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Write 1D and 2D Barcodes to an Image - Java Android

This tutorial shows how to write barcodes in a Java Android application using the LEADTOOLS SDK.

Overview
Summary	This tutorial covers how to write barcodes in an Java Android application.
Completion Time	30 minutes
Visual Studio Project	Download tutorial project (104 KB)
Platform	Java (Android)
IDE	Android Studio
Runtime License	Download LEADTOOLS
Try it in another language	C#: .NET 6+ (Console) C API: C DLL (Windows) Java: Java, Android Python: Python

Required Knowledge

Get familiar with the basic steps of creating a project by reviewing the Add References and Set a License and Display Images in an Image Viewer tutorials, before working on the Write 1D and 2D Barcodes to an Image - Java Android tutorial.

Create the Project and Add LEADTOOLS References

Start with a copy of the project created in the Add References and Set a License tutorial. If you do not have that project, follow the steps in that tutorial to create it.

The references needed depend upon the purpose of the project. This tutorial requires the following .JAR and .SO files:

The .JAR files can be found at: <INSTALL_DIR>\Bin\Java

leadtools.barcode.jar

The .SO files can be found at: <INSTALL_DIR>\Bin\Android

libleadtools.barcode.so
libleadtools.barcode.lead2dwrite.so
libleadtools.barcode.oned.so
libleadtools.barcode.pdfwrite.so
libleadtools.barcode.qrwrite.so
libleadtools.barcode.datamatrixwrite.so
libleadtools.imageprocessing.core.so
libleadtools.imageprocessing.utilities.so
libleadtools.drawing.so

For a complete list of which DLL files are required for your application, refer to Files to be Included With Your Application.

Set the License File

The License unlocks the features needed for the project. It must be set before any toolkit function is called. For details, including tutorials for different platforms, refer to Setting a Runtime License.

There are two types of runtime licenses:

Evaluation license, obtained at the time the evaluation toolkit is downloaded. It allows the toolkit to be evaluated.
Deployment license. If a Deployment license file and developer key are required, refer to Obtaining a License.

Note

Adding LEADTOOLS local references and setting a license are covered in more detail in the Add References and Set a License tutorial.

Set the Application Layout

In the Project Explorer window, open the activity_main.xml file found in the app/src/main/res/layout directory. Below the RasterImageViewer XML code add a new Write barcodes button.

Java

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" 
    android:weightSum="1.0" 
    android:background="@android:color/darker_gray"> 
 
    <Button 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:text="Select Image From Gallery" 
        android:onClick="onSelectImage"/> 
 
    <leadtools.controls.RasterImageViewer 
        android:id="@+id/rasterimageviewer" 
        android:layout_width="match_parent" 
        android:layout_height="0dp" 
        android:layout_weight=".96" 
        android:background="@android:color/white"/> 
 
    <Button 
        android:id="@+id/button" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:text="Write barcodes" 
        android:onClick="writeBarcodes"/> 
 
</LinearLayout>

Add the Write Barcode Information Code

In MainActivity.java, add the following import statements before the MainActivity class:

Java

import leadtools.barcode.BarcodeAlignment; 
import leadtools.barcode.BarcodeData; 
import leadtools.barcode.BarcodeEngine; 
import leadtools.barcode.BarcodeOutputTextPosition; 
import leadtools.barcode.BarcodeSymbology; 
import leadtools.barcode.OneDBarcodeWriteOptions; 
import leadtools.barcode.QRBarcodeData; 
import leadtools.barcode.QRBarcodeECCLevel; 
import leadtools.barcode.QRBarcodeSymbolModel; 
import leadtools.barcode.QRBarcodeWriteOptions;

Add the following member variables to the MainActivity class:

Java

private BarcodeEngine engine; 
private BarcodeData data; 
private QRBarcodeData qrData; 
private QRBarcodeWriteOptions qrOptions;

Update the onCreate() function as shown below:

Java

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
 
    // Load LEADTOOLS native libraries 
    try{ 
        Platform.setLibPath(sharedLibsPath); 
        Platform.loadLibrary(LTLibrary.LEADTOOLS); 
        Platform.loadLibrary(LTLibrary.CODECS); 
        Platform.loadLibrary(LTLibrary.BARCODE); 
    } 
    catch(Exception ex) { 
        Log.d(TAG,"Failed to load LEADTOOLS Native libraries" ); 
    } 
 
    engine = new BarcodeEngine(); 
    data = new BarcodeData(); 
    qrData = new QRBarcodeData(); 
    qrOptions = new QRBarcodeWriteOptions(); 
}

Create a writeBarcodes() function to write a UPCA barcode and QR barcode to the given image.

Java

public void writeBarcodes(View v ) 
{ 
    RasterImage image = mViewer.getImage(); 
    if(image != null) 
    { 
        if(count % 2 == 0) { 
            // Write 1D barcode 
            data.setSymbology(BarcodeSymbology.UPC_A); 
            data.setValue("01234567890"); 
            data.setBounds(new LeadRect(10, 10, 600, 200)); 
 
            OneDBarcodeWriteOptions options = new OneDBarcodeWriteOptions(); 
            options.setEnableErrorCheck(true); 
            options.setTextPosition(BarcodeOutputTextPosition.DEFAULT); 
 
            try 
            { 
                engine.getWriter().writeBarcode(image, data, options); 
            } 
            catch (Exception ex) { 
                Toast.makeText(this, ex.getMessage(), Toast.LENGTH_LONG).show(); 
            } 
        } 
        else 
        { 
            //Write 2D barcode 
            qrData.setSymbolModel(QRBarcodeSymbolModel.MODEL1_AUTOSIZE); 
            qrData.setSymbology(BarcodeSymbology.QR); 
            qrData.setValue("QR Data"); 
            qrData.setBounds(new LeadRect(10,300,600,200)); 
 
            qrOptions.setGroupNumber(0); 
            qrOptions.setGroupTotal(0); 
            qrOptions.setXModule(30); 
            qrOptions.setECCLevel(QRBarcodeECCLevel.LEVEL_L); 
            qrOptions.setHorizontalAlignment(BarcodeAlignment.NEAR); 
            qrOptions.setVerticalAlignment(BarcodeAlignment.NEAR); 
 
            try 
            { 
                engine.getWriter().writeBarcode(image, qrData, qrOptions); 
                File file = new File(this.getFilesDir(), "output.png"); 
                String path = file.getAbsolutePath(); 
                codecs.save(image, LeadStreamFactory.create(path), RasterImageFormat.PNG, 0); 
                Toast.makeText(this, path, Toast.LENGTH_LONG).show(); 
            } 
            catch(Exception ex) 
            { 
                Toast.makeText(this, ex.getMessage(), Toast.LENGTH_LONG).show(); 
            } 
        } 
        count++; 
    } 
}

Run the Project

Press Shift + F10 to run the application. Follow the steps below to test the application.

On your Android device, select the SELECT IMAGE FROM GALLERY to load in the image to write the barcode to.
Select the WRITE BARCODES button to write the two barcodes to the image and save it.

Wrap-up

This tutorial shows how to write 1D and 2D barcodes to an image.

Write 1D and 2D Barcodes to an Image - Java Android

Required Knowledge

Create the Project and Add LEADTOOLS References

Set the License File

Set the Application Layout

Add the Write Barcode Information Code

Run the Project

Wrap-up

See Also