不多說直接看程式。。改了一天終於改出來了。

（1）MyActivity   裡的程式碼

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;


public class MyActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //隱去標題欄
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        //隱去狀態列
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(new MySurfaceView(this));
    }
}

（2）MySurfaceView裡的程式碼

（邏輯有點亂 慢慢看  改動太多 自己都醉了）

import android.content.Context;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.drawable.BitmapDrawable;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

import static android.graphics.Color.TRANSPARENT;


public class MySurfaceView extends SurfaceView implements SurfaceHolder.Callback {
    private SurfaceHolder sfh;
    private Paint paint;
    private  int  textX=400,textY=400;



    private  int count = 0;

    private MyTime myThread;

    public MySurfaceView(Context context){
        super(context);
        sfh=this.getHolder();//例項SurfaceHolder
        sfh.addCallback(this);//為SurfaceHolder新增狀態監聽
        myThread = new MyTime(sfh);

    }




    public void surfaceCreated(SurfaceHolder holder){

        myThread.isRun = true;
        myThread.start();
         myDraw();
    }

    public  void surfaceChanged(SurfaceHolder holder,int fornat,int width,int height){

    }

    public void  surfaceDestroyed(SurfaceHolder holder){
        myThread.isRun = false;
    }
    public void  myDraw(){

        paint=new Paint();//例項一個畫筆

        Canvas canvas =sfh.lockCanvas();
        Bitmap  bitmap=((BitmapDrawable)getResources().getDrawable(R.drawable.bar)).getBitmap();
        canvas.drawColor(TRANSPARENT, PorterDuff.Mode.CLEAR);
        canvas. drawBitmap(bitmap, textX, textY,paint);

        paint.setColor(Color.GREEN);
        paint.setTextSize(30);
        canvas.drawText("這是第" + (count) + "秒", 100, 310,  paint);
        sfh.unlockCanvasAndPost(canvas);
    }


    public  boolean onTouchEvent(MotionEvent event){
        int x=(int)event.getX();
        int y=(int)event.getY();
        if(event.getAction()==MotionEvent.ACTION_DOWN){
            textX=x-75;
            textY=y-120;

        } else  if(event.getAction()==MotionEvent.ACTION_MOVE){
            textX=x-75;
            textY=y-120;

        }else  if(event.getAction()==MotionEvent.ACTION_UP){
            textX=x-75;
            textY=y-120;

        }
        myDraw();
        return  true;
    }


    class MyTime extends Thread
    {
        private SurfaceHolder holder;
        public boolean isRun ;
        public  MyTime(SurfaceHolder holder)
        {
            this.holder =holder;
            isRun = true;
        }
        @Override
        public void run() {
           // int count = 0;
            while (isRun) {
                Canvas c = null;
                try {
                        count++;
                        Thread.sleep(1000);//睡眠時間為1秒
                       myDraw();
                } catch (Exception e) {
                    // TODO: handle exception
                    e.printStackTrace();
                }

            }
        }
    }
    }