导致活动不工作的片段中的按钮（更新）

Posted 2023-04-15

【中文标题】导致活动不工作的片段中的按钮（更新）

【英文标题】：Buttons in a fragment leading to an activity not working (updated)

【发布时间】：2020-09-04 19:43:28

【问题描述】：

我有一个带有 2 个按钮的片段，用于引导新活动。我已经获得了一些先前的反馈并创建了新代码。但是仍然没有任何效果，甚至打印语句也没有被触发

package com.example.workoutapp;
import android.content.Intent;
import android.graphics.PorterDuff;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class CreateFragment extends Fragment 
public Button button;
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable 
Bundle savedInstanceState) 
    View v = inflater.inflate(R.layout.fragment_create, container, false);
    Button Workoutbutton=(Button)v.findViewById(R.id.Workoutbutton);
    Button Timersbutton=(Button)v.findViewById(R.id.Timerbutton);
    Workoutbutton.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View v) 
            System.out.println("Workouts Clicked");
            Intent intent=new Intent(getActivity(),WorkoutsCreater.class);
            startActivity(intent);
        
    );
    Timersbutton.setOnClickListener(new View.OnClickListener() 
        @Override
        public void onClick(View v) 
            System.out.println("Timers Pressed");
            Intent intent=new Intent(getActivity(),TimersCreater.class);
            startActivity(intent);
        
    );

    return inflater.inflate(R.layout.fragment_create, container, false);

【参考方案1】：

package com.example.workoutapp;

import android.content.Intent;
import android.graphics.PorterDuff;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class CreateFragment extends Fragment implements View.OnClickListener 
    public Button workoutButton;
    public Button timersButton;
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) 
        View view = inflater.inflate(R.layout.fragment_create, container, false);
        workoutButton=view.findViewById(R.id.Workoutbutton);
        workoutButton.setOnClickListener(this);

        timersButton=view.findViewById(R.id.Timerbutton);
        timersButton.setOnClickListener(this);
        return view;

    


    @Override
    public void onClick(View v) 
        switch (v.getId())
            case R.id.Workoutbutton:
                System.out.println("Workout Button Pressed");
                break;
            case R.id.Timerbutton:
                System.out.println("Timers Button Pressed");
                break;