Android SurfaceView 예제

package com.example.surfaceviewsample;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.Menu;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;

public class MainActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  // 이걸 써주면 타이틀바가 잠시 나왔다가 사라진다.
  requestWindowFeature(Window.FEATURE_NO_TITLE);

  CustomView view = new CustomView(this);
  view.getHolder().setFormat(PixelFormat.TRANSLUCENT);     //서피스뷰 투명 배경
  setContentView(view);

  //setContentView(R.layout.activity_main);
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }

 class CustomView extends SurfaceView implements SurfaceHolder.Callback {
  private CustomViewThread cvt;
  Bitmap bm;

  public CustomView(Context context) {
   super(context);
   getHolder().addCallback(this);
   cvt = new CustomViewThread(getHolder(), this);
   bm = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
  }

  @Override
  public void onDraw(Canvas canvas) {
   //canvas.drawBitmap(bm, 64, 64, null);
   // 여기서는 안그려짐.
//   Paint paint = new Paint();
//   paint.setColor(Color.WHITE);
//   canvas.drawCircle(100, 100, 50, paint);

  }

  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
   // TODO Auto-generated method stub

  }

  @Override
  public void surfaceCreated(SurfaceHolder holder) {
   cvt.setRunning(true);
   cvt.start();
  }

  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {

   boolean retry = true;
   cvt.setRunning(false);
   while (retry) {
    try {
     cvt.join();
     retry = false;
    } catch (InterruptedException e) {

    }
   }
  }
 }

 class CustomViewThread extends Thread {
  private SurfaceHolder surfaceholder;
  private CustomView customview;
  private boolean running = false;

  public CustomViewThread(SurfaceHolder surfaceHolder, CustomView CustomView) {
   surfaceholder = surfaceHolder;
   customview = CustomView;
  }

  public void setRunning(boolean run) {
   running = run;
  }

  @Override
  public void run() {
   Canvas c;
   while (running) {
    c = null;
    try {

     c = surfaceholder.lockCanvas(null);
     synchronized (surfaceholder) {
      // onDraw는 android-18에서는 호출이 안되게 막혀있다.
//      customview.onDraw(c);
      // draw는 call해서 onDraw가 불리게 할수는 있지만 onDraw에서 그리면 안그려진다.
//      customview.draw(c);
   
      // 여기서 직접 그려야 한다.
      Paint paint = new Paint();
      paint.setColor(Color.WHITE);
      c.drawCircle(100, 100, 50, paint);
   
      // 아이콘 그리기.
      c.drawBitmap(customview.bm, 64, 64, null);

     }
    } finally {

     if (c != null) {
      surfaceholder.unlockCanvasAndPost(c);
     }
    }
   }
  }
 }

}