android - 如何从 sony smartwatch 2 更改主机应用程序中的文本？

Question

我正在尝试触发智能 watch 上的按钮点击，然后更改 Android 手机主机应用程序中的文本。我试图向广播接收器发送广播 Intent 并启动一项服务，其中包括一种更改主机应用程序中的文本的方法。但是，changeText() 方法似乎不起作用。我可以启动服务但无法更改文本。请查看我的代码中有什么问题。如果您能给出一个简短示例，说明如何在最佳实践中将广播 Intent 从智能 watch 发送到主机应用程序，那就太好了。

我的控件扩展类

class SampleControlSmartWatch2 extends ControlExtension {
    // Other code

    public void onObjectClick(ControlObjectClickEvent event) { 
        Intent intent = new Intent(SampleExtensionService.INTENT_ACTION_BROADCAST);
        intent.putExtra("Name", "something");
        mContext.sendBroadcast(intent);
    }      
}

我的广播接收器

public class ExtensionReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(final Context context, final Intent intent) {
        intent.setClass(context, HostService.class);
        context.startService(intent);      
    }
}

我的主机应用服务

public class HostService extends Service {
    // Other code

    @Override
    public void onCreate() {
        super.onCreate();
        changeText();        
    }

    public void changeText() {
        LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  
        View layoutHost = inflater.inflate(R.layout.activity_main, null);       
        TextView textView = (TextView) layoutHost.findViewById(R.id.textToBeChanged);
        Log.i(TAG, textView.getText().toString());     // It shows "Original"
        textView.setText("Changed Text");
        Log.i(TAG, textView.getText().toString());     // It shows "Changed Text"
    }
}

我的AndroidManifest.xml

<application
    <!-- Other attribute -->

    <service android:name="com.sony.samplecontrolnotification.SampleExtensionService" />
    <service android:name="com.sony.samplecontrolnotification.HostService" />

    <receiver android:name="com.sony.samplecontrolnotification.ExtensionReceiver" >
        <intent-filter>
            <action android:name="com.sony.samplecontrolnotification.BROADCAST" />      
            <!-- Other action -->                
        </intent-filter>
    </receiver>
</application>

Answer 1

不确定这是否是最好的方法，但这是我解决它的方法:

在我的 Activity 中:

private MyService mService;
final Messenger mMessenger = new Messenger(new IncomingHandler(this));

@Override
protected void onStart() {
    super.onStart();
    Intent intent = new Intent(this, MyService.class);
    bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}

private ServiceConnection mConnection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName className, IBinder service) {
        LocalBinder binder = (LocalBinder) service;
        mService = binder.getService();
        mService.RegisterMessenger(mMessenger);
        mBound = true;
    }

    @Override
    public void onServiceDisconnected(ComponentName arg0) {
        mBound = false;
    }
};

public static class IncomingHandler extends Handler {
    private final WeakReference<MyActivity> activity; 

    IncomingHandler(MyActivity activity) {
        this.activity = new WeakReference<MyActivity>(activity);
    }

    @Override
    public void handleMessage(Message msg) {
        MyActivity dialog = activity.get();
        Bundle data = msg.getData();

        //TODO: update view here
    }
};

在我的服务中:

private ArrayList<Messenger> messengers = new ArrayList<Messenger>();

public class LocalBinder extends Binder {
    public MyService getService() {
        return MyService.this;
    }
}

public void RegisterMessenger(Messenger messenger)
{       
    messengers.add(messenger);
}

public class MyReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        for (Messenger messenger : messengers)
        {           
            Message m = new Message();
            Bundle data = new Bundle();
            //TODO: add data to the message here

            messenger.send(m);
        }
    }
}

缺少一些部分(取消注册信使，取消绑定(bind)服务)但这应该是主要部分。

如果您在注册 BroadcastReceiver 时遇到问题，这篇文章可以提供帮助:https://stackoverflow.com/a/10851904/3047078

也许你甚至可以在没有服务的情况下通过创建一个 BroadcastReceiver 作为你的 Activity 的内部类来做到这一点。