image.png

layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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.example.my_imagebutton.MainActivity"
    android:orientation="vertical">

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:text="下载战狼点这里,你懂的"/>


    <ImageButton

        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/image_button"
        android:onClick="onImageButtonClick"
        android:src="@drawable/image_"

        />

    <!--onImageButtonClick与java代码中类对应-->
    <!--<TextView-->
        <!--android:layout_width="wrap_content"-->
        <!--android:layout_height="wrap_content"-->
        <!--android:text="Hello World!"-->
        <!--app:layout_constraintBottom_toBottomOf="parent"-->
        <!--app:layout_constraintLeft_toLeftOf="parent"-->
        <!--app:layout_constraintRight_toRightOf="parent"-->
        <!--app:layout_constraintTop_toTopOf="parent" />-->

</LinearLayout>

package com.example.my_imagebutton;

import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;

public class MainActivity extends AppCompatActivity {

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

        Button button = findViewById(R.id.button1);
        ImageButton imageButton = findViewById(R.id.image_button);
    }
    //4.在XML中添加onClick属性
    public void onButtonClick(View view){
        new AlertDialog.Builder(MainActivity.this).
            setTitle("对话框").setIcon(R.mipmap.ic_launcher).
                setMessage(R.string.d_string).show();
    }
    public void onImageButtonClick(View view){
                    new AlertDialog.Builder( MainActivity.this).
                    setTitle("对话框").setIcon(R.mipmap.ic_launcher).
                            setMessage("哈哈,被骗了吧").show();}
                            //自定义一类
            public  class MyOnClick implements  View.OnClickListener{
                                @Override
                                public void onClick(View view) {

                                }
                            }
    public class MyImageOnClick implements View.OnClickListener{
        @Override
        public void onClick(View view) {

        }
    }


}

string.xml
<resources>
    <string name="app_name">My_imagebutton</string>
    <string name="d_string">你觉得我会让你下载吗</string>
    <string name="b_string">想下载战狼2吗，点我呀！！！</string>
</resources>