BottomSheetBehavior底部弹出的用法

需要的依赖: 

compile ‘com.android.support:appcompat-v7:23.2.1’ 

compile ‘com.android.support:design:23.2.1’ 

效果图如下: 



一直出现的问题是弹出窗口只显示部分,很烦人,浪费半个下午终于解决了 

下面看代码:

package com.example.mybottomdialog;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomSheetBehavior;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;

import com.example.mybottomdialog.adapter.Item;
import com.example.mybottomdialog.adapter.ItemAdapter;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

private Button btn_window;
View mBottomSheet;
BottomSheetBehavior mBehavior;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

btn_window = (Button) findViewById(R.id.btn_window);
mBottomSheet = findViewById(R.id.bottomSheet);

RecyclerView recyclerView = (RecyclerView) mBottomSheet.findViewById(R.id.recyclerview);
mBehavior = BottomSheetBehavior.from(mBottomSheet);

mBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
@Override
public void onStateChanged(@NonNull View bottomSheet, int newState) {

}

@Override
public void onSlide(@NonNull View bottomSheet, float slideOffset) {

}
});
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setHasFixedSize(true);
recyclerView.setAdapter(new ItemAdapter(createItems()));
btn_window.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mBehavior.getState() == BottomSheetBehavior.STATE_COLLAPSED) {
mBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
} else {
mBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
}
}
});
}

public List<Item> createItems() {
ArrayList<Item> items = new ArrayList<>();
items.add(new Item(R.drawable.f001, "开心"));
items.add(new Item(R.drawable.f002, "哈哈"));
items.add(new Item(R.drawable.f003, "爱你"));
items.add(new Item(R.drawable.f004, "汗"));
items.add(new Item(R.drawable.f005, "晕了"));
items.add(new Item(R.drawable.f006, "无语"));
items.add(new Item(R.drawable.f007, "呵呵"));
items.add(new Item(R.drawable.f008, "日"));
return items;
}

/*  private void showBottomSheetDialog() {
BottomSheetDialog bottomSheetDialog = new BottomSheetDialog(MainActivity.this);
View view = getLayoutInflater().inflate(R.layout.sheet, null);
RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
recyclerView.setAdapter(new ItemAdapter(createItems()));
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getParent()));
bottomSheetDialog.setContentView(view);
bottomSheetDialog.show();
}*/
}

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activity_main.xml布局文件

<?xml version="1.0" encoding="utf-8"?>
<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"
android:fitsSystemWindows="true"
tools:context=".MainActivity">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dp"
android:gravity="center"
android:orientation="vertical">

<Button
android:id="@+id/btn_window"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="显示底部弹出窗口" />

</LinearLayout>

<LinearLayout
android:id="@+id/bottomSheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="@android:color/white"
android:elevation="4dp"
android:orientation="vertical"
app:behavior_hideable="true"
app:behavior_peekHeight="0dp"
app:layout_behavior="@string/bottom_sheet_behavior"
tools:ignore="UnusedAttribute">

<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff" />

</LinearLayout>

</android.support.design.widget.CoordinatorLayout>

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相关Adpter

package com.example.mybottomdialog.adapter;

import android.support.annotation.DrawableRes;

public class Item {

private int mDrawableRes;

private String mTitle;

public Item(@DrawableRes int drawable, String title) {
mDrawableRes = drawable;
mTitle = title;
}

public int getDrawableResource() {
return mDrawableRes;
}

public String getTitle() {
return mTitle;
}

}

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package com.example.mybottomdialog.adapter;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.mybottomdialog.R;

import java.util.List;

public class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.ViewHolder> {

private List<Item> mItems;

public ItemAdapter(List<Item> items) {
mItems = items;
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new ViewHolder(LayoutInflater.from(parent.getContext())
.inflate(R.layout.item, parent, false));
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.setData(mItems.get(position));
}

@Override
public int getItemCount() {
return mItems.size();
}

public class ViewHolder extends RecyclerView.ViewHolder {

public ImageView imageView;
public TextView textView;
public Item item;

public ViewHolder(View itemView) {
super(itemView);
imageView = (ImageView) itemView.findViewById(R.id.imageView);
textView = (TextView) itemView.findViewById(R.id.textView);
}

public void setData(Item item) {
this.item = item;
imageView.setImageResource(item.getDrawableResource());
textView.setText(item.getTitle());
}

}
}

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styles.xml格式文件,这个很有用

<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>

<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
</resources>

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item.xml文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clickable="true">

<android.support.v7.widget.AppCompatImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/f008" />

<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:text="xx"
android:textSize="20dp" />

</RelativeLayout>

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哈哈哈,搞定了,懒得废话!代码是学coding的最好老师!

以上代码全部直接复制粘贴就可以使用，下面再给出我写的一个Demo，包含头部和底部的，加深使用的理解：
http://download.csdn.net/download/wanxuedong/10119837