package com.loaderman.customviewdemo;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.view.SurfaceHolder;import android.view.SurfaceView;public class DoubleBufferingTextView extends SurfaceView {    private Paint mPaint;    public DoubleBufferingTextView(Context context) {        super(context);        init();    }    public DoubleBufferingTextView(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    public DoubleBufferingTextView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        init();    }    private void init() {        mPaint = new Paint();        mPaint.setColor(Color.RED);        mPaint.setTextSize(30);        getHolder().addCallback(new SurfaceHolder.Callback() {            @Override            public void surfaceCreated(SurfaceHolder holder) {                drawText(holder);            }            @Override            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {            }            @Override            public void surfaceDestroyed(SurfaceHolder holder) {            }        });    }    private void drawText(final SurfaceHolder holder) {        new Thread(new Runnable() {            @Override            public void run() {                for (int i = 0; i < 10; i++) {                    Canvas canvas = holder.lockCanvas();                    if (canvas != null) {                        canvas.drawText(i + "", i * 30, 50, mPaint);                    }                    holder.unlockCanvasAndPost(canvas);                    try {                        Thread.sleep(800);                    } catch (Exception e) {                        e.printStackTrace();                    }                }            }        }).start();    }}

效果: