View를 상속받은 클래스를 만들어서 inflate를 해준다
미리 자신이 준비한 그림파일들을 drawble 폴더에 넣어주자
파일 Ctrl+C 해주고 자기만의 IDE에서 drawable 폴더를 선택한 채로 Ctrl+V해주면 된다
- 이름을 클릭하면 원본 크기로 파일을 다운받을 수 있다
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.boki.miniphotoshop">
<application
android:allowBackup="true"
android:icon="@drawable/lena256"
android:hardwareAccelerated="false"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
activity_main.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/ibGray"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/gray"/>
</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>
package 부분은 개개인마다 다르므로 import 구문부터 복사하는 것을 권장한다
추가로 MainActivity이름도 다를 수 있기때문에 주의해서 복사하고, 복사보다는 직접 쳐보는 것을 권장하는 바이다
MainActivity.java
package com.example.boki.miniphotoshop;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;
import android.support.v7.app.AppCompatActivity;
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, ibGray;
MyGraphicView graphicView;
static float scaleX = 1, scaleY = 1;
static float angle = 0;
static float color = 1;
static float satur = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setTitle("미니 포토샵");
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
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);
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();
}
}
}
실행화면
