Example usage for android.graphics Canvas drawLines

Introduction

In this page you can find the example usage for android.graphics Canvas drawLines.

Prototype

public void drawLines(@Size(multiple = 4) @NonNull float[] pts, @NonNull Paint paint) 

Source Link

Usage

From source file:com.dwdesign.tweetings.util.Utils.java

public static Bitmap getColorPreviewBitmap(final Context context, final int color) {
    if (context == null)
        return null;
    final float density = context.getResources().getDisplayMetrics().density;
    final int width = (int) (32 * density), height = (int) (32 * density);

    final Bitmap bm = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    final Canvas canvas = new Canvas(bm);

    final int rectrangle_size = (int) (density * 5);
    final int numRectanglesHorizontal = (int) Math.ceil(width / rectrangle_size);
    final int numRectanglesVertical = (int) Math.ceil(height / rectrangle_size);
    final Rect r = new Rect();
    boolean verticalStartWhite = true;
    for (int i = 0; i <= numRectanglesVertical; i++) {

        boolean isWhite = verticalStartWhite;
        for (int j = 0; j <= numRectanglesHorizontal; j++) {

            r.top = i * rectrangle_size;
            r.left = j * rectrangle_size;
            r.bottom = r.top + rectrangle_size;
            r.right = r.left + rectrangle_size;
            final Paint paint = new Paint();
            paint.setColor(isWhite ? Color.WHITE : Color.GRAY);

            canvas.drawRect(r, paint);/*  w  w w . j  a v a2 s.c o m*/

            isWhite = !isWhite;
        }

        verticalStartWhite = !verticalStartWhite;

    }
    canvas.drawColor(color);
    final Paint paint = new Paint();
    paint.setColor(Color.WHITE);
    paint.setStrokeWidth(2.0f);
    final float[] points = new float[] { 0, 0, width, 0, 0, 0, 0, height, width, 0, width, height, 0, height,
            width, height };
    canvas.drawLines(points, paint);

    return bm;
}

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