Android Wearは通知にActivityを出せる！！！

AndroidManifest.xml

        <activity
            android:name=".SampleActivity"
            android:exported="true"
            android:allowEmbedded="true"
            android:label="@string/app_name"
            android:taskAffinity="" />

MainActivity.java

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_wear_explain);

        Intent displayIntent = new Intent(this, SampleActivity.class);
        displayIntent.putExtra("title",
                "sample");
        PendingIntent displayPendingIntent = PendingIntent.getActivity(this,
                0, displayIntent, 0);
        Notification notif = buildBasicNotification(this)
                .extend(new Notification.WearableExtender().setCustomSizePreset(Notification.WearableExtender.SIZE_LARGE)
                        .setDisplayIntent(displayPendingIntent))
                .build();
        NotificationManagerCompat.from(this).notify(0, notif);

    }

    private static Notification.Builder buildBasicNotification(Context context) {
        return new Notification.Builder(context)
                .setContentTitle("titleです")
                .setContentText("textです")
                        // Set a content intent to return to this sample
                .setContentIntent(PendingIntent.getActivity(context, 0,
                        new Intent(context, MainActivity.class), 0))
                .setSmallIcon(R.drawable.ic_launcher);
    }