php - Android数据到PHP到MYSQL

Question

我已经在android上开发了一个应用程序，它的工作是使用Google Maps API收集地点的gps坐标，然后用户必须将地点的信息输入到坐标并通过php提交到mysql数据库。我的问题是，除了将数据提交到php进行处理外，是否能够做所有事情。是android开发的新手，对您的任何帮助将不胜感激，一个很好的解释让我下一次独奏也很棒。谢谢

PS：一切都在一个文件中，因为我正在使用Samsung Galaxy标签上的AIDE开发，而基本版本则不允许外部文件。

package com.gpsproject.stgps;

import android.app.*;
import android.os.*;
import android.view.*;
import android.view.View.*;
import android.widget.*;
import android.location.*;

import java.io.*;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.text.*;
import javax.xml.transform.*;

public class MainActivity extends Activity
{
private Button btnsave;
private EditText bizname;
private EditText bizaddr;
private EditText bizphone;
private EditText bizemail;
private EditText bizwebsite;
private EditText bizarea;
private EditText bizdescription;
private TextView txtinfo;
Location location;
String params;
String errmsg;
Boolean saveData = false;
static final String MOTHERSHIP = "[MyServerAddress/server.php";

LocationListener myLocationListener = new LocationListener() {
    public void onLocationChanged(Location _location) {
        String msg;
        msg = String.format("Latitude: %s \nLongitude: %s\nAltitude: %s\nAccuracy: %s m", _location.getLatitude(), 
        _location.getLongitude(), _location.getAltitude(), _location.getAccuracy());
        txtinfo.setText(msg);
        location = _location;
        saveData = true;
    }

    public void onStatusChanged(String provider, int status, Bundle extras)
    {
        String msg;
        msg = String.format("provider %s status %d Extras %s", provider, status, extras);
        Toast notify = Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG);
        notify.setGravity(Gravity.TOP, 0, 0);
        notify.show();
    }

    public void onProviderEnabled(String provider)
    {
        String msg;
        msg = String.format("provider %s ENABLED", provider);
        Toast notify = Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG);
        notify.setGravity(Gravity.TOP, 0, 0);
        notify.show();
    }

    public void onProviderDisabled(String provider)
    {
        String msg;
        msg = String.format("provider %s DISABLED", provider);
        Toast notify = Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG);
        notify.setGravity(Gravity.TOP, 0, 0);
        notify.show();
    }
};

public String connect(String url)
{
    String result = null;

    try {
        HttpClient httpclient = new DefaultHttpClient();

        // Prepare a request object
        HttpGet httpget = new HttpGet(url); 

        // Execute the request
        HttpResponse response;


        response = httpclient.execute(httpget);

        // Get hold of the response entity
        HttpEntity entity = response.getEntity();
        // If the response does not enclose an entity, there is no need
        // to worry about connection release

        alert(String.format("entity for outside... %s", entity));


        if (entity != null) {
            alert(String.format("Entity too dey fine fine.....", entity));
            InputStream instream = entity.getContent();
            result= convertStreamToString(instream);
            // now you have the string representation of the HTML request
            instream.close();
        } else {
            alert(String.format("i no dey be: %s", entity));
            }
    } catch (Exception e) {
        //errmsg = e.getMessage();
        alert(e.getMessage());
    }
    alert(result);
    return result;
}

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    txtinfo = (TextView)findViewById(R.id.txtvLatlon);
    bizname = (EditText)findViewById(R.id.txtBizname);
    bizaddr = (EditText)findViewById(R.id.txtAddress);
    bizphone = (EditText)findViewById(R.id.txtPhone);
    bizemail = (EditText)findViewById(R.id.txtEmail);
    bizwebsite = (EditText)findViewById(R.id.txtWebsite);
    bizarea = (EditText)findViewById(R.id.txtArea);
    bizdescription = (EditText)findViewById(R.id.txtDescription);
    btnsave = (Button)findViewById(R.id.btnSave);
    btnsave.setOnClickListener(new OnClickListener() {
            public void onClick(View v)
            {
                String ret;
                String req;

                req = String.format("bizname=%s&address=%s&phone=%s&email=%s&website=%s&area=%s&description=%s&latitude=%s&longitude=%s&accuracy=%s",
                           convertURL(bizname.getText().toString()), convertURL(bizaddr.getText().toString()), bizphone.getText(), bizemail.getText(), bizwebsite.getText(),
                           convertURL(bizarea.getText().toString()), convertURL(bizdescription.getText().toString()),
                           location.getLatitude(), location.getLongitude(), location.getAccuracy());

                req = String.format("%s?%s", MOTHERSHIP, req);
                alert(String.format("2 request is::::: ", req));
                try {
                    ret = connect(req);
                    if (ret != null) {
                        alert(ret);
                    } else {
                        alert(String.format("Error connecting to server: %s", errmsg));
                        alert(ret);
                    }
                } catch(Exception e) {
                    alert(e.getMessage());
                }
            }
        });

    LocationManager locationManager = (LocationManager)getSystemService(LOCATION_SERVICE);

    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, myLocationListener);
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, myLocationListener);
    locationManager.requestLocationUpdates(LocationManager.PASSIVE_PROVIDER, 0, 0, myLocationListener);
}



/**
 * Convert inputStream
 * 
 * @param is
 * @return String
 */
private String convertStreamToString(InputStream is)
{
    /*
     * To convert the InputStream to String we use the BufferedReader.readLine()
     * method. We iterate until the BufferedReader return null which means
     * there's no more data to read. Each line will appended to a StringBuilder
     * and returned as String.
     */
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    StringBuilder sb = new StringBuilder();

    String line = null;
    try {
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            is.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return sb.toString();
}

public String convertURL(String str) { 
String url = null; 
try{ 
url = new String(str.trim().replace(" ", "%20").replace("&", "%26") .replace(",", "%2c").replace("(", "%28").replace(")", "%29") .replace("!", "%21").replace("=", "%3D").replace("<", "%3C") .replace(">", "%3E").replace("#", "%23").replace("$", "%24") .replace("'", "%27").replace("*", "%2A").replace("-", "%2D") .replace(".", "%2E").replace("/", "%2F").replace(":", "%3A") .replace(";", "%3B").replace("?", "%3F").replace("@", "%40") .replace("[", "%5B").replace("\\", "%5C").replace("]", "%5D") .replace("_", "%5F").replace("`", "%60").replace("{", "%7B") .replace("|", "%7C").replace("}", "%7D")); }catch(Exception e){ e.printStackTrace(); } return url; }

private void alert(String msg)
{
    Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show();
}

}

Answer 1

我不是Java或Android方面的专家，所以请多多包涵...

 static final String MOTHERSHIP = "[MyServerAddress/server.php";

不知道这只是一个错字还是什么...但是您要在此前面加上[，并且这不应该是提交给HttPClient的绝对http://路径吗？

另外，您还必须在清单文件中添加权限...

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

另外...在您的connect()方法中...

您正在设定

String result = null;

然后在底部调用它...

 alert(result);
return result;

但是我在代码中什么地方都看不到您在使用它，所以它不会总是null吗？？？