开发笔记:Android02控件

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:orientation="vertical">
<RadioGroup
android:id="@+id/rg_radio_sex"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RadioButton
android:id="@+id/rb_radio_man"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="男" />
<RadioButton
android:id="@+id/rb_radio_woman"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="女"
android:checked="true"/>
RadioGroup>
<CheckBox
android:id="@+id/ck_radio_ck1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="吃饭" />
<CheckBox
android:id="@+id/ck_radio_ck2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="睡觉"
android:checked="true"/>
<CheckBox
android:id="@+id/ck_radio_ck3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="打豆豆" />
<Button
android:id="@+id/btn_radio_toast"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="显示你选择的性别信息 toast出来" />
<Button
android:id="@+id/btn_radio_check"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="显示多选选中的信息 toast出来" />
LinearLayout>

package com.example.administrator.myapplication;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private String str;
private CheckBox ck;
private RadioGroup rg_radio_sex;
private CheckBox ck2;
private CheckBox ck3;
private Button btn_radio_check;
private Button btn_radio_toast;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//1.当值被选中时弹出(用事件)
//获取控件
/* RadioGroup rg_radio_sex= (RadioGroup) findViewById(R.id.rg_radio_sex);
rg_radio_sex.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
RadioButton rb= (RadioButton) findViewById(i);
str=rb.getText().toString();
}
});
Button btn_radio_toast= (Button) findViewById(R.id.btn_radio_toast);
btn_radio_toast.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(RadioActivity.this,"选择的性别是："+str,Toast.LENGTH_SHORT).show();
}
});*/
ck = (CheckBox) findViewById(R.id.ck_radio_ck1);
ck2 = (CheckBox) findViewById(R.id.ck_radio_ck2);
ck3 = (CheckBox) findViewById(R.id.ck_radio_ck3);
rg_radio_sex = (RadioGroup) findViewById(R.id.rg_radio_sex);
btn_radio_toast = (Button) findViewById(R.id.btn_radio_toast);
btn_radio_toast.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//获取你选中的控件的id
int id = rg_radio_sex.getCheckedRadioButtonId();
RadioButton radioButton = (RadioButton) findViewById(id);
String str = radioButton.getText().toString();
Toast.makeText(MainActivity.this, "选择的性别是：" + str , Toast.LENGTH_SHORT).show();
}
});
btn_radio_check = (Button) findViewById(R.id.btn_radio_check);
btn_radio_check.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String ckstr = "";
if (ck.isChecked()) {
ckstr += ck.getText().toString();
}
if(ck2.isChecked()){
ckstr += ck2.getText().toString();
}
if(ck3.isChecked()){
ckstr += ck3.getText().toString();
}
Toast.makeText(MainActivity.this, "选择的内容是：" + ckstr, Toast.LENGTH_SHORT).show();
}
});
}
}

package com.example.administrator.myapplication;
import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TimePicker;
import android.widget.Toast;
import java.util.Calendar;
public class Main2Activity extends AppCompatActivity {
private Button btn_radio_time;
private Button btn_radio_day;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
//获取系统的时间 年 月 日 小时 分钟
Calendar calendar = Calendar.getInstance();
final int year = calendar.get(Calendar.YEAR);
final int mOnth= calendar.get(Calendar.MONTH);
final int day = calendar.get(Calendar.DAY_OF_MONTH);
final int hour = calendar.get(Calendar.HOUR_OF_DAY);
final int minute = calendar.get(Calendar.MINUTE);
//获取控件
btn_radio_time = (Button) findViewById(R.id.btn_radio_time);
btn_radio_time.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
TimePickerDialog timePickerDialog = new TimePickerDialog(Main2Activity.this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int i, int i1) {
Toast.makeText(Main2Activity.this, "选择的时间" + i + ":" + i1, Toast.LENGTH_SHORT).show();
}
}, hour, minute, true);
timePickerDialog.show();
}
});
btn_radio_day = (Button) findViewById(R.id.btn_radio_day);
btn_radio_day.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
DatePickerDialog dp=new DatePickerDialog(Main2Activity.this, new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker datePicker, int i, int i1, int i2) {
i1+=1;
Toast.makeText(Main2Activity.this,"当前日期:"+i+"年"+i1+"月"+i2+"日",Toast.LENGTH_LONG).show();
}
},year,month,day);
dp.show();
}
});
}
}

xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main2"
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"
android:orientation="vertical"
tools:context="com.example.administrator.myapplication.Main2Activity">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="时间选择"
android:id="@+id/btn_radio_time"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="日期选择"
android:id="@+id/btn_radio_day"/>
LinearLayout>