src/com/wind/whereami/LocationSend.java
package com.wind.whereami; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.provider.Settings; import android.util.Log; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class LocationSend extends Activity implements OnClickListener { protected static final String TAG = "LocationSend"; private Button mSendLocationButton; private Button mGetLocationButton; private TextView mLocationInfo; private LocationManager mLocationManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_location_send); mSendLocationButton = (Button) this.findViewById(R.id.send_location); mGetLocationButton = (Button) this.findViewById(R.id.get_location); mLocationInfo = (TextView) this.findViewById(R.id.location_info); mSendLocationButton.setOnClickListener(this); mGetLocationButton.setOnClickListener(this); mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.location_send, menu); return true; } @Override public void onClick(View v) { if (v == mSendLocationButton) { /* * 发起地址信息短串请求,一个位置的地理信息一可以通过GeoCode/反GeoCode搜索获得. * mSearch 为 MKSearch象, * 参数pt为要分享的位置的经纬度坐标 ,name和addr为百度地图客户端在展示该位置时显示的名称和地址. */ //GeoPoint pt = new GeoPoint((int)(39.945*1E6),(int)(116.404*1E6)); } else if (v == mGetLocationButton) { //方法1:指定GPS或者Network来获取位置 /*checkGPSSettings(); Location location = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 1, locationListener);*/ checkNetworkSettings(); Location location = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); mLocationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 2000, 1, locationListener); getLocationInfo(location); //方法2:获取高精度的位置 //getLocation(); } } private Location getLocation() { //查找服务信息 Criteria criteria = new Criteria(); criteria.setAccuracy(Criteria.ACCURACY_FINE); //定位精度: 最高 criteria.setAltitudeRequired(false); //海拔信息:不需要 criteria.setBearingRequired(false); //方位信息: 不需要 criteria.setCostAllowed(true); //是否允许付费 criteria.setPowerRequirement(Criteria.POWER_LOW); //耗电量: 低功耗 String provider = mLocationManager.getBestProvider(criteria, true); //获取Provider信息,为gps或network Log.v(TAG, "provider = " + provider); Location location = mLocationManager.getLastKnownLocation(provider); mLocationManager.requestLocationUpdates(provider, 1000, 0, locationListener); return location; } private void checkGPSSettings() { if (mLocationManager.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) { Toast.makeText(this, "GPS模块正常", Toast.LENGTH_SHORT).show(); return; } Toast.makeText(this, "请开启GPS!", Toast.LENGTH_SHORT).show(); Intent intent = new Intent(Settings.ACTION_LOCALE_SETTINGS); startActivityForResult(intent, 0); // 此为设置完成后返回到获取界面 } private void checkNetworkSettings() { if (mLocationManager.isProviderEnabled(android.location.LocationManager.NETWORK_PROVIDER)) { Toast.makeText(this, "NETWORK_PROVIDER模块正常", Toast.LENGTH_SHORT).show(); return; } Toast.makeText(this, "请开启NETWORK_PROVIDER!", Toast.LENGTH_SHORT).show(); Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); startActivityForResult(intent, 0); // 此为设置完成后返回到获取界面 } private void getLocationInfo(Location location) { String latLongInfo; if (location != null) { double lat = location.getLatitude(); double lng = location.getLongitude(); latLongInfo = "Lat:" + lat + "nLong:" + lng; mLocationInfo.setText(latLongInfo); } else { latLongInfo = "No location found"; mLocationInfo.setText(latLongInfo); } } private final LocationListener locationListener = new LocationListener() { @Override public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub Log.v(TAG, "onStatusChanged"); } @Override public void onProviderEnabled(String provider) { getLocationInfo(null); Log.v(TAG, "onProviderEnabled"); } @Override public void onProviderDisabled(String provider) { getLocationInfo(null); Log.v(TAG, "onProviderDisabled"); } @Override public void onLocationChanged(Location location) { getLocationInfo(location); Toast.makeText(LocationSend.this, "onLocationChanged", 3000).show(); } }; }
2. 记得添加权限
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.wind.whereami" android:versionCode="1" android:versionName="1.0" > <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> <uses-permission android:name="android.permission.INTERNET" /> <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="17" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.wind.whereami.LocationSend" 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> </manifest>
3. 使用的layout文件
/res/layout/activity_location_send.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".LocationSend" android:orientation="vertical"> <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" /> <Button android:id="@+id/send_location" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/textView1" android:text="@string/send_location" /> <Button android:id="@+id/get_location" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignRight="@+id/textView1" android:layout_below="@+id/button1" android:text="@string/get_location" /> <TextView android:id="@+id/location_info" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/button2" android:layout_below="@+id/button2" android:layout_marginTop="19dp" android:text="@string/location_info" /> </LinearLayout>补充一点,很多人会说,GPS无法定位,Location location = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
location一直为空。我解释一下:去调用这个函数,多大数返回都是空的,因为GPS没有那么强,一下就获取到位置了。所以会注册一个listener来监听位置的改变
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 1, locationListener);
有人还说会拿不到数据,那么你首先确定你的GPS是好用的(我就犯过错误是用网络定过之后百度地图上留下了我最近的位置,关掉网络,还是能定位,貌似是GPS定的,实际上我的GPS根本不能用,只好的测试方法就是到户外,看看GPS会不会跟着你走,顺便测试下你写的程序)