android - context 메뉴 추가

파일명 : activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/baseLayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="배경색 변경" />
    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="버튼 변경" />

</LinearLayout>

파일명 : menu1.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/itemRed"
        android:title="배경색 (빨강)" >
    </item>
    <item
        android:id="@+id/itemGreen"
        android:title="배경색 (초록)" >
    </item>
    <item
        android:id="@+id/itemBlue"
        android:title="배경색 (파랑)" >
    </item>

</menu>

파일명 : menu2.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/subRotate"
        android:title="버튼 45도 회전" />
    <item
        android:id="@+id/subSize"
        android:title="버튼 2배 확대" />

</menu>

파일명 : MainActivity.java

package com.example.it.myapplication7_3;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

    LinearLayout baseLayout;
    Button button1, button2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("배경색 바꾸기(컨텍스트 메뉴)");

        baseLayout = (LinearLayout) findViewById(R.id.baseLayout);
        button1 = (Button) findViewById(R.id.button1);
        registerForContextMenu(button1);

        button2 = (Button) findViewById(R.id.button2);
        registerForContextMenu(button2);
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);

        MenuInflater mIn = getMenuInflater();
        if (v == button1) {
            menu.setHeaderTitle("배경색 변경");
            mIn.inflate(R.menu.menu1, menu);
        }

        if (v == button2) {
            mIn.inflate(R.menu.menu2, menu);
        }
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.itemRed:
                baseLayout.setBackgroundColor(Color.RED);
                return true;
            case R.id.itemGreen:
                baseLayout.setBackgroundColor(Color.GREEN);
                return true;
            case R.id.itemBlue:
                baseLayout.setBackgroundColor(Color.BLUE);
                return true;
            case R.id.subRotate:
                button2.setRotation(45);
                return true;
            case R.id.subSize:
                button2.setScaleX(2);
                return true;
        }
        return false;
    }
}