谁有或可以提供更多相关信息？只是搜索了一半的网络，但找不到更多的东西，甚至没有来自谷歌的演示应用程序。
我怎样才能实现这些持久性 Bottom Sheets？
最佳答案
这里有一个很棒的教程，介绍如何仅使用 Android 库(包括 Android 支持库)来完成此操作:
https://questdot.com/android-persistent-and-modal-bottom-sheet-tutorial/
我会将代码复制并粘贴到此处以供后代使用。
在build.gradle中添加依赖:
compile 'com.android.support:design:25.1.1'
res/layout/custom_bottom_sheet_dialog.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/bottomSheetLayout"
android:layout_width="match_parent"
android:layout_height="300dp"
android:background="@android:color/holo_red_light"
android:padding="16dp"
app:behavior_peekHeight="60dp"
app:layout_behavior="@string/bottom_sheet_behavior">
<!-- app:behavior_hideable="true"-->
<TextView
android:id="@+id/bottomSheetHeading"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Any Title"
android:textAppearance="@android:style/TextAppearance.Large"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is Modal Bottom Sheet Dialog"
android:textAppearance="@android:style/TextAppearance.Large"
android:layout_below="@+id/bottomSheetHeading"
android:layout_centerHorizontal="true"
android:layout_marginTop="79dp" />
</RelativeLayout>
res/layout/content_bottom_sheet.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/bottomSheetLayout"
android:layout_width="match_parent"
android:layout_height="300dp"
android:background="@android:color/holo_blue_dark"
android:padding="16dp"
app:behavior_peekHeight="60dp"
app:layout_behavior="@string/bottom_sheet_behavior">
<TextView
android:id="@+id/bottomSheetHeading"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Expand Me"
android:textAppearance="@android:style/TextAppearance.Large"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is Persistent Bottom Sheet"
android:textAppearance="@android:style/TextAppearance.Large"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
</RelativeLayout>
res/layout/content_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.questdot.bottomsheetexample.MainActivity"
tools:showIn="@layout/activity_main">
<Button
android:id="@+id/show_bottom_sheet_dialog_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Show Modal Bottom Sheet" />
</RelativeLayout>
res/layout/activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
>
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
/>
</android.support.design.widget.AppBarLayout>
<include layout="@layout/content_main" />
<include layout="@layout/content_bottom_sheet" />
</android.support.design.widget.CoordinatorLayout>
CustomBottomSheetDialogFragment.java:
import android.os.Bundle;
import android.support.design.widget.BottomSheetDialogFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class CustomBottomSheetDialogFragment extends BottomSheetDialogFragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.custom_bottom_sheet_dialog, container, false);
return v;
}
}
主要 Activity .java:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private BottomSheetBehavior bottomSheetBehavior;
private Button showBottomSheetDialogButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
bottomSheetBehavior = BottomSheetBehavior.from(findViewById(R.id.bottomSheetLayout));
showBottomSheetDialogButton = (Button) findViewById(R.id.show_bottom_sheet_dialog_button);
showBottomSheetDialogButton.setOnClickListener(this);
bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
@Override
public void onStateChanged(View bottomSheet, int newState) {
if (newState == BottomSheetBehavior.STATE_EXPANDED) {
// bottomSheetHeading.setText(getString(R.string.text_collapse_me));
} else {
// bottomSheetHeading.setText(getString(R.string.text_expand_me));
}
switch (newState) {
case BottomSheetBehavior.STATE_COLLAPSED:
Log.e("Bottom Sheet Behaviour", "STATE_COLLAPSED");
break;
case BottomSheetBehavior.STATE_DRAGGING:
Log.e("Bottom Sheet Behaviour", "STATE_DRAGGING");
break;
case BottomSheetBehavior.STATE_EXPANDED:
Log.e("Bottom Sheet Behaviour", "STATE_EXPANDED");
break;
case BottomSheetBehavior.STATE_HIDDEN:
Log.e("Bottom Sheet Behaviour", "STATE_HIDDEN");
break;
case BottomSheetBehavior.STATE_SETTLING:
Log.e("Bottom Sheet Behaviour", "STATE_SETTLING");
break;
}
}
@Override
public void onSlide(View bottomSheet, float slideOffset) {
}
});
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.show_bottom_sheet_dialog_button:
new CustomBottomSheetDialogFragment().show(getSupportFragmentManager(), "Dialog");
break;
}
}
}
关于android - 如何从 Material Design 文档中实现持久性 Bottom Sheets，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32961529/