android多点触摸驱动的测试

package com.android; import android.app.Activity; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; //import android.graphics.RectF; import android.os.Bundle; //import android.util.DisplayMetrics; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.Window; import android.view.WindowManager; public class MultiTouch extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); //设置成全屏 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(new MyView(this)); } public class MyView extends SurfaceView implements SurfaceHolder.Callback,android.view.View.OnKeyListener,android.view.View.OnTouchListener, android.view.View.OnClickListener,android.view.View.OnLongClickListener { private static final int MAX_TOUCHPOINTS = 10; private Paint textPaint = new Paint(); private Paint touchPaints[] = new Paint[MAX_TOUCHPOINTS]; private int colors[] = new int[MAX_TOUCHPOINTS]; private int width,height; private float scale = 1.0f; SurfaceHolder holder; public MyView(Context context) { super(context); SurfaceHolder holder = getHolder(); holder.addCallback(this); setFocusable(true); setFocusableInTouchMode(true); //setOnClickListener(mClickListener); //setOnLongClickListener(mOnLongClickListener); init(); } private void init() { // 初始化10个不同颜色的画笔 textPaint.setColor(Color.WHITE); textPaint.setAlpha(0x40); colors[0] = Color.BLUE; colors[1] = Color.RED; colors[2] = Color.GREEN; colors[3] = Color.YELLOW; colors[4] = Color.CYAN; colors[5] = Color.MAGENTA; colors[6] = Color.DKGRAY; colors[7] = Color.WHITE; colors[8] = Color.LTGRAY; colors[9] = Color.GRAY; for (int i = 0; i < MAX_TOUCHPOINTS; i++) { touchPaints[i] = new Paint(); touchPaints[i].setColor(colors[i]); } } @Override public boolean onTouchEvent(MotionEvent event) { int pointerCount = event.getPointerCount(); if (pointerCount > MAX_TOUCHPOINTS) { pointerCount = MAX_TOUCHPOINTS; } Canvas c = getHolder().lockCanvas(); if (c != null) { c.drawColor(Color.BLACK); if (event.getAction() == MotionEvent.ACTION_UP) { //changebackcolor(pointerCount); } else if(event.getAction() == MotionEvent.ACTION_DOWN) { //changebackcolor(event.getPointerCount()); for (int i = 0; i < pointerCount; i++) { // 获取一个触点的坐标，然后开始绘制 int id = event.getPointerId(i); ; int x = (int) event.getX(i); int y = (int) event.getY(i); drawCrosshairsAndText(x, y, touchPaints[id], i, c); } int textY = (int) ((15 + 20 * 0) * scale); c.drawText("触摸点数目" + "=" + pointerCount, width - 100 * scale, textY, textPaint); for (int i = 0; i < pointerCount; i++) { int id = event.getPointerId(i); int x = (int) event.getX(i); int y = (int) event.getY(i); drawCircle(x, y, touchPaints[id], c); } } else{ //changebackcolor(pointerCount); for (int i = 0; i < pointerCount; i++) { int id = event.getPointerId(i); ; int x = (int) event.getX(i); int y = (int) event.getY(i); drawCrosshairsAndText(x, y, touchPaints[id], i, c); } int textY = (int) ((15 + 20 * 0) * scale); c.drawText("触摸点数目" + "=" + pointerCount, width - 100 * scale, textY, textPaint); for (int i = 0; i < pointerCount; i++) { int id = event.getPointerId(i); int x = (int) event.getX(i); int y = (int) event.getY(i); drawCircle(x, y, touchPaints[id], c); } } getHolder().unlockCanvasAndPost(c); } return true; } private void drawCrosshairsAndText(int x, int y, Paint paint, int ptr, Canvas c) { c.drawText("x" + ptr + "=" + x, x+10 * scale, y, textPaint); c.drawText("y" + ptr + "=" + y, x+10 * scale, y+12 * scale, textPaint); }