Android GPS 开发

AndroidManifest.xml

<uses-permission android:name="android.permission.RESTART_PACKAGES" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>

main.java
package com.mrsoft.mrgps.app.mr;import android.app.Activity;import android.app.ActivityManager;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.content.Context;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.location.Criteria;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.os.Bundle;import android.view.KeyEvent;import android.view.Menu;import android.view.MenuItem;import android.widget.TextView;import android.widget.Toast;public class main extends Activity {    private TextView tv;    private LocationManager lm;    private Criteria criteria;    private Location location;    private final static int MENU_ABOUT = Menu.FIRST;      private final static int MENU_EXIT = Menu.FIRST+1;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                tv = (TextView)findViewById(R.id.tv);                lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);                if (!lm.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER))        {            Toast.makeText(this, "GPS已关闭,请手动开启GPS后再试！", Toast.LENGTH_SHORT).show();            return;        }        else        {            Toast.makeText(this, "GPS定位中...", Toast.LENGTH_SHORT).show();        }                criteria = new Criteria();        criteria.setAccuracy(Criteria.ACCURACY_FINE);    // 设置精确度        criteria.setAltitudeRequired(true);                // 设置请求海拔        criteria.setBearingRequired(true);                // 设置请求方位        criteria.setCostAllowed(true);                    // 设置允许运营商收费        criteria.setPowerRequirement(Criteria.POWER_LOW); // 低功耗                String provider = lm.getBestProvider(criteria, true);        location = lm.getLastKnownLocation(provider);        newLocalGPS(location);        // 监听1秒一次 忽略位置变化        lm.requestLocationUpdates(provider, 1*1000, 0, new locationListener());    }        class locationListener implements LocationListener    {        @Override        public void onLocationChanged(Location location) {            // TODO Auto-generated method stub            newLocalGPS(location);        }        @Override        public void onProviderDisabled(String provider) {            // TODO Auto-generated method stub            newLocalGPS(null);        }        @Override        public void onProviderEnabled(String provider) {            // TODO Auto-generated method stub                    }        @Override        public void onStatusChanged(String provider, int status, Bundle extras) {            // TODO Auto-generated method stub                    }            }        private void newLocalGPS(Location location)    {        if (location!=null)        {            double latitude = location.getLatitude(); //精度            double longitude = location.getLongitude(); // 纬度            double speed = location.getSpeed();    // 速度            double altitude = location.getAltitude();    // 海拔            double bearing = location.getBearing();    // 方位            tv.setText("精度"+latitude+'\n'+                           "纬度"+longitude+'\n'+                           "速度"+speed+"m/s"+'\n'+                           "海拔"+altitude+"m"+'\n'+                           "方位"+bearing+'\n');        }        else        {            // 未获取地理信息位置            tv.setText("地理信息位置未知或正在获取地理信息位置中...");        }    }        @Override    public boolean onCreateOptionsMenu(Menu menu) {        // TODO Auto-generated method stub        menu.add(0, MENU_ABOUT, 1, "关于");          menu.add(0, MENU_EXIT, 2, "退出");        return super.onCreateOptionsMenu(menu);    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // TODO Auto-generated method stub        switch (item.getItemId())        {        case MENU_ABOUT:             AlertDialog.Builder bd = new Builder(main.this);                  bd.setMessage("mrGPS.apk\n版本:1.0\n作者:mrandexe");                  bd.setTitle("关于");                  bd.setPositiveButton("确认", new OnClickListener(){                      @Override                      public void onClick(DialogInterface arg0, int arg1) {                          // TODO Auto-generated method stub                          arg0.dismiss();                      }                  });                  bd.create().show();             break;        case MENU_EXIT:            exit();            break;        }        return super.onOptionsItemSelected(item);    }    @Override      public boolean onKeyDown(int keyCode, KeyEvent event) {          // TODO Auto-generated method stub          if (keyCode==KeyEvent.KEYCODE_BACK && event.getRepeatCount()==0)          {              exit();              return true;          }          return super.onKeyDown(keyCode, event);      }         private void exit()      {           AlertDialog.Builder builder = new Builder(main.this);           builder.setMessage("确认退出吗？");           builder.setTitle("提示");           builder.setPositiveButton("确认", new OnClickListener(){               @Override               public void onClick(DialogInterface arg0, int arg1) {                   // TODO Auto-generated method stub                   arg0.dismiss();                 ActivityManager actMgr = (ActivityManager)getSystemService(ACTIVITY_SERVICE);                   actMgr.restartPackage(getPackageName());             }           });           builder.setNegativeButton("取消", new OnClickListener(){               @Override               public void onClick(DialogInterface dialog, int which) {                   // TODO Auto-generated method stub                   dialog.dismiss();               }           });           builder.create().show();             }}
main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:text="TextView" android:layout_width="wrap_content" android:id="@+id/tv" android:layout_height="wrap_content"></TextView></LinearLayout>
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