diff --git a/README.md b/README.md
index b5c2f60..8f22e5c 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@
 |barMargin|dimension|5dp|
 |thumbHeight|dimension|30dp|
 |showAlphaBar|boolean|false|
+|showColorBar|boolean|true|
 |isVertical|boolean|false|
 |disabledColor|color|Color.GRAY|
 |showThumb|boolean|true|
@@ -39,7 +40,7 @@ allprojects {
 ```
 Step 2. Add the dependency
 ```
-implementation 'com.github.rtugeek:colorseekbar:1.7.5'
+implementation 'com.github.rtugeek:colorseekbar:1.7.6'
 ```
 
 ##  Usage
@@ -59,6 +60,8 @@ colorSeekBar.setMaxPosition(100);
 colorSeekBar.setColorSeeds(R.array.material_colors); // material_colors is defalut included in res/color,just use it.
 colorSeekBar.setColorBarPosition(10); //0 - maxValue
 colorSeekBar.setAlphaBarPosition(10); //0 - 255
+colorSeekBar.setPosition(10,10); // An easier way to set ColorBar and AlphaBar
+
 colorSeekBar.setShowAlphaBar(true);
 colorSeekBar.setBarHeight(5); //5dpi
 colorSeekBar.setThumbHeight(30); //30dpi
diff --git a/app/build.gradle b/app/build.gradle
index 187f949..2105387 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,6 +1,6 @@
 apply plugin: 'com.android.application'
 android {
-    compileSdkVersion 27
+    compileSdkVersion 28
     buildToolsVersion '28.0.3'
     defaultConfig {
         applicationId "com.rtugeek.android.colorseekbardemo"
@@ -22,5 +22,5 @@ android {
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation project(':colorseekbar')
-    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'androidx.appcompat:appcompat:1.1.0'
 }
diff --git a/app/src/main/java/com/rtugeek/android/colorseekbardemo/MainActivity.java b/app/src/main/java/com/rtugeek/android/colorseekbardemo/MainActivity.java
index fb2fb09..613862c 100644
--- a/app/src/main/java/com/rtugeek/android/colorseekbardemo/MainActivity.java
+++ b/app/src/main/java/com/rtugeek/android/colorseekbardemo/MainActivity.java
@@ -3,7 +3,7 @@
 import android.content.SharedPreferences;
 import android.graphics.Color;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.util.Log;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
@@ -44,6 +44,10 @@ protected void onCreate(Bundle savedInstanceState) {
         mColorSeekBar.setThumbHeight(30);
         mColorSeekBar.setDisabledColor(Color.GRAY);
 
+        int colorBarPosition = sp.getInt("colorBarPosition",0);
+        int alphaBarPosition = sp.getInt("alphaBarPosition",0);
+        mColorSeekBar.setPosition(colorBarPosition,alphaBarPosition);
+
         mColorSeekBar.setOnInitDoneListener(new ColorSeekBar.OnInitDoneListener() {
             @Override
             public void done() {
@@ -129,6 +133,13 @@ public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
             }
         });
 
+        ((CheckBox)findViewById(R.id.chk_show_color_bar)).setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+                mColorSeekBar.setShowColorBar(isChecked);
+            }
+        });
+
         ((SeekBar)findViewById(R.id.seek_radius)).setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
             @Override
             public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
@@ -146,6 +157,7 @@ public void onStopTrackingTouch(SeekBar seekBar) {
 
             }
         });
+
     }
 
 
@@ -153,6 +165,9 @@ public void onStopTrackingTouch(SeekBar seekBar) {
     protected void onStop() {
         super.onStop();
         spe.putInt("color", mColorSeekBar.getColor());
+        spe.putInt("colorBarPosition", mColorSeekBar.getColorBarPosition());
+        spe.putInt("alphaBarPosition", mColorSeekBar.getAlphaBarPosition());
+        spe.putInt("color", mColorSeekBar.getColor());
         spe.putBoolean("showAlpha", mColorSeekBar.isShowAlphaBar());
         spe.commit();
     }
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 0ef7e88..d0bb940 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -63,6 +63,18 @@
 
     </LinearLayout>
 
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:orientation="horizontal"
+        android:layout_height="wrap_content">
+        <CheckBox
+            android:id="@+id/chk_show_color_bar"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_centerHorizontal="true"
+            android:checked="true"
+            android:text="Show Color Bar" />
+    </LinearLayout>
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
diff --git a/build.gradle b/build.gradle
index 06b86d9..3bc2777 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,6 +4,7 @@ buildscript {
     repositories {
         google()
         jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.5.0'
@@ -19,6 +20,4 @@ allprojects {
     }
 }
 
-task clean(type: Delete) {
-    delete rootProject.buildDir
-}
+
diff --git a/colorseekbar/build.gradle b/colorseekbar/build.gradle
index 3eba2d5..407e1b8 100644
--- a/colorseekbar/build.gradle
+++ b/colorseekbar/build.gradle
@@ -6,8 +6,8 @@ android {
     defaultConfig {
         minSdkVersion 14
         targetSdkVersion 28
-        versionCode 7
-        versionName "1.7.4"
+        versionCode 8
+        versionName "1.7.6"
 
     }
     buildTypes {
@@ -22,6 +22,6 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    testImplementation 'junit:junit:4.12'
-    implementation 'com.android.support:support-annotations:28.0.0'
+    testImplementation 'junit:junit:4.13'
+    implementation 'androidx.annotation:annotation:1.1.0'
 }
\ No newline at end of file
diff --git a/colorseekbar/src/main/java/com/rtugeek/android/colorseekbar/ColorSeekBar.java b/colorseekbar/src/main/java/com/rtugeek/android/colorseekbar/ColorSeekBar.java
index 5eca276..41c30bb 100644
--- a/colorseekbar/src/main/java/com/rtugeek/android/colorseekbar/ColorSeekBar.java
+++ b/colorseekbar/src/main/java/com/rtugeek/android/colorseekbar/ColorSeekBar.java
@@ -13,7 +13,9 @@
 import android.graphics.RectF;
 import android.graphics.Shader;
 import android.os.Build;
-import android.support.annotation.ArrayRes;
+
+import androidx.annotation.ArrayRes;
+
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.view.View;
@@ -29,6 +31,7 @@ public class ColorSeekBar extends View {
     private OnColorChangeListener mOnColorChangeLister;
     private Context mContext;
     private boolean mIsShowAlphaBar = false;
+    private boolean mIsShowColorBar = true;
     private boolean mIsVertical;
     private boolean mMovingColorBar;
     private boolean mMovingAlphaBar;
@@ -102,8 +105,8 @@ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         int widthSpeMode = MeasureSpec.getMode(widthMeasureSpec);
         int heightSpeMode = MeasureSpec.getMode(heightMeasureSpec);
 
-        int barHeight = mIsShowAlphaBar ? mBarHeight * 2 : mBarHeight;
-        int thumbHeight = mIsShowAlphaBar ? mThumbHeight * 2 : mThumbHeight;
+        int barHeight = (mIsShowAlphaBar && mIsShowColorBar) ? mBarHeight * 2 : mBarHeight;
+        int thumbHeight = (mIsShowAlphaBar && mIsShowColorBar) ? mThumbHeight * 2 : mThumbHeight;
 
         Logger.i("widthSpeMode:");
         Logger.spec(widthSpeMode);
@@ -136,7 +139,8 @@ protected void applyStyle(Context context, AttributeSet attrs, int defStyleAttr,
         mDisabledColor = a.getInteger(R.styleable.ColorSeekBar_disabledColor, Color.GRAY);
         mIsVertical = a.getBoolean(R.styleable.ColorSeekBar_isVertical, false);
         mIsShowAlphaBar = a.getBoolean(R.styleable.ColorSeekBar_showAlphaBar, false);
-        mShowThumb = a.getBoolean(R.styleable.ColorSeekBar_showAlphaBar, true);
+        mIsShowColorBar = a.getBoolean(R.styleable.ColorSeekBar_showColorBar, true);
+        mShowThumb = a.getBoolean(R.styleable.ColorSeekBar_showThumb, true);
         int backgroundColor = a.getColor(R.styleable.ColorSeekBar_bgColor, Color.TRANSPARENT);
         mBarHeight = (int) a.getDimension(R.styleable.ColorSeekBar_barHeight, (float) dp2px(2));
         mBarRadius = (int) a.getDimension(R.styleable.ColorSeekBar_barRadius, 0);
@@ -242,37 +246,46 @@ protected void onDraw(Canvas canvas) {
             canvas.scale(-1, 1, getHeight() / 2, getWidth() / 2);
         }
 
-        float colorPosition = (float) mColorBarPosition / mMaxPosition * mBarWidth;
-
-        colorPaint.setAntiAlias(true);
         int color = isEnabled() ? getColor(false) : mDisabledColor;
+
         int colorStartTransparent = Color.argb(mAlphaMaxPosition, Color.red(color), Color.green(color), Color.blue(color));
         int colorEndTransparent = Color.argb(mAlphaMinPosition, Color.red(color), Color.green(color), Color.blue(color));
-        colorPaint.setColor(color);
         int[] toAlpha = new int[]{colorStartTransparent, colorEndTransparent};
-        //clear
-        canvas.drawBitmap(mTransparentBitmap, 0, 0, null);
-
-        //draw color bar
-        canvas.drawRoundRect(mColorRect,mBarRadius,mBarRadius, isEnabled() ? mColorRectPaint : mDisabledPaint);
-        //draw color bar thumb
-        if(mShowThumb){
-            float thumbX = colorPosition + realLeft;
-            float thumbY = mColorRect.top + mColorRect.height() / 2;
-            canvas.drawCircle(thumbX, thumbY, mBarHeight / 2 + 5, colorPaint);
-
-            //draw color bar thumb radial gradient shader
-            RadialGradient thumbShader = new RadialGradient(thumbX, thumbY, mThumbRadius, toAlpha, null, Shader.TileMode.MIRROR);
-            thumbGradientPaint.setAntiAlias(true);
-            thumbGradientPaint.setShader(thumbShader);
-            canvas.drawCircle(thumbX, thumbY, mThumbHeight / 2, thumbGradientPaint);
+
+        if (mIsShowColorBar) {
+            float colorPosition = (float) mColorBarPosition / mMaxPosition * mBarWidth;
+            colorPaint.setAntiAlias(true);
+            colorPaint.setColor(color);
+            //clear
+            canvas.drawBitmap(mTransparentBitmap, 0, 0, null);
+
+            //draw color bar
+            canvas.drawRoundRect(mColorRect, mBarRadius, mBarRadius, isEnabled() ? mColorRectPaint : mDisabledPaint);
+            //draw color bar thumb
+            if (mShowThumb) {
+                float thumbX = colorPosition + realLeft;
+                float thumbY = mColorRect.top + mColorRect.height() / 2;
+                canvas.drawCircle(thumbX, thumbY, mBarHeight / 2 + 5, colorPaint);
+
+                //draw color bar thumb radial gradient shader
+                RadialGradient thumbShader = new RadialGradient(thumbX, thumbY, mThumbRadius, toAlpha, null, Shader.TileMode.MIRROR);
+                thumbGradientPaint.setAntiAlias(true);
+                thumbGradientPaint.setShader(thumbShader);
+                canvas.drawCircle(thumbX, thumbY, mThumbHeight / 2, thumbGradientPaint);
+            }
         }
 
 
         if (mIsShowAlphaBar) {
             //init rect
-            int top = (int) (mThumbHeight + mThumbRadius + mBarHeight + mBarMargin);
-            mAlphaRect = new RectF(realLeft, top, realRight, top + mBarHeight);
+            if (mIsShowColorBar) {
+                int top = mIsShowColorBar ? (int) (mThumbHeight + mThumbRadius + mBarHeight + mBarMargin) :
+                        (int) (mThumbHeight + mThumbRadius + mBarMargin);
+                mAlphaRect = new RectF(realLeft, top, realRight, top + mBarHeight);
+            } else {
+                mAlphaRect = new RectF(mColorRect);
+            }
+
             //draw alpha bar
             alphaBarPaint.setAntiAlias(true);
             LinearGradient alphaBarShader = new LinearGradient(0, 0, mAlphaRect.width(), 0, toAlpha, null, Shader.TileMode.CLAMP);
@@ -280,7 +293,7 @@ protected void onDraw(Canvas canvas) {
             canvas.drawRect(mAlphaRect, alphaBarPaint);
 
             //draw alpha bar thumb
-            if(mShowThumb){
+            if (mShowThumb) {
                 float alphaPosition = (float) (mAlphaBarPosition - mAlphaMinPosition) / (mAlphaMaxPosition - mAlphaMinPosition) * mBarWidth;
                 float alphaThumbX = alphaPosition + realLeft;
                 float alphaThumbY = mAlphaRect.top + mAlphaRect.height() / 2;
@@ -318,14 +331,12 @@ public boolean onTouchEvent(MotionEvent event) {
         float y = mIsVertical ? event.getX() : event.getY();
         switch (event.getAction()) {
             case MotionEvent.ACTION_DOWN:
-                if (isOnBar(mColorRect, x, y)) {
+                if (mIsShowColorBar && isOnBar(mColorRect, x, y)) {
                     mMovingColorBar = true;
                     float value = (x - realLeft) / mBarWidth * mMaxPosition;
                     setColorBarPosition((int) value);
-                } else if (mIsShowAlphaBar) {
-                    if (isOnBar(mAlphaRect, x, y)) {
-                        mMovingAlphaBar = true;
-                    }
+                } else if (mIsShowAlphaBar && isOnBar(mAlphaRect, x, y)) {
+                    mMovingAlphaBar = true;
                 }
                 break;
             case MotionEvent.ACTION_MOVE:
@@ -613,10 +624,8 @@ private void setAlphaValue() {
         mAlpha = 255 - mAlphaBarPosition;
     }
 
-    public void setAlphaBarPosition(int value) {
-        this.mAlphaBarPosition = value;
-        setAlphaValue();
-        invalidate();
+    public void setAlphaBarPosition(int position) {
+        setPosition(mColorBarPosition,position);
     }
 
     public int getMaxValue() {
@@ -658,15 +667,20 @@ public void setBarMarginPx(int mBarMargin) {
      * @param value
      */
     public void setColorBarPosition(int value) {
-        this.mColorBarPosition = value;
+        setPosition(value,mAlphaBarPosition);
+    }
+
+    public void setPosition(int colorBarPosition,int alphaBarPosition) {
+        this.mColorBarPosition = colorBarPosition;
         mColorBarPosition = mColorBarPosition > mMaxPosition ? mMaxPosition : mColorBarPosition;
         mColorBarPosition = mColorBarPosition < 0 ? 0 : mColorBarPosition;
+        this.mAlphaBarPosition = alphaBarPosition;
+        setAlphaValue();
         invalidate();
         if (mOnColorChangeLister != null) {
             mOnColorChangeLister.onColorChangeListener(mColorBarPosition, mAlphaBarPosition, getColor());
         }
     }
-
     public void setOnInitDoneListener(OnInitDoneListener listener) {
         this.mOnInitDoneListener = listener;
     }
@@ -760,6 +774,7 @@ public int getBarRadius() {
 
     /**
      * Set bar radius with px unit
+     *
      * @param barRadiusInPx
      */
     public void setBarRadius(int barRadiusInPx) {
@@ -767,4 +782,13 @@ public void setBarRadius(int barRadiusInPx) {
         invalidate();
     }
 
+    public boolean isIsShowColorBar() {
+        return mIsShowColorBar;
+    }
+
+    public void setShowColorBar(boolean isShowColorBar) {
+        this.mIsShowColorBar = isShowColorBar;
+        refreshLayoutParams();
+        invalidate();
+    }
 }
diff --git a/colorseekbar/src/main/res/values/attrs.xml b/colorseekbar/src/main/res/values/attrs.xml
index 163751e..a7e3930 100644
--- a/colorseekbar/src/main/res/values/attrs.xml
+++ b/colorseekbar/src/main/res/values/attrs.xml
@@ -5,6 +5,7 @@
         <attr name="barHeight" format="dimension" />
         <attr name="thumbHeight" format="dimension" />
         <attr name="showAlphaBar" format="boolean" />
+        <attr name="showColorBar" format="boolean" />
         <attr name="alphaBarPosition" format="integer" />
         <attr name="colorBarPosition" format="integer" />
         <attr name="bgColor" format="color"/>
diff --git a/gradle.properties b/gradle.properties
index 1d3591c..915f0e6 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -15,4 +15,6 @@
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
-# org.gradle.parallel=true
\ No newline at end of file
+# org.gradle.parallel=true
+android.enableJetifier=true
+android.useAndroidX=true
\ No newline at end of file