I develope ZXing barcode continuous scanner following this page on Android Studio.

My App build.gradle had include:

repositories { mavenCentral() maven { url "" } } dependencies { compile fileTree(include: ['*.jar'], dir: 'libs') compile 'com.android.support:appcompat-v7:23.0.1' compile files('src/main/jniLibs/scanditsdk-android-4.7.5.jar') compile files('src/main/jniLibs/httpclient-4.0.jar') compile 'com.journeyapps:zxing-android-embedded:3.0.3@aar' compile 'com.google.zxing:core:3.2.0' }

And my Fragment.xml's layout:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#00CC00" android:orientation="vertical" android:weightSum="100"> <com.journeyapps.barcodescanner.CompoundBarcodeView android:id="@+id/barcode_scanner" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="40" > </com.journeyapps.barcodescanner.CompoundBarcodeView> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="5dp" android:gravity="center" android:orientation="horizontal" android:weightSum="100" > <Button android:id="@+id/btnStartScan" android:layout_width="0dp" android:layout_height="50dp" android:layout_weight="25" android:text="Start" android:background="@drawable/buttonstyle"/> <Button android:id="@+id/btnStopScan" android:layout_width="0dp" android:layout_height="50dp" android:layout_weight="25" android:text="Stop" android:background="@drawable/buttonstyle"/> <Button android:id="@+id/btnPauseScan" android:layout_width="0dp" android:layout_height="50dp" android:layout_weight="25" android:text="Pause" android:background="@drawable/buttonstyle"/> <Button android:id="@+id/btnResumeScan" android:layout_width="0dp" android:layout_height="50dp" android:layout_weight="25" android:text="Resume" android:background="@drawable/buttonstyle"/> </LinearLayout> </LinearLayout>

Then, my Fragment code look like following:

public class CMCSMOFragment extends Fragment implements View.OnClickListener { private CompoundBarcodeView barcodeView; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (container == null) { return null; } View v; v = inflater.inflate(R.layout.cmcsmo_layout, container, false); barcodeView = (CompoundBarcodeView) v.findViewById(R.id.barcode_scanner); barcodeView.decodeContinuous(callback); return v; } private BarcodeCallback callback = new BarcodeCallback() { @Override public void barcodeResult(BarcodeResult result) { if (result.getText() != null) { barcodeView.setStatusText(result.getText()); } //Do something with code result } @Override public void possibleResultPoints(List<ResultPoint> resultPoints) { } }; }

And when I build my app, the CompoundBarcodeView only show a black view with ZXing text:

Place a barcode inside the viewfinder rectangle to scan it.

Edit:

Follow Lennon suggestion, I had used zxing-minimum but it doesn't allow to work on Portrait mode :(.

How should I do to solve this problem? Thanks for all help!

2

5 Answers

It's so easy, owner of ZXing said that only add following code into onResume and onPause overrided method:

@Override public void onResume() { barcodeView.resume(); super.onResume(); } @Override public void onPause() { barcodeView.pause(); super.onPause(); }
2

You must initialize the barcodeView.

Try this code:

IntentIntegrator integrator = IntentIntegrator.forSupportFragment(this); barcodeView.initializeFromIntent(integrator.createScanIntent());

Try to use the minimal library of zxing like following link:

It's easy. You just have to add these lines into your gradle

repositories { mavenCentral() maven { url "" } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.android.support:support-v13:22.2.0' // Zxing minimal libraries compile 'com.embarkmobile:zxing-android-minimal:2.0.0@aar' compile 'com.embarkmobile:zxing-android-integration:2.0.0@aar' compile 'com.google.zxing:core:3.0.1' }

And then just call the barcode using this

new IntentIntegrator(this).initiateScan(); // `this` is the current Activity

In you case, you wanna use a custom layout, so you must create your custom layout following some parameters, such as the layout below:

<?xml version="1.0" encoding="utf-8"?> <merge xmlns:android="" xmlns:tools=""> <SurfaceView android:id="@+id/zxing_preview_view" android:layout_width="fill_parent" android:layout_height="fill_parent"/> <com.google.zxing.client.android.ViewfinderView android:id="@+id/zxing_viewfinder_view" android:layout_width="fill_parent" android:layout_height="fill_parent"/> <LinearLayout android:id="@+id/zxing_result_view" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@color/zxing_result_view" android:visibility="gone" android:baselineAligned="false"> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" android:padding="@dimen/zxing_standard_padding"> <LinearLayout android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="fill_parent" android:gravity="right|center_vertical"> <ImageView android:id="@+id/zxing_barcode_image_view" android:layout_width="160dip" android:layout_height="wrap_content" android:maxWidth="160dip" android:maxHeight="160dip" android:layout_marginBottom="@dimen/zxing_half_padding" android:adjustViewBounds="true" android:scaleType="centerInside" tools:ignore="ContentDescription"/> <LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/zxing_msg_default_format" android:textColor="@color/zxing_result_minor_text" android:textStyle="bold" android:paddingRight="@dimen/zxing_half_padding"/> <TextView android:id="@+id/zxing_format_text_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@color/zxing_result_minor_text"/> </LinearLayout> <LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/zxing_msg_default_type" android:textColor="@color/zxing_result_minor_text" android:textStyle="bold" android:paddingRight="@dimen/zxing_half_padding"/> <TextView android:id="@+id/zxing_type_text_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@color/zxing_result_minor_text"/> </LinearLayout> <LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/zxing_msg_default_time" android:textColor="@color/zxing_result_minor_text" android:textStyle="bold" android:paddingRight="@dimen/zxing_half_padding"/> <TextView android:id="@+id/zxing_time_text_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@color/zxing_result_minor_text"/> </LinearLayout> <LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content"> <TextView android:id="@+id/zxing_meta_text_view_label" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/zxing_msg_default_meta" android:textColor="@color/zxing_result_minor_text" android:textStyle="bold" android:paddingRight="@dimen/zxing_half_padding"/> <TextView android:id="@+id/zxing_meta_text_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@color/zxing_result_minor_text"/> </LinearLayout> </LinearLayout> <ScrollView android:layout_width="wrap_content" android:layout_height="wrap_content"> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:id="@+id/zxing_contents_text_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@color/zxing_result_text" android:textColorLink="@color/zxing_result_text" android:textSize="22sp" android:paddingLeft="12dip" android:autoLink="web" android:textIsSelectable="true"/> <TextView android:id="@+id/zxing_contents_supplement_text_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="@color/zxing_result_text" android:textColorLink="@color/zxing_result_text" android:paddingLeft="12dip" android:autoLink="web" android:textIsSelectable="true"/> </LinearLayout> </ScrollView> </LinearLayout> <LinearLayout android:id="@+id/zxing_result_button_view" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:gravity="center"> <Button android:visibility="gone"/> <Button android:visibility="gone"/> <Button android:visibility="gone"/> <Button android:visibility="gone"/> </LinearLayout> </LinearLayout> <LinearLayout android:layout_gravity="bottom|center_horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical"> <TextView android:id="@+id/zxing_status_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom|center_horizontal" android:background="@color/zxing_transparent" android:text="@string/zxing_msg_default_status" android:textColor="@color/zxing_status_text"/> <Button android:id="@id/zxing_back_button" android:layout_marginTop="10dp" android:layout_width="fill_parent" android:layout_height="wrap_content" android:height="60dp" android:textAlignment="center" android:layout_gravity="bottom|center_horizontal" android:text="@string/zxing_button_cancel"/> </LinearLayout> </merge>

After that, you can set the above layout into integrator like

IntentIntegrator integrator = new IntentIntegrator(this); integrator.setCaptureLayout(R.layout.custom_layout); integrator.initiateScan();

But remember, you have to follow those parameters. It means that you have to use the same name for all the views.

2

Does your app have permission to use the device camera? Add that permission in your manifest, and then after installing the app, go to your phone settings > apps > your app > permissions. And then grant the camera permission

I had the same issue I just removed 

 android:hardwareAccelerated="false" android:largeHeap="true"

from the manifest and it worked!

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