ToolbarPanel 一個可以下滑顯示出一個面板的Toolbar。這個library受Drawerlayout的啟發，但有別于Drawerlayout顯示左右抽屜，這個library會提供下拉toolbar顯示一個面板的功能。

Usage

To use it you need to implementToolbarPanelLayoutas your root layout :

<com.nikoyuwono.toolbarpanel.ToolbarPanelLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/sliding_down_toolbar_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:panelId="@+id/panel"
    app:toolbarId="@+id/toolbar">

    <RelativeLayout
        android:id="@+id/content_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        //Your content here
    </RelativeLayout>

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/color_primary" />

    <RelativeLayout
        android:id="@+id/panel"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        //Your panel content here
    </RelativeLayout>
</com.nikoyuwono.toolbarpanel.ToolbarPanelLayout>

The key is to setpanelIdandtoolbarIdtoToolbarPanelLayoutso it can decide where to draw the panel

To open and close panel programatically you can call

ToolbarPanelLayout.openPanel(); // Open the panel
ToolbarPanelLayout.closePanel(); // Close the panel

And to lock the panel you can useToolbarPanelLayout.setLockMode(int lockMode);which support 3 Mode :

/**
 * The drawer is unlocked.
 */
public static final int LOCK_MODE_UNLOCKED = 0;

/**
 * The drawer is locked closed. The user may not open it, though the app may open it
 * programmatically.
 */
public static final int LOCK_MODE_LOCKED_CLOSED = 1;

/**
 * The drawer is locked open. The user may not close it, though the app may close it
 * programmatically.
 */
public static final int LOCK_MODE_LOCKED_OPEN = 2;

You can also set listener to theToolbarPanelLayoutwithToolbarPanelListenerwhich supported 3 events for now :

/**
 * Called when a panel's position changes.
 */
public void onPanelSlide(Toolbar toolbar, View panelView, float slideOffset);

/**
 * Called when a panel has settled in a completely open state.
 * The panel is interactive at this point.
 */
public void onPanelOpened(Toolbar toolbar, View panelView);

/**
 * Called when a panel has settled in a completely closed state.
 */
public void onPanelClosed(Toolbar toolbar, View panelView);

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