Choose background color

app/src/main/java/me/jj97181818/ch05_foodmenueventhw/MainActivity.java

@@ -1,21 +1,28 @@
 package me.jj97181818.ch05_foodmenueventhw;
 
+import android.graphics.Color;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
+import android.widget.RadioGroup;
 import android.widget.TextView;
 
 import java.util.ArrayList;
 
-public class MainActivity extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {
+public class MainActivity extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener, RadioGroup.OnCheckedChangeListener {
+
+    RadioGroup unit;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
+        unit = (RadioGroup) findViewById(R.id.unit);
+        unit.setOnCheckedChangeListener(this);
+
         int [] chk_id = {R.id.chk1, R.id.chk2,  R.id.chk3, R.id.chk4, R.id.chk5, R.id.chk6};
 
         //註冊每個方塊的監聽事件
@@ -33,15 +40,6 @@ public class MainActivity extends AppCompatActivity implements CompoundButton.On
             selected.add(buttonView);
         else
             selected.remove(buttonView);
-
-//        if (buttonView.getId() == R.id.bgGreen) {
-//            View bg = findViewById(R.id.bg);
-//            if (isChecked)
-//                bg.setBackgroundColor(Color.rgb(255,0, 0));
-//            else
-//                bg.setBackgroundColor(Color.rgb(255, 255, 255));
-//            return;
-//        }
     }
 
     public void  takeOrder(View v) {
@@ -49,15 +47,15 @@ public class MainActivity extends AppCompatActivity implements CompoundButton.On
 
         if (selected.size() == 3) {
             for (CompoundButton chk:selected)
-                msg += "\n" + chk.getText();
+                msg += " " + chk.getText();
 
-            msg = "你點購的餐點是：" + msg + "\n總共是 50 元。";
+            msg = "你點購的餐點是：" + msg + "，總共是 50 元。";
         }
         else if (selected.size() == 4) {
             for (CompoundButton chk:selected)
-                msg += "\n" + chk.getText();
+                msg += " " + chk.getText();
 
-            msg = "你點購的餐點是：" + msg + "\n總共是 60 元。";
+            msg = "你點購的餐點是：" + msg + "，總共是 60 元。";
         }
         else if (selected.size() == 0){
             msg = "請點餐！";
@@ -70,12 +68,31 @@ public class MainActivity extends AppCompatActivity implements CompoundButton.On
         }
 
 
-
-//        if(msg.length() > 0)
-//
-//        else
-//            msg = "請點餐！";
-
         ((TextView) findViewById(R.id.showOrder)).setText(msg);
     }
+
+    @Override
+    public void onCheckedChanged(RadioGroup group, int checkedId) {
+        change();
+        return;
+    }
+
+    public void change () {
+        View bg =  findViewById(R.id.bg);
+//        RadioGroup unit = (RadioGroup) findViewById(R.id.unit);
+        switch (unit.getCheckedRadioButtonId()) {
+            case R.id.bgRed:
+                bg.setBackgroundColor(Color.rgb(211, 127, 129));
+                break;
+            case R.id.bgGreen:
+                bg.setBackgroundColor(Color.rgb(90, 176, 120));
+                break;
+            case R.id.bgBlue:
+                bg.setBackgroundColor(Color.rgb(143, 188, 237));
+                break;
+            case R.id.bgWhite:
+                bg.setBackgroundColor(Color.rgb(255,255, 255));
+                break;
+        }
+    }
 }

app/src/main/res/layout/activity_main.xml

@@ -56,6 +56,30 @@
         app:layout_constraintStart_toEndOf="@+id/chk3"
         app:layout_constraintTop_toBottomOf="@+id/chk2" />
 
+    <CheckBox
+        android:id="@+id/chk5"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="7dp"
+        android:layout_marginTop="17dp"
+        android:text="豬血糕"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toStartOf="@+id/chk6"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/chk3" />
+
+    <CheckBox
+        android:id="@+id/chk6"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="17dp"
+        android:layout_marginEnd="25dp"
+        android:text="牛排"
+        android:textSize="30sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@+id/chk5"
+        app:layout_constraintTop_toBottomOf="@+id/chk4" />
+
     <Button
         android:id="@+id/button"
         android:layout_width="0dp"
@@ -83,39 +107,54 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/button" />
 
-    <RadioButton
+    <RadioGroup
-        android:id="@+id/bgGreen"
+        android:id="@+id/unit"
-        android:layout_width="wrap_content"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
-        android:layout_marginTop="70dp"
+        android:layout_marginStart="8dp"
-        android:layout_marginBottom="70dp"
+        android:layout_marginTop="8dp"
-        android:text="背景顏色"
+        android:layout_marginEnd="8dp"
+        android:layout_marginBottom="8dp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/showOrder" />
+        app:layout_constraintTop_toBottomOf="@+id/showOrder"
+        app:layout_constraintVertical_bias="0.36"
+        tools:orientation="horizontal">
 
-    <CheckBox
+        <RadioButton
-        android:id="@+id/chk5"
+            android:id="@+id/bgRed"
-        android:layout_width="wrap_content"
+            android:layout_width="50dp"
-        android:layout_height="wrap_content"
+            android:layout_height="wrap_content"
-        android:layout_marginStart="7dp"
+            android:text="紅"
-        android:layout_marginTop="17dp"
+            tools:layout_editor_absoluteX="44dp"
-        android:text="豬血糕"
+            tools:layout_editor_absoluteY="415dp"
-        android:textSize="30sp"
+            tools:layout_marginRight="8dp" />
-        app:layout_constraintEnd_toStartOf="@+id/chk6"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/chk3" />
 
-    <CheckBox
+        <RadioButton
-        android:id="@+id/chk6"
+            android:id="@+id/bgGreen"
-        android:layout_width="wrap_content"
+            android:layout_width="50dp"
-        android:layout_height="wrap_content"
+            android:layout_height="wrap_content"
-        android:layout_marginTop="17dp"
+            android:text="綠"
-        android:layout_marginEnd="25dp"
+            tools:layout_editor_absoluteX="125dp"
-        android:text="牛排"
+            tools:layout_editor_absoluteY="415dp"
-        android:textSize="30sp"
+            tools:layout_marginRight="8dp" />
-        app:layout_constraintEnd_toEndOf="parent"
+
-        app:layout_constraintStart_toEndOf="@+id/chk5"
+        <RadioButton
-        app:layout_constraintTop_toBottomOf="@+id/chk4" />
+            android:id="@+id/bgBlue"
+            android:layout_width="50dp"
+            android:text="藍"
+            tools:layout_editor_absoluteX="208dp"
+            tools:layout_editor_absoluteY="415dp" />
+
+        <RadioButton
+            android:id="@+id/bgWhite"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="白"
+            tools:layout_editor_absoluteX="292dp"
+            tools:layout_editor_absoluteY="415dp" />
+    </RadioGroup>
 </android.support.constraint.ConstraintLayout>