diff --git a/src/api-impl/android/support/multidex/MultiDexApplication.java b/src/api-impl/android/support/multidex/MultiDexApplication.java
deleted file mode 100644
index 6df27d75..00000000
--- a/src/api-impl/android/support/multidex/MultiDexApplication.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package android.support.multidex;
-
-import android.app.Application;
-import android.content.Context;
-
-/**
- * Minimal MultiDex capable application. To use the legacy multidex library there is 3 possibility:
- * <ul>
- * <li>Declare this class as the application in your AndroidManifest.xml.</li>
- * <li>Have your {@link Application} extends this class.</li>
- * <li>Have your {@link Application} override attachBaseContext starting with<br>
- * <code>
-  protected void attachBaseContext(Context base) {<br>
-    super.attachBaseContext(base);<br>
-    MultiDex.install(this);
-    </code></li>
- *   <ul>
- */
-public class MultiDexApplication extends Application {
-	protected void attachBaseContext(Context base) {
-	}
-}
diff --git a/src/api-impl/android/support/v4/app/FragmentActivity.java b/src/api-impl/android/support/v4/app/FragmentActivity.java
deleted file mode 100644
index 461b4e19..00000000
--- a/src/api-impl/android/support/v4/app/FragmentActivity.java
+++ /dev/null
@@ -1,34 +0,0 @@
-package android.support.v4.app;
-
-import android.app.Activity;
-import android.os.Bundle;
-
-public class FragmentActivity extends Activity {
-	protected void onCreate(Bundle savedInstanceState) {
-		super.onCreate(savedInstanceState);
-	}
-
-	protected void onStart() {
-		super.onStart();
-	}
-
-	protected void onRestart() {
-		super.onRestart();
-	}
-
-	protected void onResume() {
-		super.onResume();
-	}
-
-	protected void onPause() {
-		super.onPause();
-	}
-
-	protected void onStop() {
-		super.onStop();
-	}
-
-	protected void onDestroy() {
-		super.onDestroy();
-	}
-}
diff --git a/src/api-impl/android/support/v7/app/AppCompatActivity.java b/src/api-impl/android/support/v7/app/AppCompatActivity.java
deleted file mode 100644
index 30a9b071..00000000
--- a/src/api-impl/android/support/v7/app/AppCompatActivity.java
+++ /dev/null
@@ -1,6 +0,0 @@
-package android.support.v7.app;
-
-import android.app.Activity;
-
-public class AppCompatActivity extends Activity {
-}
diff --git a/src/api-impl/android/view/animation/AccelerateInterpolator.java b/src/api-impl/android/view/animation/AccelerateInterpolator.java
index e373d045..0208aab8 100644
--- a/src/api-impl/android/view/animation/AccelerateInterpolator.java
+++ b/src/api-impl/android/view/animation/AccelerateInterpolator.java
@@ -1,5 +1,25 @@
+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package android.view.animation;
 
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.util.AttributeSet;
+
 /**
  * An interpolator where the rate of change starts out slowly and
  * and then accelerates.
@@ -14,6 +34,29 @@ public class AccelerateInterpolator implements Interpolator {
 		mDoubleFactor = 2.0;
 	}
 
+	/**
+	 * Constructor
+	 *
+	 * @param factor Degree to which the animation should be eased. Seting
+	 *        factor to 1.0f produces a y=x^2 parabola. Increasing factor above
+	 *        1.0f  exaggerates the ease-in effect (i.e., it starts even
+	 *        slower and ends evens faster)
+	 */
+	public AccelerateInterpolator(float factor) {
+		mFactor = factor;
+		mDoubleFactor = 2 * mFactor;
+	}
+
+	public AccelerateInterpolator(Context context, AttributeSet attrs) {
+		TypedArray a =
+		    context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.AccelerateInterpolator);
+
+		mFactor = a.getFloat(com.android.internal.R.styleable.AccelerateInterpolator_factor, 1.0f);
+		mDoubleFactor = 2 * mFactor;
+
+		a.recycle();
+	}
+
 	public float getInterpolation(float input) {
 		if (mFactor == 1.0f) {
 			return input * input;
@@ -21,5 +64,4 @@ public class AccelerateInterpolator implements Interpolator {
 			return (float)Math.pow(input, mDoubleFactor);
 		}
 	}
-
 }
diff --git a/src/api-impl/meson.build b/src/api-impl/meson.build
index 72c433d3..58af0e90 100644
--- a/src/api-impl/meson.build
+++ b/src/api-impl/meson.build
@@ -274,9 +274,6 @@ hax_jar = jar('hax', [
               	'android/print/PrintManager.java',
               	'android/provider/Settings.java',
               	'android/R.java',
-              	'android/support/multidex/MultiDexApplication.java',
-              	'android/support/v4/app/FragmentActivity.java',
-              	'android/support/v7/app/AppCompatActivity.java',
               	'android/telecom/TelecomManager.java',
               	'android/telephony/PhoneStateListener.java',
               	'android/telephony/TelephonyManager.java',