Android_Component_example
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(); } }
