Sets the height of collapsed bottom sheet, by calling setPeekHeight() method

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In lasp example of BottomSheet, I implement a OnClickListener of background to expand and collapse the bottom sheet. Without this, user cannot expand the bottom sheet if collapsed, because bottom sheet have height of 0 by default. If you want you can set the height of collapsed bottom sheet, by calling setPeekHeight() method.

This video show how:


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);

bottomSheetBehavior.setPeekHeight(150);

/*
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) {

}
};
}



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