大佬教程收集整理的这篇文章主要介绍了Android轻松画出触摸轨迹,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
本文实例介绍了Android如何画出触摸轨迹的方法,分享给大家供大家参考,具体内容如下@H_489_1@
package com.android.gameview5; import android.app.Activity; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.os.bundle; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceHolder.CallBACk; import android.view.SurfaceView; import android.view.Window; import android.view.WindowManager; public class SurfaceViewActivity3 extends Activity { public void onCreate(Bundle s){ super.onCreate(s); //全屏显示 requestWindowFeature(Window.FEATURE_NO_titlE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(new MyView(this)); } public class MyView extends SurfaceView implements CallBACk,Runnable{ public static final int TIME_IN_FRAME =50; Paint mPaint = null; Paint mTextPaint = null; SurfaceHolder mSurfaceHolder = null; Boolean mRunning = false; Canvas mCanvas = null; private Path mPath; private float mposx,mposy; public MyView(Context context){ super(context); this.setFocusable(true); this.setFocusableInTouchMode(true); mSurfaceHolder = this.getHolder(); mSurfaceHolder.addCallBACk(this); mCanvas = new Canvas(); mPaint = new Paint(); mPaint.setColor(Color.bLACK); mPaint.setAntiAlias(true); mPaint.setStyle(Paint.Style.stroke); mPaint.setstrokeCap(Paint.Cap.ROUND); mPaint.setstrokeWidth(6); mPath = new Path(); mTextPaint = new Paint(); mTextPaint.setColor(Color.bLACK); mTextPaint.setTextSize(15); } public Boolean onTouchEvent(MotionEvent event){ int action = event.getAction(); float x = event.getX(); float y = event.getY(); switch(action){ case MotionEvent.ACTION_DOWN: mPath.moveTo(x,y); break; case MotionEvent.ACTION_MOVE: mPath.quadTo(mposx,mposy,x,y); break; case MotionEvent.ACTION_UP: //mPath.reset(); break; } //记录当前触摸点得当前得坐标 mposx = x; mposy = y; return true; } private void onDraw(){ mCanvas.drawColor(Color.WHITE); //绘制曲线 mCanvas.drawPath(mPath,mPaint); mCanvas.drawText("当前触笔X:"+mposx,20,mTextPaint); mCanvas.drawText("当前触笔Y:"+mposy,40,mTextPaint); } public void run() { // TODO Auto-generated method stub while(mRunning){ long startTime = System.currentTimeMillis(); synchronized(mSurfaceHolder){ mCanvas = mSurfaceHolder.lockCanvas(); onDraw(); mSurfaceHolder.unlockCanvasAndPost(mCanvas); } long endTime = System.currentTimeMillis(); int diffTime = (int) (endTime - startTimE); while(diffTime<=TIME_IN_FRAME){ diffTime =(int)(System.currentTimeMillis()-startTimE); Thread.yield(); } } } @Override public void surfaceChanged(SurfaceHolder holder,int format,int width,int height) { // TODO Auto-generated method stub } @Override public void surfaceCreated(SurfaceHolder holder) { mRunning = true; new Thread(this).start(); } @Override public void surfaceDestroyed(SurfaceHolder holder) { // TODO Auto-generated method stub mRunning = false; } } } @H_616_15@
以上就是Android轻松画出触摸轨迹的具体方法,希望对大家的学习有所帮助。@H_489_1@
以上是大佬教程为你收集整理的Android轻松画出触摸轨迹全部内容,希望文章能够帮你解决Android轻松画出触摸轨迹所遇到的程序开发问题。
如果觉得大佬教程网站内容还不错,欢迎将大佬教程推荐给程序员好友。
本图文内容来源于网友网络收集整理提供,作为学习参考使用,版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ:384754419,请注明来意。