安卓讲课笔记5.2——常用控件

太过爱你忘了你带给我的痛 2024-04-01 15:32 97阅读 0赞

## 一、继承关系图 ##

*  EditText都是TextView的子类，用于接收用户输入的数据。课后大家可以去玩一玩EditText的子类AutoCompleteTextView。

## 二、编辑框常用属性 ##

1.  text：文本框的文本内容
2.  maxLines：最大行数
3.  lines：行数
4.  inputType：输入数据类型
5.  hint：提示
6.  textColor：文本颜色
7.  textSize：文本字号
8.  textColorHint：提示文本颜色
9.  singleLine：文本是否单行（true, false）

### （三）实现步骤 ###

#### 1、创建安卓应用【UserRegistration】 ####

![ac144c79a33245a8b85e4fe86283cece.png][]

*  单击Finish，完成

![e4f8c88cb11248a781855317f5391638.png][]

#### 2、准备素材和图片 ####

![e62e455d6c1b4d5a99993432465a3e78.png][]

#### 3、主界面更名 ####

*  将主界面更名RegistrationActivity ，主资源文件改为registration

![8f3c87d8dcc04d5786083a73496a2183.png][]

#### 4、创建注册信息界面类 ####

*  基于Empty Acivity模板创建信息界面类——informationActivity
 *  ![64aaed58411a4e49b4de341de0ee4033.png][]

#### 5、字符串资源文件 ####

![de0d4801f5b84442ab79e03872276a6b.png][]

#### 6、主布局资源 ####

![681e69972da047dead17933a4596e47a.png][]

#### 7、信息界面布局资源 ####

![0463cbe816b54ff0a878753b87af9149.png][]

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
android:layout\_width="match\_parent"  
android:layout\_height="match\_parent"  
android:background="@drawable/information\_bg"  
android:orientation="vertical"  
android:padding="20dp" >

</LinearLayout>

#### 8、用户注册界面 ####

用户注册界面类——registrationActivity

![88e60a933cf84540b1f77a761c7082a3.png][]

*  声明变量
 *  ![fcf5b0dec16a4a539b9494a5e3495602.png][]

#### 9、注册信息显示界面 ####

注册界面信息功能——informationActivity

![9da16074c47d4f69a56f921b893a7f6e.png][]

package net.hw.user_registration;
    
    import android.content.Intent;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.EditText;
    
    import androidx.appcompat.app.AppCompatActivity;
    
    public class RegistrationActivity extends AppCompatActivity {
    
        private EditText edtName;
        private EditText edtGender;
        private EditText edtAge;
        private EditText edtPhone;
        private EditText edtEmail;
        private EditText edtHomePage;
        private EditText edtMemo;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            // 利用布局资源文件设置用户界面
            setContentView(R.layout.activity_registration);
    
            // 通过资源标识符获得控件实例
            edtName = findViewById(R.id.edtName);
            edtGender = findViewById(R.id.edtGender);
            edtAge = findViewById(R.id.edtAge);
            edtPhone = findViewById(R.id.edtPhone);
            edtEmail = findViewById(R.id.edtEmail);
            edtHomePage = findViewById(R.id.edtHomePage);
            edtMemo = findViewById(R.id.edtMemo);
        }
    
        /**
         * 注册按钮单击事件处理方法
         *
         * @param view
         */
        public void doRegister(View view) {
            // 获取用户输入数据
            String strName = edtName.getText().toString();
            String strGender = edtGender.getText().toString();
            String strAge = edtAge.getText().toString();
            String strPhone = edtPhone.getText().toString();
            String strEmail = edtEmail.getText().toString();
            String strHomePage = edtHomePage.getText().toString();
            String strMemo = edtMemo.getText().toString();
    
            // 将各项输入数据打包
            Bundle data = new Bundle();
            data.putString("name", strName);
            data.putString("gender", strGender);
            data.putString("age", strAge);
            data.putString("phone", strPhone);
            data.putString("email", strEmail);
            data.putString("home_page", strHomePage);
            data.putString("memo", strMemo);
    
            // 创建意图，指定起始组件与目标组件
            Intent intent = new Intent(RegistrationActivity.this, InformationActivity.class);
            // 利用意图携带数据包
            intent.putExtras(data);
            // 按意图启动目标窗口
            startActivity(intent);
        }
    
        /**
         * 取消按钮单击事件处理方法
         *
         * @param view
         */
        public void doCancel(View view) {
            finish();
        }
    }

#### 10、注册信息显示界面InformationActivity ####

![3420e6187e0b42088e1375d29f31929e.png][]

package net.hw.user_registration;
    
    import android.content.Intent;
    import android.os.Bundle;
    import android.widget.TextView;
    
    import androidx.appcompat.app.AppCompatActivity;
    
    public class InformationActivity extends AppCompatActivity {
        private TextView tvName;
        private TextView tvGender;
        private TextView tvAge;
        private TextView tvPhone;
        private TextView tvEmail;
        private TextView tvHomePage;
        private TextView tvMemo;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
    
            // 利用布局文件设置用户界面
            setContentView(R.layout.activity_information);
    
            // 通过资源标识获得控件示例
            tvName = (TextView) findViewById(R.id.tvName);
            tvGender = (TextView) findViewById(R.id.tvGender);
            tvAge = (TextView) findViewById(R.id.tvAge);
            tvPhone = (TextView) findViewById(R.id.tvPhone);
            tvEmail = (TextView) findViewById(R.id.tvEmail);
            tvHomePage = (TextView) findViewById(R.id.tvHomePage);
            tvMemo = (TextView) findViewById(R.id.tvMemo);
    
            // 获得意图
            Intent intent = getIntent();
    
            if (intent != null) {
                // 获得意图携带的数据包
                Bundle bundle = intent.getExtras();
    
                // 从数据包里按键取值
                String strName = bundle.getString("name");
                String strGender = bundle.getString("gender");
                String strAge = bundle.getString("age");
                String strPhone = bundle.getString("phone");
                String strEmail = bundle.getString("email");
                String strHomePage = bundle.getString("home_page");
                String strMemo = bundle.getString("memo");
    
                // 设置各个标签的内容
                tvName.setText("姓名：" + strName);
                tvGender.setText("性别：" + strGender);
                tvAge.setText("年龄：" + strAge);
                tvPhone.setText("电话：" + strPhone);
                tvEmail.setText("邮箱：" + strEmail);
                tvHomePage.setText("主页：" + strHomePage);
                tvMemo.setText("备注：" + strMemo);
            }
        }
    }

#### 11、启动应用，查看效果 ####

素材还没有出来

####  ####

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