Android显示Unity视图

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_EDITOR
byte[] 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" >

<ImageView
android: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。。。