如何在 Android Studio 中使 ImageButton 可点击？

Question

我进行了大量研究，无论出于何种原因，无论我尝试什么，我都无法在 Android 工作室中获得可点击的 ImageButton。我尝试了很多东西，但我一定错过了一些东西。我将在下面传递 XML 文件，然后在其下方传递 Java。当我使用 setOnClickListener 方法时，我收到一条无法解析的消息，并且与我执行 onClickListener 时相同。我想要链接到网页的按钮。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

删除setOnClickListener，因为您已经在视图中指定按钮的onclick 函数为onClick。为避免混淆，将您的按钮重命名为 android:onClick="onClick"，例如 android:onClick="imageButtonOnClick"。

在你的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

只需复制并粘贴这两个文件即可。您声明了两次单击侦听器，这就是它不起作用的原因。

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);
    }

}