Override both versions of onAttach

fixes #101

library/build.gradle

@@ -14,12 +14,12 @@ def gitCommitCount =
         Integer.parseInt('git rev-list --count HEAD'.execute([], project.rootDir).text.trim())
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.2"
+    compileSdkVersion 24
+    buildToolsVersion "23.0.3"
 
     defaultConfig {
         minSdkVersion 9
-        targetSdkVersion 23
+        targetSdkVersion 24
         versionCode gitCommitCount
         versionName gitTag
     }
@@ -27,9 +27,9 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:23.4.0'
-    compile 'com.android.support:support-v4:23.4.0'
-    compile 'com.android.support:recyclerview-v7:23.4.0'
+    compile 'com.android.support:appcompat-v7:24.0.0'
+    compile 'com.android.support:support-v4:24.0.0'
+    compile 'com.android.support:recyclerview-v7:24.0.0'
 
     testCompile 'junit:junit:4.12'
 }

library/src/main/java/com/nononsenseapps/filepicker/AbstractFilePickerFragment.java

@@ -6,9 +6,11 @@
 
 package com.nononsenseapps.filepicker;
 
+import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.Context;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
@@ -350,9 +352,27 @@ public abstract class AbstractFilePickerFragment<T> extends Fragment
         return checkable;
     }
 
+    @SuppressWarnings("deprecation")
+    @Override
+    public void onAttach(Activity activity) {
+        super.onAttach(activity);
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+            onAttachToContext(activity);
+        }
+    }
+
+    @TargetApi(23)
     @Override
     public void onAttach(Context context) {
         super.onAttach(context);
+        onAttachToContext(context);
+    }
+
+    /**
+     * Called when attached to activity/context
+     * @param context we attached to
+     */
+    protected void onAttachToContext(Context context) {
         try {
             mListener = (OnFilePickedListener) context;
         } catch (ClassCastException e) {

sample/build.gradle

@@ -11,8 +11,8 @@ def gitCommitCount =
         Integer.parseInt('git rev-list --count HEAD'.execute([], project.rootDir).text.trim())
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.2"
+    compileSdkVersion 24
+    buildToolsVersion "23.0.3"
 
     packagingOptions {
         exclude 'META-INF/LICENSE.txt'
@@ -25,7 +25,7 @@ android {
 
     defaultConfig {
         minSdkVersion 18
-        targetSdkVersion 23
+        targetSdkVersion 24
         versionCode gitCommitCount
         versionName gitTag
         archivesBaseName = "nononsensefilepicker-sample-${gitTag}".toString()