Add signature to crash reporter info

crashreporter/src/main/java/com/balsikandar/crashreporter/utils/AppUtils.java

@@ -11,6 +11,8 @@ import android.util.Log;
 import java.util.TimeZone;
 import java.util.UUID;
 
+import static com.balsikandar.crashreporter.utils.AppUtilsKt.getAppSignature;
+
 /**
  * Created by bali on 12/08/17.
  */
@@ -37,6 +39,7 @@ public class AppUtils {
 
         return "APP.VERSION : " + getAppVersion(context)
                 + "\nAPP.VERSIONCODE : " + getAppVersionCode(context)
+                + "\nAPP.SIGNATURE : " + getAppSignature(context)
                 + "\nLAUNCHER.APP : " + getCurrentLauncherApp(context)
                 + "\nTIMEZONE : " + timeZone()
                 + "\nVERSION.RELEASE : " + Build.VERSION.RELEASE

crashreporter/src/main/java/com/balsikandar/crashreporter/utils/AppUtils.kt

@@ -0,0 +1,28 @@
+package com.balsikandar.crashreporter.utils
+
+import android.content.Context
+import android.content.pm.PackageManager
+import android.os.Build
+import android.util.Base64
+import java.security.MessageDigest
+
+internal fun getAppSignature(context: Context): String {
+    val signature = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+        val pi = context.packageManager.getPackageInfo(
+            context.packageName,
+            PackageManager.GET_SIGNING_CERTIFICATES
+        )
+        pi.signingInfo.apkContentsSigners.firstOrNull()
+    } else {
+        val pi = context.packageManager.getPackageInfo(
+            context.packageName,
+            PackageManager.GET_SIGNATURES
+        )
+        pi.signatures.firstOrNull()
+    }
+    return if (signature != null) {
+        val digest = MessageDigest.getInstance("SHA")
+        digest.update(signature.toByteArray())
+        Base64.encodeToString(digest.digest(), Base64.NO_WRAP)
+    } else "null"
+}