android - 连接到网络服务后无法打开图库

Question

我可以连接到网络服务，但我想做的是在连接网络服务后我想打开画廊并从那里选择一个视频。你能帮我看看问题出在哪里吗？ 这是我的代码:

package com.isoft.uploader;

import java.util.ArrayList;

import org.json.JSONArray;
import org.json.JSONObject;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class UploaderActivity extends Activity 
{

//ArrayList<Response> WebData= new ArrayList<Response>();
public static final int SELECT_VIDEO=1;
public static final String TAG="UploadActivity";
String path="";
final String NAMESPACE = "http://tempuri.org/";
final String SERVICEURL = "http://192.168.10.177/androidws/isandroidws.asmx";
final String METHOD_NAME1="OzelVeriAlanlariniGetir";
final String METHOD_NAME="KullaniciGiris";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button enter=(Button)findViewById(R.id.Enter);
    final EditText username=(EditText)findViewById(R.id.username);
    final EditText password=(EditText)findViewById(R.id.password);
    enter.setOnClickListener(new View.OnClickListener() 
    {

        @Override
        public void onClick(View arg0) 
        {
            // TODO Auto-generated method stub
            //request code for Webservice
            SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
            //sending the username to the webservice
            request.addProperty("kullaniciAdi",username.getText().toString());
            //sending the password to the webservice
            request.addProperty("password",password.getText().toString());
            SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
            envelope.dotNet = true;
            //Putting the request in an envelope
            envelope.setOutputSoapObject(request);
            HttpTransportSE transport = new HttpTransportSE(SERVICEURL);
            try
            {
                 transport.call("http://tempuri.org/"+METHOD_NAME, envelope);
                 //getting the response from the webservice
                 Integer response = (Integer) envelope.getResponse();
                 if(response!=0)
                 {
                    openGaleryVideo();
                 }//end of if statement
            }//end of try 
            catch(Exception exception)
            {
                exception.printStackTrace();
            }//end of catch

        }//end of onClick method
    });//end of OnclickListener method
}//end of onCreate method


public void openGaleryVideo()
{
    Intent intent=new Intent();
    intent.setType("video/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent, "Select Video"),SELECT_VIDEO);
}//end of openGaleryVideo method

public String getPath(Uri uri)
{   
    String[] projection = { MediaStore.Video.Media.DATA};
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
}//end of getPath method
}//end of main

Answer 1

也许 Android 类 AsyncTask 会有所帮助。

在 doInBackground 方法上发出 WebService 请求并在 postExecute 方法上显示画廊。

更多信息:AsyncTask on Android doc

更新: 将 onclick 方法内容替换为:

AsyncTask<String, Void, Integer> task = new AsyncTask<String, Void, Integer>(){

    @Override
    protected Integer doInBackground(String... params) {


        // TODO Auto-generated method stub
        //request code for Webservice
        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
        //sending the username to the webservice
        request.addProperty("kullaniciAdi",username.getText().toString());
        //sending the password to the webservice
        request.addProperty("password",password.getText().toString());
        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
        envelope.dotNet = true;
        //Putting the request in an envelope
        envelope.setOutputSoapObject(request);
        HttpTransportSE transport = new HttpTransportSE(SERVICEURL);
        try
        {
             transport.call("http://tempuri.org/"+METHOD_NAME, envelope);
             //getting the response from the webservice
             return (Integer) envelope.getResponse();
        }//end of try 
        catch(Exception exception)
        {
            exception.printStackTrace();
        }//end of catch
        return 0;
    }


    protected void onPostExecute(Integer result) {
        if(result!=0)
        {
           openGaleryVideo();
        }//end of if statement
    };
};