Update library usage

README.md

@@ -3,10 +3,84 @@ Simple color picker library for Android
 
 <img src="https://github.com/naz013/ColorSlider/raw/master/res/screenshow.png" width="400" alt="Screenshot">
 
-## Installation
-TODO: Describe the installation process
-## Usage
-TODO: Write usage instructions
+Download
+--------
+Download latest version with Gradle:
+```groovy
+repositories {
+    maven { url 'https://jitpack.io' }
+}
+
+dependencies {
+    compile 'com.github.naz013:ColorSlider:1.0.1'
+}
+```
+
+Usage
+-----
+Default (Material colors picker):
+```xml
+<com.github.naz013.colorslider.ColorSlider
+        android:id="@+id/color_slider"
+        android:layout_width="match_parent"
+        android:layout_height="36dp" />
+```
+Gradient (Params: cs_from_color, cs_to_color, cs_steps):
+via XML:
+```xml
+<com.github.naz013.colorslider.ColorSlider
+        android:id="@+id/color_slider"
+        android:layout_width="match_parent"
+        app:cs_from_color="#F44336"
+        app:cs_steps="500"
+        app:cs_to_color="#40F44336"
+        android:layout_height="36dp" />
+```
+in code:
+```java
+colorSlider.setGradient(@ColorInt int fromColor, @ColorInt int toColor, int steps)
+```
+
+
+Array of color resources (Params: cs_colors):
+via XML:
+```xml
+<com.github.naz013.colorslider.ColorSlider
+        android:id="@+id/color_slider"
+        android:layout_width="match_parent"
+        app:cs_colors="@array/colors"
+        android:layout_height="36dp" />
+```
+in code:
+```java
+colorSlider.setColors(@ColorInt int[] colors)
+```
+
+
+String array of hex colors (Params: cs_hex_colors):
+via XML:
+```xml
+<com.github.naz013.colorslider.ColorSlider
+        android:id="@+id/color_slider"
+        android:layout_width="match_parent"
+        app:cs_hex_colors="@array/hex_colors"
+        android:layout_height="36dp" />
+```
+in code:
+```java
+colorSlider.setHexColors(String[] hexColors)
+```
+
+Also you can set listener for color picker:
+```java
+colorSlider.setListener(new ColorSlider.OnColorSelectedListener() {
+        @Override
+        public void onColorChanged(int position, int color) {
+            updateView(color);
+        }
+    })
+```
+
 
 License
 -------