關於material-menu

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（轉）http://www.jcodecraeer.com/a/opensource/2014/1202/2093.html

介绍：

Android L drawer指示图标的动画效果，该库提供了两种对MaterialMenuDrawable封装，可以方便的应用到actionbar、NavigationDrawer 以及任意的自定义layout中。

运行效果：

使用说明：

MaterialMenuView

绘制icon的view，提供了一些改变其状态的方法，同时还可以通过下列属性自定义：

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app:mm_color="color"              // Color of drawable
app:mm_transformDuration="integer"// Transformation animation duration
app:mm_pressedDuration="integer"  // Pressed circle animation duration
app:mm_scale="integer"            // Scale factor of drawable
app:mm_strokeWidth="integer"      // Stroke width of icons (can only be 1, 2 or 3)
app:mm_rtlEnabled="boolean"       // Enabled RTL layout support (flips all drawables)

MaterialMenuIcon

取代ActionBar icon的控件

api

MaterialMenu共有四种状态

BURGER, ARROW, X, CHECK

改变drawable state 带有动画并且有圆形按下的效果：

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MaterialMenu.animatePressedState(IconState state)

改变drawable state 带有动画，但没有圆形按下效果

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MaterialMenu.animateState(IconState state)

不带任何效果：

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MaterialMenu.setState(IconState state)

主动触发动画效果：

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MaterialMenu.setTransformationOffset(AnimationState state, float value)

其中AnimationState可以为BURGER_ARROW, BURGER_X, ARROW_X, ARROW_CHECK, BURGER_CHECK, X_CHECK ，value在0到2之间。

自定义

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// change color
MaterialMenu.setColor(int color)
// change transformation animation duration
MaterialMenu.setTransformationDuration(int duration)
// change pressed animation duration
MaterialMenu.setPressedDuration(int duration)
// change transformation interpolator
MaterialMenu.setInterpolator(Interpolator interpolator)
// set RTL layout support
MaterialMenu.setRTLEnabled(boolean enabled)

actionbar中的运用

取决于你用的是何种actionbar，不同的actionbar使用不同的MaterialMenuIcon，分别是： MaterialMenuIcon, MaterialMenuIconCompat 和MaterialMenuIconSherlock

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protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    materialMenu = newMaterialMenuIcon(this, Color.WHITE, Stroke.THIN);
}
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    materialMenu.syncState(savedInstanceState);
}
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    materialMenu.onSaveInstanceState(outState);
}
public boolean onOptionsItemSelected(MenuItem item) {
    if(item.getId() == android.R.id.home) {
        // Handle your drawable state here
        materialMenu.animatePressedState(newState);
    }
}

在ToolBar中

完全把它当作一个标准的drawable来用，不过你需要自己处理icon state

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private MaterialMenuDrawable materialMenu;
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.toolbar);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    toolbar.setNavigationOnClickListener(newView.OnClickListener() {
        @Override public void onClick(View v) {
        // Handle your drawable state here
        materialMenu.animatePressedState(newState);
        }
    });
    materialMenu = newMaterialMenuDrawable(this, Color.WHITE, Stroke.THIN);
    toolbar.setNavigationIcon(materialMenu);
    materialMenu.setNeverDrawTouch(true);
}

或者MaterialMenuIconToolbar

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private MaterialMenuIconToolbar materialMenu;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.toolbar);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    toolbar.setNavigationOnClickListener(newView.OnClickListener() {
        @Override public void onClick(View v) {
        // Handle your drawable state here
        materialMenu.animatePressedState(newState);
        }
    });
    materialMenu = newMaterialMenuIconToolbar(this, Color.WHITE, Stroke.THIN) {
        @Override public int getToolbarViewId() {
            returnR.id.toolbar;
        }
    };
    materialMenu.setNeverDrawTouch(true);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    materialMenu.syncState(savedInstanceState);
}
@Override protected void onSaveInstanceState(Bundle outState) {
    materialMenu.onSaveInstanceState(outState);
    super.onSaveInstanceState(outState);
}

在自定义的布局中

直接将MaterialMenuView添加到布局中，注册一个OnClickListener处理icon的变换。

详细使用请查看 source of Demo

与NavigationDrawer 的交互

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private DrawerLayout drawerLayout;
private boolean      isDrawerOpened;
private MaterialMenuIcon materialMenu;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    materialMenu = newMaterialMenuIcon(this, Color.WHITE, Stroke.THIN); // or retrieve from your custom view, etc
    drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawerLayout.setDrawerListener(newDrawerLayout.SimpleDrawerListener() {
        @Override
        public void onDrawerSlide(View drawerView, float slideOffset) {
            materialMenu.setTransformationOffset(
                MaterialMenuDrawable.AnimationState.BURGER_ARROW,
                isDrawerOpened ? 2 - slideOffset : slideOffset
            );
        }
        @Override
        public void onDrawerOpened(View drawerView) {
            isDrawerOpened = true;
        }
        @Override
        public void onDrawerClosed(View drawerView) {
            isDrawerOpened = false;
        }
        @Override
        public void onDrawerStateChanged(int newState) {
            if(newState == DrawerLayout.STATE_IDLE) {
                if(isDrawerOpened) menu.setState(MaterialMenuDrawable.IconState.ARROW)
                elsemenu.setState(MaterialMenuDrawable.IconState.BURGER)
            }
        }
    });
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    isDrawerOpened = drawerLayout.isDrawerOpen(Gravity.START); // or END, LEFT, RIGHT
    materialMenu.syncState(savedInstanceState);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    materialMenu.onSaveInstanceState(outState);
}

Circle pressed state

为了让本库的圆形按下效果起作用，你必须先屏蔽了actionbar本身的背景：

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<style name="AppTheme"parent="android:Theme.Holo.Light.DarkActionBar">
    <item name="android:actionBarItemBackground">@null</item>
    <item name="android:actionButtonStyle">@style/ActionButtonStyle</item>
    <item name="android:actionOverflowButtonStyle">@style/OverflowButtonStyle</item>
</style>
<style name="ActionButtonStyle"parent="android:Widget.Holo.ActionButton">
    <item name="android:background">@drawable/action_bar_item_background</item>
</style>
<style name="OverflowButtonStyle"parent="android:Widget.Holo.ActionButton.Overflow">
    <item name="android:background">@drawable/action_bar_item_background</item>
</style>

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