Android Studio QR code sweep using streamlined zxing

Today to learn to do a sweep and then on Baidu to find the works of predecessors, and finally found, so began to engage in

I'm using the latest Android Studio

Android Studio 3.1.2
Build #AI -173.4720617, built on April 14, 2018
JRE:1.8.0_152-RELEASE-1024-B02 AMD64
JVM:OPENJDK 64-bit Server VM by JetBrains S.R.O
Windows 10 10.0

Want to do the app looks like: A interface has a button. Click to skip to Sweep B interface, after sweep, callback to a interface, a toast in the A interface

First quote:

Dependencies in Build.gradle add a sentence implementation ' cn.yipianfengye.android:zxing-library:2.2 '

If other versions of Android Studio introduce an error, use the compile reference.

dependencies {    Implementation filetree (dir: ' Libs ', include: [' *.jar '])    implementation ' Com.android.support: appcompat-v7:27.1.1 '    implementation ' com.android.support.constraint:constraint-layout:1.1.0 '    Testimplementation ' junit:junit:4.12 '    androidtestimplementation ' com.android.support.test:runner:1.0.2 '    Androidtestimplementation ' com.android.support.test.espresso:espresso-core:3.0.2 '    implementation ' cn.yipianfengye.android:zxing-library:2.2 '}

Demo in a total of three layout two Class A picture I named scan defines a color resource

1. Open Colors.xml Add resources

<item name= "Scan_color" > #ffffff </item>

2, copy pictures scan.png to drawable

3, hands-on a interface

The name Activity_camera.xml layout is:

<?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 "    tools:context=". QR ">    <button        android:id=" @+id/bt_qr "        android:layout_width=" wrap_content "        android:layout_ height= "Wrap_content"        android:layout_weight= "1"        android:text= "scan qr Code"/></linearlayout>

　

QR Class Code:

Package Com.example.administrator.qr;import Android.content.intent;import Android.support.v7.app.appcompatactivity;import Android.os.bundle;import Android.view.view;import Android.widget.button;import Android.widget.toast;import Com.uuzuche.lib_zxing.activity.codeutils;import Java.nio.charset.coderresult;public class QR extends Appcompatactivity {@Override protected void Onactivityresult (i NT Requestcode, int resultcode, Intent data) {if (Requestcode ==1) {if (data!=null) {Bundl                E bundle = Data.getextras ();                                    if (bundle==null) {return; } if (Bundle.getint (codeutils.result_type) ==codeutils.result_success) {String ret = Bundl                    E.getstring (codeutils.result_string);                Toast.maketext (This, "Sweep code successful, result:" +ret, Toast.length_short). Show ();    }}} super.onactivityresult (Requestcode, ResultCode, data); }    @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.LAYOUT.ACTIVITY_QR);        Button button = Findviewbyid (R.ID.BT_QR);                Button.setonclicklistener (New View.onclicklistener () {@Override public void OnClick (View v) {                Intent Intent = new Intent (qr.this,camera.class);            Startactivityforresult (intent,1);    }        }); }    }

4. Start to engage B interface

Name Activity_camera.xml Layout code:

<?xml version= "1.0" encoding= "Utf-8"? ><relativelayout 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 "Andro Id:layout_width= "Match_parent" android:layout_height= "Match_parent" tools:context= ". Camera "> <framelayout android:id=" @+id/mycamera "android:layout_width=" Match_parent "Android : layout_height= "Match_parent" > </FrameLayout> <button android:id= "@+id/bt_back" Android:la        Yout_width= "Wrap_content" android:layout_height= "wrap_content" android:text= "Back"/> <Button        Android:id= "@+id/bt_kaideng" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" Android:layout_alignparentleft= "false" android:layout_alignparentright= "true" android:layout_alignparenttop        = "true" android:text= "Open flash"/> <textviewAndroid:id= "@+id/textview" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" a Ndroid:layout_alignbottom= "@+id/bt_back" android:layout_alignparenttop= "true" android:layout_aligntop= "@+id/        Bt_back "android:layout_centerhorizontal=" true "android:gravity=" fill_vertical "android:text=" Sweep " Android:textcolor= "@color/encode_view" android:textsize= "24SP"/></relativelayout>

And then get a layout to replace that square window with the original sweep,:

The name Camera.xml layout is:

<framelayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:app= "http://schemas.android.com        /apk/res-auto "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"/&gt    ; <com.uuzuche.lib_zxing.view.viewfinderview android:id= "@+id/viewfinder_view" android:layout_width= "Wrap_c Ontent "android:layout_height=" wrap_content "app:inner_corner_color=" @color/scan_corner_color "//This is a sweep sweep four corners of Color app:inner_corner_length= "30DP" app:inner_corner_width= "2DP"//This is a sweep sweep four corners of the thickness app:inner_height= "200 DP "app:inner_margintop=" 150DP "app:inner_scan_bitmap=" @drawable/scan "//This is the sweep of the line app:inner_scan_is  Circle= "false" app:inner_scan_speed= "50"//This is the line from the top down to the speed app:inner_width= "200DP"/></framelayout>

The ID in this layout cannot be changed or the null pointer is reported

Com.uuzuche.lib_zxing.view.ViewfinderView tags can be modified as needed

The Camera Class code is:

Package Com.example.administrator.qr;import Android.content.intent;import Android.graphics.bitmap;import Android.support.v7.app.appcompatactivity;import Android.os.bundle;import Android.util.log;import Android.view.windowmanager;import Com.uuzuche.lib_zxing.activity.capturefragment;import Com.uuzuche.lib_ Zxing.activity.codeutils;public class Camera extends Appcompatactivity {@Override protected void onCreate (Bundle sa        Vedinstancestate) {super.oncreate (savedinstancestate);        Getsupportactionbar (). Hide ();        GetWindow (). SetFlags (WindowManager.LayoutParams.ALPHA_CHANGED, WindowManager.LayoutParams.ALPHA_CHANGED);        Setcontentview (R.layout.activity_camera);//LOG.D ("Bug", "onCreate:" + 1);        Capturefragment capturefragment = new Capturefragment ();        LOG.D ("Bug", "OnCreate:" +2);  Codeutils.setfragmentargs (Capturefragment,r.layout.camera);        Set Custom Scan interface Capturefragment.setanalyzecallback (analyzecallback); LOG.D ("Bug", "OnCreate: "+3); The r.id.fl_zxing_container corresponds to the Fragment Getsupportfragmentmanager () in the Setcontentview layout. BeginTransaction (). Replac  E (R.id.mycamera, capturefragment). commit ();  Replace Setcontenview settings in the layout with ID Mycamera} codeutils.analyzecallback analyzecallback = new Codeutils.analyzecallback () {@Override public void onanalyzesuccess (Bitmap mbitmap, String result) {Intent resultintent =            New Intent ();            Bundle bundle = new bundle ();            Bundle.putint (Codeutils.result_type, codeutils.result_success);            Bundle.putstring (codeutils.result_string, RESULT);            Resultintent.putextras (bundle);            Camera.this.setResult (RESULT_OK, resultintent);        Camera.this.finish ();            } @Override public void onanalyzefailed () {Intent resultintent = new Intent ();            Bundle bundle = new bundle ();            Bundle.putint (Codeutils.result_type, codeutils.result_failed); Bundle.putString (Codeutils.result_string, "");            Resultintent.putextras (bundle);            Camera.this.setResult (RESULT_OK, resultintent);        Camera.this.finish (); }    };}

Last Add permission

   <uses-permission android:name= "Android.permission.CAMERA"/>    <uses-permission android:name= " Android.permission.FLASHLIGHT "/>    <uses-feature android:name=" Android.hardware.camera "/>    < Uses-feature android:name= "Android.hardware.camera.autofocus"/>    <uses-permission android:name= " Android.permission.VIBRATE "/>    <uses-permission android:name=" Android.permission.WAKE_LOCK "/>    <uses-permission android:name= "Android.permission.READ_EXTERNAL_STORAGE"/>    <uses-permission Android : Name= "Android.permission.INTERNET"/>

Declaration interface

<activity android:name= "Com.example.administrator.qr.Camera" >

　　

Android Studio QR code sweep using streamlined zxing