Java file

package com.mfa.coba_midtrans;

import android.media.Image;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;

public class Coba extends AppCompatActivity {

    ImageView arrow;
    LinearLayout layout;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.coba_activity);

        arrow = (ImageView) findViewById(R.id.arrow_to);
        layout = (LinearLayout) findViewById(R.id.layout);

        arrow.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(layout.getVisibility() == View.GONE){
                    arrow.setImageResource(R.drawable.ic_keyboard_arrow_up);
                    layout.setVisibility(View.VISIBLE);
                }else {
                    arrow.setImageResource(R.drawable.ic_keyboard_arrow_down_black_24dp);
                    layout.setVisibility(View.GONE);
                }
            }
        });
    }
}