Android基础——基本UI控件（） _Android基础

【Android基础——基本UI控件（）】男儿欲遂平生志，五经勤向窗前读。这篇文章主要讲述Android基础——基本UI控件：相关的知识，希望能为你提供帮助。
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="https://www.songbingjia.com/android/@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="https://www.songbingjia.com/android/@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