Android 百度地图开发 模拟器老是不能打开，求大神指点

Question

package com.home.baidumap;import com.baidu.mapapi.SDKInitializer;import com.baidu.mapapi.map.MapView;import android.app.Activity;import android.os.Bundle;import android.view.Window;public class MainActivity extends Activity { MapView mMapView=null;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        //在使用SDK各组件之前初始化context信息，传入ApplicationContext          //注意该方法要再setContentView方法之前实现          SDKInitializer.initialize(getApplicationContext());          //获取地图控件引用        mMapView = (MapView) findViewById(R.id.id_bmapView);        setContentView(R.layout.activity_main);      }      @Override      protected void onDestroy() {          super.onDestroy();          //在activity执行onDestroy时执行mMapView.onDestroy()，实现地图生命周期管理          mMapView.onDestroy();      }          @Override    protected void onResume() {     super.onResume();     mMapView.onResume();    }      @Override      protected void onPause() {          super.onPause();          //在activity执行onPause时执行mMapView. onPause ()，实现地图生命周期管理          mMapView.onPause();          }   }Logcat提示错处：08-22 11:22:02.320: E/AndroidRuntime(1804): FATAL EXCEPTION: mainProcess: com.home.baidumap, PID: 1804 java.lang.RuntimeException: Unable to resume activity {com.home.baidumap/com.home.baidumap.MainActivity}: java.lang.NullPointerException  at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2788) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2817) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2250)  at android.app.ActivityThread.access$800(ActivityThread.java:135)at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136)  at android.app.ActivityThread.main(ActivityThread.java:5017) at java.lang.reflect.Method.invokeNative(Native Method)at java.lang.reflect.Method.invoke(Method.java:515)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) E/AndroidRuntime(1804):  at dalvik.system.NativeStart.main(Native Method)Caused by: java.lang.NullPointerExceptionat com.home.baidumap.MainActivity.onResume(MainActivity.java:40)  at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1192) at android.app.Activity.performResume(Activity.java:5310) E/AndroidRuntime at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2778)

Answer 1

楼上的回答是代码的错误，Logcat中报的错误。另外测试地图类的Demo还是用真机测试吧，模拟器不一定支持。