updated for android 26

Android/BlunoBasicDemo/app/build.gradle

@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 21
-    buildToolsVersion "21.1.2"
+    compileSdkVersion 26
+    buildToolsVersion "28.0.3"
 
     defaultConfig {
         applicationId "com.dfrobot.angelo.blunobasicdemo"
-        minSdkVersion 18
-        targetSdkVersion 21
+        minSdkVersion 26
+        targetSdkVersion 26
         versionCode 1
         versionName "1.0"
     }
@@ -22,5 +22,5 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:21.0.3'
+    compile 'com.android.support:appcompat-v7:26.1.0'
 }

Android/BlunoBasicDemo/app/src/main/AndroidManifest.xml

@@ -8,7 +8,8 @@ devices only.  If you want to make your app available to devices that don't supp
 you should omit this in the manifest.  Instead, determine BLE capability by using
 PackageManager.hasSystemFeature(FEATURE_BLUETOOTH_LE) -->
     <uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>
-
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
     <uses-permission android:name="android.permission.BLUETOOTH"/>
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
 

Android/BlunoBasicDemo/app/src/main/java/com/dfrobot/angelo/blunobasicdemo/MainActivity.java

@@ -1,14 +1,20 @@
 package com.dfrobot.angelo.blunobasicdemo;
 
+import android.Manifest;
+import android.app.AlertDialog;
 import android.content.Context;
+import android.content.pm.PackageManager;
 import android.os.Bundle;
 import android.content.Intent;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.content.ContextCompat;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.ScrollView;
 import android.widget.TextView;
+import android.widget.Toast;
 
 public class MainActivity  extends BlunoLibrary {
 	private Button buttonScan;
@@ -21,9 +27,8 @@ protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_main);
         onCreateProcess();														//onCreate Process by BlunoLibrary
-
-
-        serialBegin(115200);													//set the Uart Baudrate on BLE chip to 115200
+        requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION}, 1);
+        serialBegin(115200);												//set the Uart Baudrate on BLE chip to 115200
 
         serialReceivedText=(TextView) findViewById(R.id.serialReveicedText);	//initial the EditText of the received data
         serialSendText=(EditText) findViewById(R.id.serialSendText);			//initial the EditText of the sending data
@@ -45,8 +50,21 @@ public void onClick(View v) {
 			@Override
 			public void onClick(View v) {
 				// TODO Auto-generated method stub
-
-				buttonScanOnClickProcess();										//Alert Dialog for selecting the BLE device
+				int permissionCheck = ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_FINE_LOCATION);
+				if (permissionCheck != PackageManager.PERMISSION_GRANTED){
+					boolean requestCheck = ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION);
+					if (requestCheck){
+						requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION}, 1);
+					}else {
+						new AlertDialog.Builder(MainActivity.this)
+								.setTitle("Permission Required")
+								.setMessage("Please enable location permission to use this application.")
+                                .setNeutralButton("I Understand", null)
+								.show();
+					}
+				}else {
+					buttonScanOnClickProcess(); //Alert Dialog for selecting the BLE device
+				}
 			}
 		});
 	}

Android/BlunoBasicDemo/app/src/main/res/layout/activity_main.xml

@@ -21,7 +21,7 @@
 
         <TextView
             android:id="@+id/serialReveicedText"
-            android:layout_width="wrap_content"
+            android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:ems="10"
             android:textSize="10sp"
@@ -53,16 +53,14 @@
     <EditText
         android:id="@+id/serialSendText"
         android:layout_width="310dp"
-        android:layout_height="40dp"
+        android:layout_height="50dp"
         android:layout_below="@+id/buttonScan"
         android:layout_centerHorizontal="true"
         android:layout_marginTop="22dp"
-        android:background="#555555"
         android:bufferType="editable"
         android:ems="10"
         android:inputType="text"
-        android:text="Data sending Area"
-        android:textColor="#999999"
+        android:hint="Data sending area"
         android:textSize="20dip" />
 
     <Button

Android/BlunoBasicDemo/app/src/main/res/layout/listitem_device.xml

@@ -16,7 +16,8 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
               android:orientation="vertical"
               android:layout_width="match_parent"
-              android:layout_height="wrap_content">
+              android:layout_height="wrap_content"
+              android:paddingHorizontal="20dp">
     <TextView android:id="@+id/device_name"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"

Android/BlunoBasicDemo/app/src/main/res/values/styles.xml

@@ -1,7 +1,7 @@
 <resources>
 
     <!-- Base application theme. -->
-    <style name="AppTheme" parent="android:Theme.Light">
+    <style name="AppTheme" parent="android:Theme.Material">
         <!-- Customize your theme here. -->
     </style>
 

Android/BlunoBasicDemo/build.gradle

@@ -3,6 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:1.5.0'
@@ -15,6 +19,10 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
 }