Android控件实例

xml布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.homework03.MainActivity" >

    <!-- 第一行：姓名 -->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="姓名"
            android:textSize="20sp" />

        <EditText
            android:id="@+id/edit_name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="输入姓名"
            android:textSize="20sp" />
    </LinearLayout>
    <!-- 第二行：密码 -->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="密码"
            android:textSize="20sp" />

        <EditText
            android:id="@+id/edit_password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="输入密码"
            android:inputType="textPassword"
            android:textSize="20sp" />
    </LinearLayout>
    <!-- 第三行：性别 -->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="性别"
            android:textSize="20sp" />

        <RadioGroup
            android:id="@+id/group_sex"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >

            <RadioButton
                android:id="@+id/rb_man"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="男" />

            <RadioButton
                android:id="@+id/rb_woman"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="女" />
        </RadioGroup>
    </LinearLayout>
    <!-- 第四行：年龄 -->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="年龄"
            android:textSize="20sp" />

        <EditText
            android:id="@+id/edit_age"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="输入年龄"
            android:inputType="number"
            android:textSize="20sp" />
    </LinearLayout>
    <!-- 第五行：email -->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Email"
            android:textSize="20sp" />

        <EditText
            android:id="@+id/edit_email"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="输入Email"
            android:inputType="textEmailAddress"
            android:textSize="20sp" />
    </LinearLayout>
    <!-- 第六行：爱好 -->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="爱好"
            android:textSize="20sp" />

        <GridLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:columnCount="4"
            android:rowCount="3" >

            <CheckBox
                android:id="@+id/checkbox0"
                android:text="动漫" />

            <CheckBox
                android:id="@+id/checkbox1"
                android:text="美食" />

            <CheckBox
                android:id="@+id/checkbox2"
                android:text="约会" />

            <CheckBox
                android:id="@+id/checkbox3"
                android:text="Dota" />

            <CheckBox
                android:id="@+id/checkbox4"
                android:text="篮球" />

            <CheckBox
                android:id="@+id/checkbox5"
                android:text="野炊" />

            <CheckBox
                android:id="@+id/checkbox6"
                android:text="电影" />

            <CheckBox
                android:id="@+id/checkbox7"
                android:text="桌游" />

            <CheckBox
                android:id="@+id/check_all"
                android:text="全选" />

            <CheckBox
                android:id="@+id/check_none"
                android:text="全不选" />
        </GridLayout>
    </LinearLayout>
    <!-- 第七行：评分 -->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:layout_width="50dp"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="评分"
            android:textSize="20sp" />

        <RatingBar
            android:id="@+id/ratingbar"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:numStars="5" />
    </LinearLayout>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="确定"
        android:onClick="btn_click"
        />
</LinearLayout>

源代码：

package com.example.homework03;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RatingBar;
import android.widget.Toast;

public class MainActivity extends Activity {
    private EditText edit_name, edit_passwd, edit_age, edit_email;
    private RadioGroup group_sex;
    private CheckBox[] checks;
    private CheckBox checkAll, checkNone;
    private RatingBar ratingBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 找出对应的控件
        edit_name = (EditText) findViewById(R.id.edit_name);
        edit_passwd = (EditText) findViewById(R.id.edit_password);
        edit_age = (EditText) findViewById(R.id.edit_age);
        edit_email = (EditText) findViewById(R.id.edit_email);
        group_sex = (RadioGroup) findViewById(R.id.group_sex);
        checks = new CheckBox[8];
        checks[0] = (CheckBox) findViewById(R.id.checkbox0);
        checks[1] = (CheckBox) findViewById(R.id.checkbox1);
        checks[2] = (CheckBox) findViewById(R.id.checkbox2);
        checks[3] = (CheckBox) findViewById(R.id.checkbox3);
        checks[4] = (CheckBox) findViewById(R.id.checkbox4);
        checks[5] = (CheckBox) findViewById(R.id.checkbox5);
        checks[6] = (CheckBox) findViewById(R.id.checkbox6);
        checks[7] = (CheckBox) findViewById(R.id.checkbox7);
        checkAll = (CheckBox) findViewById(R.id.check_all);
        checkNone = (CheckBox) findViewById(R.id.check_none);
        ratingBar = (RatingBar) findViewById(R.id.ratingbar);
        ratingBar.setMax(5);
        // 给checkbox添加onCheck事件
        checkAll.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked) { // 当勾上了全选时，才选择全部的CheckBox
                    for(CheckBox check : checks) {
                        check.setChecked(true);
                    }
                    checkNone.setChecked(false);
                }
            }
        });
        checkNone.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if(isChecked) { // 当勾上了全不选时，才取消选择全部的CheckBox
                    for(CheckBox check : checks) {
                        check.setChecked(false);
                    }
                    checkAll.setChecked(false);
                }
            }
        });
    }

    public void btn_click(View view) {
        String result = "";
        String name = edit_name.getText().toString();
        result += "姓名：" + name +"\n";
        String passwd = edit_passwd.getText().toString();
        result += "密码：" + passwd +"\n";
        int id = group_sex.getCheckedRadioButtonId();
        RadioButton rb = (RadioButton) findViewById(id);
        String sex = rb.getText().toString();
        result += "性别：" + sex + "\n";
        int age = Integer.parseInt(edit_age.getText().toString());
        result += "年龄：" + age +"\n";
        String email = edit_email.getText().toString();
        result += "Email：" + email +"\n";

        String favor = "";
        for(CheckBox check : checks) {
            if(check.isChecked()) {
                favor += check.getText().toString() + " ";
            }
        }
        result += "爱好：" + favor +"\n";

        int rating = ratingBar.getProgress();
        result += "评分：" + rating +"\n";

        Toast.makeText(MainActivity.this, result, Toast.LENGTH_LONG).show();
    }
}