【安卓开发】按钮点击事件

秒速五厘米 2023-07-21 08:34 4阅读 0赞

![1783030-20200329202217042-670825903.png][]

布局

<?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.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=".MainActivity">
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="#00BCD4"
            android:orientation="vertical">
    
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="215dp"
                android:background="#FFFFFF"
                android:orientation="horizontal">
    
                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_margin="10dp"
                    android:src="@drawable/tu1" />
            </LinearLayout>
    
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="#FFFFFF"
                android:orientation="vertical">
    
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="#FFFFFF"
                    android:orientation="horizontal">
    
                    <ImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:id="@+id/image1"
                        android:src="@mipmap/ic_launcher"></ImageView>
    
                    <ImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:src="@mipmap/ic_launcher"></ImageView>
    
                    <ImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:src="@mipmap/ic_launcher"></ImageView>
                </LinearLayout>
    
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="#FFFFFF"
    
                    android:orientation="horizontal">
    
                    <ImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:src="@mipmap/ic_launcher"></ImageView>
    
                    <ImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:src="@mipmap/ic_launcher"></ImageView>
    
                    <ImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_weight="1"
                        android:src="@mipmap/ic_launcher"></ImageView>
                </LinearLayout>
                <Button
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="OPEN"
                    android:id="@+id/Button1"
                    >
                </Button>
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="Hello,world!"
                    android:id="@+id/text1"
                    >
    
                </TextView>
            </LinearLayout>
    
        </LinearLayout>
    </androidx.constraintlayout.widget.ConstraintLayout>

Java控制文件

package com.huangenet.myapplication;
    
    import android.annotation.SuppressLint;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import androidx.appcompat.app.AppCompatActivity;
    
    public class MainActivity extends AppCompatActivity {
        private Button Button1;
        private ImageView image1;
        private TextView text1;
    
        //参数初始化
    
        @SuppressLint("WrongViewCast")
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            Button1=findViewById(R.id.Button1);//寻找布局文件里ID与自己定义的绑定
            Button1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    //打印
                    System.out.println("Hello!");
                    //弹窗
                    Toast.makeText(MainActivity.this,"hello",Toast.LENGTH_LONG).show();
                }
            });
            image1=findViewById(R.id.image1);
            image1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    //弹窗
                    Toast.makeText(MainActivity.this,"This a image!",Toast.LENGTH_LONG).show();
                }
            });
            text1=findViewById(R.id.text1);
            text1.setText("你好，2020年3月29日20:18:45");
    
        }
    }

[1783030-20200329202217042-670825903.png]: /images/20230528/2f4125eac051426eb5254ea92ece4eb3.png