Android基础——基本UI控件：

两种文本框：EditText，TextView，

两种按钮：Button，ImageButton，

单选按钮/单选按钮组：RadioButton，RadioGroup

复选框：CheckBox

<?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"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:paddingBottom="16dp"
    android:paddingTop="16dp"
    tools:context=".MainActivity"
    android:orientation="vertical"
    >

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:lines="6"
        android:hint="说点什么吧"
        android:background="#FFFFFF"
        android:padding="5dp"
        android:gravity="top"
        android:layout_marginBottom="10dp"
        android:inputType="textMultiLine"
        android:id="@+id/edit2"
        />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:drawableLeft="@mipmap/b"
        android:drawablePadding="8dp"
        android:text="添加照片"
        android:background="#FFFFFF"
        android:gravity="center_vertical"
        android:padding="8dp"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="按鈕1"
        android:id="@+id/button1"
        />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="按鈕2"
        android:id="@+id/button2"
        android:onClick="myClick"
        />

    <ImageButton
        android:id="@+id/imgbt1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/b"
        android:background="#0000"
        android:layout_gravity="center_horizontal"
        />
    <ImageButton
        android:id="@+id/imgbt2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@mipmap/b"
        android:background="#0000"
        android:layout_marginTop="10dp"
        android:layout_gravity="center_horizontal"
        android:onClick="myClick1"
        />
    <RadioButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="男"
        android:checked="true"
        />
    <RadioGroup
        android:id="@+id/radiogroup1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="男"
            />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女"
            />
    </RadioGroup>
    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="提交"
        android:checked="true"
        />

    <CheckBox
        android:id="@+id/A"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="A"
        />
    <CheckBox
        android:id="@+id/B"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="B"
        />
    <CheckBox
        android:id="@+id/C"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="C"
        android:checked="true"
        />

</LinearLayout>

调用方法

package com.example.mytextview;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    RadioGroup rg = null;
    CheckBox checkBox = null;

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

        Button button=(Button)findViewById(R.id.button1);
        button.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {//单击按钮时会触发的动作
                Toast.makeText(MainActivity.this,
                        "單機了按鈕1",Toast.LENGTH_LONG).show();
            }
        });
/*
        //設置全屏顯示
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);*/

        ImageButton imgbt1 = findViewById(R.id.imgbt1);
        imgbt1.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this,
                        "單機了圖片按鈕1",Toast.LENGTH_LONG).show();
            }
        });

        //获取单选按钮组的值
        rg = (RadioGroup) findViewById(R.id.radiogroup1);
        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                RadioButton r = findViewById(checkedId);
                Toast.makeText(MainActivity.this,"性别："+r.getText(),
                        Toast.LENGTH_SHORT).show();
            }
        });

        //通过按钮来获取单选按钮组的值
        Button button3 = (Button) findViewById(R.id.button3);
        button3.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                for(int i=0;i<rg.getChildCount();i++){
                    //获取一个单选按钮
                    RadioButton radioButton = (RadioButton) rg.getChildAt(i);
                    if(radioButton.isChecked()){
                        Toast.makeText(MainActivity.this,
                                radioButton.getText(),Toast.LENGTH_SHORT).show();
                        break;
                    }
                }
            }
        });

        //为复选框定义状态改变监听器
        checkBox = (CheckBox) findViewById(R.id.A);
        checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(checkBox.isChecked()){
                    checkBox.getText();
                    Toast.makeText(MainActivity.this,
                            checkBox.getText(),Toast.LENGTH_SHORT).show();
                }
            }
        });

    }

    public void myClick(View view){
        Toast.makeText(MainActivity.this,
                "單機了按鈕2",Toast.LENGTH_LONG).show();
    }
    public void myClick1(View view){
        Toast.makeText(MainActivity.this,
                "單機了圖片按鈕2",Toast.LENGTH_LONG).show();
    }
}

呈现界面