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yemreak authored and gitbook-bot committed Jan 12, 2020
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257 changes: 250 additions & 7 deletions haberlesme/wifi.md
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Expand Up @@ -4,7 +4,7 @@ description: Destekleyen cihazlar için android WiFi P2P bağlantısı

# 📶 WiFi P2P

## 📻 WiFi için Broadcast Receiver Tanımlama
## 🧱 Temel WiFi İşlemleri

### 💎 WiFi Durumları

Expand All @@ -19,10 +19,76 @@ description: Destekleyen cihazlar için android WiFi P2P bağlantısı

Broadcast Receiver ile WiFi durumlarını kontrol edebiliriz

{% code title="WifiActivity.java" %}
{% tabs %}
{% tab title="Kotlin" %}
```kotlin
class WifiDirectActivity : AppCompatActivity() {

companion object {
val TAG = WifiDirectActivity::javaClass.name
}

/**
* Konum izni isteme kodu
*/
private val PRC_ACCESS_FINE_LOCATION = 1

/**
* Wifi alıcısı için filtreleme
*/
private val wifiFilter = IntentFilter().apply {
addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION)
addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION)
addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION)
addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION)
}

/**
* WiFi değişikliklerinde reciever'ı çalıştırma
*/
private val manager: WifiP2pManager? by lazy(LazyThreadSafetyMode.NONE) {
getSystemService(Context.WIFI_P2P_SERVICE) as WifiP2pManager?
}

/**
* Wi-Fi P2P Frameworkü ile uygulamamıza bağlanmayı sağlayacak obje
*/
private var channel: WifiP2pManager.Channel? = null

/**
* Wifi alıcısı
*/
private var wifiReceiver: BroadcastReceiver? = null

override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_wi_fi_direct)

initDependencies()
}

private fun initDependencies(): Unit {
channel = manager?.initialize(this, mainLooper, null)
channel?.also { channel ->
wifiReceiver = WifiDirectBroadcastReceiver(manager, channel, this)
}

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
getPermissions(Manifest.permission.ACCESS_FINE_LOCATION)
}
}
// ...
}
```
{% endtab %}

{% tab title="Java" %}
```java
public class WiFiDirectActivity extends AppCompatActivity {

public static final String TAG = WiFiDirectActivity.class.getSimpleName();
private static final int PRC_ACCES_FINE_LOCATION = 1;
private final IntentFilter wifiFilter = new IntentFilter();

WifiP2pManager manager;
Channel channel;
BroadcastReceiver wifiReceiver;
Expand Down Expand Up @@ -59,8 +125,12 @@ Broadcast Receiver ile WiFi durumlarını kontrol edebiliriz
getRequiredPermissions();
}
}

// ...
}
```
{% endcode %}
{% endtab %}
{% endtabs %}

{% page-ref page="broadcast/olusturma.md" %}

Expand Down Expand Up @@ -95,6 +165,42 @@ Aşağıdaki metotlar **Location Mode** iznine de ihtiyaç duyar

### 👨‍💻 Kod Tarafında İzin İsteme

{% tabs %}
{% tab title="Kotlin" %}
```kotlin
@RequiresApi(Build.VERSION_CODES.M)
fun getPermissions(vararg permissions: String): Unit {
permissions.forEach {
if (!hasPermission(it)) {
requestPermissions(arrayOf(it), PRC_ACCESS_FINE_LOCATION)
}
}
}

@RequiresApi(Build.VERSION_CODES.M)
fun hasPermission(permission: String): Boolean {
return checkSelfPermission(permission) == PackageManager.PERMISSION_GRANTED
}

override fun onRequestPermissionsResult(
requestCode: Int,
permissions: Array<out String>,
grantResults: IntArray
) {
when (requestCode) {
PRC_ACCESS_FINE_LOCATION -> {
if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
Log.w(TAG, "onRequestPermissionsResult: Konum izni gereklidir")
Toast.makeText(this, "İzinler gereklidir 😥", Toast.LENGTH_SHORT)
.show()
}
}
}
}
```
{% endtab %}

{% tab title="Java" %}
```java
/**
* Wi-Fi P2P için gerekli izinleri alma
Expand Down Expand Up @@ -122,21 +228,155 @@ public void onRequestPermissionsResult(
) {
if (requestCode == PRC_ACCES_FINE_LOCATION) {
if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {
Log.w(TAG, "onRequestPermissionsResult: Fine location izni gereklidir");
Toast.makeText(this, "İzinler gereklidir 😥", Toast.LENGTH_SHORT).show();
Log.w(TAG, "onRequestPermissionsResult:Fine location izni gereklidir");
Toast.makeText(this, "İzinler gereklidir 😥", Toast.LENGTH_SHORT)
.show();
}
}
}
```
{% endtab %}
{% endtabs %}

{% page-ref page="../temel/izinlerin-yoenetimi.md" %}

## 🎫 Broadcast Alıcısını Kaydetme
## 📻 WiFi için Broadcast Receiver Tanımlama

### 📡 Broadcast Alıcısı Tanımlama

{% tabs %}
{% tab title="Kotlin" %}
```kotlin
open class WifiDirectBroadcastReceiver(
var manager: WifiP2pManager,
var channel: WifiP2pManager.Channel,
var wifiDirectActivity: WifiDirectActivity
) : BroadcastReceiver() {

companion object {
val TAG = WifiDirectActivity::javaClass.name
}

override fun onReceive(context: Context, intent: Intent) {
when (intent.action) {
WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION -> onStateChanged()
WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION -> onPeerChanged()
WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION ->
onConnectionChanged()
WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION ->
onThisDeviceChanged()
}
}

private fun onStateChanged(): Unit {
Log.i(TAG, "onStateChanged: ")
}

private fun onPeerChanged(): Unit {
Log.i(TAG, "onPeerChanged: ")
}

private fun onConnectionChanged(): Unit {
Log.i(TAG, "onConnectionChanged: ")
}

private fun onThisDeviceChanged(): Unit {
Log.i(TAG, "onThisDeviceChanged: ")
}
}
```
{% endtab %}

{% tab title="Java" %}
```java
/**
* Önemli WiFi olaylarını yayınlayan sınıf
* https://developer.android.com/guide/topics/connectivity/wifip2p.html#create-br
*/
public class WiFiDirectBroadcastReciever extends BroadcastReceiver {

public static final String TAG = WiFiDirectBroadcastReciever
.class.getSimpleName();
public static final int reconnect = 1;
private static final String DEVICE_PATTERN = "HUAWEI P20 lite";

WifiP2pManager manager;
Channel channel;
WiFiDirectActivity wifiDirectActivity;

/**
* Eşleşilen cihazların bilgileri
*/
private List<WifiP2pDevice> peers = new ArrayList<>();

public WiFiDirectBroadcastReciever(
WifiP2pManager manager,
Channel channel,
WiFiDirectActivity wifiDirectActivity
) {
super();

this.manager = manager;
this.channel = channel;
this.wifiDirectActivity = wifiDirectActivity;
}


@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();

// TODO
if (action != null) {
switch (action) {
// ...
}
}
}
}
```
{% endtab %}
{% endtabs %}

### 🎫 Broadcast Alıcısını Kaydetme

* ▶️ Uygulama çalıştığında alıcının kayıt edilmesi
* 🧹 Durdurulduğunda kaydın silinmesi gerekir
* 🎳 Kayıt silinmezse gereksiz yere sistemi yorar ve alıcı kayıtları defalarca kaydedilebilir

{% tabs %}
{% tab title="Kotlin" %}
```kotlin
class WifiDirectActivity : AppCompatActivity() {

// ...

private fun registerWifiReceiver(): Unit {
wifiReceiver.also {
registerReceiver(it, wifiFilter)
}
}

private fun unregisterWifiReceiver(): Unit {
wifiReceiver.also {
unregisterReceiver(it)
}
}

override fun onResume() {
super.onResume()
registerWifiReceiver()
}

override fun onPause() {
super.onPause()
unregisterWifiReceiver()
}
}
```
{% endtab %}

{% tab title="Java" %}
```java
@Override
protected void onResume() {
Expand Down Expand Up @@ -168,6 +408,8 @@ private void unregisterWifiFilter() {
}

```
{% endtab %}
{% endtabs %}

{% page-ref page="broadcast/receiver.md" %}

Expand All @@ -186,6 +428,7 @@ private void unregisterWifiFilter() {
## 🔗 Faydalı Bağlantılar

* [📖 WiFi Direct P2P Overview](https://developer.android.com/guide/topics/connectivity/wifip2p.html)
* [📖 Create P2P connections with Wi-Fi Direct](https://developer.android.com/training/connect-devices-wirelessly/wifi-direct#kotlin) \(Eski\)
* [👨‍💻 WiFi Direct Demo](https://android.googlesource.com/platform/development/+/master/samples/WiFiDirectDemo/src/com/example/android/wifidirect?autodive=0%2F)
* [📺 WiFi Direct Tutorial](https://www.youtube.com/watch?v=nw627o-8Fok&list=PLFh8wpMiEi88SIJ-PnJjDxktry4lgBtN3)

4 changes: 1 addition & 3 deletions yazilarim/neden-kotlin.md
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Expand Up @@ -9,13 +9,11 @@
* 🕰️ Java 8 eskidir, java 13 çıkmıştır

{% hint style="success" %}
🚀 Kotlin projesinde de java sınıfları oluşturup, kullanabilirsin
🚀 Kotlin projesinde java sınıfları oluşturabilirsin
{% endhint %}

## 🔗 Faydalı Kaynaklar

{% embed url="https://kotlinlang.org/community/" %}

{% embed url="https://medium.com/@halilozel1903/kotlin-vs-java-719902655eb1" %}

##
Expand Down

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