如何将 ImageButton 放入 Fragment 中，当我单击 Image Button 时会导致另一个活动

问题描述

当我点击按钮时，我试图让我的 ImageButton 变成另一个活动，但我不知道如何在片段页面上做到这一点。

XML 代码：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".AboutFragment">

    <!-- Todo: Update blank fragment layout -->

    <ImageButton
        android:id="@+id/imageButton"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_gravity="top|right"
        android:layout_marginTop="200dp"
        android:src="@drawable/ic_launcher_foreground" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:text="About"
        android:textSize="48sp"
        android:textStyle="bold" />


</FrameLayout>

JAVA 代码：

package com.example.voiz;

import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link AboutFragment#newInstance} factory method to
 * create an instance of this fragment.
 *
 */
public class AboutFragment extends Fragment {
    

    // Todo: Rename parameter arguments,choose names that match
    // the fragment initialization parameters,e.g. ARG_ITEM_NUMBER
    private static final String ARG_ParaM1 = "param1";
    private static final String ARG_ParaM2 = "param2";

    // Todo: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment AboutFragment.
     */
    // Todo: Rename and change types and number of parameters
    public static AboutFragment newInstance(String param1,String param2) {
        AboutFragment fragment = new AboutFragment();
        Bundle args = new Bundle();
        args.putString(ARG_ParaM1,param1);
        args.putString(ARG_ParaM2,param2);
        fragment.setArguments(args);
        return fragment;
    }

    public AboutFragment() {
        // required empty public constructor

    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);



        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_ParaM1);
            mParam2 = getArguments().getString(ARG_ParaM2);
        }
    }

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

我是 Android Studio 的新手，我目前使用的版本是 4.1.3 而且我不熟悉片段编码，因为我通常在活动中进行编码。 我正在努力分配 fragmentJava 我还按照本教程 https://www.youtube.com/watch?v=MiphbOtSyWY&t=244s 了解为什么我的项目文件中有片段的上下文。提前谢谢你。

解决方法

因此对于下面的代码片段可能会有所帮助。首先，您应该删除所有不必要的东西 [1] 然后改变您对片段进行膨胀的方式 [2]。对于像这样的图像按钮调用[3]。然后在 onCreateView 中，您可以像这样从 XML 文件中调用您的图像按钮 [4]。如果您有任何疑问，请告诉我。

public class AboutFragment extends Fragment {

[1] Remove from here to -    


// TODO: Rename parameter arguments,choose names that match
// the fragment initialization parameters,e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";

// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;

/**
 * Use this factory method to create a new instance of
 * this fragment using the provided parameters.
 *
 * @param param1 Parameter 1.
 * @param param2 Parameter 2.
 * @return A new instance of fragment AboutFragment.
 */
// TODO: Rename and change types and number of parameters
public static AboutFragment newInstance(String param1,String param2) {
    AboutFragment fragment = new AboutFragment();
    Bundle args = new Bundle();
    args.putString(ARG_PARAM1,param1);
    args.putString(ARG_PARAM2,param2);
    fragment.setArguments(args);
    return fragment;
}

public AboutFragment() {
    // Required empty public constructor

}


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);



    if (getArguments() != null) {
        mParam1 = getArguments().getString(ARG_PARAM1);
        mParam2 = getArguments().getString(ARG_PARAM2);
    }
}


--> TO here remove all the above stuffs

private ImageButton imagebutton;[3]

@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    [2]
    return inflater.inflate(R.layout.fragment_about,container,false);// Remove this 
    //And replace with the below 
    View view = inflater.inflate(R.layout.fragment_about,false);
    [4]
    imagebutton = view.findViewById(R.id.imageButton);
   
  }
}