dependencies {
    implementation 'me.samlss:rainyview:1.0.0'
}

<dependency>
  <groupId>me.samlss</groupId>
  <artifactId>rainyview</artifactId>
  <version>1.0.0</version>
  <type>pom</type>
</dependency>

    <me.samlss.view.RainyView
          app:left_cloud_color="#B7AC8D"
          app:right_cloud_color="#9b8f84"
          app:raindrop_color="#9aa9bb"
          app:raindrop_creation_interval="10"
          app:raindrop_max_number="50"
          app:raindrop_max_length="50"
          app:raindrop_min_length="20"
          app:raindrop_min_speed="1"
          app:raindrop_max_speed="3"
          app:raindrop_size="15"
          app:raindrop_slope="-4"
          android:layout_weight="1"
          android:layout_width="0dp"
          android:layout_height="match_parent" />

rainyView.setLeftCloudColor(Color.parseColor("#B7AC8D")); //Set the color of the left cloud
rainyView.setRightCloudColor(Color.parseColor("#9b8f84")); //Set the color of the right cloud
rainyView.setRainDropColor(Color.parseColor("#9aa9bb")); //Set the color of the raindrop
rainyView.setRainDropMaxNumber(50); //Set the max number of the raindrop
rainyView.setRainDropMaxLength(50); //Set the max length of the raindrop
rainyView.setRainDropMinLength(20); //Set the min length of the raindrop
rainyView.setRainDropMaxSpeed(3); //Set the max speed of the raindrop
rainyView.setRainDropMinSpeed(1); //Set the min speed of the raindrop
rainyView.setRainDropSlope(-4); //Set the slope of the raindrop
rainyView.setRainDropCreationInterval(10); //Set the creation interval of the raindrop

rainyView.start(); //Start animation
rainyView.stop(); //Stop animation
rainyView.release(); //Release the rainy view

    <declare-styleable name="RainyView">
        <!--The color of raindrop-->
        <attr name="raindrop_color" format="color"></attr>

        <!--The color of the left cloud-->
        <attr name="left_cloud_color" format="color"></attr>

        <!--The color of the right cloud-->
        <attr name="right_cloud_color" format="color"></attr>

        <!--Number of raindrops that can coexist at the same time-->
        <attr name="raindrop_max_number" format="integer"></attr>

        <!--The creation of the raindrop interval in millis-->
        <attr name="raindrop_creation_interval" format="integer"></attr>

        <!--The min length in pixel of every raindrop-->
        <attr name="raindrop_min_length" format="integer"></attr>

        <!--The max length in pixel of every raindrop-->
        <attr name="raindrop_max_length" format="integer"></attr>

        <!--The size in pixel of every raindrop-->
        <attr name="raindrop_size" format="integer"></attr>

        <!--The min speed of every raindrop-->
        <attr name="raindrop_min_speed" format="float"></attr>

        <!--The max speed of every raindrop-->
        <attr name="raindrop_max_speed" format="float"></attr>

        <!--The slope of every raindrop-->
        <attr name="raindrop_slope" format="float"></attr>
    </declare-styleable>