Added support for API 19 (Android 4.4) through API 30 (Android 11)

DeviceIdentifiersWrapper/build.gradle

@@ -3,17 +3,17 @@ apply plugin: 'com.android.library'
 ext {
     PUBLISH_GROUP_ID = 'com.zebra.deviceidentifierswrapper'
     PUBLISH_ARTIFACT_ID = 'deviceidentifierswrapper'
-    PUBLISH_VERSION = '0.1'
+    PUBLISH_VERSION = '0.2'
 }
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 30
 
     defaultConfig {
-        minSdkVersion 26
+        minSdkVersion 19
         targetSdkVersion 29
-        versionCode 1
-        versionName "0.1"
+        versionCode 2
+        versionName "0.2"
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 

DeviceIdentifiersWrapper/src/main/AndroidManifest.xml

@@ -1,3 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.zebra.deviceidentifierswrapper">
+  <uses-permission android:name="android.permission.READ_PHONE_STATE" />
+  <queries>
+    <package android:name="com.symbol.emdk.emdkservice" />
+  </queries>
 </manifest>

DeviceIdentifiersWrapper/src/main/java/com/zebra/deviceidentifierswrapper/DIHelper.java

@@ -1,14 +1,19 @@
 package com.zebra.deviceidentifierswrapper;
 
+import android.Manifest.permission;
+import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.Signature;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.AsyncTask;
+import android.os.Build;
+import android.telephony.TelephonyManager;
 import android.util.Log;
 
+import androidx.core.content.ContextCompat;
 import java.util.Base64;
 
 public class DIHelper {
@@ -22,12 +27,67 @@ public class DIHelper {
     // This method will return the serial number in the string passed through the onSuccess method
     public static void getSerialNumber(Context context, IDIResultCallbacks callbackInterface)
     {
-        new RetrieveOEMInfoTask().execute(context, Uri.parse("content://oem_info/oem.zebra.secure/build_serial"), callbackInterface);
+        if (android.os.Build.VERSION.SDK_INT < 29) {
+            returnSerialUsingAndroidAPIs(context, callbackInterface);
+        } else {
+            returnSerialUsingZebraAPIs(context, callbackInterface);
+        }
+    }
+
+    @SuppressLint({"MissingPermission", "ObsoleteSdkInt", "HardwareIds"})
+    private static void returnSerialUsingAndroidAPIs(Context context, IDIResultCallbacks callbackInterface) {
+        if (android.os.Build.VERSION.SDK_INT < 26) {
+            callbackInterface.onSuccess(Build.SERIAL);
+        } else {
+            if (ContextCompat.checkSelfPermission(context, permission.READ_PHONE_STATE) == PackageManager.PERMISSION_GRANTED) {
+                callbackInterface.onSuccess(Build.getSerial());
+            } else {
+                callbackInterface.onError("Please grant READ_PHONE_STATE permission");
+            }
+        }
+    }
+
+    private static void returnSerialUsingZebraAPIs(Context context, IDIResultCallbacks callbackInterface) {
+        new RetrieveOEMInfoTask()
+            .execute(context, Uri.parse("content://oem_info/oem.zebra.secure/build_serial"),
+                callbackInterface);
     }
 
     // This method will return the imei number in the string passed through the onSuccess method
     public static void getIMEINumber(Context context, IDIResultCallbacks callbackInterface)
     {
-        new RetrieveOEMInfoTask().execute(context, Uri.parse("content://oem_info/wan/imei"), callbackInterface);
+        if (android.os.Build.VERSION.SDK_INT < 29) {
+            returnImeiUsingAndroidAPIs(context, callbackInterface);
+        } else {
+            returnImeiUsingZebraAPIs(context, callbackInterface);
+        }
+    }
+
+    @SuppressLint({"MissingPermission", "ObsoleteSdkInt", "HardwareIds" })
+    private static void returnImeiUsingAndroidAPIs(Context context, IDIResultCallbacks callbackInterface) {
+        TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
+        if (android.os.Build.VERSION.SDK_INT < 26) {String imei = telephonyManager.getDeviceId();
+            if (imei != null && !imei.isEmpty()) {
+                callbackInterface.onSuccess(imei);
+            } else {
+                callbackInterface.onError("Could not get IMEI number");
+            }
+        } else {
+            if (ContextCompat.checkSelfPermission(context, permission.READ_PHONE_STATE) == PackageManager.PERMISSION_GRANTED) {
+                String imei = telephonyManager.getImei();
+                if (imei != null && !imei.isEmpty()) {
+                    callbackInterface.onSuccess(imei);
+                } else {
+                    callbackInterface.onError("Could not get IMEI number");
+                }
+            } else {
+                callbackInterface.onError("Please grant READ_PHONE_STATE permission");
+            }
+        }
+    }
+
+    private static void returnImeiUsingZebraAPIs(Context context, IDIResultCallbacks callbackInterface) {
+        new RetrieveOEMInfoTask().execute(context, Uri.parse("content://oem_info/wan/imei"),
+            callbackInterface);
     }
 }

SampleApplication/build.gradle

@@ -1,14 +1,14 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 30
 
     defaultConfig {
         applicationId "com.zebra.emdk_deviceidentifiers_sample"
-        minSdkVersion 29
+        minSdkVersion 19
         targetSdkVersion 29
-        versionCode 1
-        versionName "0.1"
+        versionCode 2
+        versionName "0.2"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -26,7 +26,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'com.zebra.deviceidentifierswrapper:deviceidentifierswrapper:0.1'
-    //implementation project(path: ':DeviceIdentifiersWrapper')
+    // implementation project(path: ':DeviceIdentifiersWrapper')
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

SampleApplication/src/main/res/values/strings.xml

@@ -1,3 +1,3 @@
 <resources>
-    <string name="app_name">Device ID for Android 10</string>
+    <string name="app_name">Device ID for Android 4.4 -> 11</string>
 </resources>