ボタンをクリックした直後にアプリケーションが終了しました

Question

こんにちは私はどのようにDBに登録情報を入力するかについて取り組んでいます。私は、ログインページの「今すぐ登録」ボタンをクリックすると、アプリがシャットダウンします。私は、この問題のために何をすべきか？

Login.javaコード

public class Login extends Activity { 
    EditText ET_NAME,ET_PASS; 
    String login_name,login_pass; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.login_main); 
     ET_NAME = (EditText)findViewById(R.id.user_name); 
     ET_PASS = (EditText)findViewById(R.id.user_pass); 
    } 
    public void userReg(View view) 
    { 
     startActivity(new Intent(this,Register.class)); 
    } 
    public void userLogin(View view) 
    { 
     login_name = ET_NAME.getText().toString(); 
     login_pass = ET_PASS.getText().toString(); 
     String method = "login"; 
     BackgroundTask backgroundTask = new BackgroundTask(this); 
     backgroundTask.execute(method,login_name,login_pass); 
    } 
} 

Register.java

public class Register extends Activity { 
    EditText ET_NAME,ET_USER_NAME,ET_USER_PASS; 
    String name,user_name,user_pass; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.register_layout); 
     ET_NAME = (EditText)findViewById(R.id.name); 
     ET_USER_NAME= (EditText)findViewById(R.id.new_user_name); 
     ET_USER_PASS = (EditText)findViewById(R.id.new_user_pass); 
    } 
    public void userReg(View view) 
    { 
     name = ET_NAME.getText().toString(); 
     user_name = ET_USER_NAME.getText().toString(); 
     user_pass =ET_USER_PASS.getText().toString(); 
     String method = "register"; 
     BackgroundTask backgroundTask = new BackgroundTask(this); 
     backgroundTask.execute(method,name,user_name,user_pass); 
     finish(); 

    } 

とログ。

No apk changes detected since last installation, skipping installation of C:\Android\1113GMDemo1\app\build\outputs\apk\app-debug.apk 
$ adb shell am force-stop com.example.jina.a1105gmdemo 
$ adb shell am start -n "com.example.jina.a1105gmdemo/com.example.jina.a1105gmdemo.Login" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER -D 
Connecting to com.example.jina.a1105gmdemo 
I/System.out: Sending WAIT chunk 
W/ActivityThread: Application com.example.jina.a1105gmdemo is waiting for the debugger on port 8100... 
I/dalvikvm: Debugger is active 
I/System.out: Debugger has connected 
I/System.out: waiting for debugger to settle... 
Connected to the target VM, address: 'localhost:8600', transport: 'socket' 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: waiting for debugger to settle... 
I/System.out: debugger has settled (1427) 
I/MultiDex: VM with version 1.6.0 does not have multidex support 
I/MultiDex: install 
I/MultiDex: MultiDexExtractor.load(/data/app/com.example.jina.a1105gmdemo-19.apk, false) 
I/MultiDex: loading existing secondary dex files 
I/MultiDex: load found 1 secondary dex files 
I/MultiDex: install done 
I/FirebaseInitProvider: FirebaseApp initialization unsuccessful 
D/dalvikvm: threadid=1: still suspended after undo (sc=1 dc=1) 
Disconnected from the target VM, address: 'localhost:8600', transport: 'socket' 

私は他の点を選んでデバッグするとき、私はこのようなログました。

I/Adreno-EGL: <qeglDrvAPI_eglInitialize:410>: EGL 1.4 QUALCOMM build: () 
       OpenGL ES Shader Compiler Version: E031.24.00.08 
       Build Date: 03/21/14 Fri 
       Local Branch: AU200+patches_03212014 
       Remote Branch: 
       Local Patches: 
       Reconstruct Branch: 
D/OpenGLRenderer: Enabling debug mode 0 
D/OpenGLRenderer: GL error from OpenGLRenderer: 0x502 
E/OpenGLRenderer: GL_INVALID_OPERATION 

+ これは、バックグラウンドコードである

public class BackgroundTask extends AsyncTask<String,Void,String> { 
    AlertDialog alertDialog; 
    Context ctx; 

    BackgroundTask(Context ctx) { 
     this.ctx = ctx; 
    } 

    @Override 
    protected void onPreExecute() { 
    // alertDialog = new AlertDialog.Builder(ctx).create(); 
    // alertDialog.setTitle("Login Information"); 
    // alertDialog.setMessage("Login success"); 
    } 

    @Override 
    protected String doInBackground(String... params) { 
     String reg_url = "http://35.160.135.119/webapp/register.php"; 
     String login_url = "http://35.160.135.119/webapp/login.php"; 
     String method = params[0]; 
     if (method.equals("register")) { 
      String name = params[1]; 
      String user_name = params[2]; 
      String user_pass = params[3]; 
      try { 
       URL url = new URL(reg_url); 
       final String COOKIES_HEADER = "Set-Cookie"; // stackoverflow 

       HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); 

       java.net.CookieManager msCookieManager = new java.net.CookieManager(); 
       Map<String, List<String>> headerFields = httpURLConnection.getHeaderFields(); 
       List<String> cookiesHeader = headerFields.get(COOKIES_HEADER); 

       if (cookiesHeader != null) { 
        for (String cookie : cookiesHeader) { 
         msCookieManager.getCookieStore().add(null, HttpCookie.parse(cookie).get(0)); 
        } 
       } 
       if (msCookieManager.getCookieStore().getCookies().size() > 0) { 
        // While joining the Cookies, use ',' or ';' as needed. Most of the servers are using ';' 
        httpURLConnection.setRequestProperty("Cookie", 
          TextUtils.join(";", msCookieManager.getCookieStore().getCookies())); 
       } 

       httpURLConnection.setRequestMethod("POST"); 
       httpURLConnection.setDoOutput(true); 
       //httpURLConnection.setDoInput(true); 
       OutputStream OS = httpURLConnection.getOutputStream(); 
       BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(OS, "UTF-8")); 
       String data = URLEncoder.encode("user", "UTF-8") + "=" + URLEncoder.encode(name, "UTF-8") + "&" + 
         URLEncoder.encode("user_name", "UTF-8") + "=" + URLEncoder.encode(user_name, "UTF-8") + "&" + 
         URLEncoder.encode("user_pass", "UTF-8") + "=" + URLEncoder.encode(user_pass, "UTF-8"); 


       bufferedWriter.write(data); 
       bufferedWriter.flush(); 
       bufferedWriter.close(); 
       OS.close(); 
       InputStream IS = httpURLConnection.getInputStream(); 
       IS.close(); 
       //httpURLConnection.connect(); 
       httpURLConnection.disconnect(); 
       return "Registration Success..."; 
      } catch (MalformedURLException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } else if (method.equals("login")) { 
      String login_name = params[1]; 
      String login_pass = params[2]; 
      try { 
       URL url = new URL(login_url); 
       HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection(); 
       httpURLConnection.setRequestMethod("POST"); 
       httpURLConnection.setDoOutput(true); 
       httpURLConnection.setDoInput(true); 
       OutputStream outputStream = httpURLConnection.getOutputStream(); 
       BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8")); 
       String data = URLEncoder.encode("login_name", "UTF-8") + "=" + URLEncoder.encode(login_name, "UTF-8") + "&" + 
         URLEncoder.encode("login_pass", "UTF-8") + "=" + URLEncoder.encode(login_pass, "UTF-8"); 
       bufferedWriter.write(data); 
       bufferedWriter.flush(); 
       bufferedWriter.close(); 
       outputStream.close(); 
       InputStream inputStream = httpURLConnection.getInputStream(); 
       BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1")); 
       String response = ""; 
       String line = ""; 
       while ((line = bufferedReader.readLine()) != null) { 
        response += line; 
       } 
       bufferedReader.close(); 
       inputStream.close(); 
       httpURLConnection.disconnect(); 
       return response; 
      } catch (MalformedURLException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 
     return null; 
    } 

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

    @Override 
    protected void onPostExecute(String result) { 
     if (result.equals("Registration Success...")) { 
      Toast.makeText(ctx, result, Toast.LENGTH_LONG).show(); 
     } else { 
      alertDialog.setMessage(result); 
      alertDialog.show(); 
     } 
    } 
} 

Answer 1

（仕上げを削除）この方法でUSERREG（ビュービュー）.Actuallyあなたは（）仕上げを呼び出すことによって、活動を終えています。

public void userReg(View view) 
{ 
    name = ET_NAME.getText().toString(); 
    user_name = ET_USER_NAME.getText().toString(); 
    user_pass =ET_USER_PASS.getText().toString(); 
    String method = "register"; 
    BackgroundTask backgroundTask = new BackgroundTask(this); 
    backgroundTask.execute(method,name,user_name,user_pass); 
    //finish(); remove it 

} 

Answer 2

これが役立つかどうかはわかりません。しかし、onPostExecuteメソッドでNullPointerExceptionが発生する可能性があります。これは、resultがdoInBackgroundによって返され、nullになる可能性があるためです。 equals式を反転して、もう一度お試しください。