无法在Android Tv webview应用程序(HTML+Javascript)上捕获密钥

我正试图为我的网站开发一个安卓电视应用程序。在做了研究之后，我开始使用web-view来加载我的web应用程序，其中包含html-5和JavaScript。

应用程序在web视图上加载良好，我甚至可以在电视模拟器上正确导航，但一旦我在Nexus播放器上部署应用程序，应用程序就不会采取进入事件。当我点击游戏控制器上的按钮A时，它会在点击Nexus播放器上的游戏控制器上的A按钮时出现错误 ------"您没有可以执行此操作的应用程序"

之后，我创建了一个虚拟应用程序，用于在屏幕上显示键以进行调试，并且在所有键事件都被捕获的情况下工作得很好。

我已经弄清楚，因为它是一个html5和基于javascript的应用程序的NP是不兼容的。我对此做了很多研究，但没有找到任何坚实的证据，因为一切都很明显。真的需要一个指针来让它工作。

public class ExampleActivity extends Activity implements DialogInterface.OnKeyListener
{
    webView = (VideoEnabledWebView)findViewById(R.id.webView);
            mButton1=(Button)findViewById(R.id.btn);
            webView.addJavascriptInterface(new MyJavaScriptInterface(this),"AndroidFunction");
            // Initialize the VideoEnabledWebChromeClient and set event handlers
            View nonVideoLayout = findViewById(R.id.nonVideoLayout); // Your own view, read class comments
            ViewGroup videoLayout = (ViewGroup)findViewById(R.id.videoLayout); // Your own view, read class comments
            //noinspection all
            View loadingView = getLayoutInflater().inflate(R.layout.view_loading_video, null); // Your own view, read class comments
            webChromeClient = new VideoEnabledWebChromeClient(nonVideoLayout, videoLayout, loadingView, webView) // See all available constructors...
            {
                // Subscribe to standard events, such as onProgressChanged()...
                @Override
                public void onProgressChanged(WebView view, int progress) {
                    // Your code...
                }
            };
            webChromeClient.setOnToggledFullscreen(new VideoEnabledWebChromeClient.ToggledFullscreenCallback() {
                @Override
                public void toggledFullscreen(boolean fullscreen) {
                    // Your code to handle the full-screen change, for example showing and hiding the title bar. Example:
                    if (fullscreen) {
                        WindowManager.LayoutParams attrs = getWindow().getAttributes();
                        attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
                        attrs.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
                        getWindow().setAttributes(attrs);
                        if (android.os.Build.VERSION.SDK_INT >= 14) {
                            //noinspection all
                            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE);
                        }
                    } else {
                        WindowManager.LayoutParams attrs = getWindow().getAttributes();
                        attrs.flags &= ~WindowManager.LayoutParams.FLAG_FULLSCREEN;
                        attrs.flags &= ~WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
                        getWindow().setAttributes(attrs);
                        if (android.os.Build.VERSION.SDK_INT >= 14) {
                            //noinspection all
                            getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
                        }
                    }
                }
            });
            webView.setWebChromeClient(webChromeClient);
            // Navigate anywhere you want, but consider that this classes have only been tested on YouTube's mobile site
            webView.loadUrl("http://html5dev.anorakstech.com/iads/");
            mButton1.setOnClickListener(new Button.OnClickListener() {
                public void onClick(View v) {
                    webView.loadUrl("javascript:fillContent()");
                }
            });
}

这是我用于从nexus播放器附带的真实控制器获取关键事件的代码

@Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        super.onKeyDown(keyCode, event);
        Toast.makeText(ExampleActivity.this, "Key Pressed:"+keyCode, Toast.LENGTH_LONG).show();
        webView.loadUrl("javascript:fillContent()");
        switch(keyCode)
        {
            case KeyEvent.ACTION_DOWN:
                Toast.makeText(ExampleActivity.this, "Key Down"+keyCode, Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.ACTION_UP:
            Log.v("EA", "Keycode" + event.getKeyCode());
            Toast.makeText(ExampleActivity.this, "Key Released"+event.getKeyCode(), Toast.LENGTH_LONG).show();
            return true;
            case KeyEvent.KEYCODE_ENTER:
                Log.v("EA","Keycode"+event.getKeyCode());
                Toast.makeText(ExampleActivity.this, "Pressed Enter"+event.getKeyCode(), Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_DPAD_UP:
                Log.v("EA","Keycode"+event.getKeyCode());
                Toast.makeText(ExampleActivity.this, "Pressed 19", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_DPAD_DOWN:
                Toast.makeText(ExampleActivity.this, "Pressed 20", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_DPAD_LEFT:
                Log.v("EA","Pressed 21");
                Toast.makeText(ExampleActivity.this, "Pressed 21", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_DPAD_RIGHT:
                Toast.makeText(ExampleActivity.this, "Pressed 22", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_CAMERA:
                Toast.makeText(ExampleActivity.this, "Pressed Camera Button", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_1:
                Toast.makeText(ExampleActivity.this, "Pressed 1", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_HOME:
                Toast.makeText(ExampleActivity.this, "Pressed Home Button", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_BACK:
                Toast.makeText(ExampleActivity.this, "Pressed Back Button"+event.getKeyCode(), Toast.LENGTH_LONG).show();
                Intent result = new Intent("Complete");
                setResult(Activity.RESULT_OK, result);
                finish();
                return true;
            case KeyEvent.KEYCODE_BUTTON_A:
                Toast.makeText(ExampleActivity.this, "Pressed 96", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_BUTTON_B:
                Toast.makeText(ExampleActivity.this, "Pressed 97", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_BUTTON_X:
                Toast.makeText(ExampleActivity.this, "Pressed 99", Toast.LENGTH_LONG).show();
                return true;
            case KeyEvent.KEYCODE_BUTTON_Y:
                Toast.makeText(ExampleActivity.this, "Pressed 100", Toast.LENGTH_LONG).show();
                return true;
        }
        return false;
    }

我在这里无法理解的是，它不显示任何toast从keydown方法，但它确实显示toast当我退出应用程序的Keycode_Back事件是4和任何其他keyevent除了BACK事件它不捕获它或显示任何toast按照上面的代码无论是在nexus播放器或模拟器——真的让我疯了。

任何能给我指出正确方向的建议，我都将非常感激。

编辑1:我现在可以在logcat中获得键值但它仍然不显示Toasts我仍然不断得到"你没有一个应用程序可以在按钮A上做这个点击"