我应该如何重复使用AnymoteClient服务，以便在启动新活动时不必与google tv重新配对？

Question

我正在使用GoogleTV和Android平板电脑进行一些调查。我已经设法制作一个Android应用程序，可以从主Activity发送控制消息到谷歌电视，我想要做的是从主Activity启动一个新活动，并继续使用AnymoteClientService服务与新活动。在我的主要活动中，我获得了一个anymoteSender句柄，用于将KeyEvent消息发送到google tv，如何将其传输到新活动（SlidepuzzleActivity）？我可以再次实例化，但这意味着必须再次完成整个配对过程。

从下面的代码中我会看到我的SlidepuzzleActivity类中有一个anymoteSender，这会引发错误，但说明我需要重用该变量的位置。

代码： MainActivity.java：

package uk.co.myapp.gtvremote;
//imports removed for paste

public class MainActivity extends Activity implements ClientListener{

    private AnymoteSender anymoteSender;
    private TextView statusText;
    protected AnymoteClientService mAnymoteClientService;
    private static String statusPrefix = "Status: ";
    private Context mContext;
    private ProgressBar progressBar;

    private Handler handler;
    private TouchHandler touchPadHandler;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        progressBar = (ProgressBar) findViewById(R.id.a_progressbar);
        progressBar.setVisibility(View.VISIBLE);

        mContext = this;



        ImageButton upArrowButton = (ImageButton) findViewById(R.id.upArrow);
        ImageButton leftArrowButton = (ImageButton) findViewById(R.id.leftArrow);
        ImageButton centreButton = (ImageButton) findViewById(R.id.centreButton);
        ImageButton rightArrowButton = (ImageButton) findViewById(R.id.rightArrow);
        ImageButton downArrowButton = (ImageButton) findViewById(R.id.downArrow);
        ImageButton backButton = (ImageButton) findViewById(R.id.backButton);
        ImageButton homeButton = (ImageButton) findViewById(R.id.homeButton);
        Button testButton = (Button) findViewById(R.id.testButton);

        upArrowButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                sendKeyEvent(KeyEvent.KEYCODE_DPAD_UP);
            }
        });

        leftArrowButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                sendKeyEvent(KeyEvent.KEYCODE_DPAD_LEFT);
            }
        });

        centreButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                sendKeyEvent(KeyEvent.KEYCODE_DPAD_CENTER);
            }
        });

        rightArrowButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                sendKeyEvent(KeyEvent.KEYCODE_DPAD_RIGHT);
            }
        });

        downArrowButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                sendKeyEvent(KeyEvent.KEYCODE_DPAD_DOWN);
            }
        });

        backButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                sendKeyEvent(KeyEvent.KEYCODE_BACK);

            }
        });

        homeButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                sendKeyEvent(KeyEvent.KEYCODE_HOME);

            }
        });

        testButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent myIntent = new Intent(MainActivity.this, SlidepuzzleActivity.class);
                MainActivity.this.startActivity(myIntent);
            }
        });

        handler = new Handler();

        // Bind to the AnymoteClientService
        Intent intent = new Intent(mContext, AnymoteClientService.class);
        bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
        statusText = (TextView) findViewById(R.id.statusText);


    }

    /** Defines callbacks for service binding, passed to bindService() */
    private ServiceConnection mConnection = new ServiceConnection() {
        /*
         * ServiceConnection listener methods.
         */
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {

            mAnymoteClientService = ((AnymoteClientService.AnymoteClientServiceBinder) service)
                    .getService();
            mAnymoteClientService.attachClientListener(MainActivity.this);
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            mAnymoteClientService.detachClientListener(MainActivity.this);
            mAnymoteClientService = null;   
        }

    };

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onConnected(AnymoteSender anymoteSender) {
        if (anymoteSender != null) {
            // Send events to Google TV using anymoteSender.
            // save handle to the anymoteSender instance.
            this.anymoteSender = anymoteSender;
            attachTouchListnertoTouchPad();

        } else {
            statusText.setText(statusPrefix + "Connection attempt failed, cant find send handler");
            //attempt to connect again?
            //attemptToConnect();
        }

        // Hide the progressBar once connection to Google TV is established. Make the text display appropriately
        handler.post(new Runnable() {
            public void run() {
                progressBar.setVisibility(View.INVISIBLE);
                statusText.setText(statusPrefix + "Connected to GoogleTV");

            }
        });
    }

    @Override
    public void onDisconnected() {
        // show message to tell the user about disconnection.
        statusText.setText(statusPrefix + "Disconnected");
        // Try to connect again if needed. This may be need to be done via button
        attemptToConnect();
        this.anymoteSender = null;

    }

    @Override
    public void onConnectionError() {
        // show message to tell the user about disconnection.
        statusText.setText(statusPrefix + "Connection error encountered");
        // Try to connect again if needed.
        attemptToConnect();
        this.anymoteSender = null;

    }

    @Override
    protected void onDestroy() {
        if (mAnymoteClientService != null) {
            mAnymoteClientService.detachClientListener(this);
        }
        unbindService(mConnection);
        super.onDestroy();
    }

    private void attachTouchListnertoTouchPad()
    {
        // Attach touch handler to the touchpad view
        touchPadHandler = new TouchHandler(
                findViewById(R.id.touchPad), Mode.POINTER_MULTITOUCH, anymoteSender);
    }

    public void attemptToConnect()
    {
        //stub to invoke connection attempt
    }

    private void sendKeyEvent(final int keyEvent) {
        // create new Thread to avoid network operations on UI Thread
        if (anymoteSender == null) {
            Toast.makeText(MainActivity.this, "Waiting for connection",
                    Toast.LENGTH_LONG).show();
            return;
        }
        anymoteSender.sendKeyPress(keyEvent);
    }
}

SlidepuzzleActivity.java：

package uk.co.myapp.gtvremote;
//imports removed for paste

public class SlidepuzzleActivity extends Activity implements ClientListener{

    private AnymoteClientService mAnymoteClientService;
    private Context mContext;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.slidepuzzle);
        mContext = this;
        ImageButton piece1x1 = (ImageButton) findViewById(R.id.piece1x1);
        ImageButton piece1x2 = (ImageButton) findViewById(R.id.piece1x2);
        ImageButton piece1x3 = (ImageButton) findViewById(R.id.piece1x3);
        ImageButton piece2x1 = (ImageButton) findViewById(R.id.piece2x1);
        ImageButton piece2x2 = (ImageButton) findViewById(R.id.piece2x2);
        ImageButton piece2x3 = (ImageButton) findViewById(R.id.piece2x3);
        ImageButton piece3x1 = (ImageButton) findViewById(R.id.piece3x1);
        ImageButton piece3x2 = (ImageButton) findViewById(R.id.piece3x2);
        ImageButton piece3x3 = (ImageButton) findViewById(R.id.piece3x3);

        Intent intent = new Intent(mContext, AnymoteClientService.class);
        bindService(intent, mConnection, Context.BIND_AUTO_CREATE);

        piece1x1.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {


            }
        });
    }

    private ServiceConnection mConnection = new ServiceConnection() {


        /*
         * ServiceConnection listener methods.
         */
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {

            mAnymoteClientService = ((AnymoteClientService.AnymoteClientServiceBinder) service)
                    .getService();
            mAnymoteClientService.attachClientListener(SlidepuzzleActivity.this);
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            mAnymoteClientService.detachClientListener(SlidepuzzleActivity.this);
            mAnymoteClientService = null;   
        }

    };

    private void sendKeyEvent(final int keyEvent) {
        // create new Thread to avoid network operations on UI Thread
        if (anymoteSender == null) {
            Toast.makeText(SlidepuzzleActivity.this, "Waiting for connection",
                    Toast.LENGTH_LONG).show();
            return;
        }
        anymoteSender.sendKeyPress(keyEvent);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.slidepuzzle, menu);
        return true;
    }

    @Override
    public void onConnected(AnymoteSender anymoteSender) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onDisconnected() {
        // TODO Auto-generated method stub

    }

    @Override
    public void onConnectionError() {
        // TODO Auto-generated method stub

    }

    @Override
    protected void onDestroy() {
        if (mAnymoteClientService != null) {
            mAnymoteClientService.detachClientListener(this);
        }
        unbindService(mConnection);
        super.onDestroy();
    }


}

Answer 1

刚刚发布了AnymoteLibrary的更新。

在MainActivity中，为AnymoteClientService调用bindService（）（已经）和startService（）。调用startService（）的原因是保持服务及其anymoteSender实例，以便同一个应用程序中的其他Activity可以使用它。

在第二个Activity中，实现ClientListener（如果要获取onDisconnected（）回调）并绑定到服务和attachClientListener（）。要获取AnymoteSender实例，请调用AnymoteClientService.getAnymoteSender（）。请注意，如果与Google TV的连接丢失，它可以返回null。

当使用AnymoteSender完成所有活动时，请记得为AnymoteClientService调用stopService（）。