diff --git a/README.md b/README.md
index 12573fd..983ac40 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 
 Realtime camera filters. Process frames by OpenGL shaders.
 
-**[Download the apk](https://github.com/WeLikeVis/CameraFilter/releases/download/2.1.1/app-debug.apk)** to have a try.
+**[Download the apk](https://github.com/WeLikeVis/CameraFilter/releases/download/2.2/CameraFilter.apk)** to have a try.
 
 ## Filters
 
diff --git a/app/build.gradle b/app/build.gradle
index 86f8473..c857337 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,15 +1,15 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "24.0.0"
+    compileSdkVersion 24
+    buildToolsVersion "24.0.2"
 
     defaultConfig {
         applicationId "cn.nekocode.camerafilter"
         minSdkVersion 15
-        targetSdkVersion 23
+        targetSdkVersion 24
         versionCode 211
-        versionName "2.1.1"
+        versionName "2.2"
     }
     buildTypes {
         release {
@@ -21,5 +21,5 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:23.4.0'
+    compile 'com.android.support:appcompat-v7:24.2.1'
 }
diff --git a/app/src/main/java/cn/nekocode/camerafilter/CameraRenderer.java b/app/src/main/java/cn/nekocode/camerafilter/CameraRenderer.java
index f1cf327..1aa7481 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/CameraRenderer.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/CameraRenderer.java
@@ -57,14 +57,15 @@
 import cn.nekocode.camerafilter.filter.TrianglesMosaicFilter;
 
 /**
- * Created by nekocode on 16/8/5.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
-public class CameraRenderer extends Thread implements TextureView.SurfaceTextureListener {
+public class CameraRenderer implements Runnable, TextureView.SurfaceTextureListener {
     private static final String TAG = "CameraRenderer";
     private static final int EGL_OPENGL_ES2_BIT = 4;
     private static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
     private static final int DRAW_INTERVAL = 1000 / 30;
 
+    private Thread renderThread;
     private Context context;
     private SurfaceTexture surfaceTexture;
     private int gwidth, gheight;
@@ -78,6 +79,7 @@ public class CameraRenderer extends Thread implements TextureView.SurfaceTexture
     private SurfaceTexture cameraSurfaceTexture;
     private int cameraTextureId;
     private CameraFilter selectedFilter;
+    private int selectedFilterId = R.id.filter0;
     private SparseArray<CameraFilter> cameraFilterMap = new SparseArray<>();
 
     public CameraRenderer(Context context) {
@@ -90,7 +92,8 @@ public void onSurfaceTextureUpdated(SurfaceTexture surface) {
 
     @Override
     public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
-        GLES20.glViewport(0, 0, gwidth = width, gheight = height);
+        gwidth = -width;
+        gheight = -height;
     }
 
     @Override
@@ -99,7 +102,9 @@ public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
             camera.stopPreview();
             camera.release();
         }
-        interrupt();
+        if (renderThread != null && renderThread.isAlive()) {
+            renderThread.interrupt();
+        }
         CameraFilter.release();
 
         return true;
@@ -107,12 +112,14 @@ public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
 
     @Override
     public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
-        if (isAlive()) {
-            interrupt();
+        if (renderThread != null && renderThread.isAlive()) {
+            renderThread.interrupt();
         }
+        renderThread = new Thread(this);
 
         surfaceTexture = surface;
-        GLES20.glViewport(0, 0, gwidth = width, gheight = height);
+        gwidth = -width;
+        gheight = -height;
 
         // Open camera
         Pair<Camera.CameraInfo, Integer> backCamera = getBackCamera();
@@ -120,12 +127,14 @@ public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int hei
         camera = Camera.open(backCameraId);
 
         // Start rendering
-        start();
+        renderThread.start();
     }
 
     public void setSelectedFilter(int id) {
+        selectedFilterId = id;
         selectedFilter = cameraFilterMap.get(id);
-        selectedFilter.onAttach();
+        if (selectedFilter != null)
+            selectedFilter.onAttach();
     }
 
     @Override
@@ -154,7 +163,7 @@ public void run() {
         cameraFilterMap.append(R.id.filter18, new CrackedFilter(context));
         cameraFilterMap.append(R.id.filter19, new PolygonizationFilter(context));
         cameraFilterMap.append(R.id.filter20, new JFAVoronoiFilter(context));
-        setSelectedFilter(R.id.filter0);
+        setSelectedFilter(selectedFilterId);
 
         // Create texture for camera preview
         cameraTextureId = MyGLUtils.genTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES);
@@ -171,6 +180,9 @@ public void run() {
         // Render loop
         while (!Thread.currentThread().isInterrupted()) {
             try {
+                if (gwidth < 0 && gheight < 0)
+                    GLES20.glViewport(0, 0, gwidth = -gwidth, gheight = -gheight);
+
                 GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
 
                 // Update the camera preview texture
@@ -201,12 +213,14 @@ private void initGL(SurfaceTexture texture) {
 
         eglDisplay = egl10.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
         if (eglDisplay == EGL10.EGL_NO_DISPLAY) {
-            throw new RuntimeException("eglGetDisplay failed " + android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
+            throw new RuntimeException("eglGetDisplay failed " +
+                    android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
         }
 
         int[] version = new int[2];
         if (!egl10.eglInitialize(eglDisplay, version)) {
-            throw new RuntimeException("eglInitialize failed " + android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
+            throw new RuntimeException("eglInitialize failed " +
+                    android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
         }
 
         int[] configsCount = new int[1];
@@ -225,7 +239,8 @@ private void initGL(SurfaceTexture texture) {
 
         EGLConfig eglConfig = null;
         if (!egl10.eglChooseConfig(eglDisplay, configSpec, configs, 1, configsCount)) {
-            throw new IllegalArgumentException("eglChooseConfig failed " + android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
+            throw new IllegalArgumentException("eglChooseConfig failed " +
+                    android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
         } else if (configsCount[0] > 0) {
             eglConfig = configs[0];
         }
@@ -243,11 +258,13 @@ private void initGL(SurfaceTexture texture) {
                 Log.e(TAG, "eglCreateWindowSurface returned EGL10.EGL_BAD_NATIVE_WINDOW");
                 return;
             }
-            throw new RuntimeException("eglCreateWindowSurface failed " + android.opengl.GLUtils.getEGLErrorString(error));
+            throw new RuntimeException("eglCreateWindowSurface failed " +
+                    android.opengl.GLUtils.getEGLErrorString(error));
         }
 
         if (!egl10.eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext)) {
-            throw new RuntimeException("eglMakeCurrent failed " + android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
+            throw new RuntimeException("eglMakeCurrent failed " +
+                    android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
         }
     }
 
diff --git a/app/src/main/java/cn/nekocode/camerafilter/MainActivity.java b/app/src/main/java/cn/nekocode/camerafilter/MainActivity.java
index 13186d5..1adfc18 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/MainActivity.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/MainActivity.java
@@ -38,6 +38,9 @@
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
+/**
+ * @author nekocode (nekocode.cn@gmail.com)
+ */
 public class MainActivity extends AppCompatActivity {
     private static final int REQUEST_CAMERA_PERMISSION = 101;
     private CameraRenderer renderer;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/MyGLUtils.java b/app/src/main/java/cn/nekocode/camerafilter/MyGLUtils.java
index 0769f4d..f352754 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/MyGLUtils.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/MyGLUtils.java
@@ -31,7 +31,7 @@
 import javax.microedition.khronos.opengles.GL10;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class MyGLUtils {
     private static final String TAG = "MyGLUtils";
diff --git a/app/src/main/java/cn/nekocode/camerafilter/RenderBuffer.java b/app/src/main/java/cn/nekocode/camerafilter/RenderBuffer.java
index 5c039ae..dc2ed39 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/RenderBuffer.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/RenderBuffer.java
@@ -24,7 +24,7 @@
 import javax.microedition.khronos.opengles.GL10;
 
 /**
- * Created by nekocode on 16/8/12.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class RenderBuffer {
     private int texId = 0;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/AsciiArtFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/AsciiArtFilter.java
index 5f5bdee..12bcf61 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/AsciiArtFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/AsciiArtFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class AsciiArtFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/BasicDeformFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/BasicDeformFilter.java
index 7257a5c..1eba8ad 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/BasicDeformFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/BasicDeformFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class BasicDeformFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/BlueorangeFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/BlueorangeFilter.java
index c66c0d1..976078c 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/BlueorangeFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/BlueorangeFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class BlueorangeFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/CameraFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/CameraFilter.java
index 033bd23..e1c7975 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/CameraFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/CameraFilter.java
@@ -29,7 +29,7 @@
 import cn.nekocode.camerafilter.RenderBuffer;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public abstract class CameraFilter {
     static final float SQUARE_COORDS[] = {
@@ -128,7 +128,7 @@ final public void draw(int cameraTexId, int canvasWidth, int canvasHeight) {
 
         onDraw(CAMERA_RENDER_BUF.getTexId(), canvasWidth, canvasHeight);
 
-        iFrame ++;
+        iFrame++;
     }
 
     abstract void onDraw(int cameraTexId, int canvasWidth, int canvasHeight);
@@ -159,7 +159,7 @@ void setupShaderInputs(int program, FloatBuffer vertex, FloatBuffer textureCoord
         GLES20.glEnableVertexAttribArray(vTexCoordLocation);
         GLES20.glVertexAttribPointer(vTexCoordLocation, 2, GLES20.GL_FLOAT, false, 4 * 2, textureCoord);
 
-        for (int i = 0; i < iChannels.length; i ++) {
+        for (int i = 0; i < iChannels.length; i++) {
             int sTextureLocation = GLES20.glGetUniformLocation(program, "iChannel" + i);
             GLES20.glActiveTexture(GLES20.GL_TEXTURE0 + i);
             GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, iChannels[i]);
@@ -168,9 +168,9 @@ void setupShaderInputs(int program, FloatBuffer vertex, FloatBuffer textureCoord
 
         float _iChannelResolutions[] = new float[iChannelResolutions.length * 3];
         for (int i = 0; i < iChannelResolutions.length; i++) {
-            _iChannelResolutions[i*3] = iChannelResolutions[i][0];
-            _iChannelResolutions[i*3 + 1] = iChannelResolutions[i][1];
-            _iChannelResolutions[i*3 + 2] = 1.0f;
+            _iChannelResolutions[i * 3] = iChannelResolutions[i][0];
+            _iChannelResolutions[i * 3 + 1] = iChannelResolutions[i][1];
+            _iChannelResolutions[i * 3 + 2] = 1.0f;
         }
 
         int iChannelResolutionLocation = GLES20.glGetUniformLocation(program, "iChannelResolution");
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/ChromaticAberrationFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/ChromaticAberrationFilter.java
index db7472b..0a9be3d 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/ChromaticAberrationFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/ChromaticAberrationFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class ChromaticAberrationFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/ContrastFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/ContrastFilter.java
index 72d86f3..0bd7bc7 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/ContrastFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/ContrastFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class ContrastFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/CrackedFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/CrackedFilter.java
index bf32322..eb1fc46 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/CrackedFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/CrackedFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class CrackedFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/CrosshatchFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/CrosshatchFilter.java
index e98d8d5..9e5d522 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/CrosshatchFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/CrosshatchFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class CrosshatchFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/EMInterferenceFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/EMInterferenceFilter.java
index 6a1c10d..4f8ed22 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/EMInterferenceFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/EMInterferenceFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class EMInterferenceFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/EdgeDetectionFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/EdgeDetectionFilter.java
index d2d319c..627826a 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/EdgeDetectionFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/EdgeDetectionFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class EdgeDetectionFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/JFAVoronoiFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/JFAVoronoiFilter.java
index a5a4bc2..67c4bab 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/JFAVoronoiFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/JFAVoronoiFilter.java
@@ -23,8 +23,7 @@
 import cn.nekocode.camerafilter.RenderBuffer;
 
 /**
- * Created by nekocode on 16/8/6.
- * TODO Not working well
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class JFAVoronoiFilter extends CameraFilter {
     private int programImg;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/LegofiedFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/LegofiedFilter.java
index 8a82ffb..8286510 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/LegofiedFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/LegofiedFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class LegofiedFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/LichtensteinEsqueFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/LichtensteinEsqueFilter.java
index 0609805..f37d644 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/LichtensteinEsqueFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/LichtensteinEsqueFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class LichtensteinEsqueFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/MappingFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/MappingFilter.java
index 293f65a..4f8ec5a 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/MappingFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/MappingFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class MappingFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/MoneyFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/MoneyFilter.java
index 7aefe2b..2409315 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/MoneyFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/MoneyFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class MoneyFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/NoiseWarpFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/NoiseWarpFilter.java
index 3834080..eca2b1f 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/NoiseWarpFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/NoiseWarpFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class NoiseWarpFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/OriginalFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/OriginalFilter.java
index cb74ff6..27c8c9e 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/OriginalFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/OriginalFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class OriginalFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/PixelizeFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/PixelizeFilter.java
index 8fff346..21a24b8 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/PixelizeFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/PixelizeFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class PixelizeFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/PolygonizationFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/PolygonizationFilter.java
index bb993af..69cf5f2 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/PolygonizationFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/PolygonizationFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class PolygonizationFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/RefractionFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/RefractionFilter.java
index 36e76e4..ebed184 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/RefractionFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/RefractionFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class RefractionFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/TileMosaicFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/TileMosaicFilter.java
index f7394bf..4b163c9 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/TileMosaicFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/TileMosaicFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class TileMosaicFilter extends CameraFilter {
     private int program;
diff --git a/app/src/main/java/cn/nekocode/camerafilter/filter/TrianglesMosaicFilter.java b/app/src/main/java/cn/nekocode/camerafilter/filter/TrianglesMosaicFilter.java
index f131022..49f565c 100644
--- a/app/src/main/java/cn/nekocode/camerafilter/filter/TrianglesMosaicFilter.java
+++ b/app/src/main/java/cn/nekocode/camerafilter/filter/TrianglesMosaicFilter.java
@@ -22,7 +22,7 @@
 import cn.nekocode.camerafilter.R;
 
 /**
- * Created by nekocode on 16/8/6.
+ * @author nekocode (nekocode.cn@gmail.com)
  */
 public class TrianglesMosaicFilter extends CameraFilter {
     private int program;
diff --git a/build.gradle b/build.gradle
index 77ce66e..a3330d4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
+        classpath 'com.android.tools.build:gradle:2.2.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files