更新数据库时没有错误或响应

Question

我试图从我的应用程序连接到我的数据库上的连接Mysql。但我看不到任何Toast响应或结果来自应用程序。除了没有更新已经完成，我的数据库感谢

这是mainActivity.java

public class MainActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

    } 


public void userReg(View view){ 

    startActivity(new Intent(this,Register.class)); 

} 

} 

Background.java

public class Background extends AsyncTask<String,Void,String> { 
    Context ctx; 
    Background(Context ctx){ 
     this.ctx = ctx; 

    } 

    @Override 
    protected String doInBackground(String... params) { 
     String reg_url = "http://10.0.2.2/AndroidDB/register.php"; 
     String log_url = "http://10.0.2.2/AndroidDB/login.php"; 
     String method = params[0]; 
     if(method.equals("register")) { 

      String name = params[1]; 
      String username = params[2]; 
      String password = params[3]; 
      try { 
       URL url = new URL(reg_url); 
       HttpURLConnection httpURLConnection=(HttpURLConnection)url.openConnection(); 
       httpURLConnection.setRequestMethod("POST"); 
       httpURLConnection.setDoOutput(true); 
       OutputStream OS = httpURLConnection.getOutputStream(); 
       BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(OS,"UTF-8")); 
       String data = URLEncoder.encode("name","UTF-8") +"="+URLEncoder.encode(name,"UTF-8")+"&"+ 
          URLEncoder.encode("username","UTF-8") +"="+URLEncoder.encode(username,"UTF-8")+"&"+ 
          URLEncoder.encode("password","UTF-8") +"="+URLEncoder.encode(password,"UTF-8"); 
       bufferedWriter.write(data); 
       bufferedWriter.flush(); 
       bufferedWriter.close(); 
       OS.close(); 
       InputStream IS = httpURLConnection.getInputStream(); 
       IS.close(); 
       return "Registration Success...."; 


      } catch (MalformedURLException e) { 
       e.printStackTrace(); 
      } catch (ProtocolException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 


     } 
     return null; 
    } 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
    } 

    @Override 
    protected void onProgressUpdate(Void... values) { 
     super.onProgressUpdate(values); 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     Toast.makeText(ctx,result,Toast.LENGTH_LONG).show(); 

    } 
} 

这是Register.java

public class Register extends AppCompatActivity { 
EditText et_Name, et_UserName, et_Userpass; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_register); 
     et_Name =(EditText)findViewById(R.id.name); 
     et_UserName =(EditText)findViewById(R.id.userName); 
     et_Userpass =(EditText)findViewById(R.id.userPass); 


    } 


    public void userReg (View view) { 
     String name = et_Name.getText().toString(); 
     String username = et_UserName.getText().toString(); 
     String password = et_Userpass.getText().toString(); 
     String method = "register"; 
     Background background= new Background(this); 
     background.execute(method,name,username,password); 
     finish(); 

    } 
} 

我看不到错误，但我看不到结果，请帮助。

Answer 1

拷贝类：

public class HttpClient { 

private static JSONObject response = null; 

public static JSONObject SendHttpGET(String url) { 
    response = null; 
    try { 
     URL obj = new URL(url); 
     HttpURLConnection con = (HttpURLConnection) obj.openConnection(); 
     con.setRequestMethod("GET"); 
     con.setRequestProperty("Accept", "application/json"); 
     con.setRequestProperty("Content-type", "application/json"); 
     BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream())); 
     String inputLine; 
     StringBuffer sb = new StringBuffer(); 
     while ((inputLine = in.readLine()) != null) { 
      sb.append(inputLine); 
     } 
     in.close(); 
     response = new JSONObject(sb.toString()); 
    } catch (Exception e) { 
     e.printStackTrace(); 
     // Crashlytics.logException(e); 
    } 
    return response; 
} 

public static JSONObject SendHttpPost(String URL, List<NameValuePair> param) { 
    System.out.println("!!-- req=>" +URL + " - " + param.toString()); 
    try { 
     HttpParams params = new BasicHttpParams(); 
     HttpConnectionParams.setConnectionTimeout(params, 15000); 
     HttpConnectionParams.setSoTimeout(params, 10000); 
     DefaultHttpClient httpclient = new DefaultHttpClient(params); 

     HttpPost httpPostRequest = new HttpPost(URL); 
     httpPostRequest.setEntity(new UrlEncodedFormEntity(param)); 
     /* StringEntity se; 
     se = new StringEntity(param.toString()); 
     httpPostRequest.setEntity(se);*/ 
     //httpPostRequest.setHeader("Accept", "application/json"); 
     //httpPostRequest.setHeader("Content-type", "application/json"); 
     httpPostRequest.setHeader("Accept-Encoding", "gzip"); 

     HttpResponse response = (HttpResponse) httpclient.execute(httpPostRequest); 
     HttpEntity entity = response.getEntity(); 

     if (entity != null) { 
      InputStream instream = entity.getContent(); 
      Header contentEncoding = response.getFirstHeader("Content-Encoding"); 
      if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) { 
       instream = new GZIPInputStream(instream); 
      } 

      String resultString = convertStreamToString(instream); 
      instream.close(); 
      resultString = resultString.substring(0, resultString.length() - 1); 
      System.out.println("!!-- res11=>" + resultString.toString()); 
      JSONObject jsonObjRecv = new JSONObject(resultString); 
      System.out.println("!!-- res=>" + jsonObjRecv.toString()); 
      return jsonObjRecv; 
     } 
    } catch (Exception e) { 
     e.printStackTrace(); 

    } 
    return null; 
} 

private static String convertStreamToString(InputStream is) { 
    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(); 
} 

}

那么你活动中添加以下的AsyncTask类（内部类）

public class RegisterAsynctask extends AsyncTask<String,Void,JSONObject> { 

     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 
      baseActivity.showProgressDialog(); 
      name = et_Name.getText().toString(); 
      username = et_UserName.getText().toString(); 
      password = et_Userpass.getText().toString(); 
      method = "register"; 
     } 

     @Override 
     protected JSONObject doInBackground(String... params) { 
      try { 

       List<NameValuePair> req_params = new ArrayList<NameValuePair>(); 
       req_params.add(new BasicNameValuePair("name", name)); 
       req_params.add(new BasicNameValuePair("username", username)); 
       req_params.add(new BasicNameValuePair("password", ""+password)); 
       req_params.add(new BasicNameValuePair("method", method)); 
       JSONObject response = HttpClient.SendHttpPost(your_url, req_params); 
       if (response != null) { 

        return response; 
       } 
      }catch(Exception e){ 
       e.printStackTrace(); 
      } 
      return null; 
     } 

     @Override 
     protected void onPostExecute(JSONObject res) { 
      super.onPostExecute(res); 
      baseActivity.dismissProgressDialog(); 
      Toast.makeText(getApplicationContext(), res.toString(), Toast.LENGTH_LONG).show(); 
     } 
    } 

现在从您的调用此userReg（）方法：

new RegisterAsynctask().execute();