(2)、andengine之Rectangle与ScreenCapture（矩形与截屏）

如果使用截屏，需要修改andengine源码中的org.andengine.entity.util.ScreenCapture类中的saveCapture方法：

修改后代码：

private static void saveCapture(final Bitmap pBitmap, final String pFilePath) throws FileNotFoundException {
  FileOutputStream out = null;
  try {
   File file = new File(pFilePath);
   if (!file.getParentFile().exists())
   {
      if(!file.getParentFile().mkdirs()){ //创建文件
                 throw new FileNotFoundException("create dir fail.");
              }
   }
   out = new FileOutputStream(pFilePath);
   pBitmap.compress(CompressFormat.PNG, 100, out);
  } catch (final FileNotFoundException e) {
   StreamUtils.flushCloseStream(out);
   Debug.e("Error saving file to: " + pFilePath, e);
   throw e;
  }
 }

然后重新打包，然后加到自己的项目中使用。

 

import org.andengine.engine.camera.Camera;
import org.andengine.engine.options.EngineOptions;
import org.andengine.engine.options.ScreenOrientation;
import org.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;
import org.andengine.entity.Entity;
import org.andengine.entity.primitive.Rectangle;
import org.andengine.entity.scene.IOnSceneTouchListener;
import org.andengine.entity.scene.Scene;
import org.andengine.entity.scene.background.Background;
import org.andengine.entity.util.FPSLogger;
import org.andengine.entity.util.ScreenCapture;
import org.andengine.entity.util.ScreenCapture.IScreenCaptureCallback;
import org.andengine.input.touch.TouchEvent;
import org.andengine.ui.activity.SimpleBaseGameActivity;
import org.andengine.util.FileUtils;
import org.andengine.util.color.Color;

import android.util.DisplayMetrics;
import android.widget.Toast;
/**
 * 创建有颜色的矩形
 */
public class RectangleActivity extends SimpleBaseGameActivity
{
 private static int winWidth = 854;
 private static int winHeight = 480;
 //每个矩形的大小
 private static final int RECTANGLE_WIDTH = 180;
 private static final int RECTANGLE_HEIGHT = 180;
 
 @Override
 public EngineOptions onCreateEngineOptions()
 {
  setScreenDisplay();
  Camera camera = new Camera(0, 0, winWidth, winHeight);
  EngineOptions engineOptions = new EngineOptions(
    true,
    ScreenOrientation.LANDSCAPE_FIXED,
    new RatioResolutionPolicy(winWidth, winHeight),
    camera);
  return engineOptions;
 }

 @Override
 protected void onCreateResources()
 {

 }
 /**
  * 创建场景
  */
 @Override
 protected Scene onCreateScene()
 {
  this.mEngine.registerUpdateHandler(new FPSLogger());
  Scene scene = new Scene();
  scene.setBackground(new Background(Color.BLACK));
  Rectangle rectangle1 = makeColorRectangle(0, 0, RECTANGLE_WIDTH, RECTANGLE_HEIGHT, Color.RED);
  Rectangle rectangle2 = makeColorRectangle(RECTANGLE_WIDTH, 0, RECTANGLE_WIDTH, RECTANGLE_HEIGHT, Color.YELLOW);
  Rectangle rectangle3 = makeColorRectangle(0, RECTANGLE_WIDTH, RECTANGLE_WIDTH, RECTANGLE_HEIGHT, Color.BLUE);
  Rectangle rectangle4 = makeColorRectangle(RECTANGLE_WIDTH, RECTANGLE_HEIGHT, RECTANGLE_WIDTH, RECTANGLE_HEIGHT, Color.WHITE);
  //居中显示
  Entity entity = new Entity((winWidth-2*RECTANGLE_WIDTH)/2, (winHeight-2*RECTANGLE_HEIGHT)/2);
  entity.attachChild(rectangle1);
  entity.attachChild(rectangle2);
  entity.attachChild(rectangle3);
  entity.attachChild(rectangle4);
  scene.attachChild(entity);
  //截屏(该代码要在截图场景的下面)
  final ScreenCapture screenCapture = new ScreenCapture();
  //加入截屏功能
  scene.attachChild(screenCapture);
  //场景触摸事件
  scene.setOnSceneTouchListener(new IOnSceneTouchListener()
  {
   @Override
   public boolean onSceneTouchEvent(Scene pScene, TouchEvent pSceneTouchEvent)
   {
    if (pSceneTouchEvent.isActionDown())
    {
     screenCapture.capture(
       winWidth, winHeight,
       FileUtils.getAbsolutePathOnExternalStorage(RectangleActivity.this,"Screen_" + System.currentTimeMillis() + ".png"),
       new IScreenCaptureCallback()
       {
        /**
         * 截图成功
         */
        @Override
        public void onScreenCaptured(final String pFilePath)
        {
         RectangleActivity.this.runOnUiThread(new Runnable()
         {
          
          @Override
          public void run()
          {
           Toast.makeText(RectangleActivity.this, "截图成功："+pFilePath, 3000).show();
          }
         });

        }
        /**
         * 截图失败
         */
        @Override
        public void onScreenCaptureFailed(final String pFilePath, final Exception pException)
        {
         RectangleActivity.this.runOnUiThread(new Runnable()
         {
          
          @Override
          public void run()
          {
           Toast.makeText(RectangleActivity.this, "截图失败："+pFilePath, 3000).show();
           System.err.println("失败："+pException.getMessage());
          }
         });

        }
       });
    }
    return true;
   }
  });
  return scene;
 }
 /**
  * 创建有颜色的矩形
  * @return
  */
 private Rectangle makeColorRectangle(float pX, float pY, float pWidth, float pHeight,Color pColor)
 {
  Rectangle rectangle = new Rectangle(pX, pY, pWidth, pHeight, getVertexBufferObjectManager());
  rectangle.setColor(pColor);
  return rectangle;
 }
 
 /**
  * 设置屏幕大小
  */
 private void setScreenDisplay()
 {
  DisplayMetrics outMetrics = new DisplayMetrics();
  getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
  winWidth = outMetrics.widthPixels;
  winHeight = outMetrics.heightPixels;
 }
 

}