Android显示Unity视图

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第一次写blog，呵呵，有点激动，主要是方便自己以后复习，写的不好请见谅。。。

这次遇到的问题纠结我好久，关键是对Android不熟悉，下面我来说一下我的问题：

用Unity制作Android上的悬浮窗口，窗口背景透明，用Unity4.2很简单，只要把摄像机的Clear Flags属性设置成Solid Color，然后BackGround属性的RGBA均设置为零，

然后再在Android里设置一下背景透明就可以了。

Android的设置：

private LinearLayout view;private GLSurfaceView mUnityView;public FloatWindowSmallView(Context context) {super(context);mContext = context;windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);LayoutInflater.from(context).inflate(R.layout.float_window_small, this);view = (LinearLayout) findViewById(R.id.small_window_layout);viewWidth = view.getLayoutParams().width;viewHeight = view.getLayoutParams().height;LayoutParams lp = new LayoutParams (LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);

//主要是这里mUnityView = new GLSurfaceView(Common.application);        mUnityView.setEGLContextClientVersion(2);        mUnityView.setZOrderOnTop(true);        mUnityView.setZOrderMediaOverlay(true);        mUnityView.setEGLConfigChooser(8, 8, 8, 8, 16, 0);        mUnityView.setRenderer(Common.mUnityPlayer);        mUnityView.getHolder().setFormat(PixelFormat.TRANSLUCENT);view.addView(mUnityView,0,lp);Common.mUnityPlayer.requestFocus();Common.mUnityPlayer.resume();//TextView percentView = (TextView) findViewById(R.id.percent);//percentView.setText(MyWindowManager.getUsedPercentValue(context));mLongPressRunnable = new Runnable() {                          @Override              public void run() {                               //performLongClick();              openBigWindow();            }          };         }

但是Unity4.6这样设置就不行，背景是一片黑色：

所以换了个思路，将Unity视图输出成一个纹理，见纹理编译成bity[]传给Android，Android再解析成Imageview显示出来。

1、将摄像机视图输出成纹理：新建一个Render Texture ，将其拖给摄像机的Target Texture

2、将Render Texture 转换成byte[]

 this.jc = new AndroidJavaClass("com.gesture.util.ToUnity");

放在Update每桢更新

#if UNITY_ANDROID && !UNITY_EDITORbyte[] bts = UnityView();this.jc.CallStatic("picture", bts);#endif

public byte[] UnityView(){Texture2D myTexture2D = new Texture2D(pic.width,pic.height);RenderTexture.active = pic;myTexture2D.ReadPixels(new Rect(0, 0, pic.width, pic.height), 0, 0);myTexture2D.Apply();RenderTexture.active = null;byte[] bytes = myTexture2D.EncodeToPNG();Destroy (myTexture2D);return bytes;}

3、Android的设置

XML配置文档：

<?xml version="1.0" encoding="UTF-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/small_window_layout"android:layout_width="120dp"android:layout_height="120dp" >      <ImageViewandroid:id="@+id/image_view"android:layout_width="119dp"android:layout_height="119dp"/>        </LinearLayout>

<pre name="code" class="java">private LinearLayout view;private static ImageView image;

public FloatWindowSmallView(Context context) {super(context);windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);LayoutInflater.from(context).inflate(R.layout.float_window_small, this);view = (LinearLayout) findViewById(R.id.small_window_layout);viewWidth = view.getLayoutParams().width;viewHeight = view.getLayoutParams().height;image = (ImageView) findViewById(R.id.image_view);view.addView(Common.mUnityPlayer.getView());Common.mUnityPlayer.requestFocus();Common.mUnityPlayer.resume();}

//把传输过来的字节流转换成Bitmappublic static Bitmap getBitmaoByStream(byte[] imageByte){if (imageByte != null){ByteArrayInputStream byteImage = new ByteArrayInputStream (imageByte);return BitmapFactory.decodeStream(byteImage);}else{return null;}}//更新Imageviewpublic static void ShowTexture(byte[] b){     Bitmap bitmap = getBitmaoByStream(b);     image.setImageBitmap(bitmap);}

4、Unity端调用Android端方法

  //显示unity中Render Texture的内容， 供unity调用    public static void picture(final byte[] b){    new Handler(Looper.getMainLooper()).post(new Runnable(){@Overridepublic void run(){FloatWindowSmallView.ShowTexture(b);}});}

Unity端每桢调用此方法，来刷新ImageView来显示Unity视图，达成效果！！！

但是目前还有一点小问题待解决，就是ImageView不能完全覆盖LinearLayout，否则Unity不运行，还有就是运行效率问题待提高，目前就这样，后续再更新。。。

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