Android Option Menu example

Android 에서 제공하는 2가지 형태의 메뉴 중에서 Option Menu의 예

메뉴를 선택할 때마다 이미지의 축소 및 확대, 이미지의 회전이 수행된다

main.xml

<?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" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:scaleType="matrix"
        android:src="@drawable/mountain" />

</LinearLayout>

OptionMenuDemo.java

package com.example.androidtest;

import android.app.*;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.*;

public class OptionMenuDemo extends Activity {

	ImageView imageView;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.seekbar_main);
		imageView = (ImageView) findViewById(R.id.imageView1);
	}

	static final int ID_HALF = Menu.FIRST+1;
	static final int ID_ORIGIN = Menu.FIRST+2;
	static final int ID_CW45 = Menu.FIRST+3;
	static final int ID_CW90 = Menu.FIRST+4;
	static final int ID_CW180 = Menu.FIRST+5;
	static final int ID_CCW45 = Menu.FIRST+6;
	static final int ID_CCW90 = Menu.FIRST+7;
	static final int ID_CCW180 = Menu.FIRST+8;
	static final int ID_NO_ROT = Menu.FIRST+9;

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add(Menu.NONE, ID_HALF, Menu.NONE, "50%");
		menu.add(Menu.NONE, ID_ORIGIN, Menu.NONE, "100%");

		menu.add(Menu.NONE, ID_CW45, Menu.NONE, "CW 45");
		menu.add(Menu.NONE, ID_CW90, Menu.NONE, "CW 90");
		menu.add(Menu.NONE, ID_CW180, Menu.NONE, "CW 180");
		menu.add(Menu.NONE, ID_CCW45, Menu.NONE, "CCW 45");
		menu.add(Menu.NONE, ID_CCW90, Menu.NONE, "CCW 90");
		menu.add(Menu.NONE, ID_CCW180, Menu.NONE, "CCW 180");
		menu.add(Menu.NONE, ID_NO_ROT, Menu.NONE, "NO Rotation");
		return super.onCreateOptionsMenu(menu);
	}
	
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch(item.getItemId()) {
		case ID_HALF :
			changeScale(0.5f);
			break;
		case ID_ORIGIN:
			changeScale(1f);
			break;
		case ID_CW45:
			rotateImage(45);
			break;
		case ID_CW90:
			rotateImage(90);
			break;
		case ID_CW180:
			rotateImage(180);
			break;
		case ID_CCW45:
			rotateImage(-45);
			break;
		case ID_CCW90:
			rotateImage(-90);
			break;
		case ID_CCW180:
			rotateImage(-180);
			break;
		case ID_NO_ROT:
			rotateImage(0);
			break;
		}
		return super.onOptionsItemSelected(item);
	}
	
	public void changeScale(float scale) {
		Matrix matrix = new Matrix();
		matrix.postScale(scale, scale);
		imageView.setImageMatrix(matrix);
	}
	
	public void rotateImage(float deg) {
	  Bitmap myImg = BitmapFactory.decodeResource(getResources(), R.drawable.mountain);
	  Matrix matrix = new Matrix();
	  matrix.postRotate(deg);
          Bitmap rotated = Bitmap.createBitmap(myImg, 0, 0, myImg.getWidth(), myImg.getHeight(),matrix, true);
	  imageView.setImageBitmap(rotated);
	}
}