Android - Simple Touch Gesture

Submitted by razormist on Wednesday, February 14, 2018 - 22:17.

Operating System

In this tutorial we will try to create a Simple Touch Gesture using Android. This is simple application can be used to any apps that needed to detect touch movement to call any functions. Android is a mobile operating system developed by Google. It used in several gadget like smartphone, tablet, and even television. Android is open source to developers who has an interest in developing mobile apps. It also provide an adaptive framework that allow the developer to develop an apps in a simpler way. So now let's do the coding.....

Getting Started:

First you will have to download & install the Android Development IDE (Android Studio or Eclipse). Android Studio is an open source development feel free to develop your things. Here's the link for the Android Studio https://developer.android.com/studio/index.html.

Layout Design

We will now create the design for the application, first locate the layout file called activity_main.xml, this is the default name when create a new activity. Then write these codes inside your layout file.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.razormist.simpletouchgestures.MainActivity">
 
    <TextView
        android:id="@+id/tv_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Touch Gesture"
        android:layout_centerHorizontal="true"
        android:textSize="50sp"
        android:layout_marginTop="30dp"
        android:textColor="#000"/>
 
    <TextView
        android:id="@+id/tv_result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Result Here..."
        android:layout_centerInParent="true"
        android:textSize="30dp"/>
 
</RelativeLayout>

Android Manifest File

The Android Manifest file provides essential information about your app to the Android system in which the system must required before running the code. It describe the overall information about the application. It contains some libraries that needed to access the several method within the app.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.razormist.simpletouchgestures">
 
    <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"
            android:configChanges="orientation"
            android:screenOrientation="portrait">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

The Main Function

This code contains the main function of the application. This code will detect any touch method within the class. To start with first locate your MainActivity java file and open it, then then add this remote services by casting implements in the MainActivity

implements OnGestureListener, OnDoubleTapListener

After that write this variable inside the MainActivity class

private static TextView tv_result;
private GestureDetectorCompat gestureDetectorCompat;

Then write these several method inside the activity class to make the apps work properly.

@Override
    public boolean onTouchEvent(MotionEvent event) {
        gestureDetectorCompat.onTouchEvent(event);
        return super.onTouchEvent(event);
    }
 
    @Override
    public boolean onSingleTapConfirmed(MotionEvent e) {
        tv_result.setText("OnSingleTap");
        tv_result.setTextColor(Color.rgb(255, 0, 0));
        return false;
    }
 
    @Override
    public boolean onDoubleTap(MotionEvent e) {
        tv_result.setText("OnDoubleTap");
        tv_result.setTextColor(Color.rgb(255, 0, 127));
        return false;
    }
 
    @Override
    public boolean onDoubleTapEvent(MotionEvent e) {
        tv_result.setText("OnDoubleTapEvent");
        tv_result.setTextColor(Color.rgb(102, 0, 51));
        return false;
    }
 
    @Override
    public boolean onDown(MotionEvent e) {
        tv_result.setText("OnDown");
        tv_result.setTextColor(Color.rgb(76, 153, 0));
        return false;
    }
 
    @Override
    public void onShowPress(MotionEvent e) {
        tv_result.setText("OnShowPress");
        tv_result.setTextColor(Color.rgb(255, 255, 51));
    }
 
    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        tv_result.setText("OnSingleTapUp");
        tv_result.setTextColor(Color.rgb(255, 255, 0));
        return false;
    }
 
    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
        tv_result.setText("OnScroll");
        tv_result.setTextColor(Color.rgb(0, 0, 255));
        return false;
    }
 
    @Override
    public void onLongPress(MotionEvent e) {
        tv_result.setText("OnLongPress");
        tv_result.setTextColor(Color.rgb(102, 0, 204));
    }
 
    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
        tv_result.setText("OnFling");
        tv_result.setTextColor(Color.rgb(102, 178, 255));
        return false;
    }

Finally, initialize all the methods inside the onCreate method to run the application.

tv_result = (TextView)findViewById(R.id.tv_result);
gestureDetectorCompat = new GestureDetectorCompat(this, this);
gestureDetectorCompat.setOnDoubleTapListener(this);

Try to run the app and see if it worked. There you have it we have created a Simple Touch Gesture using Android. I hope that this tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!!!

Note: Due to the size or complexity of this submission, the author has submitted it as a .zip file to shorten your download time. After downloading it, you will need a program like Winzip to decompress it.

Virus note: All files are scanned once-a-day by SourceCodester.com for viruses, but new viruses come out every day, so no prevention program can catch 100% of them.

FOR YOUR OWN SAFETY, PLEASE:

1. Re-scan downloaded files using your personal virus checker before using it.
2. NEVER, EVER run compiled files (.exe's, .ocx's, .dll's etc.)--only run source code.

Add new comment

353 views