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java – 如何在画布中的现有矩形顶部添加…


我试图在现有画布中添加一些红色矩形,与特定的盒子一样,与预期的结果图像完全一样,但它们根本不显示,因为我的代码显示了部署应用程序时当前不需要的结果.我的代码是在顶行创建4个矩形,在底行创建4个矩形,但我只想在盒子2-6的顶部添加它,但我知道需要为盒子顶部的红色矩形添加额外的代码1& 7.有谁知道我做错了什么以及如何解决这个问题?所有帮助将不胜感激.

public class RectangleTextView extends View {
    private final Paint mBlackPaint = new Paint();
    private final Paint mRedPaint = new Paint();
    private final TextPaint mTextPaint;

    public RectangleTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        int valueInDp = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1, getResources().getDisplayMetrics());
        int valueInSp = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 20, getResources().getDisplayMetrics());

        mRedPaint.setColor(Color.parseColor("#CC3333"));

        mBlackPaint.setAntiAlias(false);
        mBlackPaint.setColor(Color.BLACK);
        mBlackPaint.setStrokeWidth(valueInDp);
        mBlackPaint.setStyle(Paint.Style.STROKE);

        mTextPaint = new TextPaint(TextPaint.ANTI_ALIAS_FLAG);
        mTextPaint.setColor(Color.BLACK);
        mTextPaint.setTextAlign(Paint.Align.CENTER);
        mTextPaint.setTextSize(valueInSp);

        mWindowPaint = new Paint();
        mWindowPaint.setColor(Color.parseColor("#CC3333"));
        mWindowPaint.setStrokeWidth(valueInDp);
    }

    private Paint mWindowPaint;

    @Override protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (getWidth() == 0)
            return;

        //initialise red rectangles
        int w = canvas.getWidth();
        int h = canvas.getHeight();

        int rectWidth = w / 5;
        int space = w / 15;
        int topRectHeight = getPaddingTop();
        int bottomRectHeight = getPaddingBottom();


        //draw end rectangles
        int mSideRectWidth = 10;
        canvas.drawRect(0, 0, mSideRectWidth, getHeight(), mRedPaint); //draw left end rectangle
        canvas.drawRect(getWidth() - mSideRectWidth, 0, getWidth(), getHeight(), mRedPaint); //draw right end rectangle

        //draw grey boxes
        setBackgroundColor(Color.parseColor("#808080"));
        int boxWidth = (getWidth() - mSideRectWidth) / 7;

        //draw text views
        for (int i = 0; i < 7; i++) {
            canvas.drawText(Integer.toString(i + 1), (i * boxWidth + 10) + (boxWidth / 2), ((canvas.getHeight() / 2) - ((mTextPaint.descent() + mTextPaint.ascent()) / 2)), mTextPaint);
        }

        //draw black lines
        for (int i = 1; i < 7; i++) {
            canvas.drawLine(mSideRectWidth + boxWidth * i, 0, mSideRectWidth + boxWidth * i, getHeight(), mBlackPaint);
        }

        //draw red windows
        for (int i = 0; i < 4; i++) {
            mWindowPaint.setStyle(Paint.Style.STROKE);//add this
            int left = i * (rectWidth + space);
            int right = left + rectWidth;
            if (i == 1){
                mWindowPaint.setStyle(Paint.Style.FILL); // change to this
            }

            Rect rect = new Rect(left, 0, right, topRectHeight);
            canvas.drawRect(rect, mWindowPaint);
            Rect rect2 = new Rect(left, h - bottomRectHeight, right, h);
            canvas.drawRect(rect2, mWindowPaint);
        }
    }
}

预期结果
enter image description here

当前不受欢迎的结果
enter image description here

activity_main.xml中



    


MainActivity.java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

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