♻️ refactor UI emulator

Author: underwindfall

app/src/main/java/com/qifan/nfcbank/CardEmulatorActivity.java

@@ -0,0 +1,94 @@
+package com.qifan.nfcbank
+
+import android.content.Intent
+import android.nfc.NfcAdapter
+import android.os.Build
+import android.os.Build.VERSION_CODES.JELLY_BEAN
+import android.os.Bundle
+import android.support.v7.app.AlertDialog
+import android.support.v7.app.AppCompatActivity
+import android.text.TextUtils
+import android.view.View
+import android.widget.Button
+import android.widget.EditText
+import android.widget.TextView
+import android.widget.Toast
+import com.qifan.nfcbank.cardEmulation.KHostApduService
+
+/**
+ * Created by Qifan on 28/11/2018.
+ */
+class CardEmulatorActivity : AppCompatActivity() {
+    private var mNfcAdapter: NfcAdapter? = null
+    private lateinit var button: Button
+    private lateinit var editText: EditText
+    private lateinit var textView: TextView
+    private lateinit var mTurnNfcDialog: AlertDialog
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.card_emulator)
+
+        mNfcAdapter = NfcAdapter.getDefaultAdapter(this)
+        button = findViewById<View>(R.id.button) as Button
+        editText = findViewById<View>(R.id.editText) as EditText
+        textView = findViewById<View>(R.id.textView) as TextView
+        if (checkNFCEnable()) {
+            textView.visibility = View.GONE
+            editText.visibility = View.VISIBLE
+            button.visibility = View.VISIBLE
+            initService()
+        } else {
+            textView.visibility = View.VISIBLE
+            editText.visibility = View.GONE
+            button.visibility = View.GONE
+            showTurnOnNfcDialog()
+
+        }
+
+
+    }
+
+    private fun initService() {
+        button.setOnClickListener {
+            if (TextUtils.isEmpty(editText.text)) {
+                Toast.makeText(this@CardEmulatorActivity, getString(R.string.toast_msg), Toast.LENGTH_LONG).show()
+            } else {
+                val intent = Intent(this@CardEmulatorActivity, KHostApduService::class.java)
+                intent.putExtra("ndefMessage", editText.text.toString())
+                startService(intent)
+            }
+        }
+
+    }
+
+    private fun checkNFCEnable(): Boolean {
+        return if (mNfcAdapter == null) {
+            textView.text = getString(R.string.tv_noNfc)
+            false
+        } else {
+            mNfcAdapter!!.isEnabled
+        }
+    }
+
+    private fun showTurnOnNfcDialog() {
+        mTurnNfcDialog = AlertDialog.Builder(this)
+            .setTitle(getString(R.string.ad_nfcTurnOn_title))
+            .setMessage(getString(R.string.ad_nfcTurnOn_message))
+            .setPositiveButton(
+                getString(R.string.ad_nfcTurnOn_pos)
+            ) { _, _ ->
+                if (Build.VERSION.SDK_INT >= JELLY_BEAN) {
+                    startActivity(Intent(android.provider.Settings.ACTION_NFC_SETTINGS))
+                } else {
+                    startActivity(Intent(android.provider.Settings.ACTION_NFC_SETTINGS))
+                }
+            }.setNegativeButton(getString(R.string.ad_nfcTurnOn_neg)) { _, _ ->
+                onBackPressed()
+            }
+            .create()
+        mTurnNfcDialog.show()
+    }
+
+
+}