At Below we provide how to integrate barcode functionality in android project .
- Scanning the QR code can be done programmatically by using many ways:
- Using a web-based API solution, where the QR code or barcode is uploaded to the server, and the server returns the results.
- Using a web-based application that accesses your camera and scans the QR code or barcode and returns the results.
- By Integrating the Mobile Vision API of Google Play Service.
Following are the major formats that the Vision API supports.
> 1 Dimension barcodes: EAN-13, EAN-8, UPC-A, UPC-E, Code-39, Code-93, Code-128, ITF, Codabar.
>> 2 Dimension barcodes: QR Code, Data Matrix, PDF-417, AZTEC.
Android QR Code Scanner Example :-
In this example, we will scan the QR code of a web URL and Email address, and act on it. Here we will use Google Play Mobile Vision API to scan the QR code.
Create an activity_main.xml and add the following code.
activity_main.xml:-
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:gravity="center"
android:layout_height="match_parent">
<Button
android:id="@+id/btnScanBarcode"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="44dp"
android:text="Scan Barcode The Code Hub Demo"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.676"
app:layout_constraintStart_toStartOf="parent" />
</LinearLayout>
Create an activity_barcode__scane_.xml layout and add the following code. The SurfaceView widget is used for camera source.
<?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" android:padding="10dp"> <SurfaceView android:id="@+id/surfaceView" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_above="@+id/btnAction" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_centerVertical="true" /> <TextView android:gravity="center" android:id="@+id/txtBarcodeValue" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:text="No Barcode Detected" android:textColor="@android:color/white" android:textSize="20sp" /> <Button android:id="@+id/btnAction" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:text="ADD CONTENT IN THE MAIL" /> </RelativeLayout>
Create an activity_email_.xml layout to perform email action.
activity_email_.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout 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" android:gravity="center" android:orientation="vertical"> <TextView android:id="@+id/txtEmailAddress" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:text="Email Address: " android:textSize="16dp" android:textStyle="bold" /> <EditText android:id="@+id/inSubject" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@+id/txtEmailAddress" android:layout_centerHorizontal="true" android:ems="10" android:hint="Subject" /> <EditText android:id="@+id/inBody" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@+id/inSubject" android:layout_centerHorizontal="true" android:ems="10" android:hint="Body" /> <Button android:id="@+id/btnSendEmail" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_below="@+id/inBody" android:layout_centerHorizontal="true" android:layout_marginStart="8dp" android:layout_marginEnd="8dp" android:layout_marginBottom="64dp" android:gravity="center" android:text="Send Email" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" /> </LinearLayout>
build.gradle To Add This dependency implementation ‘com.google.android.gms:play-services-vision:20.1.3’
MainActivity.java
package com.thecodehub.myapplication; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; public class MainActivity extends AppCompatActivity { Button btnScanBarcode; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnScanBarcode=findViewById(R.id.btnScanBarcode); btnScanBarcode.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent =new Intent(getApplicationContext(),Barcode_Scane_Activity.class); startActivity(intent); } }); } }Barcode_Scane_Activity.Java
package com.thecodehub.myapplication; import androidx.appcompat.app.AppCompatActivity; import androidx.core.app.ActivityCompat; import android.Manifest; import android.content.Intent; import android.content.pm.PackageManager; import android.net.Uri; import android.os.Bundle; import android.util.SparseArray; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import com.google.android.gms.vision.CameraSource; import com.google.android.gms.vision.Detector; import com.google.android.gms.vision.barcode.Barcode; import com.google.android.gms.vision.barcode.BarcodeDetector; import java.io.IOException; public class Barcode_Scane_Activity extends AppCompatActivity { SurfaceView surfaceView; TextView txtBarcodeValue; private BarcodeDetector barcodeDetector; private CameraSource cameraSource; private static final int REQUEST_CAMERA_PERMISSION = 201; Button btnAction; String intentData = ""; boolean isEmail = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_barcode__scane_); initViews(); } private void initViews() { txtBarcodeValue = findViewById(R.id.txtBarcodeValue); surfaceView = findViewById(R.id.surfaceView); btnAction = findViewById(R.id.btnAction); btnAction.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (intentData.length() > 0) { if (isEmail) startActivity(new Intent(getApplicationContext(), Email_Activity.class).putExtra("email_address", intentData)); else { startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(intentData))); } } } }); } private void initialiseDetectorsAndSources() { Toast.makeText(getApplicationContext(), "Barcode scanner started", Toast.LENGTH_SHORT).show(); barcodeDetector = new BarcodeDetector.Builder(this) .setBarcodeFormats(Barcode.ALL_FORMATS) .build(); cameraSource = new CameraSource.Builder(this, barcodeDetector) .setRequestedPreviewSize(1920, 1080) .setAutoFocusEnabled(true) //you should add this feature .build(); surfaceView.getHolder().addCallback(new SurfaceHolder.Callback() { @Override public void surfaceCreated(SurfaceHolder holder) { if (ActivityCompat.checkSelfPermission(Barcode_Scane_Activity.this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) { try { cameraSource.start(surfaceView.getHolder()); } catch (IOException e) { e.printStackTrace(); } } else { ActivityCompat.requestPermissions(Barcode_Scane_Activity.this, new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { cameraSource.stop(); } }); barcodeDetector.setProcessor(new Detector.Processor<Barcode>() { @Override public void release() { Toast.makeText(getApplicationContext(), "To prevent memory leaks barcode scanner has been stopped", Toast.LENGTH_SHORT).show(); } @Override public void receiveDetections(Detector.Detections<Barcode> detections) { final SparseArray<Barcode> barcodes = detections.getDetectedItems(); if (barcodes.size() != 0) { txtBarcodeValue.post(new Runnable() { @Override public void run() { if (barcodes.valueAt(0).email != null) { txtBarcodeValue.removeCallbacks(null); intentData = barcodes.valueAt(0).email.address; txtBarcodeValue.setText(intentData); isEmail = true; btnAction.setText("ADD CONTENT TO THE MAIL"); } else { isEmail = false; btnAction.setText("LAUNCH URL"); intentData = barcodes.valueAt(0).displayValue; txtBarcodeValue.setText(intentData); } } }); } } }); } @Override protected void onPause() { super.onPause(); cameraSource.release(); } @Override protected void onResume() { super.onResume(); initialiseDetectorsAndSources(); } }This class performs the email sending task to the address mention in the QR code.
EmailActivity.java
package com.thecodehub.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Email_Activity extends AppCompatActivity implements View.OnClickListener{
EditText inSubject, inBody;
TextView txtEmailAddress;
Button btnSendEmail;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_email_);
initViews();
}
private void initViews() {
inSubject = findViewById(R.id.inSubject);
inBody = findViewById(R.id.inBody);
txtEmailAddress = findViewById(R.id.txtEmailAddress);
btnSendEmail = findViewById(R.id.btnSendEmail);
if (getIntent().getStringExtra("email_address") != null) {
txtEmailAddress.setText("Recipient : " + getIntent().getStringExtra("email_address"));
}
btnSendEmail.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_EMAIL, new String[]{txtEmailAddress.getText().toString()});
intent.putExtra(Intent.EXTRA_SUBJECT, inSubject.getText().toString().trim());
intent.putExtra(Intent.EXTRA_TEXT, inBody.getText().toString().trim());
startActivity(Intent.createChooser(intent, "Send Email"));
}
});
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnScanBarcode:
startActivity(new Intent(Email_Activity.this, Barcode_Scane_Activity.class));
break;
}
}
}
AndroidMenifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.thecodehub.myapplication"> <uses-feature android:name="android.hardware.camera" android:required="true" /> <uses-permission android:name="android.permission.CAMERA" /> <uses-feature android:name="android.hardware.camera.autofocus" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.CAMERA" /> <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/Theme.MyApplication"> <activity android:name=".Email_Activity"></activity> <activity android:name=".Barcode_Scane_Activity" /> <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>
Code Resource:-
Now you can run your project.
Output:-
Congratulations!!! you have developed your Bar Code Scanner In Android Example Integration. in Android Studio and now just keep following the rest of the tutorial step by step to become a great Android Developer. All the very best.
