Zbar integration in Android application

Question

I am using Android ADT Bundle to work with dev. After reading several guides on the Internet, I added the com.dm.zbar.android.scanner package to my project. I included CameraPreview.java, ZBarConstants.java and ZBarScannerActivity.java in the package. Despite this, the variable ZBAR_SCANNER_REQUEST var in the ScanActivity.java class (created by me, but using the zbar methods) cannot be resolved by the variable. Everything except this variable is accepted. Any idea why this is happening? Note. My libs folder has it all:

https://github.com/DushyanthMaguluru/ZBarScanner/tree/master/ZBarScannerLibrary/libs

and zbar.jar are included in the build path.

ScanActivity:

package com.xx.xxx; import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.content.pm.PackageManager; import android.view.Menu; import android.view.View; import android.widget.Toast; import com.dm.zbar.android.scanner.ZBarConstants; import com.dm.zbar.android.scanner.ZBarScannerActivity; import net.sourceforge.zbar.Symbol; public class ScanActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_scan); } public void launchScanner(View v) { if (isCameraAvailable()) { Intent intent = new Intent(this, ZBarScannerActivity.class); startActivityForResult(intent, ZBAR_SCANNER_REQUEST); } else { Toast.makeText(this, "Rear Facing Camera Unavailable", Toast.LENGTH_SHORT).show(); } } public void launchQRScanner(View v) { if (isCameraAvailable()) { Intent intent = new Intent(this, ZBarScannerActivity.class); intent.putExtra(ZBarConstants.SCAN_MODES, new int[]{Symbol.QRCODE}); startActivityForResult(intent, ZBAR_SCANNER_REQUEST); } else { Toast.makeText(this, "Rear Facing Camera Unavailable", Toast.LENGTH_SHORT).show(); } } public boolean isCameraAvailable() { PackageManager pm = getPackageManager(); return pm.hasSystemFeature(PackageManager.FEATURE_CAMERA); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case ZBAR_SCANNER_REQUEST: case ZBAR_QR_SCANNER_REQUEST: if (resultCode == RESULT_OK) { Toast.makeText(this, "Scan Result = " + data.getStringExtra(ZBarConstants.SCAN_RESULT), Toast.LENGTH_SHORT).show(); } break; } } } 

Just in case, this is true: AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.xx.xxx" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.CAMERA" /> <uses-feature android:name="android.hardware.camera" android:required="false" /> <application android:icon="@drawable/ic_launcher" android:label="xx" android:theme="@style/AppTheme" > <activity android:name="com.xx.xxx.MainActivity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="com.xx.xxx.WvActivity" /> <activity android:name="com.xx.xxx.ScanActivity" /> <activity android:name="com.dm.zbar.android.scanner.ZBarScannerActivity" android:screenOrientation="landscape" /> </application> 

Answer 1

I checked the example of the ZBar library. You made a mistake.

This error occurred because you did not declare these two variables in your activity.

 private static final int ZBAR_SCANNER_REQUEST = 0; private static final int ZBAR_QR_SCANNER_REQUEST = 1; 

you need to declare these variables above your onCreate (..) method.

See ZBar Example .