ሀገር በቀል እውቀት ይለምልም

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+	useLibrary 'org.apache.http.legacy'
+	compileSdkVersion 28
+
+	defaultConfig {
+		applicationId "com.mychapa.pay"
+		minSdkVersion 21
+		targetSdkVersion 28
+		versionCode 1
+		versionName "1.0"
+	}
+	buildTypes {
+		release {
+			minifyEnabled false
+			proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+		}
+	}
+}
+
+dependencies {
+	compile fileTree(dir: 'libs', include: ['*.jar'])
+	implementation 'androidx.appcompat:appcompat:1.1.0'
+	implementation 'com.google.android.material:material:1.0.0'
+	implementation 'com.google.firebase:firebase-database:19.0.0'
+	implementation 'com.github.bumptech.glide:glide:3.7.0'
+	implementation 'com.google.code.gson:gson:2.8.0'
+	implementation 'com.squareup.okhttp3:okhttp:3.9.1'
+}

app/src/main/AndroidManifest.xml

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+
+<manifest
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	package="com.mychapa.pay">
+	<uses-permission	android:name="android.permission.INTERNET"/>
+	<uses-permission	android:name="android.permission.ACCESS_NETWORK_STATE"/>
+	<application
+		android:allowBackup="true"
+		android:label="my chapa"
+		android:icon="@drawable/app_icon"
+		android:largeHeap="true"
+		android:usesCleartextTraffic="true"
+		android:theme="@style/AppTheme">
+		<activity
+			android:name=".MainActivity"
+android:exported="true"
+			android:configChanges="orientation|screenSize|keyboardHidden|smallestScreenSize|screenLayout"
+			android:hardwareAccelerated="true"
+			android:supportsPictureInPicture="true"
+			android:screenOrientation="portrait">
+			<intent-filter>
+				<action	android:name="android.intent.action.MAIN"/>
+				<category	android:name="android.intent.category.LAUNCHER"/>
+			</intent-filter>
+		</activity>
+		<meta-data
+			android:name="com.google.android.gms.version"
+			android:value="@integer/google_play_services_version"/>
+		<provider
+			android:name="com.google.firebase.provider.FirebaseInitProvider"
+			android:authorities="com.mychapa.pay.firebaseinitprovider"
+			android:exported="false"
+			android:initOrder="100"/>
+		<service
+			android:name="com.google.firebase.components.ComponentDiscoveryService"
+			android:exported="false">
+			<meta-data
+				android:name="com.google.firebase.components:com.google.firebase.database.DatabaseRegistrar"
+				android:value="com.google.firebase.components.ComponentRegistrar"/>
+		</service>
+		<uses-library
+			android:name="org.apache.http.legacy"
+			android:required="false"/>
+	</application>
+</manifest>

app/src/main/java/com/my/newproject23/BluetoothConnect.java

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+package com.my.newproject23;
+
+import android.app.Activity;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.content.Intent;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Set;
+import java.util.UUID;
+
+public class BluetoothConnect {
+private static final String DEFAULT_UUID = "00001101-0000-1000-8000-00805F9B34FB";
+
+private Activity activity;
+
+private BluetoothAdapter bluetoothAdapter;
+
+public BluetoothConnect(Activity activity) {
+this.activity = activity;
+this.bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+}
+
+public boolean isBluetoothEnabled() {
+if(bluetoothAdapter != null) return true;
+
+return false;
+}
+
+public boolean isBluetoothActivated() {
+if(bluetoothAdapter == null) return false;
+
+return bluetoothAdapter.isEnabled();
+}
+
+public void activateBluetooth() {
+Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
+activity.startActivity(intent);
+}
+
+public String getRandomUUID() {
+return String.valueOf(UUID.randomUUID());
+}
+
+public void getPairedDevices(ArrayList<HashMap<String, Object>> results) {
+Set<BluetoothDevice> pairedDevices = bluetoothAdapter.getBondedDevices();
+
+if(pairedDevices.size() > 0) {
+for(BluetoothDevice device : pairedDevices) {
+HashMap<String, Object> result = new HashMap<>();
+result.put("name", device.getName());
+result.put("address", device.getAddress());
+
+results.add(result);
+}
+}
+}
+
+public void readyConnection(BluetoothConnectionListener listener, String tag) {
+if(BluetoothController.getInstance().getState().equals(BluetoothController.STATE_NONE)) {
+BluetoothController.getInstance().start(this, listener, tag, UUID.fromString(DEFAULT_UUID), bluetoothAdapter);
+}
+}
+
+public void readyConnection(BluetoothConnectionListener listener, String uuid, String tag) {
+if(BluetoothController.getInstance().getState().equals(BluetoothController.STATE_NONE)) {
+BluetoothController.getInstance().start(this, listener, tag, UUID.fromString(uuid), bluetoothAdapter);
+}
+}
+
+
+public void startConnection(BluetoothConnectionListener listener, String address, String tag) {
+BluetoothDevice device = bluetoothAdapter.getRemoteDevice(address);
+
+BluetoothController.getInstance().connect(device, this, listener, tag, UUID.fromString(DEFAULT_UUID), bluetoothAdapter);
+}
+
+public void startConnection(BluetoothConnectionListener listener, String uuid, String address, String tag) {
+BluetoothDevice device = bluetoothAdapter.getRemoteDevice(address);
+
+BluetoothController.getInstance().connect(device, this, listener, tag, UUID.fromString(uuid), bluetoothAdapter);
+}
+
+public void stopConnection(BluetoothConnectionListener listener, String tag) {
+BluetoothController.getInstance().stop(this, listener, tag);
+}
+
+public void sendData(BluetoothConnectionListener listener, String data, String tag) {
+String state = BluetoothController.getInstance().getState();
+
+if(!state.equals(BluetoothController.STATE_CONNECTED)) {
+listener.onConnectionError(tag, state, "Bluetooth is not connected yet");
+return;
+}
+
+BluetoothController.getInstance().write(data.getBytes());
+}
+
+public Activity getActivity() {
+return activity;
+}
+
+public interface BluetoothConnectionListener {
+void onConnected(String tag, HashMap<String, Object> deviceData);
+void onDataReceived(String tag, byte[] data, int bytes);
+void onDataSent(String tag, byte[] data);
+void onConnectionError(String tag, String connectionState, String message);
+void onConnectionStopped(String tag);
+}
+}