How to implement scanning of barcode from gallery in android

Question

Here is what i have tried.

I have implemented Zbar Scanner in android application in which I can scan barocde and get result.

I have implemented this in my android project. now I want to implement scanner which scans images(of course Bar code images) from gallery. I know this can be possible anyhow. check this link. It has barcode image scanning.

I have tried to search it out but failed. Please Help me out.

Answer 1

This is possible now with the new Barcode Scanning Apis available from Google Play Services 7.8 version. It has method to detect barcode passed as a bitmap. Get path of image from gallery and convert it to bitmap and pass it like below:

     Frame frame = new Frame.Builder().setBitmap(bitmap).build();
     BarcodeDetector barcodeDetector = new BarcodeDetector.Builder(context)
                    .build();
if(barcode.isOperational()){
    SparseArray<Barcode> sparseArray = barcodeDetector.detect(frame);
                if(sparseArray != null && sparseArray.size() > 0){
                    for (int i = 0; i < sparseArray.size(); i++){
                                        Log.d(LOG_TAG, "Value: " + sparseArray.valueAt(i).rawValue + "----" + sparseArray.valueAt(i).displayValue);
                                        Toast.makeText(LOG_TAG, sparseArray.valueAt(i).rawValue, Toast.LENGTH_SHORT).show();

                                    }
                }else {
                    Log.e(LOG_TAG,"SparseArray null or empty");
                }

}else{
    Log.e(LOG_TAG, "Detector dependencies are not yet downloaded");
}

In your build.gradle file, include the following under dependencies section: compile 'com.google.android.gms:play-services:7.8.+'

Following Manifest permissions are must:

<uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

Meta data for google play services:

<meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />

Meta data for first time install/run time dependencies to be downloaded for getting barcode detector operational.

<meta-data
            android:name="com.google.android.gms.vision.DEPENDENCIES"
            android:value="barcode" />

For detailed usage of this api, Refer Github Sample, follow Code Lab, Documentation.