如何使 ImageButton 在 Android Studio 中可点击?

Question

我做了大量的研究，无论出于何种原因，无论我尝试什么，我都无法在Android工作室中点击ImageButton。我尝试了很多东西，但我一定错过了一些东西。我将在下面通过XML文件，然后在下面通过Java。当我放置setOnClickListener方法时，我收到一条无法解析的消息，当我执行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了按钮的 onclick 函数onClick。为避免混淆，请将按钮重命名为android:onClick="onClick"，如android:onClick="imageButtonOnClick"。

在你的Java代码中，你可以使用它

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为您工作。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);
}
}