自定义视图无法正确绘制

时间:2015-05-07 09:35:24

标签: android canvas view path ondraw

我正在制作一款Android游戏,其中有一些带有一些正方形的棋盘(类似于棋盘)。每个正方形都有一些颜色,我制作了一个自定义的View类,我在其中覆盖了onDraw()方法,以便按照我想要的方式绘制正方形。每个正方形由四个三角形组成,如下图所示,其中显示了一个3x3正方形的板: https://dl.dropboxusercontent.com/u/48529299/Impossible%20Puzzle/ic_launcher.png 每个三角形可以是三种颜色中的一种:紫色,粉红色或黄色。 我的onDraw()方法绘制了每个三角形,问题是我有时看到白色或黑色三角形。这应该是不可能的,因为我的自定义View类只能用我前面提到的三种颜色绘制。它有一个名为availableColors的静态数组,我确信它不包含黑色或白色,所以如果发生这种情况是因为我在onDraw()方法上做了一些不好的事情。你能告诉我我做错了什么吗? 这是我的自定义View子类:

package bembibre.impossiblepuzzle.ui;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Path.FillType;
import android.graphics.drawable.Drawable;
import android.view.View;
import bembibre.impossiblepuzzle.R;
import bembibre.impossiblepuzzle.logic.models.Square;

public class ImpossiblePuzzleView extends View {
    private Paint paint = new Paint();
    private Path path = new Path();
    private static int[] availableColors;
    private Square square;

    public ImpossiblePuzzleView(Context context) {
        super(context);
        this.setWillNotDraw(false);
        if (ImpossiblePuzzleView.availableColors == null) {
            ImpossiblePuzzleView.availableColors = context.getResources().getIntArray(R.array.available_colors);
        }
        this.paint.setFlags(Paint.ANTI_ALIAS_FLAG);
        this.paint.setStyle(Paint.Style.FILL);
        this.path.setFillType(FillType.WINDING);
    }

    /**
     * Devuelve un color en formato #RRGGBB de entre los colores que están
     * disponibles en el juego para pintar los cuadrados del tablero.
     * 
     * @param index un número entero mayor que 0.
     * 
     * @return un color en formato #RRGGBB.
     */
    public int getColor(int index) {
        int result;

        index--;
        if ((index > 0) && (index < ImpossiblePuzzleView.availableColors.length)) {
            result = ImpossiblePuzzleView.availableColors[index];
        } else {
            result = ImpossiblePuzzleView.availableColors[0];
        }

        return result;
    }

    @SuppressLint("NewApi") @SuppressWarnings("deprecation")
    @Override
    public void onDraw(Canvas canvas) {
        if (this.square != null) {
            switch(this.square.getType()) {
            case NORMAL:
                int full = this.getMeasuredWidth();
                int half = full / 2;
                int[] status = this.square.getStatus();

                this.path.reset();
                this.paint.setColor(this.getColor(status[0]));
                this.path.moveTo(half, half);
                this.path.lineTo(0, 0);
                this.path.lineTo(0, full);
                this.path.lineTo(half, half);
                this.path.close();
                canvas.drawPath(this.path, this.paint);

                this.path.reset();
                this.paint.setColor(this.getColor(status[1]));
                this.path.moveTo(half, half);
                this.path.lineTo(0, 0);
                this.path.lineTo(full, 0);
                this.path.lineTo(half, half);
                this.path.close();
                canvas.drawPath(this.path, this.paint);

                this.path.reset();
                this.paint.setColor(this.getColor(status[2]));
                this.path.moveTo(half, half);
                this.path.lineTo(full, 0);
                this.path.lineTo(full, full);
                this.path.lineTo(half, half);
                this.path.close();
                canvas.drawPath(this.path, this.paint);

                this.path.reset();
                this.paint.setColor(this.getColor(status[3]));
                this.path.moveTo(half, half);
                this.path.lineTo(full, full);
                this.path.lineTo(0, full);
                this.path.lineTo(half, half);
                this.path.close();
                canvas.drawPath(this.path, this.paint);
                break;

            case UNTOUCHABLE:
            default:
                Drawable background;
                if (android.os.Build.VERSION.SDK_INT < 22) {
                    background = this.getContext().getResources().getDrawable(R.drawable.untouchable);
                } else {
                    background = this.getContext().getResources().getDrawable(R.drawable.untouchable, null);
                }
                if (android.os.Build.VERSION.SDK_INT < 16) {
                    this.setBackgroundDrawable(background);
                } else {
                    this.setBackground(background);
                }

                break;
            }
        }
    }

    /**
     * Indica a esta vista cuál es el cuadrado que tiene que mostrar, es decir,
     * qué es lo que tiene que pintar.
     * 
     * @param square objeto que indica a esta vista cómo se tiene que pintar.
     */
    public void setSquare(Square square) {
        this.square = square;
    }
}

0 个答案:

没有答案