Question

我的HomeFragment上有一些按钮我想在片段上点击按钮打开片段。像导航这样的东西。我正在尝试使用波纹管代码，但没有奏效。请帮忙！我是android的新手并且正在尝试学习新东西。

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;
    }
}

我正在寻找类似下面的代码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;

    }
}

Answer 1

您可以在按钮单击时使用FragmentTransaction替换片段。像这样：

  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();
    }


}

Answer 2

我有一个简单的伎俩！这是MainActivity中的代码：

Intent intent=new Intent(getApplicationContext(),Main2Activity.class);
        intent.putExtra("pos",1);
        startActivity(intent);

Intent intent1=new Intent(getApplicationContext(),Main2Activity.class);
        intent1.putExtra("pos",2);
        startActivity(intent1);

在Main2Activity中，这是一个带有片段的NavigationDrawer

Bundle extras;
  extras=getIntent().getExtras();
        if(extras!=null)
        {
            position=extras.getInt("pos");
            if(position==1)
            {
                fragment=new FragmentOne();

                if(fragment !=null)
                {
                    android.support.v4.app.FragmentManager fragmentManager=getSupportFragmentManager();
                    FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction();
                    fragmentTransaction.replace(R.id.screen_area,fragment);
                    fragmentTransaction.commit();
                }
            }
            if(position==2)
            {
                fragment=new FragmentTwo();

                if(fragment !=null)
                {
                    android.support.v4.app.FragmentManager fragmentManager=getSupportFragmentManager();
                    FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction();
                    fragmentTransaction.replace(R.id.screen_area,fragment);
                    fragmentTransaction.commit();
                }
            }
        }

Answer 3

科特琳（Kotlin）示例：

fun FragmentActivity.replaceFragment(fragment: Fragment, frameId: Int = R.id.fragment_container, addToStack: Boolean) {
val doesFragmentAlreadyExists = supportFragmentManager.findFragmentByTag(fragment.javaClass.simpleName) != null
if (!doesFragmentAlreadyExists) {
    supportFragmentManager.inTransaction {
        if (addToStack) replace(frameId, fragment, fragment.javaClass.simpleName)
            .addToBackStack(fragment.javaClass.simpleName)
        else
            replace(frameId, fragment, fragment.javaClass.simpleName)
    }
}}

Answer 4

您可以使用它

NextFragment nextFrag= new NextFragment();
getActivity().getSupportFragmentManager().beginTransaction()
             .replace(R.id.Layout_container, nextFrag, "findThisFragment")
             .addToBackStack(null)
             .commit();

如何在Android中的片段中单击按钮打开片段

4 个答案: