如何在android studio中裁剪mapbox中的语音指令？

import com.mapbox.api.directions.v5.models.VoiceInstructions;
import com.mapbox.services.android.navigation.v5.navigation.NavigationRoute;
import com.mapbox.api.navigation.v1.navigation.NavigationRoute;

public class MainActivity extends AppCompatActivity {
    private MapboxMap mapboxMap;
    private MapView mapView;
    private SpeechAPIClient speechAPIClient;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Mapbox.getInstance(this, "YOUR_MAPBOX_ACCESS_TOKEN");
        setContentView(R.layout.activity_main);
        mapView = findViewById(R.id.mapView);
        mapView.onCreate(savedInstanceState);
        
        mapView.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(@NonNull MapboxMap mapboxMap) {
                MainActivity.this.mapboxMap = mapboxMap;
                
                // 初始化语音指令API客户端
                speechAPIClient = MapboxSpeechAPIClient.fromMapboxAccessToken("YOUR_MAPBOX_ACCESS_TOKEN");
                
                // 调用导航路线API获取导航数据
                NavigationRoute.builder(MainActivity.this)
                        .accessToken("YOUR_MAPBOX_ACCESS_TOKEN")
                        .origin(Point.fromLngLat(-122.42, 37.78))
                        .destination(Point.fromLngLat(-77.03, 38.91))
                        .build()
                        .getRoute(new Callback<DirectionsResponse>() {
                            @Override
                            public void onResponse(Call<DirectionsResponse> call, Response<DirectionsResponse> response) {
                                DirectionsRoute route = response.body().routes().get(0);
                                
                                // 获取语音指令数据
                                List<VoiceInstructions> voiceInstructions = route.voiceInstructions();
                                
                                // 裁剪语音指令
                                String croppedVoiceInstruction = voiceInstructions.get(0).announcement().substring(0, 10);
                                
                                // 播放语音指令
                                playVoiceInstruction(croppedVoiceInstruction);
                            }
                            
                            @Override
                            public void onFailure(Call<DirectionsResponse> call, Throwable throwable) {
                                // 处理导航路线请求失败的情况
                            }
                        });
            }
        });
    }
    
    private void playVoiceInstruction(String voiceInstruction) {
        // 使用MediaPlayer或其他库播放语音指令
        // TODO: Implement voice instruction playback
    }
    
    @Override
    protected void onStart() {
        super.onStart();
        mapView.onStart();
    }

    @Override
    protected void onResume() {
        super.onResume();
        mapView.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mapView.onPause();
    }

    @Override
    protected void onStop() {
        super.onStop();
        mapView.onStop();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        mapView.onSaveInstanceState(outState);
    }

    @Override
    public void onLowMemory() {
        super.onLowMemory();
        mapView.onLowMemory();
    }

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