Android QR code generation function

Call the System album scan to return a rusult, and then through the input text to achieve the function of the two-dimensional code generation.

First step Download a zxing third party package

Then initialize the control

Activity_main.xml

Layout file

<?xml version= "1.0" encoding= "Utf-8"?>
<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"
Android:layout_width= "Fill_parent"
android:layout_height= "Fill_parent"
Android:background= "@android: Color/white"
android:orientation= "Vertical" >


<button
Android:id= "@+id/btn_scan_barcode"
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
android:layout_margintop= "30DP"
android:text= "Open Camera"
android:onclick= "Scanner"/>

<linearlayout
android:orientation= "Horizontal"
android:layout_margintop= "10DP"
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content" >

<textview
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
Android:textcolor= "@android: Color/black"
Android:textsize= "18SP"
android:text= "Scan Result:"/>

<textview
Android:id= "@+id/tv_scan_result"
Android:layout_width= "Fill_parent"
Android:textsize= "18SP"
Android:textcolor= "@android: Color/black"
android:layout_height= "Wrap_content"/>
</LinearLayout>

<edittext
Android:id= "@+id/et_qr_string"
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
android:layout_margintop= "30DP"
Android:hint= "Input the text"/>

<button
Android:id= "@+id/btn_add_qrcode"
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
android:text= "Generate QRCode"
android:onclick= "Make"/>

<imageview
Android:id= "@+id/iv_qr_image"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
android:layout_margintop= "20DP"
android:layout_gravity= "Center"
android:background= "@drawable/weixin_logo"/>


</LinearLayout>

The second step calls the system camera implementation to scan the QR code and return reuslt

Camera.xml

<?xml version= "1.0" encoding= "Utf-8"?>
<framelayout xmlns:android= "Http://schemas.android.com/apk/res/android"
Android:layout_width= "Fill_parent"
android:layout_height= "Fill_parent" >


<surfaceview
Android:id= "@+id/preview_view"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"
android:layout_gravity= "Center"/>


<com.zxing.view.viewfinderview
Android:id= "@+id/viewfinder_view"
Android:layout_width= "Wrap_content"
android:layout_height= "Wrap_content"/>


<relativelayout
Android:layout_width= "Fill_parent"
android:layout_height= "Fill_parent"
android:layout_gravity= "Center"
android:orientation= "Vertical" >


<textview
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
Android:layout_alignparenttop= "true"
Android:layout_centerinparent= "true"
android:background= "@drawable/navbar"
android:gravity= "Center"
Android:paddingbottom= "10DP"
android:paddingtop= "10DP"
android:text= "Scan Barcode"
Android:textcolor= "@android: Color/white"
Android:textsize= "18SP"
android:textstyle= "Bold"/>


<button
Android:id= "@+id/btn_cancel_scan"
Android:layout_width= "230DP"
android:layout_height= "40DP"
Android:layout_alignparentbottom= "true"
Android:layout_centerinparent= "true"
Android:layout_marginbottom= "75DP"
android:text= "Cancel"
Android:textsize= "15SP"
android:textstyle= "Bold"/>


<!--<linearlayout
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
Android:layout_alignparentbottom= "true"
android:orientation= "Vertical" >


<textview
Android:layout_width= "Fill_parent"
android:layout_height= "Wrap_content"
Android:layout_margin= "2DP"
android:gravity= "Center"
android:text= "@string/scan_prompt_info"
Android:textcolor= "@android: Color/white"
Android:textsize= "15SP"
android:textstyle= "Bold"/>
</LinearLayout>

</RelativeLayout>


</FrameLayout>

The third step implements the input text click return a Bitmap object, then set the ImageView to bitmap inside, then the QR code is displayed. Of course you can also add background pictures, all in all, it is more convenient to achieve!

The final result is as follows

Android QR code generation function