处理这些事情非常简单。我可以给你一个示例来处理我们添加的 Fr 代理的后退按钮。
我已经声明了一个片段堆栈,并将所有片段推入其中,例如:
public static Stack<Fragment> fragmentStack;
创建一个像这样的方法:
public static void replaceFragementsClick(Fragment fragementObj, Bundle bundleObj, String title){
try {
FragmentManager fragmentManager = ((FragmentActivity) mContext).getSupportFragmentManager();
if (fragementObj != null) {
fragementObj.setArguments(bundleObj);
fragmentManager.beginTransaction().replace(R.id.frame_container, fragementObj).commit();
}
DashBoardActivity.fragmentStack.push(fragementObj);
} catch (Exception e) {
e.printStackTrace();
}
}
也试试这个:
public static void replaceFragementsClickBack(Fragment fragementObj, Bundle bundleObj, String title){
try {
FragmentManager fragmentManager = ((FragmentActivity) mContext).getSupportFragmentManager();
if (fragementObj != null) {
fragementObj.setArguments(bundleObj);
fragmentManager.beginTransaction().replace(R.id.frame_container, fragementObj).commit();
DashBoardActivity.fragmentStack.pop();
}
} catch (Exception e) {
e.printStackTrace();
}
}
在您添加的基本活动中,重写backpressed方法,如下所示:
@Override
public void onBackPressed() {
fragmentStack.pop();
if(fragmentStack.size() >0){
Bundle bunldeObj = new Bundle();
Fragment fragment = fragmentStack.pop();
if(fragment instanceof PhotosFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Photos");
}else if(fragment instanceof PhotoDetatilFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Photos");
}else if(fragment instanceof PhotoFullViewFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Photos");
}else if(fragment instanceof HomeFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Home");
}else if(fragment instanceof VideosFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Videos");
}else if(fragment instanceof VideoDetailFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Videos");
}else if(fragment instanceof VideoViewFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Videos");
}else if(fragment instanceof MusicFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Music");
}else if(fragment instanceof MusicListFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Music");
}else if(fragment instanceof InstallAppsFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Apps");
}else if(fragment instanceof MessageFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Messages");
}else if(fragment instanceof MessageDetailFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Messages");
}else if(fragment instanceof LocateDeviceFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Locate Device");
}else if(fragment instanceof FilesFragmentBottomBar){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Files");
}else if(fragment instanceof AppsFragment){
bunldeObj.putString("position", "4");
replaceFragementsClick(fragment,bunldeObj,"Apps");
}else {
super.onBackPressed();
Intent intent = new Intent(DashBoardActivity.this,ConnectDeviceActivity.class);
startActivity(intent);
finish();
}
}