我的 HomeFragment 上有一些按钮，我想在从 fragment 单击按钮时打开 fragment 。类似导航的东西。我正在尝试使用以下代码，但没有奏效。请帮忙 !我对 android 很陌生，正在尝试学习新事物。

这是我的代码

import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class HomeFragment extends Fragment {

    public HomeFragment(){}



    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_home, container, false);

        Button aboutBtn = (Button) rootView.findViewById(R.id.aboutusButton);
        Button phonebookBtn = (Button) rootView.findViewById(R.id.phbookButton);
        Button schemeBtn = (Button) rootView.findViewById(R.id.schemeButton);
        Button loanBtn = (Button) rootView.findViewById(R.id.loanButton);
        Button serviceBtn = (Button) rootView.findViewById(R.id.serviceButton);
        Button devBtn = (Button) rootView.findViewById(R.id.devButton);

        aboutBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v)
            {
                // Launching new Activity on selecting single List Item
                Intent i = new Intent(getActivity(), AboutFragment.class);
                startActivity(i);
            }
        });

        phonebookBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v)
            {
                // Launching new Activity on selecting single List Item
                Intent j = new Intent(getActivity(), PhoneBookFragment.class);
                startActivity(j);
            }
        });

        schemeBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v)
            {
                // Launching new Activity on selecting single List Item
                Intent k = new Intent(getActivity(), HomeFragment.class);
                startActivity(k);
            }
        });

        loanBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v)
            {
                // Launching new Activity on selecting single List Item
                Intent l = new Intent(getActivity(), RemittanceFragment.class);
                startActivity(l);
            }
        });

        serviceBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v)
            {
                // Launching new Activity on selecting single List Item
                Intent m = new Intent(getActivity(), ServiceFragment.class);
                startActivity(m);
            }
        });

        devBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v)
            {
                // Launching new Activity on selecting single List Item
                Intent n = new Intent(getActivity(), AboutDeveloper.class);
                startActivity(n);
            }
        });


        return rootView;
    }
}

我正在寻找类似波纹管代码的东西，但不知道如何使代码与我的代码一起使用。

Button aboutBtn = (Button) v.findViewById(R.id.aboutButton);
aboutBtn.setOnClickListener(this);

Button homeBtn = (Button) v.findViewById(R.id.homeButton);
homeButton.setOnClickListener(this);

Button serviceBtn = (Button) v.findViewById(R.id.serviceButton);
serviceBtn.setOnClickListener(this);

@Override
public void onClick(View view) {
    Fragment fragment = null;
    switch (view.getId()) {
        case aboutButton:
            fragment = new AboutFragment();
            break;

        case homeBtn:
            fragment = new PhonebookFragment();
            break;

        case serviceBtn:
            fragment = new ServiceFragment();
            break;

        default:
            fragment = new HomeFragment();
            break;

    }
}

最佳答案

您可以在单击按钮时使用 FragmentTransaction 替换 fragment 。像这样的:

  Fragment someFragment = new SomeFragment(); 
    FragmentTransaction transaction = getFragmentManager().beginTransaction();
    transaction.replace(R.id.fragment_container, someFragment ); // give your fragment container id in first parameter
    transaction.addToBackStack(null);  // if written, this transaction will be added to backstack
    transaction.commit(); 

了解 performing fragment transactions here.

代码:

  package com.rupomkhondaker.sonalibank;

import android.app.Fragment;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class HomeFragment extends Fragment implements View.OnClickListener {

    public HomeFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_home, container, false);

        Button aboutBtn = (Button) rootView.findViewById(R.id.aboutusButton);
        Button phonebookBtn = (Button) rootView.findViewById(R.id.phbookButton);

        aboutBtn.setOnClickListener(this);
        phonebookBtn.setOnClickListener(this);


        return rootView;
    }

    @Override
    public void onClick(View view) {
        Fragment fragment = null;
        switch (view.getId()) {
            case R.id.aboutusButton:
                fragment = new AboutFragment();
                replaceFragment(fragment);
                break;

            case R.id.phbookButton:
                fragment = new PhoneBookFragment();
                replaceFragment(fragment);
                break;
        }
    }

    public void replaceFragment(Fragment someFragment) {
        FragmentTransaction transaction = getFragmentManager().beginTransaction();
        transaction.replace(R.id.frame_container, someFragment);
        transaction.addToBackStack(null);
        transaction.commit();
    }


}

关于android - 如何从Android中的 fragment 单击按钮打开 fragment ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32700818/