Back to project page robobook.
The source code is released under:
MIT License
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package com.krazyrobot.robobook.activity; /*from ww w . j ava 2 s. c o m*/ import android.content.Intent; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.text.Editable; import android.text.TextUtils; import android.text.TextWatcher; import android.view.View; import android.widget.Button; import android.widget.EditText; import com.krazyrobot.robobook.R; public class LoginActivity extends ActionBarActivity { private EditText mEmailEditText; private Button mLoginButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_login); mLoginButton = (Button)findViewById(R.id.login_button); mLoginButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startActivity(new Intent(LoginActivity.this, FollowRobotsActivity.class)); } }); mEmailEditText = (EditText)findViewById(R.id.email_edittext); mEmailEditText.addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) { } @Override public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) { } @Override public void afterTextChanged(Editable editable) { if (TextUtils.isEmpty(editable.toString())) { mLoginButton.setEnabled(false); } else { mLoginButton.setEnabled(true); } } }); } }