how to set setContentView in fragment

问题

I am trying to call a library in a fragment but dont know how to set it in a fragment I have done it in the main activity but I am getting an error in setting the setContentView in my fragment the compile dependency

compile 'com.github.medyo:android-about-page:1.0.2'

my fragment content view

  @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View rootView  = inflater.inflate(R.layout.fragment_navigation, container, false);
    Element versionElement = new Element();
    versionElement.setTitle("Version 6.2");

    Element adsElement = new Element();
    adsElement.setTitle("Advertise with us");

    View aboutPage = new AboutPage(getActivity())
            .isRTL(false)
            .addItem(versionElement)
            .addItem(adsElement)
            .addGroup("Connect with us")
            .addEmail("elmehdi.sakout@gmail.com")
            .addFacebook("the.medy")
            .addTwitter("medyo80")
            .addYoutube("UCdPQtdWIsg7_pi4mrRu46vA")
            .addPlayStore("com.ideashower.readitlater.pro")
            .addInstagram("medyo80")
            .addGitHub("medyo")
            .create();

    setContentView(aboutPage);
    return rootView;
}

I am getting error in the second last line how to solve this. The following library will work in api 20+ library https://github.com/medyo/android-about-page

回答1:

On a fragment you don't call setContentView explicitly, you return the view after inflating it, as you are. So instead of calling setContentView consider adding the view aboutPage to rootView or one of its children views.

For example, say your layout R.layout.fragment_navigation contains a LinearLayout (or any other ViewGroup for that matter) with an ID of content. You would do this, before your return statement:

LinearLayout content = (LinearLayout) rootView.findViewById(R.id.content);
content.addView(aboutPage); //<-- Instead of setContentView(aboutPage)

You'll have to adjust this to your layout, I don't know what's inside it.

Full example

fragment.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="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/container">
</RelativeLayout>

CustomFragment.java

public class FragmentExample extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        ViewGroup viewGroup = (ViewGroup) inflater.inflate(R.layout.fragment, container, false);
        Element versionElement = new Element();
        versionElement.setTitle("Version 6.2");

        Element adsElement = new Element();
        adsElement.setTitle("Advertise with us");

        View aboutPage = new AboutPage(getActivity())
                .isRTL(false)
                .addItem(versionElement)
                .addItem(adsElement)
                .addGroup("Connect with us")
                .addEmail("elmehdi.sakout@gmail.com")
                .addFacebook("the.medy")
                .addTwitter("medyo80")
                .addYoutube("UCdPQtdWIsg7_pi4mrRu46vA")
                .addPlayStore("com.ideashower.readitlater.pro")
                .addInstagram("medyo80")
                .addGitHub("medyo")
                .create();

        viewGroup.addView(aboutPage);
        return viewGroup;
    }
}

回答2:

If you need just aboutPage than change the return statement to return aboutPage;

回答3:

setContentView() is for Activities, for Fragments you have to return the inflated layout on the onCreateView() method like this:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
    Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.article_view, container, false);
}

I hope it helps.

回答4:

in Android X you simply can first import

import androidx.fragment.app.Fragment

and then in constructor pass your layout id like R.layout.fragment_navigation and then just override onViewCreated methode (it,s safer too)and than you just implement onCreateView(). Example:

import android.view.View
import android.widget.*
import androidx.fragment.app.Fragment

class MahrInCoinFragment : Fragment(R.layout.fragment_navigation) {

private lateinit var mCoin: Coin

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)

    // Load coin saved data or use default value
    val cost: Int = Hawk.get(Constant.COIN_COST_KEY, Constant.DEFAULT_COIN_PRICE)
    val date: String = Hawk.get(Constant.COIN_DATE_KEY, Constant.DEFAULT_COIN_DATE)
    updateCoin(Coin().apply { this.cost = cost; this.date = date })

    // Handle listeners
    view.findViewById<Button>(R.id.btn_calculate).setOnClickListener(this)
    view.findViewById<ImageButton>(R.id.btn_update).setOnClickListener(this)
}

来源：https://stackoverflow.com/questions/36870159/how-to-set-setcontentview-in-fragment