Generate QR Code using Google Chart Tools APIs

Google Chart Tools provide a perfect way to visualize data on your website. From simple line charts to complex hierarchical tree maps, the chart galley provides a large number of well-designed chart types. Populating your data is easy using the provided client- and server-side tools.

It's a example of Android app to generate QR Code using Google Chart Tools APIs.

Generate QR Code using Google Chart Tools APIs

package com.AndroidQRCode;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidQRCodeActivity extends Activity {

final static String urlGoogleChart = "http://chart.apis.google.com/chart";
final static String urlQRApi = "?chs=400x400&cht=qr&chl=";
final static String urlMySite = "http://lesapplication.blogspot.com/";

ImageView QRCode;
TextView MySite;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
QRCode = (ImageView)findViewById(R.id.qrimage);
MySite = (TextView)findViewById(R.id.mysite);
MySite.setText(urlMySite);

Bitmap bm = loadQRCode();
if(bm == null){
Toast.makeText(AndroidQRCodeActivity.this,
"Problem in loading QR Code1",
Toast.LENGTH_LONG).show();
}else{
QRCode.setImageBitmap(bm);
}

}

private Bitmap loadQRCode(){
Bitmap bmQR = null;
InputStream inputStream = null;

try {
inputStream = OpenHttpConnection(urlGoogleChart + urlQRApi + urlMySite);
bmQR = BitmapFactory.decodeStream(inputStream);
inputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return bmQR;
}

private InputStream OpenHttpConnection(String strURL) throws IOException{
InputStream is = null;
URL url = new URL(strURL);
URLConnection urlConnection = url.openConnection();

try{
HttpURLConnection httpConn = (HttpURLConnection)urlConnection;
httpConn.setRequestMethod("GET");
httpConn.connect();

if (httpConn.getResponseCode() == HttpURLConnection.HTTP_OK) {
is = httpConn.getInputStream();
}
}catch (Exception ex){
}

return is;
}

}


<?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"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<ImageView
android:id="@+id/qrimage"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<TextView
android:id="@+id/mysite"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>


Permission: "android.permission.INTERNET" is needed.

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