要使用Android API 29时解决Ricoh Theta连接问题，您可以按照以下步骤进行操作：

1. 确保您的Android项目已经设置了正确的权限。在AndroidManifest.xml文件中添加以下权限：

2. 在您的Activity或Fragment中，使用以下代码创建和管理Theta连接：

import org.theta4j.osc.OscCommand;
import org.theta4j.osc.commands.CheckForUpdatesCommand;
import org.theta4j.osc.commands.ExecuteCommand;
import org.theta4j.osc.responses.CheckForUpdatesResponse;
import org.theta4j.osc.responses.ExecuteResponse;

import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.functions.Consumer;
import io.reactivex.schedulers.Schedulers;

public class MainActivity extends AppCompatActivity {
    private ThetaService thetaService;

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

        thetaService = new ThetaService("http://192.168.1.1:80/osc");

        // 检查固件更新
        thetaService.getThetaApi().checkForUpdates()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer() {
                    @Override
                    public void accept(CheckForUpdatesResponse response) throws Exception {
                        // 处理检查固件更新的响应
                    }
                }, new Consumer() {
                    @Override
                    public void accept(Throwable throwable) throws Exception {
                        // 处理错误
                    }
                });

        // 执行Theta命令
        thetaService.getThetaApi().execute(new ExecuteCommand("camera.takePicture"))
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Consumer() {
                    @Override
                    public void accept(ExecuteResponse response) throws Exception {
                        // 处理执行Theta命令的响应
                    }
                }, new Consumer() {
                    @Override
                    public void accept(Throwable throwable) throws Exception {
                        // 处理错误
                    }
                });
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        thetaService.dispose();
    }
}

3. 创建一个ThetaService类，用于管理Theta连接和API请求：

import org.theta4j.osc.OscClient;
import org.theta4j.osc.OscCommand;
import org.theta4j.osc.OscCommandRequest;
import org.theta4j.osc.OscCommandResponse;
import org.theta4j.osc.OscPayload;
import org.theta4j.osc.commands.CheckForUpdatesCommand;
import org.theta4j.osc.commands.ExecuteCommand;
import org.theta4j.osc.responses.CheckForUpdatesResponse;
import org.theta4j.osc.responses.ExecuteResponse;

import io.reactivex.Single;

public class ThetaService {
    private OscClient oscClient;

    public ThetaService(String oscUrl) {
        oscClient = new OscClient(oscUrl);
    }

    public Single checkForUpdates() {
        CheckForUpdatesCommand command = new CheckForUpdatesCommand();
        return sendCommand(command, CheckForUpdatesResponse.class);
    }

    public Single execute(ExecuteCommand command) {
        return sendCommand(command, ExecuteResponse.class);
    }

    private  Single sendCommand(OscCommand command, Class responseType) {
        OscCommandRequest request = new OscCommandRequest<>(command, responseType);
        return oscClient.send(request)
                .map(OscPayload::getContent)
                .map(responseType::cast);
    }

    public void dispose() {
        oscClient.dispose();
    }
}

4. 确保您已经包含了theta4j库的依赖项。在您的app/build.gradle文件中添加以下依赖项：

dependencies {
    implementation 'org.theta4j:theta-api:0.10.0'
    implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
}

请注意，您需要将上述示例中的IP地址替换为您的Theta设备的实际IP地址。

这样，您就可以在Android API 29上使用Ricoh Theta连接，并执行各种操作。