如何让ImageButton在Android Studio中可点击？

Question

我做了大量的研究，无论我尝试什么原因，我都无法在Android工作室中获得ImageButton的可点击。我尝试了很多东西，但我必须错过一些东西。我将通过下面的XML文件，然后在下面的Java。当我放置setOnClickListener方法时，我得到一个无法解析的消息，并且当我做onClickListener时也是如此。我希望按钮链接到网页。请帮忙！

<?xml version="1.0" encoding="utf-8"?> 
<android.support.constraint.ConstraintLayout 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="com.autismacademyed.www.autismacademy.AutismAcademy"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAlignment="center" 
     android:textColor="@android:color/black" 
     android:textSize="36sp" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="1.0" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="0.173" /> 

    <ImageView 
     android:id="@+id/imageView2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     app:srcCompat="@drawable/logo" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintHorizontal_bias="0.0" /> 

    <ImageButton 
     android:id="@+id/imageButtonYellow" 
     android:layout_width="109dp" 
     android:layout_height="125dp" 
     android:layout_marginLeft="8dp" 
     android:layout_marginTop="8dp" 
     android:background="@null" 
     android:scaleType="centerCrop" 
     android:visibility="visible" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintTop_toBottomOf="@+id/imageView2" 
     app:srcCompat="@mipmap/ic_yellowpuzzlepiece" 
     android:onClick="onClick"/> 

</android.support.constraint.ConstraintLayout> 

这里就是Java：

package com.autismacademyed.www.autismacademy; 

import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.ImageButton; 

public class AutismAcademy extends AppCompatActivity { 



    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_autism_academy); 
    } 

    ImageButton imageButtonYellow = (ImageButton)findViewById(R.id.imageButtonYellow); 
    imageButtonYellow.setOnClickListener(new View.onClickListener() 

    public void onClick (View v) { 
     Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.aaed.org")); 
     startActivity(browserIntent); 
    } 

} 

Answer 1

取出setOnClickListener因为你已经在你的视图指定为按钮的onclick功能onClick。为了避免混淆，重命名您的按钮android:onClick="onClick"，如android:onClick="imageButtonOnClick"。

而且在Java代码中你可以使用这个

package com.autismacademyed.www.autismacademy; 

import android.content.Intent; 
import android.net.Uri; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.View; 
import android.widget.ImageButton; 

public class AutismAcademy extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_autism_academy); 
    } 

    public void imageButtonOnClick(View v) { 
     Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.aaed.org")); 
     startActivity(browserIntent); 
    } 

} 

Answer 2

只需复制并粘贴此两种文件会为你工作。你声明两个点击监听器，这是它不工作的原因。

xml文件

<?xml version="1.0" encoding="utf-8"?> 
<android.support.constraint.ConstraintLayout 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="com.autismacademyed.www.autismacademy.AutismAcademy"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAlignment="center" 
     android:textColor="@android:color/black" 
     android:textSize="36sp" 
     app:layout_constraintBottom_toBottomOf="parent" 
     app:layout_constraintHorizontal_bias="1.0" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintVertical_bias="0.173" /> 

    <ImageView 
     android:id="@+id/imageView2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     app:srcCompat="@drawable/logo" 
     app:layout_constraintTop_toTopOf="parent" 
     app:layout_constraintRight_toRightOf="parent" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintHorizontal_bias="0.0" /> 

    <ImageButton 
     android:id="@+id/imageButtonYellow" 
     android:layout_width="109dp" 
     android:layout_height="125dp" 
     android:layout_marginLeft="8dp" 
     android:layout_marginTop="8dp" 
     android:background="@null" 
     android:scaleType="centerCrop" 
     android:visibility="visible" 
     app:layout_constraintLeft_toLeftOf="parent" 
     app:layout_constraintTop_toBottomOf="@+id/imageView2" 
     app:srcCompat="@mipmap/ic_yellowpuzzlepiece" 
     android:onClick="buttonClick"/> 

</android.support.constraint.ConstraintLayout> 

jAVAFILE

public class AutismAcademy extends AppCompatActivity { 



    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_autism_academy); 
    } 


    public void buttonClick(View v) { 
     Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.aaed.org")); 
     startActivity(browserIntent); 
    } 

}