How to get the touch position on android device?

AndroidApps/ApplicationsMobile Development

This example demonstrates about how do I get the touch position on android device.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context="MainActivity">
   <EditText
      android:layout_width="400dp"
      android:layout_height="wrap_content"
      android:id="@+id/editText"
      android:hint="Points on X-Axis" />
   <EditText
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/editText2"
      android:layout_below="@+id/editText"
      android:layout_alignLeft="@+id/editText"
      android:layout_alignStart="@+id/editText"
      android:hint="Points on Y-Axis"
      android:layout_alignRight="@+id/editText"
      android:layout_alignEnd="@+id/editText" />
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Touch to get co-ordinates"
      android:id="@+id/textview"
      android:focusable="true"
      android:clickable="true"
      android:textSize="20dp"
      android:layout_centerVertical="true"
      android:layout_centerHorizontal="true" />
</RelativeLayout>

Step 3 − Add the following code to src/MainActivity.java

package app.com.sample;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
   TextView T;
   EditText E1, E2;
   float x = 0f;
   float y = 0f;
   @Override
   protected void onCreate(Bundle savedInstanceState){
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      E1 = (EditText) findViewById(R.id.editText);
      E2 = (EditText) findViewById(R.id.editText2);
      T=(TextView)findViewById(R.id.textview);
      T.setOnTouchListener(new View.OnTouchListener(){
         @Override
         public boolean onTouch(View v, MotionEvent event) {
            final float x = event.getX();
            final float y = event.getY();
            float lastXAxis = x;
            float lastYAxis = y;
            E1.setText(Float.toString(lastXAxis));
            E2.setText(Float.toString(lastYAxis));
            return true;
         }
      });
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://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: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>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

Click here to download the project code.

raja
Published on 31-Jul-2019 06:45:16
Advertisements