标题说明了一切。我想要做的就是知道导航抽屉是否打开。我在网上搜索了很多，找到了方法isDrawerOpen(int drawerGravity)但是找不到一个令人满意的答案来解释如何在方法中使用它。如果有人向我解释，我将不胜感激。
提前致谢！
【问题讨论】：
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList)。 mDrawerLayout 是抽屉，mDrawerList 是列表视图
标签： android android-navigation
假设你已经在 xml 中定义了一个抽屉布局：
DrawerLayout mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
...
if(mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
//drawer is open
}
【讨论】：
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerToggle = new ActionBarDrawerToggle(
this, /* host Activity */
mDrawerLayout, /* DrawerLayout object */
R.drawable.ic_drawer, /* nav drawer icon to replace 'Up' caret */
R.string.drawer_open, /* "open drawer" description */
R.string.drawer_close /* "close drawer" description */
) {
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getActionBar().setTitle(mTitle);
}
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getActionBar().setTitle(mDrawerTitle);
}
};
// Set the drawer toggle as the DrawerListener
mDrawerLayout.setDrawerListener(mDrawerToggle);
那个听众使用:)
【讨论】：
用途：
mDrawerLayout.isDrawerOpen()方法
例子：
if(mDrawerLayout.isDrawerOpen(GravityCompat.START)) {
mDrawerLayout.closeDrawer(Gravity.LEFT); //CLOSE Nav Drawer!
}else{
mDrawerLayout.openDrawer(Gravity.LEFT); //OPEN Nav Drawer!
}
【讨论】：
通过以下方式可以发现Drawer是打开还是关闭..
public class YourActivity extends AppCompatActivity implements DrawerLayout.DrawerListener {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dash_board);
DrawerLayout drawer=(DrawerLayout)findViewById(R.id.container);
drawer.setDrawerListener(this);
}//onCreate()
@Override
public void onDrawerOpened(View arg0) {
//write your code
}
@Override
public void onDrawerClosed(View arg0) {
//write your code
}
@Override
public void onDrawerSlide(View arg0, float arg1) {
//write your code
}
@Override
public void onDrawerStateChanged(int arg0) {
//write your code
}
}//class
【讨论】：
检测DrawerLayout打开、关闭、滑动DrawerLayout.DrawerListener
DrawerLayout drawerLayout:
drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
/**
* Called when a drawer's position changes.
*
* @param slideOffset The new offset of this drawer within its range, from 0-1
* Example when you slide drawer from left to right, slideOffset will increase from 0 - 1 (0 when drawer closed and 1 when drawer display full)
*/
@Override
public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
}
@Override
public void onDrawerOpened(@NonNull View drawerView) {
// do something when drawer opened
}
@Override
public void onDrawerClosed(@NonNull View drawerView) {
// do something when drawer closed
}
/**
* Called when the drawer motion state changes. The new state will
* be one of {@link #STATE_IDLE}, {@link #STATE_DRAGGING} or {@link #STATE_SETTLING}.
*/
@Override
public void onDrawerStateChanged(int newState) {
}
});
检查抽屉是否打开
if(drawerLayout.isDrawerOpen(GravityCompat.START)) // or GravityCompat.END
【讨论】：
shakeJ 的回答是正确的，记住你可以使用 onDrawerSlide 来触发其他功能...例如我用它来更改状态栏颜色。
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
isOpen = false;
}
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
isOpen = true;
}
public void onDrawerSlide(View drawerView,float slideOffset){
super.onDrawerSlide(drawerView,slideOffset);
if(!isOpen){
setStatusBarColor("#00102b");
}
if(isOpen){
setStatusBarColor("#EFEFF0");
}
}
【讨论】：
可能是，我迟到了，但我可以分享新的更新信息。
在给定的代码中，我在 onclick 函数中设置了打开/关闭抽屉。如果抽屉是打开的，它将被关闭，否则打开。这个解决方案基于 RXava DrawerLayout (androidx.drawerlayout.widget.DrawerLayout)。
在我的代码中，我从右到左打开抽屉布局。
@Override
public void onClick(View view) {
if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
drawerLayout.closeDrawer(GravityCompat.END);
}else {
drawerLayout.openDrawer(GravityCompat.END);
}
}
注意：如果您从右侧打开抽屉布局，请使用 "GravityCompat.END"，并且它是从左侧打开的，而不是使用 "GravityCompat.START"。 享受编码......
【讨论】：
在 Kotlin 中方法是一样的。
初始化DrawerLayout 视图
val drawerLayout: DrawerLayout = findViewById(R.id.drawer_layout)
检查抽屉是否打开
if(drawerLayout.isDrawerOpen(GravityCompat.START)){
Log.d("Drawer","open")
}
如果您想在抽屉打开或关闭时自动执行操作，您可以执行以下操作。
在您的主要活动中，创建一个作为DrawerLayout.DrawerListener 子类的内部类。 DrawerLayout 类实现了 DrawerListener 接口。
inner class CustomDrawer : DrawerLayout.DrawerListener{
override fun onDrawerStateChanged(newState: Int) {
}
override fun onDrawerSlide(drawerView: View, slideOffset: Float) {
imm.hideSoftInputFromWindow(drawerView?.getWindowToken(), 0)
}
override fun onDrawerClosed(drawerView: View) {
imm.hideSoftInputFromWindow(drawerView?.getWindowToken(), 0)
}
override fun onDrawerOpened(drawerView: View) {
imm.hideSoftInputFromWindow(drawerView?.getWindowToken(), 0)
}
}
将您的操作放入您要使用的功能中。在我的示例中，如果用户与导航抽屉交互，我将关闭软键盘。在你的主要活动中像这样声明 InputMethodManager：
var imm: InputMethodManager = this.getSystemService(Activity.INPUT_METHOD_SERVICE)
将你的自定义 DrawerListener 添加到 DrawerLayout（我把它放在 onCreate 方法中）
var drawerListener = CustomDrawer()
drawerLayout.addDrawerListener(drawerListener)
【讨论】：