java - 转换为十进制格式时出错

Question

嘿伙计们，我正在使用 GPS 位置，所以我正在获取坐标，我现在需要的是将这些坐标传递到我的网络服务并将其存储到我的数据库中。但我无法以正确的方式存储它，我认为我得到的数据对于数据库来说太大了，这就是为什么我试图将坐标转换为十进制格式。当我将 DecimaFormat 方法放入代码中时，我遇到了一些错误，你们能帮助我吗？

以下是错误:

03-13 22:03:16.733: E/WindowManager(1018): Activity com.example.projectthesis.Mapping2 has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@41319870 that was originally added here
03-13 22:03:16.733: E/WindowManager(1018): android.view.WindowLeaked: Activity com.example.projectthesis.Mapping2 has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@41319870 that was originally added here
03-13 22:03:16.733: E/WindowManager(1018):  at android.view.ViewRootImpl.<init>(ViewRootImpl.java:344)
03-13 22:03:16.733: E/WindowManager(1018):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:267)
03-13 22:03:16.733: E/WindowManager(1018):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:215)
03-13 22:03:16.733: E/WindowManager(1018):  at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:140)
03-13 22:03:16.733: E/WindowManager(1018):  at android.view.Window$LocalWindowManager.addView(Window.java:537)
03-13 22:03:16.733: E/WindowManager(1018):  at android.app.Dialog.show(Dialog.java:278)
03-13 22:03:16.733: E/WindowManager(1018):  at com.example.projectthesis.Mapping2$phpconnect.onPreExecute(Mapping2.java:190)
03-13 22:03:16.733: E/WindowManager(1018):  at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:561)
03-13 22:03:16.733: E/WindowManager(1018):  at android.os.AsyncTask.execute(AsyncTask.java:511)
03-13 22:03:16.733: E/WindowManager(1018):  at com.example.projectthesis.Mapping2$GPSLocationListener.onLocationChanged(Mapping2.java:124)
03-13 22:03:16.733: E/WindowManager(1018):  at android.location.LocationManager$ListenerTransport._handleMessage(LocationManager.java:234)
03-13 22:03:16.733: E/WindowManager(1018):  at android.location.LocationManager$ListenerTransport.access$000(LocationManager.java:167)
03-13 22:03:16.733: E/WindowManager(1018):  at android.location.LocationManager$ListenerTransport$1.handleMessage(LocationManager.java:183)
03-13 22:03:16.733: E/WindowManager(1018):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-13 22:03:16.733: E/WindowManager(1018):  at android.os.Looper.loop(Looper.java:137)
03-13 22:03:16.733: E/WindowManager(1018):  at android.app.ActivityThread.main(ActivityThread.java:4424)
03-13 22:03:16.733: E/WindowManager(1018):  at java.lang.reflect.Method.invokeNative(Native Method)
03-13 22:03:16.733: E/WindowManager(1018):  at java.lang.reflect.Method.invoke(Method.java:511)
03-13 22:03:16.733: E/WindowManager(1018):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-13 22:03:16.733: E/WindowManager(1018):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-13 22:03:16.733: E/WindowManager(1018):  at dalvik.system.NativeStart.main(Native Method)

这些是我的代码(特别是传递过程和 DecimalFormat 方法):

class phpconnect extends AsyncTask<String, String, String> {
        /**
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(Mapping2.this);
            pDialog.setMessage("Logging in..");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }
        @Override
        protected String doInBackground(String... args) {
            String strLatitude = Long.toString(ILatitude);
            String strLongitude = Long.toString(ILongitude);

            DecimalFormat df = new DecimalFormat("###.00000");
            String frmLat = df.format(strLatitude);
            String frmLong = df.format(strLongitude);
            // Building parameters
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("latitude", frmLat));
            params.add(new BasicNameValuePair("longitude", frmLong));
            // getting JSON Object
            // Note that create product url accepts POST method
            JSONObject json = jsonParser.makeHttpRequest(url_create_product,
                    "POST", params);
            // check log cat fro response
            Log.d("Create Response", json.toString());
            try {
                int success = json.getInt(TAG_SUCCESS);
                if (success == 1) {
                    // successfully updated
                    Intent i = new Intent(getApplicationContext(),
                            Mapping2.class);

                    startActivity(i);
                    // closing this screen
                    finish();
                } else {
                    // failed to create product
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
            return null;
        }
    }

Answer 1

我在你的代码中发现奇怪的是ILatitude和ILongitude显然是Long类型。纬度和经度最好用 double 值表示。我认为这里并不真正需要 DecimalFormat ，考虑到您将 ILatitude 设置为 double ，一个简单的 String.valueOf(ILatitude); 就足够了。