method 'java.lang.String java.lang.String.trim()' on a null object refere

[r1374065]

新手求助
5-24 02:49:39.422 29044-29044/baidumapsdk.demo E/AndroidRuntime: FATAL EXCEPTION: main
Process: baidumapsdk.demo, PID: 29044
java.lang.RuntimeException: Unable to start activity ComponentInfo{baidumapsdk.demo/baidumapsdk.demo.map.OverlayDemo}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.trim()' on a null object reference

package baidumapsdk.demo.map;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.SeekBar;
import android.widget.Toast;

import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.BaiduMap.OnMarkerClickListener;
import com.baidu.mapapi.map.BaiduMap.OnMarkerDragListener;
import com.baidu.mapapi.map.BitmapDescriptor;
import com.baidu.mapapi.map.BitmapDescriptorFactory;
import com.baidu.mapapi.map.GroundOverlayOptions;
import com.baidu.mapapi.map.InfoWindow;
import com.baidu.mapapi.map.InfoWindow.OnInfoWindowClickListener;
import com.baidu.mapapi.map.MapStatusUpdate;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.map.Marker;
import com.baidu.mapapi.map.MarkerOptions;
import com.baidu.mapapi.map.MarkerOptions.MarkerAnimateType;
import com.baidu.mapapi.map.OverlayOptions;
import com.baidu.mapapi.model.LatLng;
import com.baidu.mapapi.model.LatLngBounds;
import com.baidu.mapapi.utils.SpatialRelationUtil;

import org.json.JSONArray;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

import baidumapsdk.demo.BMapApiDemoMain;
import baidumapsdk.demo.R;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

/**
 * 演示覆盖物的用法
 */
public class OverlayDemo extends Activity {

    /**
     * MapView 是地图主控件
     */

    private String array[][] = new String[1000][9];
    private MapView mMapView;
    private BaiduMap mBaiduMap;
    private Marker[]  mMarker;
  

    private void sendRequestWithOkHttp(){
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    OkHttpClient client=new OkHttpClient();
                    Request request= new Request.Builder()
                            .url("http://api.map.baidu.com/geodata/v3/poi/list?geotable_id=168402&page_size=200&ak=pgzsdGsmgmlPj55SP0BRVzk2oAvjjHcj")
                            .build();
                    Response response = client.newCall(request).execute();
                    String responseData=response.body().string();
                    if(response.isSuccessful()){
                        Log.d("OKHttp",responseData);

                    }


                    //if(!TextUtils.isEmpty(responseData)){
                    parseJSONWithJSONObject(responseData);

                }catch (Exception e){
                    e.printStackTrace();
                }
            }
        }).start();
    }
    private void showResponse(final  String response){
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
            }
        });
    }

    public void parseJSONWithJSONObject(String jsonData){
      
        try {
            JSONObject jsonObject=new JSONObject(jsonData);
            JSONArray jsonArray=jsonObject.getJSONArray("pois");

            for(int i=0;i<array.length;i++){
                JSONObject sonObject=jsonArray.getJSONObject(i);

               ;

                String id= sonObject.getString("id");
                String address=sonObject.getString("address");
                String province=sonObject.getString("province");
                String city=sonObject.getString("city");
                //String create_time=sonObject.getString("create_time");
                String location=sonObject.getString("location");
                //String gcj_location=sonObject.getString("gcj_location");
                String radii=sonObject.getString("radii");
                String level=sonObject.getString("level");
                String hazard=sonObject.getString("hazard");
             
                String id1= location.substring(1,location.lastIndexOf(","));
                String id2= location.substring(location.lastIndexOf(",")+1,location.length()-1);
                array[i][0]=id;
                array[i][1]=address;
                array[i][2]=province;
                array[i][3]=city;
                array[i][4]=id1;
                array[i][5]=id2;
                array[i][6]=radii;
                array[i][7]=level;
                array[i][8]=hazard;

             
                Log.d("OverlayDemo",address);
                Log.d("OverlayDemo",province);
                Log.d("OverlayDemo",city);
            
                Log.d("OverlayDemo",id);
               
                Log.d("OverlayDemo",location);
              
                Log.d("OverlayDemo",radii);
                Log.d("OverlayDemo",level);
                Log.d("OverlayDemo",hazard);
               

            }


        }catch (Exception e){
            e.printStackTrace();
        }
    }



    // 初始化全局 bitmap 信息，不用时及时 recycle
 
    BitmapDescriptor bdGround = BitmapDescriptorFactory
            .fromResource(R.drawable.ground_overlay);

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_overlay);


    
        mMapView = (MapView) findViewById(R.id.bmapView);
        mBaiduMap = mMapView.getMap();
        MapStatusUpdate msu = MapStatusUpdateFactory.zoomTo(14.0f);
        mBaiduMap.setMapStatus(msu);

        sendRequestWithOkHttp();
        //initOverlay();
        mMarker=new Marker[array.length];
        for (int i=0;i<array.length;i++){
            double longitude= Double.parseDouble(array[i][4]);
            double latitude= Double.parseDouble(array[i][5]);

LatLng latLng=new LatLng(latitude,longitude);
            OverlayOptions radpacketC = new MarkerOptions().position(latLng).icon(bdGround);
            mMarker[i] = (Marker) (mBaiduMap.addOverlay(radpacketC));
        }
        mBaiduMap.setOnMarkerClickListener(new OnMarkerClickListener() {
            public boolean onMarkerClick(final Marker marker) {


                ArrayList<LatLng> latlist = new ArrayList<LatLng>();
        
              // ArrayList lable = new ArrayList();
                //取到所有经纬度
                for (int k = 0; k < array.length; k++) {
                    double lat=Double.parseDouble(array[k][5]);double lng=Double.parseDouble(array[k][4]);
                    LatLng allLat = new LatLng(lat, lng);
                    latlist.add(allLat);
                }
                //循环所有覆盖物
                for (int i = 0; i < array.length; i++) {
                    //判断点击的覆盖物
                    if (marker == mMarker[i]) {
                        //获取点击的这个覆盖物的经纬
                        double lat=Double.parseDouble(array[i][5]);double lng=Double.parseDouble(array[i][4]);
                       // LatLng clicklat = new LatLng(lat, lng);
                        //移除点击的这个覆盖物的经纬度
                        latlist.remove(i);
                        //boolean is = false;
                        //判断点击的覆盖物是否被重叠


                            }
                        }

                return true;
             
            }
        });
    }

  

    /**
     * 清除所有Overlay
     *
     * @param view
     */
    public void clearOverlay(View view) {
        mBaiduMap.clear();
       /* mMarkerA = null;
        mMarkerB = null;
        mMarkerC = null;
        mMarkerD = null;*/
    }

    /**
     * 重新添加Overlay
     *
     * @param view
     */
    public void resetOverlay(View view) {
        //clearOverlay(null);
       // initOverlay();
    }

 /* private class SeekBarListener implements SeekBar.OnSeekBarChangeListener {

        @Override
        public void onProgressChanged(SeekBar seekBar, int progress,
                                      boolean fromUser) {
            // TODO Auto-generated method stub
           // float alpha = ((float) seekBar.getProgress()) / 10;
           if (mMarkerA != null) {
                mMarkerA.setAlpha(alpha);
            }
            if (mMarkerB != null) {
                mMarkerB.setAlpha(alpha);
            }
            if (mMarkerC != null) {
                mMarkerC.setAlpha(alpha);
            }
            if (mMarkerD != null) {
                mMarkerD.setAlpha(alpha);
            }
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub
        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            // TODO Auto-generated method stub
        }

    }*/

    @Override
    protected void onPause() {
        // MapView的生命周期与Activity同步，当activity挂起时需调用MapView.onPause()
        mMapView.onPause();
        super.onPause();
    }

    @Override
    protected void onResume() {
        // MapView的生命周期与Activity同步，当activity恢复时需调用MapView.onResume()
        mMapView.onResume();
        super.onResume();
    }

    @Override
    protected void onDestroy() {
        // MapView的生命周期与Activity同步，当activity销毁时需调用MapView.destroy()
        mMapView.onDestroy();
        super.onDestroy();
        // 回收 bitmap 资源
   
        bdGround.recycle();
    }

}

[r1374065]

引用 2 楼 heaimnmn 的回复:

空指针了噻，有控件没有赋值

版主大人能不能帮忙看看jdon解析的数据放到数组拿出来用有没有问题 哪个控件没赋值

[南瓜饼]

你的字符串是空的怎么能调用trim函数呢 找到报错哪行 改掉

[r1374065]

引用 4 楼 wenwei19861106 的回复:

你的字符串是空的怎么能调用trim函数呢 找到报错哪行 改掉

我没用trim函数啊 只有一个这个String id1= location.substring(1,location.lastIndexOf(",")); 安装到手机里 点开程序直接崩溃了 好像没有说哪一行 大神帮我看看array[][]这个数组是不是用错了 05-24 14:22:08.503 6920-6920/baidumapsdk.demo E/AndroidRuntime: FATAL EXCEPTION: main Process: baidumapsdk.demo, PID: 6920 java.lang.RuntimeException: Unable to start activity ComponentInfo{baidumapsdk.demo/baidumapsdk.demo.map.OverlayDemo}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.trim()' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2423) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2483) at android.app.ActivityThread.access$900(ActivityThread.java:153) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1349) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5438) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629) Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.trim()' on a null object reference at java.lang.StringToReal.parseDouble(StringToReal.java:263) at java.lang.Double.parseDouble(Double.java:301) at baidumapsdk.demo.map.OverlayDemo.onCreate(OverlayDemo.java:199) at android.app.Activity.performCreate(Activity.java:6303) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2376) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2483)  at android.app.ActivityThread.access$900(ActivityThread.java:153)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1349)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:148)  at android.app.ActivityThread.main(ActivityThread.java:5438)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629) 

[r1374065]

[哎，真难]

空指针了噻，有控件没有赋值