[안드로이드 자바] 미니 포토샵 앱 만들기(ImageButton, 줌인, 줌아웃, 회전, 밝게, 어둡게, 블러, 엠보싱)

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프로젝트 설명

각 이미지버튼을 누르면 줌인(확대), 줌아웃(축소), 회전, 밝게, 어둡게, 블러, 엠보싱 기능을 수행한다

 

xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout android:id="@+id/iconLayout"
        android:layout_width="fill_parent"
        android:layout_height="0dip"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="horizontal">

        <ImageButton android:id="@+id/ibZoomin"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/zoom_in"/>

        <ImageButton android:id="@+id/ibZoomout"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/zoom_out"/>

        <ImageButton android:id="@+id/ibRotate"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/rotate"/>

        <ImageButton android:id="@+id/ibBright"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/bright"/>

        <ImageButton android:id="@+id/ibDark"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/dark"/>

        <ImageButton android:id="@+id/ibBlur"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/blur"/>

        <ImageButton android:id="@+id/ibEmbos"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/embos"/>

    </LinearLayout>

    <LinearLayout android:id="@+id/pictureLayout"
        android:layout_width="fill_parent"
        android:layout_height="0dip"
        android:layout_weight="9"
        android:gravity="center"
        android:orientation="horizontal">
    </LinearLayout>

</LinearLayout>

 

java

package com.sample.miniphotoshop;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.EmbossMaskFilter;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

    ImageButton ibZoomin, ibZoomout, ibRotate, ibBright, ibDark, ibBlur, ibEmbos, ibGray;
    MyGraphicView graphicView;
    static float scaleX = 1, scaleY = 1;
    static float angle = 0;
    static float color = 1;
    static float satur = 1;
    static boolean blur = false;
    static boolean embos = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("미니 포토샵(개선)");

        LinearLayout pictureLayout = (LinearLayout)findViewById(R.id.pictureLayout);
        graphicView = (MyGraphicView) new MyGraphicView(this);
        pictureLayout.addView(graphicView);
//        setContentView(new MyGraphicView(this));
        clickIcons(); // 6개 아이콘을 클릭했을 때 수행할 기능을 메소드로 정의함
    } //onCreate

    private void clickIcons() {
        ibZoomin = (ImageButton)findViewById(R.id.ibZoomin);
        ibZoomin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                scaleX += 0.2f;
                scaleY += 0.2f;
                graphicView.invalidate();
            }
        }); // 확대아이콘 클릭리스너

        ibZoomout = (ImageButton)findViewById(R.id.ibZoomout);
        ibZoomout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                scaleX -= 0.2f;
                scaleY -= 0.2f;
                graphicView.invalidate();
            }
        }); // 축소아이콘 클릭리스너

        ibRotate = (ImageButton)findViewById(R.id.ibRotate);
        ibRotate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                angle += 20;
                graphicView.invalidate();
            }
        }); // 회전아이콘 클릭리스너

        ibBright = (ImageButton)findViewById(R.id.ibBright);
        ibBright.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                color += 0.2f;
                graphicView.invalidate();
            }
        }); // 밝기아이콘 클릭리스너

        ibDark = (ImageButton)findViewById(R.id.ibDark);
        ibDark.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                color -= 0.2f;
                graphicView.invalidate();
            }
        }); // 어둡게아이콘 클릭리스너

        ibBlur = (ImageButton)findViewById(R.id.ibBlur);
        ibBlur.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (blur == true) {
                    blur = false;
                }
                else {
                    blur = true;
                }
                graphicView.invalidate();
            }
        }); // 블러아이콘 클릭리스너

        ibEmbos = (ImageButton)findViewById(R.id.ibEmbos);
        ibEmbos.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (embos == true) {
                    embos = false;
                }
                else {
                    embos = true;
                }
                graphicView.invalidate();
            }
        }); // 엠보싱아이콘 클릭리스너

        /*
        ibGray = (ImageButton)findViewById(R.id.ibGray);
        ibGray.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (satur == 0) {
                    satur = 1;
                }
                else satur = 0;
                graphicView.invalidate();
            }
        }); // 흑백아이콘 클릭리스너
         */
    }

    //TODO 임의 View클래스 만들기
    private static class MyGraphicView extends View {
        public MyGraphicView(Context context) {
            super(context);
        }

        @Override
        protected void onDraw(Canvas canvas) {
            super.onDraw(canvas);

            int cenX = this.getWidth() / 2;
            int cenY = this.getHeight() / 2;
            canvas.scale(scaleX, scaleY, cenX, cenY);
            canvas.rotate(angle, cenX, cenY);

            Paint paint = new Paint();
            float[] array = {
                    color, 0, 0, 0, 0,
                    0, color, 0, 0, 0,
                    0, 0, color, 0, 0,
                    0, 0, 0, 1, 0
            };
            ColorMatrix cm = new ColorMatrix(array);

            if(satur == 0)
                cm.setSaturation(satur);

            if (blur == true) {
                BlurMaskFilter bMask;
                bMask = new BlurMaskFilter(30, BlurMaskFilter.Blur.NORMAL);
                paint.setMaskFilter(bMask);
            }

            if (embos == true) {
                EmbossMaskFilter eMask;
                eMask = new EmbossMaskFilter(new float[] {3,3,3}, 0.5f, 5, 10);
                paint.setMaskFilter(eMask);
            }

            paint.setColorFilter(new ColorMatrixColorFilter(cm)); // paint 이게 satur 밑에 있어야 작동함

            Bitmap picture = BitmapFactory.decodeResource(getResources(), R.drawable.lena256);
            int picX = (this.getWidth() - picture.getWidth()) / 2;
            int picY = (this.getHeight() - picture.getHeight()) / 2;
            canvas.drawBitmap(picture, picX, picY, paint);
            picture.recycle();

        }
    }
}