实验 3 Android常用基本控件（一）
实验 3 Android常用基本控件（一）
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- 1.信息登记
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- string.xml
- activity_main.xml
- MainActivity.java
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- 3.简易计算器
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- string.xml
- activity_main.xml
- MainActivity.java
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- 总结
1.信息登记
string.xml
<string name="titile">学生信息登记string>
<string name="stu_no">学号：string>
<string name="stu_name">姓名：string>
<string name="stu_sex">性别：string>
<string name="stu_birthday">出生年月：string>
<string name="stu_class">专业班级：string>
<string name="stu_email">电子邮箱：string>
<string name="stu_result">登记信息：string>
<string name="hint_no">请输入学号string>
<string name="hint_name">请输入姓名string>
<string name="hint_sex">请输入性别string>
<string name="hint_birthday">请输入出生年月string>
<string name="hint_class">请输入专业班级string>
<string name="hint_email">请输入电子邮箱string>
<string name="btn_enregister">登记string>
<string name="btn_resetting">重置string>
activity_main.xml
<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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:orientation="vertical"
android:gravity="center_horizontal"
android:padding="10dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_gravity="center"
android:textSize="18sp"
android:textColor="#f00"
android:text="@string/titile"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal" >
<TextView
android:id="@+id/stu_no"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="@string/stu_no" />
<EditText
android:id="@+id/edit_no"
android:inputType="text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left|center_vertical"
android:layout_weight="1"
android:hint="@string/hint_no"
android:singleLine="true" >
<requestFocus />
EditText>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal" >
<TextView
android:id="@+id/stu_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="@string/stu_name" />
<EditText
android:id="@+id/edit_name"
android:inputType="text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left|center_vertical"
android:layout_weight="1"
android:hint="@string/hint_name"
android:singleLine="true" >
EditText>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal" >
<TextView
android:id="@+id/stu_sex"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="@string/stu_sex" />
<EditText
android:id="@+id/edit_sex"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left|center_vertical"
android:layout_weight="1"
android:hint="@string/hint_sex"
android:singleLine="true" >
EditText>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal" >
<TextView
android:id="@+id/stu_birthday"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="@string/stu_birthday" />
<EditText
android:id="@+id/edit_birthday"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left|center_vertical"
android:layout_weight="1"
android:inputType="date"
android:hint="@string/hint_birthday"
android:singleLine="true" >
EditText>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal" >
<TextView
android:id="@+id/stu_class"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="@string/stu_class" />
<EditText
android:id="@+id/edit_class"
android:inputType="text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left|center_vertical"
android:layout_weight="1"
android:hint="@string/hint_class"
android:singleLine="true" >
EditText>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal"
>
<TextView
android:id="@+id/stu_email"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="@string/stu_email" />
<EditText
android:id="@+id/edit_email"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="left|center_vertical"
android:layout_weight="1"
android:inputType="textEmailAddress"
android:hint="@string/hint_email"
android:singleLine="true" >
EditText>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="right|bottom"
>
<Button
android:id="@+id/btn_enregister"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/btn_enregister"
style="?android:attr/buttonStyle"
android:onClick="click_enregister"/>
<Button
android:id="@+id/btn_restting"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/btn_resetting"
style="?android:attr/buttonStyle"
android:onClick="click_restting"/>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/stu_result"
android:layout_width="match_parent"
android:layout_height="20dp"
android:text="@string/stu_result" />
<TextView
android:id="@+id/txt_result"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:singleLine="false" />
LinearLayout>
LinearLayout>
MainActivity.java
package com.example.shiyan0301;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
private EditText edit_no;
private EditText edit_name;
private EditText edit_sex;
private EditText edit_birthday;
private EditText edit_class;
private EditText edit_email;
private TextView result;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edit_no = (EditText)findViewById(R.id.edit_no);
edit_name = (EditText)findViewById(R.id.edit_name);
edit_sex = (EditText)findViewById(R.id.edit_sex);
edit_birthday = (EditText)findViewById(R.id.edit_birthday);
edit_class = (EditText)findViewById(R.id.edit_class);
edit_email = (EditText)findViewById(R.id.edit_email);
result = (TextView)findViewById(R.id.txt_result);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
//点击事件方式一：指定Button的onClick属性方式
public void click_enregister(View v) {
String txt = "学号：" + edit_no.getText().toString() + "\t姓名：" + edit_name.getText().toString()
+ "\t性别：" + edit_sex.getText().toString() + "\t出生年月：" + edit_birthday.getText().toString()
+ "\t专业班级：" + edit_class.getText().toString() + "\t电子邮箱：" + edit_email.getText().toString();
result.setText(txt);
}
public void click_restting(View v) {
edit_no.setText("");
edit_name.setText("");
edit_sex.setText("");
edit_birthday.setText("");
edit_class.setText("");
edit_email.setText("");
result.setText("");
}
}
3.简易计算器
string.xml
<string name="title">计算器string>
<string name="num_1">运算数一：string>
<string name="num_2">运算数二：string>
<string name="result">运算结果：string>
<string name="add">加(+)string>
<string name="sub">减(-)string>
<string name="mul">乘(×)string>
<string name="div">除(÷)string>
<string name="empty">清空string>
<string name="hint_num_1">请输入数一string>
<string name="hint_num_2">请输入数二string>
activity_main.xml
<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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:orientation="vertical"
android:gravity="center" >
<TextView
android:id="@+id/txt_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="22sp"
android:layout_marginBottom="20dp"
android:text="@string/title"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<TextView
android:id="@+id/txt_num1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/num_1"
/>
<EditText
android:id="@+id/edit_num1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:inputType="number"
android:layout_weight="1"
android:hint="@string/hint_num_1"/>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<TextView
android:id="@+id/txt_num2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/num_1"
/>
<EditText
android:id="@+id/edit_num2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:inputType="number"
android:layout_weight="1"
android:hint="@string/hint_num_2"/>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<TextView
android:id="@+id/txt_result"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/result"
/>
<EditText
android:id="@+id/edit_result"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:enabled="false"
/>
LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
>
<Button
android:id="@+id/btn_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/add"
style="?android:attr/buttonStyle"/>
<Button
android:id="@+id/btn_sub"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/sub"
style="?android:attr/buttonStyle"/>
<Button
android:id="@+id/btn_mul"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/mul"
style="?android:attr/buttonStyle"/>
<Button
android:id="@+id/btn_div"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/div"
style="?android:attr/buttonStyle"/>
LinearLayout>
<Button
android:id="@+id/btn_empty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/empty"
android:layout_gravity="right"/>
LinearLayout>
MainActivity.java
package com.example.shiyan0303;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
EditText edit_num1,edit_num2;
EditText edit_result;
Button btn[] = new Button[5];
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edit_num1 = (EditText)findViewById(R.id.edit_num1);
edit_num2 = (EditText)findViewById(R.id.edit_num2);
edit_result = (EditText)findViewById(R.id.edit_result);
btn[0] = (Button)findViewById(R.id.btn_add);
btn[1] = (Button)findViewById(R.id.btn_sub);
btn[2] = (Button)findViewById(R.id.btn_mul);
btn[3] = (Button)findViewById(R.id.btn_div);
btn[4] = (Button)findViewById(R.id.btn_empty);
for(int i = 0; i < btn.length; i++) {
btn[i].setOnClickListener(new cmomputeListened(i));;
}
}
class cmomputeListened implements OnClickListener {
int num;
float num1,num2;
public cmomputeListened(int i) {
num = i;
}
@Override
public void onClick(View v) {
if(num == 0) {
num1 = Float.valueOf(edit_num1.getText().toString()).intValue();
num2 = Float.valueOf(edit_num2.getText().toString()).intValue();
edit_result.setText(String.valueOf(num1 + num2));
}else if(num == 1) {
num1 = Float.valueOf(edit_num1.getText().toString()).intValue();
num2 = Float.valueOf(edit_num2.getText().toString()).intValue();
edit_result.setText(String.valueOf(num1 - num2));
}else if (num == 2) {
num1 = Float.valueOf(edit_num1.getText().toString()).intValue();
num2 = Float.valueOf(edit_num2.getText().toString()).intValue();
edit_result.setText(String.valueOf(num1 * num2));
}else if(num == 3){
num1 = Float.valueOf(edit_num1.getText().toString()).intValue();
num2 = Float.valueOf(edit_num2.getText().toString()).intValue();
if(num2 == 0) {
Toast.makeText(MainActivity.this, "除数不能为0", Toast.LENGTH_SHORT).show();
}else {
edit_result.setText(String.valueOf(num1 / num2));
}
}else {
edit_num1.setText("");
edit_num2.setText("");
edit_result.setText("");
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
总结
提示：请勿全部搬迁，稍作修改稍作修改稍作修改稍作修改啊啊啊啊~~~~~