Android Open Source - SampleCustomView Custom View

• Back to Development/studio  ↑

From Project

Back to project page SampleCustomView.

License

The source code is released under:

Apache License

Java Source Code

package com.imran.samplecustomview;
//from   www.  j a  v  a  2s .c o m
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

/**
 * Created by imranmohammed on 04/10/13.
 */
public class CustomView extends View {

    Paint mPaint;
    float left = 100, top = 100;
    int width = 200, height = 200;
    RectF mRectF;

    String[] mColorSet = {"Yellow","Blue","Red","Dark Gray"};

    int mColors[] = {Color.YELLOW, Color.BLUE, Color.RED, Color.DKGRAY};
    int mColorPosition = 0;
    private OnColorChangeListener mColorChangedListener;

    public static interface OnColorChangeListener{
        public void onColorChanged(String color);
    }

    public CustomView(Context context) {
        super(context);
        init();
    }

    public CustomView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public CustomView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    /**
     * Initialize View
     */
    void init(){

        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setStyle(Paint.Style.FILL_AND_STROKE);
        mPaint.setStrokeWidth(10);
        mRectF = new RectF(left, top, left + width, top + height);
    }

    public void setOnColorChangedListener(OnColorChangeListener listener){
        this.mColorChangedListener = listener;
    }

    /** Attachment **/
    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
    }

    /** Drawing - draw anything**/
    @Override
    protected void onDraw(Canvas canvas) {
        mPaint.setColor(mColors[mColorPosition]);
        canvas.drawRoundRect(mRectF, 6, 6, mPaint);
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
    }

    /** Touch Events **/
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        float x, y;

        switch (event.getAction()){
            case MotionEvent.ACTION_DOWN:
                break;

            case MotionEvent.ACTION_UP:
                x = event.getX();
                y = event.getY();

                /**
                 * Calculations to show you how internal calculations are done.
                 *
                 * Try mRectF.contains(x, y); for better usage.
                 */

                if(x >= left && x <= left + width){
                    if(y >= top && y<= top + height){
                        setBackgroundColor(mColors[mColorPosition]);
                        if(mColorChangedListener != null)
                            mColorChangedListener.onColorChanged(mColorSet[mColorPosition]);
                        mColorPosition++;
                        if(mColorPosition == mColors.length)mColorPosition = 0;
                        invalidate();
                    }
                }
                break;

            case MotionEvent.ACTION_MOVE:
                break;
        }

        return true;

    }
}

Java Source Code List

• Back to Development/studio  ↑