Implement BottomSheet of Android Design Support Library

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BottomSheet run on API 19

BottomSheet run on API 23
With the help from the Android Design Support Library, you can implement a number of important material design components to all developers and to all Android 2.1 or higher devices.

This example show how to implement Bottom Sheets with help of Android Design Support Library.




To use Design Support Library in your app, you have to "Add Android Design Support Library to Android Studio Project", currently version 'com.android.support:design:23.4.0'.


activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.blogspot.android_er.androidbottomsheet.MainActivity">

<LinearLayout
android:id="@+id/backgroundlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:autoLink="web"
android:text="http://android-er.blogspot.com/"
android:textStyle="bold" />
<TextView
android:id="@+id/textSDK"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/prompt"
android:textSize="28dp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>

<android.support.v4.widget.NestedScrollView
android:id="@+id/bottomsheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clipToPadding="true"
android:background="@android:color/darker_gray"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior">

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="Bottom Sheet Example"
android:textSize="26dp"
android:textStyle="bold"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@mipmap/ic_launcher"/>
</LinearLayout>

</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>


MainActivity.java
package com.blogspot.android_er.androidbottomsheet;

import android.os.Build;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomSheetBehavior;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

LinearLayout backgroundLayout;
View bottomSheet;
private BottomSheetBehavior bottomSheetBehavior;
TextView textPrompt;
TextView textSDK;

/*
Build.VERSION.SDK_INT:
The user-visible SDK version of the framework;
its possible values are defined in Build.VERSION_CODES.
https://developer.android.com/reference/android/os/Build.VERSION_CODES.html
*/
int sdk_int = Build.VERSION.SDK_INT;

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

textSDK = (TextView)findViewById(R.id.textSDK);
textSDK.setText("Running SDK_INT: " + sdk_int);

textPrompt = (TextView)findViewById(R.id.prompt);
backgroundLayout = (LinearLayout)findViewById(R.id.backgroundlayout);

bottomSheet = findViewById(R.id.bottomsheet);
bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);
bottomSheetBehavior.setBottomSheetCallback(bottomSheetCallback);

backgroundLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (bottomSheetBehavior.getState()){
case BottomSheetBehavior.STATE_COLLAPSED:
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
break;
case BottomSheetBehavior.STATE_EXPANDED:
bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
break;
}
}
});

}

BottomSheetBehavior.BottomSheetCallback bottomSheetCallback =
new BottomSheetBehavior.BottomSheetCallback(){
@Override
public void onStateChanged(@NonNull View bottomSheet, int newState) {
switch (newState){
case BottomSheetBehavior.STATE_COLLAPSED:
textPrompt.setText("COLLAPSED");
break;
case BottomSheetBehavior.STATE_DRAGGING:
textPrompt.setText("DRAGGING");
break;
case BottomSheetBehavior.STATE_EXPANDED:
textPrompt.setText("EXPANDED");
break;
case BottomSheetBehavior.STATE_HIDDEN:
textPrompt.setText("HIDDEN");
break;
case BottomSheetBehavior.STATE_SETTLING:
textPrompt.setText("SETTLING");
break;
default:
textPrompt.setText("unknown...");
}
}

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

}
};
}


(reference: http://android-developers.blogspot.hk/2016/02/android-support-library-232.html)

Next:
Sets the height of collapsed bottom sheet, by calling setPeekHeight() method
BottomSheetDialog example

~ More example of using Android Design Support Library, Snackbar, FloatingActionButton.

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