minSdkVersion brought back to 9

app/build.gradle

@@ -28,7 +28,7 @@ android {
     compileSdkVersion 23
     buildToolsVersion '23.0.2'
     defaultConfig {
-        minSdkVersion 15
+        minSdkVersion 9
         targetSdkVersion 23
         versionCode 143
         versionName '2.1.4'
@@ -61,7 +61,7 @@ dependencies {
     compile 'org.solovyev:common-security:1.0.7'
     compile 'com.android.support:support-v4:23.1.1'
     compile 'com.android.support:appcompat-v7:23.1.1'
-    compile('ch.acra:acra:4.5.0') {
+    compile('ch.acra:acra:4.7.0') {
         exclude group: 'org.json'
     }
     compile 'org.solovyev.android.views.dragbutton:drag-button:1.0@aar'
@@ -81,7 +81,7 @@ dependencies {
     compile 'com.google.android.gms:play-services-analytics:8.4.0'
     compile 'com.melnykov:floatingactionbutton:1.1.0'
     compile(name: 'plotter', ext: 'aar')
-    testCompile "com.squareup.leakcanary:leakcanary-android-no-op:1.3.1"
+    testCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.3.1'
     debugCompile 'com.squareup.leakcanary:leakcanary-android:1.3.1'
     releaseCompile 'com.squareup.leakcanary:leakcanary-android-no-op:1.3.1'
     compile 'org.solovyev:common-text:1.0.7'

app/proguard-debug.cfg

@@ -68,6 +68,9 @@
 -dontwarn com.google.android.gms.internal.**
 -dontwarn com.google.android.gms.common.internal.**
 
+-keep class com.squareup.leakcanary.** { *; }
+-dontwarn com.squareup.leakcanary.**
+
 -keep class org.simpleframework.xml.** { *; }
 -keep class * implements org.solovyev.android.calculator.model.MathPersistenceEntity
 -keep class * implements org.solovyev.android.calculator.MathEntityPersistenceContainer

app/proguard.cfg

@@ -67,6 +67,9 @@
 -dontwarn com.google.android.gms.internal.**
 -dontwarn com.google.android.gms.common.internal.**
 
+-keep class com.squareup.leakcanary.** { *; }
+-dontwarn com.squareup.leakcanary.**
+
 -keep class org.simpleframework.xml.** { *; }
 -keep class * implements org.solovyev.android.calculator.model.MathPersistenceEntity
 -keep class * implements org.solovyev.android.calculator.MathEntityPersistenceContainer

app/src/main/java/org/solovyev/android/calculator/CalculatorApplication.java

@@ -54,7 +54,7 @@ import java.util.concurrent.TimeUnit;
 
 import javax.annotation.Nonnull;
 
-@ReportsCrashes(formKey = "",
+@ReportsCrashes(
         formUri = "https://serso.cloudant.com/acra-cpp/_design/acra-storage/_update/report",
         reportType = org.acra.sender.HttpSender.Type.JSON,
         httpMethod = org.acra.sender.HttpSender.Method.PUT,