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activity_main

MainActivity

import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity {    private Context mContext;    private EditText mUsernameEditText;    private EditText mPasswordEditText;    private Button mLoginButton;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        init();    }    private void init(){        mContext=this;        mLoginButton=(Button) findViewById(R.id.mLoginButton);        mUsernameEditText = (EditText) findViewById(R.id.usernameEditText);        mPasswordEditText = (EditText) findViewById(R.id.passwordEditText);        mLoginButton.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                String username=mUsernameEditText.getText().toString();                String password=mPasswordEditText.getText().toString();                String message=username+"="+password;                Toast.makeText(mContext,message, Toast.LENGTH_SHORT).show();            }        });    }}

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