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Android Studio 10일차

2021. 11. 12. 17:43ㆍAndroid Development

간단 그림판 ver2.

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;

import java.util.ArrayList;
import java.util.List;


public class MainActivity extends AppCompatActivity {
    //static : 공유,객체 생성 이전에 메모리 할당.
    final int LINE = 1, CIRCLE = 2;
    // 상수
    int curShape = LINE;// 현재 도형
    List<MyShape> myshape = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_main);
        setContentView(new MyGraphicView(this));
        setTitle("간단 그림판");
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        menu.add(0, 1, 0, "선 그리기");
        menu.add(0, 2, 0, "원 그리기");
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()) {
            case 1:
                curShape = LINE; // 선
                return true;
            case 2:
                curShape = CIRCLE; // 원
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private class MyGraphicView extends View {
        int startX = -1, startY = -1, stopX = -1, stopY = -1;

        // 좌표상 없는 값을 주고, 드래그시 실제 값으로 대체
        public MyGraphicView(Context context) {
            super(context);
        }

        @Override
        public boolean onTouchEvent(MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    startX = (int) event.getX();
                    startY = (int) event.getY();
                    // 터치 다운시 시작 좌표 초기화
                    break;
                case MotionEvent.ACTION_MOVE:
                case MotionEvent.ACTION_UP:
                    stopX = (int) event.getX();
                    stopY = (int) event.getY();

                    MyShape shape = new MyShape();
                    shape.ShapeType = curShape;
                    shape.startX = startX;
                    shape.startY = startY;
                    shape.stopX = stopX;
                    shape.stopY = stopY;
                    myshape.add(shape);

                    this.invalidate();
                    break;
            }
            return true;
        }

        @Override
        protected void onDraw(Canvas canvas) {
            super.onDraw(canvas);
            Paint paint = new Paint();
            paint.setAntiAlias(true);
            paint.setStrokeWidth(5);
            paint.setStyle(Paint.Style.STROKE);
            paint.setColor(Color.RED);

            for (int i = 0; i < myshape.size(); i++) {
                MyShape shape = myshape.get(i);

                switch (shape.ShapeType) {
                    case LINE:
                        canvas.drawLine(shape.startX, shape.startY, shape.stopX, shape.stopY, paint);
                        break;
                    case CIRCLE:
                        // Constant expression required
                        int radius = (int) Math.sqrt(Math.pow(shape.stopX - shape.startX, 2)
                                + Math.pow(shape.stopY - shape.startY, 2));
                        canvas.drawCircle(shape.startX, shape.startY, radius, paint);
                        break;
                }
            }

        }
    }
}

MainActivity

public class MyShape {
    int ShapeType;
    int startX, startY, stopX, stopY;
}

MyShape 클래스 생성해서 그림들을 배열에 담아

터치 이벤트마다 뿌려줌.

이미지의 기하학적 변화주기

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;

import java.util.ArrayList;
import java.util.List;


public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.activity_main);
        setContentView(new MyGraphicView(this));
    }

    private class MyGraphicView extends View {

        public MyGraphicView(Context context) {
            super(context);
        }

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

            Bitmap picture = BitmapFactory.decodeResource(getResources(), R.drawable.testimage);

            int cenX = this.getWidth() / 2;
            int cenY = this.getHeight() / 2;
            int picX = (this.getWidth() - picture.getWidth()) / 2;
            int picY = (this.getHeight() - picture.getHeight()) / 2;

//            canvas.rotate(45, cenX, cenY);
//            canvas.drawBitmap(picture, picX, picY, null);//회전

//            canvas.translate(-150, 200);
//            canvas.drawBitmap(picture, picX, picY, null);//위치 이동

//            canvas.scale(2, 2, cenX, cenY);
//            canvas.drawBitmap(picture, picX, picY, null);//확대

            canvas.skew(0.3f, 0.3f);
            canvas.drawBitmap(picture, cenX, cenY, null);//비틀기

            picture.recycle();
        }
    }
}

블러링 효과주기

package com.example.test24;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;

import java.util.ArrayList;
import java.util.List;


public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.activity_main);
        setContentView(new MyGraphicView(this));
    }

    private class MyGraphicView extends View {

        public MyGraphicView(Context context) {
            super(context);
        }

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

            Bitmap picture = BitmapFactory.decodeResource(getResources(), R.drawable.lena256);

            int picX = (this.getWidth() - picture.getWidth()) / 2;
            int picY = (this.getHeight() - picture.getHeight()) / 2;

            Paint paint = new Paint();
            BlurMaskFilter bMask;

            bMask = new BlurMaskFilter(30, BlurMaskFilter.Blur.INNER);
//            BlurMaskFilter.Blur.NORMAL //테두리 흐릿
//            BlurMaskFilter.Blur.INNER // 입체 액자처럼 안쪽으로만 입체감 표시
//            BlurMaskFilter.Blur.OUTER //      ' '	    바깥쪽으로만 입체감 표시
//            BlurMaskFilter.Blur.SOLID // 
            paint.setMaskFilter(bMask); // 테두리 선을 강조하면서 블러 효과
            canvas.drawBitmap(picture, picX, picY, paint);

            picture.recycle();
        }
    }
}

설정 안될시 AndroidMenifest 에서 하드웨어 가속 false로 설정

엠보싱 효과 주기

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.EmbossMaskFilter;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.activity_main);
        setContentView(new MyGraphicView(this));
    }

    private 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;
            int cenY=200;

            Paint paint = new  Paint();
            paint.setColor(Color.GRAY);
            EmbossMaskFilter eMask;

            eMask = new EmbossMaskFilter(new float[] { 3, 3, 3 }
            , 0.5f, 5, 10);
            // EmbossMaskFilter(xyz 빛의 방향, 빛의 밝기, 반사 계수, 블러링 크기);
            paint.setMaskFilter(eMask);
            canvas.drawCircle(cenX, cenY, 150, paint);

            eMask = new EmbossMaskFilter(new float[] { 3, 3, 3 }
                    , 0.5f, 5, 10);
            // EmbossMaskFilter(xyz 빛의 방향, 빛의 밝기, 반사 계수, 블러링 크기);
            paint.setMaskFilter(eMask);
            canvas.drawCircle(cenX, cenY+400, 150, paint);

            eMask = new EmbossMaskFilter(new float[] { 3, 3, 3 }
                    , 0.5f, 5, 10);
            // EmbossMaskFilter(xyz 빛의 방향, 빛의 밝기, 반사 계수, 블러링 크기);
            paint.setMaskFilter(eMask);
            canvas.drawCircle(cenX, cenY+800, 150, paint);

            eMask = new EmbossMaskFilter(new float[] { 3, 3, 3 }
                    , 0.5f, 5, 10);
            // EmbossMaskFilter(xyz 빛의 방향, 빛의 밝기, 반사 계수, 블러링 크기);
            paint.setMaskFilter(eMask);
            canvas.drawCircle(cenX, cenY+1200, 150, paint);
        }
    }
}

미니 포토샵 만들기.

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BlurMaskFilter;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.EmbossMaskFilter;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageButton;
import android.widget.LinearLayout;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    ImageButton ibZoomin, ibZoomout, ibRotate, ibBlur, ibEmboss;
    MyGraphicView graphicView;
    float scaleX = 1, scaleY = 1, angle = 0;
    boolean blur = false, embos = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("미니 포토샵 5555");
        LinearLayout pictureLayout = findViewById(R.id.pictureLayout);
        graphicView = new MyGraphicView(this);
        pictureLayout.addView(graphicView);
        ibZoomin = findViewById(R.id.ibZoomIn);
        ibZoomout = findViewById(R.id.ibZoomOut);
        ibRotate = findViewById(R.id.ibRotate);
        ibBlur = findViewById(R.id.ibBlur);
        ibEmboss = findViewById(R.id.ibEmbos);
        ibZoomin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                scaleX = scaleX + 0.2f;
                scaleY = scaleY + 0.2f;
                graphicView.invalidate();
            }
        });
        ibZoomout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                
                scaleX = scaleX - 0.2f;
                scaleY = scaleY - 0.2f;
                graphicView.invalidate();
            }
        });
        ibRotate.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                angle = angle + 20;
                graphicView.invalidate();
            }
        });
        ibBlur.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (blur == true)
                    blur = false;
                else
                    blur = true;
                graphicView.invalidate();
            }
        });
        ibEmboss.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (embos == true)
                    embos = false;
                else
                    embos = true;
                graphicView.invalidate();
            }
        });
    }

    private 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();
            if (blur == true) {
                BlurMaskFilter bMask;
                bMask = new BlurMaskFilter(50, BlurMaskFilter.Blur.NORMAL);
                paint.setMaskFilter(bMask);
            }
            if (embos == true) {
                EmbossMaskFilter eMask;
                eMask = new EmbossMaskFilter(new float[]{1, 5, 1}
                        , 0.5f, 5, 50);
                paint.setMaskFilter(eMask);
            }
            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();
        }
    }
}

액티비티를 사용한 선호도 투표.

내일 계속

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