我正在尝试在Android中制作游戏。我画了一个包含圆圈网格(5 * 6)的棋盘。我正在使用画布,当用户在水平或垂直方向上触摸两个圆圈时,我想绘制线条。每当触摸事件发生时,它应该采用两个圆圈的x,y坐标和它们之间的drawLine()。我试过这个,但我面临两个问题,如下所述。
这是代码。请建议我解决。
package com.example.tap;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.gesture.Gesture;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.Log;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new board(this));
}
public class board extends View
{
Paint pBack = new Paint();
Paint pDot = new Paint();
int xpos=0;
int ypos=0;
int cols = 5;
int rows = 6;
public board(Context context)
{
super(context);
pBack.setARGB(255, 15, 102, 0);
pDot.setARGB(255, 255, 255, 255);
}
@SuppressLint("DrawAllocation")
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
canvas.drawPaint(pBack);
float xStep = canvas.getWidth() / (cols + 1);
float yStep = canvas.getHeight() / (rows + 1);
float curCirclXpos, curCirclYpos, lastCirclXpos = 0, lastCirclYpos =0;
//float vertical=
// boolean onTap(Gesture g, Point p)
// {
//
// }
for (int y = 0; y < rows; y++)
{
for (int x = 0; x < cols; x++)
{
canvas.drawCircle((x + 1) * xStep, (y + 1) * yStep, 20, pDot);
curCirclXpos=x;
curCirclYpos=y;
if (y == 0)
{
//canvas.drawLine((x + 1) * xStep, yStep, (x + 1) * xStep, rows * yStep, pDot);
//canvas.drawLine(xpos, ypos, xpos, yStep, pDot);
canvas.drawLine(curCirclXpos, curCirclYpos, lastCirclXpos, lastCirclYpos, pDot);
}
}
//canvas.drawLine(xStep, (y + 1) * yStep, cols * xStep, (y + 1) * yStep, pDot);
}
}
public boolean onTouchEvent(MotionEvent e)
{
xpos=(int) e.getX();
ypos=(int) e.getY();
switch (e.getAction())
{
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_MOVE:
//Log.d("Umar",String.valueOf(xpos));
//Log.d("Farooq",String.valueOf(ypos));
break;
}
return false;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}