如何使textview像图像使用Canvas？

问题描述

我已经实现了上视图，参考这个ans 5075

I already implemented upper view with reference to this ans 5075

我试过

     public class CanvasView extends View {

   Paint bPaint;
RectF coordbounds;
private Context mContext;

public CanvasView(Context context) {
    super(context);
    this.mContext = context;
}

private void init() {
    bPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    bPaint.setStyle(Paint.Style.FILL_AND_STROKE);
    bPaint.setColor(Color.WHITE);
}

@Override
public void onDraw(android.graphics.Canvas canvas)

{
    super.onDraw(canvas);

    canvas.drawLine(coordbounds.left, coordbounds.centerY(),
            coordbounds.right, coordbounds.centerY(), bPaint);

    Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_approved);

    int rectwidth = bitmap.getWidth();
    int rectheight = bitmap.getHeight();


    //Divide the line into four segments and subtract 2 * half the radii
    float actualspan_image = (coordbounds.right - coordbounds.left) - (2 * rectwidth / 2);

    //Segment the line into 3 parts
    float interlinesegments_bitmap = actualspan_image / (5 - 1);


    int circledia = 20;

    //Divide the line into four segments and subtract 2 * half the      radii
    float actualspan = (coordbounds.right - coordbounds.left) - (2 * circledia / 2);
    //Segment the line into 3 parts
    float interlinesegments = actualspan / (5 - 1);

    for (int i = 0; i < 5; i++) {
        float left = coordbounds.left + (i * interlinesegments_bitmap);
        float top = coordbounds.centerY() - rectheight / 2;
        float right = coordbounds.left + (i * interlinesegments_bitmap) + rectwidth;
        float bottom = coordbounds.centerY() + rectheight / 2;

        if (i == 1) {

            canvas.drawBitmap(bitmap, null, new RectF(left, top, right, bottom), null);

            //canvas.drawLine(left, top, right, bottom, bPaint);

            Paint paint = new Paint();

            paint.setTextSize(20);
            paint.setTextAlign(Paint.Align.CENTER);

            TextView nameTv = new TextView(mContext);

            nameTv.layout(0,0, (int)(coordbounds.left + circledia / 2 +
                          (i * interlinesegments)), (int)  coordbounds.centerY());



            nameTv.setGravity(Gravity.CENTER | Gravity.BOTTOM);
            nameTv.setTextColor(Color.WHITE);
            nameTv.setText("Consultation");

            nameTv.draw(canvas);

        } else {
            canvas.drawCircle(coordbounds.left + circledia / 2 +
                            (i * interlinesegments),
                    coordbounds.centerY(), 10, bPaint);


        }


    }
}

推荐答案

要在onDraw中执行以下操作：

To place the text do as follows in onDraw:

float midline_segment = (5-1)/2 * interlinesegments + rectwidth/2;
canvas.drawText("Order transmitted XYZ",
coordbounds.left +  midline_segment,
coordbounds.centerY()+40,tPaint);

确保在Paint对象中正确设置对齐：

Make sure that you set the alignment correctly in the Paint object:

tPaint.setTextAlign(Paint.Align.CENTER);

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