Skip to main content

Using Fling Motion Gesture in Android

 

The layout .

I’m using the ViewFlipper to demonstrate this simple fling application.

So, what is Fling… It’s also known as the swiping action on your mobile device screen.

In this demo, I prepared an Activity with ViewFlipper layout that has 3 screens. Green, Blue and Yellow.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <TableLayout android:id="@+id/LinearLayout01" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content">
        <TableRow>
            <TextView android:id="@+id/btnback"
                android:text="Fling left - Back  "
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"/>
            <TextView android:id="@+id/btnforward"
                android:text="  Fling right - Forward"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"/>
        </TableRow>
    </TableLayout>
    <ViewFlipper
        android:id="@+id/pages"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >
        <TextView
            android:text="1.red"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:background="#AAff0000" />
        <TextView
            android:text="2.green"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent" 
            android:background="#AA00ff00" />
        <TextView
            android:text="3.blue"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:background="#AA0000ff"  />
    
    </ViewFlipper>
</LinearLayout>


The Code…



package com.kerul.FlipperFling;
import android.app.Activity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.GestureDetector.OnGestureListener;
import android.widget.Toast;
import android.widget.ViewFlipper;
public class FlipperFling extends Activity implements OnGestureListener {
	protected GestureDetector gestureScanner;
	protected ViewFlipper vf;
	private static final int SWIPE_MIN_DISTANCE = 120;
    private static final int SWIPE_MAX_OFF_PATH = 250;
    private static final int SWIPE_THRESHOLD_VELOCITY = 200;
	@Override
	public void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);
		gestureScanner = new GestureDetector(this);
		setContentView(R.layout.main);
        vf = (ViewFlipper) findViewById(R.id.pages);
	}
	@Override
	public boolean onTouchEvent(MotionEvent me){
		return gestureScanner.onTouchEvent(me);
	}
	public boolean onDown(MotionEvent e){
		return true;
	}
	public boolean onFling(MotionEvent e1,MotionEvent e2,float velocityX,float velocityY){
		try {
            if(e1.getX() > e2.getX() && Math.abs(e1.getX() - e2.getX()) > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                Toast.makeText(this.getApplicationContext(), "Left", Toast.LENGTH_SHORT).show();
                vf.showPrevious();
            }else if (e1.getX() < e2.getX() && e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
                Toast.makeText(this.getApplicationContext(), "Right", Toast.LENGTH_SHORT).show();
                vf.showNext();
            }
        } catch (Exception e) {
            // nothing
        }
        return true;
		
	}
	public void onLongPress(MotionEvent e){}
	
	public boolean onScroll(MotionEvent e1,MotionEvent e2,float distanceX,float distanceY){
		return true;
	}
	public void onShowPress(MotionEvent e){}
	public boolean onSingleTapUp(MotionEvent e){ return true;}
}


Focus on onFling method, the fling gesture is detected in the method. (I’ll explain later…).



The onFling method (which is the method detecting the Fling motion will catch a horizontal swipe, either from left to right, or from right to left). Assuming that MotionEvent.e1 is the starting point of the motion, and MotionEvent.e2 is the end. FYI the screen coordinate (0,0) starts from the top-left corner.  So left to right motion detected when the e1.getX is greater than e2.getX, and vice-versa.

Comments

Popular posts from this blog

Several English proverbs and the Malay pair

Or you could download here for the Malay proverbs app – https://play.google.com/store/apps/details?id=net.kerul.peribahasa English proverbs and the Malay pair Corpus Reference: Amir Muslim, 2009. Peribahasa dan ungkapan Inggeris-Melayu. DBP, Kuala Lumpur http://books.google.com.my/books/about/Peribahasa_dan_ungkapan_Inggeris_Melayu.html?id=bgwwQwAACAAJ CTRL+F to search Proverbs in English Definition in English Similar Malay Proverbs Definition in Malay 1 Where there is a country, there are people. A country must have people. Ada air adalah ikan. Ada negeri adalah rakyatnya. 2 Dry bread at home is better than roast meat home's the best hujan emas di negeri orang,hujan batu di negeri sendiri Betapa baik pun tempat orang, baik lagi tempat sendiri. 3 There's no accounting for tastes We can't assume that every people have a same feel Kepala sama hitam hati lain-lain. Dalam kehidupan ini, setiap insan berbeza cara, kesukaan, perangai, tabia

Bootstrap Template for PHP database system - MyCompanyHR

HTML without framework is dull. Doing hard-coded CSS and JS are quite difficult with no promising result on cross platform compatibility. So I decided to explore BootStrap as they said it is the most popular web framework. What is BootStrap? - Bootstrap is the most popular HTML, CSS, and JavaScript framework for developing responsive, mobile-first web sites. (  http://www.w3schools.com/bootstrap/   ) Available here -  http://getbootstrap.com/ Why you need Flat-UI? Seems like a beautiful theme to make my site look professional. Anyway you could get variety of BootStrap theme out there, feel free to select here  http://bootstraphero.com/the-big-badass-list-of-twitter-bootstrap-resources/ Flat-UI is from DesignModo -   http://designmodo.com/flat/ Web Programming MyCompanyHR – PHP & MySQL mini project (with Boostrap HTML framework) Template 1: Template for the Lab Exercise. This is a project sample of a staff record management system. It has the PHP structured co

Keperluan untuk pemasangan Joomla! 1.7 pada komputer anda

Eksperimen ini akan memasang perisian keperluan sebelum anda memasang Joomla!. Perisian yang diperlukan ialah XAMPP1.7.4 (versi Windows)*. Projek ini dilakukan pada Windows 7. LANGKAH 1: Muat turun XAMPP Memandangkan XAMPP telah membuat kompilasi semua keperluan di atas (pelayan web Apache, penterjemah PHP dan pelayan pangkalan data MySQL), jadi anda cuma perlu muat turun XAMPP dari laman web berikut; http://www.apachefriends.org/en/xampp-windows.html

Contact Us at blog.kerul.net

Powered by EMF HTML Contact Form

Simple Calculator with Spinner – Android Code

This code is a simple code for Android application. It has two textboxes to receive two numbers (decimal), list of mathematical operations with +, –, * and /. Choose the operation, and hit the “Display result” button. You will see the answer to the at the bottom of the button. Have fun with Android.   The Manifest file <? xml version="1.0" encoding="utf-8" ?> < LinearLayout xmlns : android = "http://schemas.android.com/apk/res/android" android : orientation = "vertical" android : layout_width = "fill_parent" android : layout_height = "fill_parent" > < EditText android : text = "@+id/EditText01" android : id = "@+id/EditText01" android : layout_width = "fill_parent" android : layout_height = "wrap_content" > </ EditText > < EditText android : text = "@+id/EditText02" android : id = "@+id/EditText02"