android problem z metoda dot button'a

0

Czesc,
mam problem z apka logujaca ktora ma sie laczyc poprzez skrypt php na serwerze z baza danych. W logcat'cie pokazuje blad metody onlogin zwiazanej z przyciskiem, aczkolwiek nie wiem co dokladnie jest nie tak. Bylbym wdzieczny za pomoc.

main

package com.example.ad.mysqldemo;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
    EditText loginEt, passwordEt;


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

        EditText loginEt= (EditText) findViewById(R.id.etLogin);
        EditText passwordEt= (EditText) findViewById(R.id.etPassword);
    }
    public void OnLogin(View view)
    {
        String login= loginEt.getText().toString();
        String password=passwordEt.getText().toString();
        String type = "login";

        BackgroundWorker backgroundWorker=new BackgroundWorker(this );
        backgroundWorker.execute(type,login, password);
    }
}

BackgroundWorker

package com.example.ad.mysqldemo;

import android.app.AlertDialog;
import android.content.Context;
import android.os.AsyncTask;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;

/**
 * Created by ad on 2017-12-21.
 */

public class BackgroundWorker extends AsyncTask<String,Void,String> {
    Context context;
    AlertDialog alertDialog;
    BackgroundWorker(Context ctx)
    {
        context=ctx;
    }

    @Override
    protected String doInBackground(String... params) {
        String type = params[0];

        String login_url="https://adrian.kubahaha.tk//login.php";
        if(type.equals("login"))
        {
            try {
                String login = params[1];
                String password = params[2];
                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 post_data = URLEncoder.encode("login","UTF-8")+"="+URLEncoder.encode(login,"UTF-8")+"&"
                        +URLEncoder.encode("password","UTF-8")+"="+URLEncoder.encode(password,"UTF-8");
                bufferedWriter.write(post_data);
                bufferedWriter.flush();
                bufferedWriter.close();
                outputStream.close();
                InputStream inputStream = httpURLConnection.getInputStream();
                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1"));
                String result="";
                String line;
                while((line = bufferedReader.readLine())!= null) {
                    result += line;
                }
                bufferedReader.close();
                inputStream.close();
                httpURLConnection.disconnect();
                return result;
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    @Override
    protected void onPreExecute() {
        alertDialog = new AlertDialog.Builder(context).create();
        alertDialog.setTitle("Login Status");
    }

    @Override
    protected void onPostExecute(String result) {
        alertDialog.setMessage(result);
        alertDialog.show();
    }

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


}

activity main

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.ad.mysqldemo.MainActivity">

    <EditText
        android:id="@+id/etLogin"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="14dp"
        android:ems="10"
        android:hint="login"
        android:inputType="textPersonName" />

    <EditText
        android:id="@+id/etPassword"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignEnd="@+id/etLogin"
        android:layout_alignRight="@+id/etLogin"
        android:layout_below="@+id/etLogin"
        android:layout_marginTop="17dp"
        android:ems="10"
        android:hint="password"
        android:inputType="textPassword" />

    <Button
        android:id="@+id/btnLogin"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/etPassword"
        android:layout_marginLeft="53dp"
        android:layout_marginStart="53dp"
        android:layout_marginTop="41dp"
        android:text="Login"
        android:onClick="OnLogin"/>
</RelativeLayout>

manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.ad.mysqldemo">
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>"
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

logcat

12-23 23:44:52.917 2156-2156/? E/SamsungIME: SwiftKey guide popup condition 2 : false false false true true true true true true true
12-23 23:44:53.167 963-4470/? E/ActivityManager: checkUser: useridlist=null, currentuser=0
12-23 23:44:53.167 963-4470/? E/ActivityManager: checkUser: useridlist=null, currentuser=0
12-23 23:44:53.167 963-4470/? E/ActivityManager: checkUser: useridlist=null, currentuser=0
12-23 23:44:53.167 963-4470/? E/ActivityManager: checkUser: useridlist=null, currentuser=0
12-23 23:44:53.177 23485-23485/? E/Zygote: v2
12-23 23:44:53.187 23485-23485/? E/SELinux: [DEBUG] get_category: variable seinfo: untrusted sensitivity: NULL, cateogry: NULL
12-23 23:44:53.797 21309-6347/? E/NetworkScheduler: Unrecognised action provided: android.intent.action.PACKAGE_REPLACED
12-23 23:44:54.977 2156-2156/? E/SamsungIME: SwiftKey guide popup condition 2 : false false false true true true true true true true
12-23 23:44:55.157 269-269/? E/SMD: DCD OFF
12-23 23:44:56.027 23082-23082/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                   Process: com.example.ad.mysqldemo, PID: 23082
                                                   java.lang.IllegalStateException: Could not execute method for android:onClick
                                                       at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
                                                       at android.view.View.performClick(View.java:4808)
                                                       at android.view.View$PerformClick.run(View.java:19918)
                                                       at android.os.Handler.handleCallback(Handler.java:739)
                                                       at android.os.Handler.dispatchMessage(Handler.java:95)
                                                       at android.os.Looper.loop(Looper.java:135)
                                                       at android.app.ActivityThread.main(ActivityThread.java:5608)
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at java.lang.reflect.Method.invoke(Method.java:372)
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1397)
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1192)
                                                    Caused by: java.lang.reflect.InvocationTargetException
                                                       at java.lang.reflect.Method.invoke(Native Method)
                                                       at java.lang.reflect.Method.invoke(Method.java:372)
                                                       at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
                                                       at android.view.View.performClick(View.java:4808) 
                                                       at android.view.View$PerformClick.run(View.java:19918) 
                                                       at android.os.Handler.handleCallback(Handler.java:739) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:95) 
                                                       at android.os.Looper.loop(Looper.java:135) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:5608) 
                                                       at java.lang.reflect.Method.invoke(Native Method) 
                                                       at java.lang.reflect.Method.invoke(Method.java:372) 
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1397) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1192) 
                                                    Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference
                                                       at com.example.ad.mysqldemo.MainActivity.OnLogin(MainActivity.java:22)
                                                       at java.lang.reflect.Method.invoke(Native Method) 
                                                       at java.lang.reflect.Method.invoke(Method.java:372) 
                                                       at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
                                                       at android.view.View.performClick(View.java:4808) 
                                                       at android.view.View$PerformClick.run(View.java:19918) 
                                                       at android.os.Handler.handleCallback(Handler.java:739) 
                                                       at android.os.Handler.dispatchMessage(Handler.java:95) 
                                                       at android.os.Looper.loop(Looper.java:135) 
                                                       at android.app.ActivityThread.main(ActivityThread.java:5608) 
                                                       at java.lang.reflect.Method.invoke(Native Method) 
                                                       at java.lang.reflect.Method.invoke(Method.java:372) 
                                                       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1397) 
                                                       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1192) 
12-23 23:44:56.097 963-23540/? E/android.os.Debug: ro.product_ship = true
12-23 23:44:56.097 963-23540/? E/android.os.Debug: ro.debug_level = 0x4f4c
12-23 23:44:56.237 13136-23541/? E/SQLiteLog: (284) automatic index on crash_info_summary(package_name_touched)
12-23 23:44:56.637 963-1410/? E/ActivityManager: checkUser: useridlist=null, currentuser=0
12-23 23:44:56.637 963-1410/? E/ActivityManager: checkUser: useridlist=null, currentuser=0
12-23 23:44:56.637 963-1410/? E/ActivityManager: checkUser: useridlist=null, currentuser=0
12-23 23:44:56.637 963-1410/? E/ActivityManager: checkUser: useridlist=null, currentuser=0
12-23 23:44:56.657 23543-23543/? E/Zygote: v2
12-23 23:44:56.667 23543-23543/? E/SELinux: [DEBUG] get_category: variable seinfo: release sensitivity: NULL, cateogry: NULL
12-23 23:44:57.037 23543-23543/? E/ActivityThread: Failed to find provider info for com.samsung.android.coreapps.easysignup.public
12-23 23:44:57.037 23543-23543/? E/ActivityThread: Failed to find provider info for com.samsung.android.coreapps.easysignup.public

0

EditTexty zadeklarowałeś wcześniej, wystarczy drobna zmiana w onCreate

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

        loginEt= (EditText) findViewById(R.id.etLogin);
        passwordEt= (EditText) findViewById(R.id.etPassword);
    }

0

Wielkie dzieki! dziala :D

android problem z metoda dot button'a

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