Implement Login screen

2 files changed, 64 insertions, 0 deletions

diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/LoginFragment.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/LoginFragment.kt
new file mode 100644
index 0000000000..12404d3e78
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/LoginFragment.kt
@@ -0,0 +1,53 @@
+package net.mullvad.mullvadvpn
+
+import android.os.Bundle
+import android.support.v4.app.Fragment
+import android.text.Editable
+import android.text.TextWatcher
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.EditText
+import android.widget.ImageButton
+
+const val MIN_ACCOUNT_TOKEN_LENGTH = 10
+
+class LoginFragment : Fragment() {
+    private lateinit var loginButton: ImageButton
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        val view = inflater.inflate(R.layout.login, container, false)
+        val accountInput: EditText = view.findViewById(R.id.account_input)
+
+        loginButton = view.findViewById(R.id.login_button)
+
+        accountInput.addTextChangedListener(AccountInputWatcher())
+        setLoginButtonEnabled(false)
+
+        return view
+    }
+
+    private fun setLoginButtonEnabled(enabled: Boolean) {
+        loginButton.apply {
+            if (enabled != isEnabled()) {
+                setEnabled(enabled)
+                setClickable(enabled)
+                setFocusable(enabled)
+            }
+        }
+    }
+
+    inner class AccountInputWatcher : TextWatcher {
+        override fun beforeTextChanged(text: CharSequence, start: Int, count: Int, after: Int) {}
+
+        override fun onTextChanged(text: CharSequence, start: Int, before: Int, count: Int) {}
+
+        override fun afterTextChanged(text: Editable) {
+            setLoginButtonEnabled(text.length >= MIN_ACCOUNT_TOKEN_LENGTH)
+        }
+    }
+}
diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/MainActivity.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/MainActivity.kt
index b05f4df3b1..b5fc9c3306 100644
--- a/android/src/main/kotlin/net/mullvad/mullvadvpn/MainActivity.kt
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/MainActivity.kt
@@ -7,5 +7,16 @@ class MainActivity : FragmentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.main)
+
+        if (savedInstanceState == null) {
+            addInitialFragment()
+        }
+    }
+
+    private fun addInitialFragment() {
+        supportFragmentManager?.beginTransaction()?.apply {
+            add(R.id.main_fragment, LoginFragment())
+            commit()
+        }
     }
 }