예제: RadioButton,CheckBoxm,ImageView,Spinner

#1 java

package com.example.a_2;   import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.CheckBox; import android.widget.EditText; import android.widget.ImageView; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.Spinner; import android.widget.TextView;       public class MainActivity extends AppCompatActivity { EditText edt1,edt2; RadioGroup group; RadioButton g1,g2; Spinner sp1; CheckBox chk1,chk2,chk3; TextView txt1,txt2; ImageView img; Button btn1; String[] item; String gender = ""; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);   edt1 = (EditText)findViewById(R.id.edt1); edt2 = (EditText)findViewById(R.id.edt2); group = (RadioGroup)findViewById(R.id.group); chk1 = (CheckBox)findViewById(R.id.chk1); chk2 = (CheckBox)findViewById(R.id.chk2); chk3 = (CheckBox)findViewById(R.id.chk3); txt1 = (TextView)findViewById(R.id.txt1); txt2 = (TextView)findViewById(R.id.txt2); img = (ImageView)findViewById(R.id.img); sp1 = (Spinner)findViewById(R.id.sp1); btn1 = (Button)findViewById(R.id.btn1); g1 = (RadioButton)findViewById(R.id.g1); g2 = (RadioButton)findViewById(R.id.g2);   item = new String[]{"선택하세요","A","B","O","AB"}; ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); sp1.setAdapter(adapter);   btn1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { group.setOnCheckedChangeListener(mck); int tall = Integer.parseInt(edt1.getText().toString()); int weight = Integer.parseInt(edt2.getText().toString()); double rat = weight/Math.pow((tall/100),2); String str = Double.toString(rat); txt1.setText("1. 혈액형은 "+sp1.getSelectedItem().toString()+"형 이고 " +gender+"입니다."); txt2.setText("2. 신체질량지수는 "+ str+"입니다."); if(chk1.isChecked()){ img.setImageResource(R.drawable.drinking); }else if(chk2.isChecked()){ img.setImageResource(R.drawable.ciga); }else if(chk3.isChecked()){ img.setImageResource(R.drawable.running); } } });//btn1 }//onCreate   RadioGroup.OnCheckedChangeListener mck = new RadioGroup.OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup group, int checkedId) { if(group.getId()== R.id.group){ switch (checkedId){ case R.id.g1: gender="남자"; break; case R.id.g2: gender="여자"; break; } } } };//RadioG }

#2 xml

<?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:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1">   <TextView android:layout_width="50dp" android:layout_height="50dp" android:text="키: " />   <EditText android:id="@+id/edt1" android:layout_width="match_parent" android:layout_height="50dp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1"> <TextView android:layout_width="50dp" android:layout_height="50dp" android:text="몸무게: "/> <EditText android:id="@+id/edt2" android:layout_width="match_parent" android:layout_height="50dp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1"> <TextView android:layout_width="50dp" android:layout_height="50dp" android:text="성별: " /> <RadioGroup android:id="@+id/group" android:layout_width="match_parent" android:orientation="horizontal" android:layout_height="50dp"> <RadioButton android:id="@+id/g1" android:layout_width="100dp" android:layout_height="wrap_content" android:text="남자"/> <RadioButton android:id="@+id/g2" android:layout_width="100dp" android:layout_height="50dp" android:text="여자" /> </RadioGroup> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1"> <TextView android:layout_width="50dp" android:layout_height="50dp" android:text="혈액형: " /> <Spinner android:id="@+id/sp1" android:layout_width="wrap_content" android:layout_height="50dp" > </Spinner> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1"> <TextView android:layout_width="70dp" android:layout_height="50dp" android:text="생활 습관 : " /> <CheckBox android:id="@+id/chk1" android:layout_width="60dp" android:layout_height="50dp" android:text="음주"/> <CheckBox android:id="@+id/chk2" android:layout_width="60dp" android:layout_height="50dp" android:text="흡연"/> <CheckBox android:id="@+id/chk3" android:layout_width="60dp" android:layout_height="50dp" android:text="운동"/> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" android:orientation="vertical"> <Button android:id="@+id/btn1" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="몸상태 측정"/> </LinearLayout>   <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" android:orientation="vertical">   <TextView android:id="@+id/txt1" android:layout_width="wrap_content" android:layout_height="30dp" android:text="1." />   <TextView android:id="@+id/txt2" android:layout_width="wrap_content" android:layout_height="30dp" android:text="2." /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" android:orientation="vertical"> <ImageView android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="fill_parent" /> </LinearLayout> </LinearLayout>