android - 磨损 Activity 中的 MessageApi.MessageListener 未触发

Question

所以我在 StackOverflow 上四处寻找，但没有找到答案，所以我想知道是否缺少某些东西。我在我的应用程序的“磨损”部分中有一个 Activity ，其包和应用程序名称与我的移动部分相同，但在发送消息时它没有被触发:

public class MainActivity extends Activity implements MessageApi.MessageListener, GoogleApiClient.ConnectionCallbacks {

private GoogleApiClient mApiClient;
private ArrayAdapter<String> mAdapter;

private ListView mListView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mListView = (ListView) findViewById(R.id.list);

    mAdapter = new ArrayAdapter<String>( this, android.R.layout.simple_list_item_1 );
    mListView.setAdapter( mAdapter );

    initGoogleApiClient();
}

private void initGoogleApiClient() {
    mApiClient = new GoogleApiClient.Builder( this )
            .addApi(Wearable.API)
            .addConnectionCallbacks(this)
            .build();

    if( mApiClient != null && !( mApiClient.isConnected() || mApiClient.isConnecting() ) )
        mApiClient.connect();
}

@Override
protected void onResume() {
    super.onResume();
    if( mApiClient != null && !( mApiClient.isConnected() || mApiClient.isConnecting() ) )
        mApiClient.connect();
}

@Override
public void onMessageReceived(MessageEvent messageEvent) {
    mAdapter.add( new String( messageEvent.getData() ) );
    mAdapter.notifyDataSetChanged();

    Toast.makeText( this, "Wear onMessageReceived", Toast.LENGTH_SHORT ).show();
}

@Override
public void onConnected(Bundle bundle) {
    Toast.makeText( this, "Wear onConnected", Toast.LENGTH_SHORT ).show();
    Wearable.MessageApi.addListener( mApiClient, this );
}

@Override
protected void onStop() {
    super.onStop();
    if( mApiClient != null && mApiClient.isConnected() ) {
        mApiClient.disconnect();
    }
}

@Override
public void onConnectionSuspended(int i) {

}

从我的移动 Activity 中，我发送了一条我希望从 Wear Activity 中获取的消息。如果我使用 Wea​​rListenerService，则 onMessageReceived 会正常触发，但我无法让它在 Activity 中触发。

public class MainActivity extends Activity {

private GoogleApiClient mApiClient;

private ArrayAdapter<String> mAdapter;

private ListView mListView;
private EditText mEditText;
private Button mSendButton;

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

    init();
    initGoogleApiClient();
}

private void initGoogleApiClient() {
    mApiClient = new GoogleApiClient.Builder( this )
            .addApi( Wearable.API )
            .build();

    mApiClient.connect();
}

@Override
protected void onDestroy() {
    super.onDestroy();
    mApiClient.disconnect();
}

private void init() {
    mListView = (ListView) findViewById( R.id.list_view );
    mEditText = (EditText) findViewById( R.id.input );
    mSendButton = (Button) findViewById( R.id.btn_send );

    mAdapter = new ArrayAdapter<String>( this, android.R.layout.simple_list_item_1 );
    mListView.setAdapter( mAdapter );

    mSendButton.setOnClickListener( new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String text = mEditText.getText().toString();
            if( !TextUtils.isEmpty( text ) ) {
                mAdapter.add( text );
                mAdapter.notifyDataSetChanged();

                sendMessage( text );
            }
        }
    });
}

private void sendMessage( final String text ) {
    new Thread( new Runnable() {
        @Override
        public void run() {
            NodeApi.GetConnectedNodesResult nodes = Wearable.NodeApi.getConnectedNodes( mApiClient ).await();
            for(Node node : nodes.getNodes()) {
                Log.e("MainActivity", "node id: " + node.getId() );
                MessageApi.SendMessageResult result = Wearable.MessageApi.sendMessage(
                        mApiClient, node.getId(), text, null).await();
            }

            runOnUiThread( new Runnable() {
                @Override
                public void run() {
                    mEditText.setText( "" );
                }
            });
        }
    }).start();
}

有人对我可能遗漏的内容有任何建议吗？我可以回退到使用服务，但如果可以的话，我想尝试让它与 Activity 一起使用。

谢谢!

Answer 1

所以事实证明 onMessageReceived 在它自己的线程上运行，而不是 UI 线程，所以你必须在 runOnUiThread 中包装 toast 消息和任何你自己的 UI 代码。