview) fragment).loadUrl(bean.getUrl());
}
if (!module.fmtKey.equals(this.currentModule.fmtKey)) {
FragmentTransaction transaction = this.manager.beginTransaction();
transaction.hide(this.getCurrentFragment());
transaction.addToBackStack("").show(fragment).commit();
}
this.setCurrentModule(module);
}
public WebViewFragment findFragment(ModulesEnum module) {
WebViewFragment fragment = (WebViewFragment) this.manager.findFragmentByTag(module.fmtKey);
if (null == fragment) {
return this.addModuleFragment(module);
}
return fragment;
}
private WebViewFragment addModuleFragment(ModulesEnum module) {
WebViewFragment fragment = (WebViewFragment) this.manager.findFragmentByTag(module.fmtKey);
if (null == fragment) {
FragmentTransaction transaction = this.manager.beginTransaction();
fragment = WebViewFragment.newInstances(module.webUrl);
transaction.add(this.containerId, fragment, module.fmtKey).hide(fragment).commitNow();
}
return fragment;
}
private void setCurrentModule(ModulesEnum module) {
this.currentModule = module;
if (null != this.changeListener) {
Fragment 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()) {
setCurrentModule(ModulesEnum.findModule(fragment.getTag()));
return;
}
}
}
public interface OnChangeModuleListener {
void changeModule(ModulesEnum module, Fragment fragment);
}
}