Android 折叠工具栏-通过触摸禁用滚动
我想禁用折叠工具栏的触摸滚动行为。只有在由Android 折叠工具栏-通过触摸禁用滚动,android,android-recyclerview,android-collapsingtoolbarlayout,Android,Android Recyclerview,Android Collapsingtoolbarlayout,我想禁用折叠工具栏的触摸滚动行为。只有在由RecyclerView(正在工作)触发时,它才应该折叠。我想为什么不禁用焦点。。。 android:focusableInTouchMode=“false” 但它不起作用。我可以更改布局\u滚动标记,但是。。。 因此,我的问题是,是否有一个简单的解决办法 XML: <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.c
RecyclerView
(正在工作)触发时,它才应该折叠。我想为什么不禁用焦点。。。
android:focusableInTouchMode=“false”
但它不起作用。我可以更改布局\u滚动标记
,但是。。。
因此,我的问题是,是否有一个简单的解决办法
XML:
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/mCollapsingToolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="@dimen/header_size"
android:fitsSystemWindows="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
...
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="@+id/mToolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
...
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/mCollapsingToolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="@dimen/header_size"
android:fitsSystemWindows="true"
app:scrimAnimationDuration="300"
app:contentScrim="?attr/colorPrimary">
public class MainActivity extends AppCompatActivity {
private CollapsingToolbarLayout collapsingToolbarLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
collapsingToolbarLayout =
(CollapsingToolbarLayout) findViewById(R.id.mCollapsingToolbar);
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
if (rv.canScrollVertically(DOWN) || rv.canScrollVertically(UP)) {
controller.enableScroll();
} else {
controller.disableScroll();
}
}
}, 100);
}
private void enableScroll() {
final AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams)
collapsingToolbarLayout.getLayoutParams();
params.setScrollFlags(
AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL
| AppBarLayout.LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED
);
collapsingToolbarLayout.setLayoutParams(params);
}
private void disableScroll() {
final AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams)
collapsingToolbarLayout.getLayoutParams();
params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_NO_SCROLL);
collapsingToolbarLayout.setLayoutParams(params);
}
}
在此处找到了有效的解决方案:。 因此,现在只有当recyclerView中有足够的元素时,它才是可滚动的 XML:
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/mCollapsingToolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="@dimen/header_size"
android:fitsSystemWindows="true"
app:layout_scrollFlags="scroll|exitUntilCollapsed">
<ImageView
...
app:layout_collapseMode="parallax"/>
<android.support.v7.widget.Toolbar
android:id="@+id/mToolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
...
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/mCollapsingToolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="@dimen/header_size"
android:fitsSystemWindows="true"
app:scrimAnimationDuration="300"
app:contentScrim="?attr/colorPrimary">
public class MainActivity extends AppCompatActivity {
private CollapsingToolbarLayout collapsingToolbarLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
collapsingToolbarLayout =
(CollapsingToolbarLayout) findViewById(R.id.mCollapsingToolbar);
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
if (rv.canScrollVertically(DOWN) || rv.canScrollVertically(UP)) {
controller.enableScroll();
} else {
controller.disableScroll();
}
}
}, 100);
}
private void enableScroll() {
final AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams)
collapsingToolbarLayout.getLayoutParams();
params.setScrollFlags(
AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL
| AppBarLayout.LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED
);
collapsingToolbarLayout.setLayoutParams(params);
}
private void disableScroll() {
final AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams)
collapsingToolbarLayout.getLayoutParams();
params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_NO_SCROLL);
collapsingToolbarLayout.setLayoutParams(params);
}
}
PS:
findLastCompletelyVisibleItemPosition()
对于我的案例来说还不够。但我也用它。(查看下面的链接)
编辑:
如果要确保设置了正确的滚动状态,请在列表初始化(视图更新)后使用通知/事件(非定时更新)。否则,它可能会错误地设置滚动标志。而不是
params.setScrollFlags(0)代码>至参数setScrollFlags(AppBarLayout.LayoutParams.SCROLL\u FLAG\u NO\u SCROLL)代码>可读性比以前更好