How to create different graphs in Android App?

AndroidApps/ApplicationsMobile Development

This example demonstrates how to do I in android.

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 dependency in the build.gradle (Module: app)

implementation 'com.jjoe64:graphview:4.2.1'

Step 3 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
   android:orientation="vertical"
   android:padding="16sp"
   tools:context=".MainActivity">
   <com.jjoe64.graphview.GraphView
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:id="@+id/graph" />
</LinearLayout>

Step 4 − Add the following code to src/MainActivity.java

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import com.jjoe64.graphview.GraphView;
import com.jjoe64.graphview.series.DataPoint;
import com.jjoe64.graphview.series.LineGraphSeries;
public class MainActivity extends AppCompatActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      GraphView graph = findViewById(R.id.graph);
      LineGraphSeries<DataPoint> series = new LineGraphSeries<>(new DataPoint[] {
         new DataPoint(0, 1),
         new DataPoint(1, 5),
         new DataPoint(2, 3),
         new DataPoint(3, 2),
         new DataPoint(4, 6)
      });
      graph.addSeries(series);
   }
}

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: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>

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 the android studio, open one of your project's activity files and click the Run Play Iconicon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

raja
Published on 30-Oct-2019 09:57:37
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