这是activity界面的代码:
package com.example.tianditu;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import com.tianditu.android.maps.GeoPoint;
import com.tianditu.android.maps.MapActivity;
import com.tianditu.android.maps.MapController;
import com.tianditu.android.maps.MapView;
public class MainActivity extends MapActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MapView mMapView = (MapView) findViewById(R.id.main_mapview);
//设置启用内置的缩放控件
mMapView.setBuiltInZoomControls(true);
//得到mMapView的控制权,可以用它控制和驱动平移和缩放
MapController mMapController = mMapView.getController();
//用给定的经纬度构造一个GeoPoint,单位是微度 (度 * 1E6)
GeoPoint point = new GeoPoint((int) (39.915 * 1E6), (int) (116.404 * 1E6));
//设置地图中心点
mMapController.setCenter(point);
//设置地图zoom级别
mMapController.setZoom(12);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
}
这是Manifest界面的代码:
<?xml version="1.0" encoding="utf-8"?>
package="com.example.tianditu"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.tianditu.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
整个程序都没有报错,但是运行之后就会出现“Target host must not be null, or set in parameters. scheme=null, host=null, path=“错误,求教各位大神,出错在哪里