这篇文章主要为大家详细介绍了Android SurfaceView画板操作，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
本文实例为大家分享了Android SurfaceView画板操作的具体代码，供大家参考，具体内容如下
画板――画路径
package com.example.review.view; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PorterDuff; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; /** * 画板画路径 */ public class HuabanView extends SurfaceView implements SurfaceHolder.Callback { private SurfaceHolder surfaceHolder; private Path path = new Path(); public HuabanView(Context context) { super(context); } public HuabanView(Context context, AttributeSet attrs) { super(context, attrs); surfaceHolder = getHolder(); surfaceHolder.addCallback(this);//获得surfaceview的生命周期 } public HuabanView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } public HuabanView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); } @Override public void surfaceCreated(SurfaceHolder holder) { new HuabanThread().start(); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { } @Override public boolean onTouchEvent(MotionEvent event) { float x = event.getX(); float y = event.getY(); int action = event.getAction(); if (action == MotionEvent.ACTION_DOWN) {//按下 path.moveTo(x, y); } else if (action == MotionEvent.ACTION_MOVE) {//移动 path.lineTo(x, y); } return true; } class HuabanThread extends Thread { @Override public void run() { super.run(); //TODO:画笔 Paint paint = new Paint(); paint.setColor(Color.BLACK); paint.setStrokeWidth(20); paint.setStyle(Paint.Style.STROKE); paint.setAntiAlias(true); //TODO:画布 while (true) { Canvas canvas = surfaceHolder.lockCanvas(); //避免空指针 if (canvas == null){ return; } canvas.drawColor(Color.WHITE, PorterDuff.Mode.CLEAR); canvas.drawColor(Color.WHITE); canvas.drawPath(path,paint); surfaceHolder.unlockCanvasAndPost(canvas); } } } public void close(){ path.reset(); } }画板――画动态直线
package com.example.review.view; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.PorterDuff; import android.util.AttributeSet; import android.view.SurfaceHolder; import android.view.SurfaceView; /** * 画板画路径 * 画动态直线 */ public class LineView extends SurfaceView implements SurfaceHolder.Callback { private SurfaceHolder surfaceHolder; private Path path = new Path(); private int x = 0; public LineView(Context context) { super(context); } public LineView(Context context, AttributeSet attrs) { super(context, attrs); surfaceHolder = getHolder(); surfaceHolder.addCallback(this);//获得surfaceview的生命周期 } public LineView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } public LineView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); } @Override public void surfaceCreated(SurfaceHolder holder) { new HuabanThread().start(); } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { } class HuabanThread extends Thread { @Override public void run() { super.run(); //TODO:画笔 Paint paint = new Paint(); paint.setColor(Color.BLACK); paint.setStrokeWidth(20); paint.setStyle(Paint.Style.STROKE); paint.setAntiAlias(true); //TODO:画布 while (true) { Canvas canvas = surfaceHolder.lockCanvas(); //避免空指针 if (canvas == null){ return; } canvas.drawColor(Color.WHITE, PorterDuff.Mode.CLEAR); canvas.drawColor(Color.WHITE); canvas.drawLine(0,100,x++,100,paint); surfaceHolder.unlockCanvasAndPost(canvas); } } } public void close(){ path.reset(); } }基本图形
//圆 canvas.drawOval(50,100,150,200,paint); //半圆 canvas.drawArc(500,500,700,700,20,180,true,paint); //矩形 canvas.drawRect(100,300,250,400,paint); //三角形 canvas.drawLine(100,450,0,600,paint); canvas.drawLine(0,600,400,600,paint); canvas.drawLine(100,450,400,600,paint); //梯形 canvas.drawLine(100,700,200,700,paint); canvas.drawLine(100,700,0,900,paint); canvas.drawLine(0,900,400,900,paint); canvas.drawLine(200,700,400,900,paint); //文字 canvas.drawText("截图",100,1000,paint);以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持html中文网。
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