安卓开发百度地图公交查询

以下是一个基于Android平台的百度地图公交查询的示例代码：

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.search.busline.BusLineResult;
import com.baidu.mapapi.search.busline.BusLineSearch;
import com.baidu.mapapi.search.busline.OnGetBusLineSearchResultListener;
import com.baidu.mapapi.search.busline.BusLineSearchOption;

public class MainActivity extends AppCompatActivity implements OnGetBusLineSearchResultListener {

    private MapView mMapView;
    private BaiduMap mBaiduMap;
    private EditText mEditText;
    private Button mButton;
    private TextView mTextView;
    private BusLineSearch mBusLineSearch;

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

        mMapView = findViewById(R.id.mapView);
        mBaiduMap = mMapView.getMap();
        mEditText = findViewById(R.id.editText);
        mButton = findViewById(R.id.button);
        mTextView = findViewById(R.id.textView);

        mBusLineSearch = BusLineSearch.newInstance();
        mBusLineSearch.setOnGetBusLineSearchResultListener(this);

        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String busLine = mEditText.getText().toString();
                BusLineSearchOption option = new BusLineSearchOption();
                option.city("广州");
                option.uid(busLine);
                mBusLineSearch.searchBusLine(option);
            }
        });
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMapView.onDestroy();
        mBusLineSearch.destroy();
    }

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

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

    @Override
    public void onGetBusLineResult(BusLineResult busLineResult) {
        if (busLineResult != null && busLineResult.error == BusLineResult.ERRORNO.NO_ERROR) {
            mTextView.setText(busLineResult.getBusLineName());
        } else {
            mTextView.setText("未找到公交线路");
        }
    }
}

这个示例代码实现了一个简单的百度地图公交查询应用。用户可以在输入框中输入公交线路的UID，点击按钮后会在地图上显示该公交线路，并在文本框中显示公交线路的名称。