[問題] GPS程式問題

看板Eclipse作者skywillnosky (Alfred)時間14年前 (2010/08/18 19:09)推噓3(3推 0噓 5→)

留言8則, 6人參與討論串1/1

今天有打一個用基地台定位的手機程式目前只有在模擬器上跑過可是只要跑到append那裡似乎就會出錯出錯的意思就是跑出"sorry"的那個視窗把那部份註解掉程式可跑以下是完整程式碼 .java //*************************************// package com.demo.android.mylocation; import android.app.Activity; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.widget.Toast; import android.location.Criteria; import android.util.Log; public class MyLocation extends Activity implements LocationListener{ /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); updateStat(); } private LocationManager mgr; private String best; private void updateStat() { // TODO Auto-generated method stub mgr = (LocationManager) getSystemService(LOCATION_SERVICE); Criteria criteria = new Criteria(); best = mgr.getBestProvider(criteria, true); Location location = mgr.getLastKnownLocation(best); StringBuffer msg = new StringBuffer(); msg.append("Latitude: "); //有問題部份 //msg.append(Double.toString(location.getLatitude())); //** msg.append(", Longitude: "); //有問題部份 //msg.append(Double.toString(location.getLongitude())); //** Toast.makeText(this, msg, Toast.LENGTH_LONG).show(); } @Override public void onLocationChanged(Location location) { // TODO Auto-generated method stub Toast.makeText(this, location.toString(), Toast.LENGTH_LONG).show(); } @Override public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } @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 } protected void onResume() { super.onResume(); mgr.requestLocationUpdates(best, 60000, 1, this); } @Override protected void onPause(){ super.onPause(); mgr.removeUpdates(this); } } 還有一個部份 (有改動的)Manifest //*************************************// 主要改動部份:(都是新增) android.permission.ACCESS_COARSE_LOCATION android.permission.ACCESS_FINE_LOCATION android.permission.INTERNET //*************************************// <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.demo.android.mylocation" android:versionCode="1" android:versionName="1.0"> <application android:icon="@drawable/icon" android:label="@string/app_name"> <activity android:name=".MyLocation" 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> <uses-sdk android:minSdkVersion="3" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission> <uses-permission android:name="android.permission.INTERNET"></uses-permission> </manifest> 其他部分是沒有改動的一行一行試的結果確定是append那裡出問題 append()直接給予字串不會有錯可是在裡面引用其他函數或別的東西就會出現問題而去論壇有找過好向也沒有相關文章都是找到中文出勘誤的= = 有哪位神手大大可以給建議嗎? 感激不盡 PS:版面有點亂<(_ _)> 剛剛又試了一下發現.getLatitude()這類的函數一用就會出錯 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 203.64.183.231