이 예는 Android에서 scrollView의 끝을 감지하는 방법을 보여줍니다.
1단계 − Android Studio에서 새 프로젝트를 생성하고 파일 ⇒ 새 프로젝트로 이동하여 필요한 모든 세부 정보를 입력하여 새 프로젝트를 생성합니다.
2단계 − res/layout/activity_main.xml에 다음 코드를 추가합니다.
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android" xmlns:tools="https://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <ScrollView android:id="@+id/scrollView" android:layout_width="match_parent" android:layout_height="match_parent"> <WebView android:id="@+id/webView" android:layout_width="match_parent" android:layout_height="wrap_content"> </WebView> </ScrollView> </RelativeLayout>
3단계 − src/MainActivity.java
에 다음 코드 추가import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver;
import android.webkit.WebView;
import android.widget.ScrollView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity implements View.OnTouchListener,
ViewTreeObserver.OnScrollChangedListener {
ScrollView scrollView;
WebView webView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
scrollView = findViewById(R.id.scrollView);
webView = findViewById(R.id.webView);
scrollView.setOnTouchListener(this);
scrollView.getViewTreeObserver().addOnScrollChangedListener(this);
webView.loadData(getResources().getString(R.string.sample_data), "text/html", null);
}
public void onScrollChanged(){
View view = scrollView.getChildAt(scrollView.getChildCount() - 1);
int topDetector = scrollView.getScrollY();
int bottomDetector = view.getBottom() - (scrollView.getHeight() + scrollView.getScrollY());
if(bottomDetector == 0 ){
Toast.makeText(getBaseContext(),"Scroll View bottom reached",Toast.LENGTH_SHORT).show();
}
if(topDetector <= 0){
Toast.makeText(getBaseContext(),"Scroll View top reached",Toast.LENGTH_SHORT).show();
}
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return false;
}
} 4단계 – res/values/strings.xml을 열고 다음 코드를 추가하십시오. -
<resources>
<string name="app_name">Sample</string>
<string name="sample_data">
<![CDATA[<html>]]>
<![CDATA[<style>]]>
p.small {
line-height: 1.5;
font-size: 12px;
}
<![CDATA[</style>]]>
<![CDATA[<body><p align="justify" class="small">]]>
Chupa chups carrot cake pastry cupcake caramels sugar plum chocolate cupcake tootsie roll.
Cupcake chocolate donut caramels sesame snaps brownie cake halvah.
Sesame snaps sesame snaps gummies candy carrot cake.
Fruitcake bonbon liquorice topping biscuit candy canes fruitcake marzipan cake.
Tart tootsie roll tart gummi bears apple pie danish powder pastry gummies.
Tiramisu sesame snaps icing pudding. Marzipan sweet roll cookie marshmallow.
Tiramisu bear claw bear claw sesame snaps pie marzipan.
Icing candy candy canes danish. Tart lollipop jujubes cake soufflé.
Cheesecake bear claw marshmallow chocolate cake donut sweet.
Tootsie roll topping chocolate bar cupcake cake oat cake oat cake bonbon cotton candy.
Jelly-o croissant dragée lemon drops chocolate bar. Gingerbread cotton candy oat cake marshmallow.
<![CDATA[<br><br>]]>
Lemon drops carrot cake wafer jelly cheesecake chocolate cake gingerbread.
Dessert cookie oat cake pie. Liquorice liquorice dragée lollipop danish jujubes pudding carrot cake.
Jelly beans cotton candy sweet caramels gummies pastry. Wafer wafer muffin sweet roll.
Chocolate topping gummi bears gummies. Oat cake bonbon brownie chocolate bar.
Tart tart gingerbread chupa chups chocolate bar gummies. C
0roissant oat cake ice cream liquorice tootsie roll. Pudding wafer gummies.
Apple pie marshmallow chupa chups. Cookie cheesecake carrot cake jelly beans tiramisu lemon drops.
Bonbon sweet roll wafer.
<![CDATA[<br><br>]]>
Lemon drops muffin bear claw cake gingerbread apple pie lollipop cheesecake.
Powder bear claw marshmallow. Tootsie roll gummi bears wafer brownie.
Sesame snaps soufflé bear claw chocolate danish candy.
Wafer oat cake ice cream pastry cake muffin toffee tootsie roll. Cake oat cake marshmallow.
Gummi bears gingerbread cake danish muffin marzipan donut cotton candy.
Ice cream topping cake candy gummi bears brownie. Marshmallow chocolate icing candy canes topping.
Pastry gummies powder sesame snaps sugar plum sugar plum.
Lemon drops gummies gummi bears tootsie roll powder jelly-o jelly-o.
Lollipop jujubes sweet brownie croissant soufflé chupa chups bear claw.
Sugar plum sugar plum lollipop croissant lemon drops sweet jujubes soufflé sweet roll.
<![CDATA[<br><br>]]>
Liquorice jelly-o candy lollipop croissant sweet icing brownie biscuit.
Wafer dessert cake marzipan gummies jujubes bonbon tootsie roll ice cream.
Chocolate bar bear claw candy canes lemon drops jelly apple pie cotton candy jujubes.
Donut toffee candy canes dragée cake toffee. Icing cookie biscuit cheesecake dragée.
Gummi bears tiramisu sesame snaps muffin halvah. Sweet jujubes chocolate cake muffin pie bonbon cupcake.
Pastry jujubes pastry fruitcake. Jelly beans dessert gingerbread cupcake gingerbread marshmallow carrot cake.
Macaroon carrot cake candy canes jelly powder. Soufflé macaroon liquorice candy canes lollipop.
Marzipan fruitcake fruitcake gummi bears gummies chocolate cake. Jelly sesame snaps topping sweet.
<![CDATA[<br><br>]]>
Chupa chups macaroon muffin. Topping jujubes biscuit tart jujubes pudding.
Brownie oat cake cookie. Lemon drops pudding tiramisu dessert marzipan.
Danish cake candy canes bonbon. Gummi bears carrot cake apple pie lollipop.
Tart candy canes chocolate cake lemon drops carrot cake topping cheesecake apple pie cake.
Bear claw pudding macaroon croissant halvah caramels.
Danish cake pastry sugar plum lollipop ice cream gummi bears gummi bears sugar plum.
Chocolate macaroon tootsie roll. Halvah tootsie roll sweet roll powder gummi bears chocolate cake.
Sugar plum gingerbread brownie. Wafer chocolate cake bonbon ice cream biscuit dragée tiramisu croissant apple pie.
<![CDATA[</p></body></html>]]>
</string>
</resources> 4단계 – androidManifest.xml에 다음 코드 추가
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="https://schemas.android.com/apk/res/android" package="app.com.sample"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
응용 프로그램을 실행해 보겠습니다. 실제 Android 모바일 장치를 컴퓨터에 연결했다고 가정합니다. Android 스튜디오에서 앱을 실행하려면 프로젝트의 활동 파일 중 하나를 열고 도구 모음에서 실행 아이콘을 클릭합니다. 모바일 장치를 옵션으로 선택한 다음 기본 화면을 표시할 모바일 장치를 확인하십시오 –
