Android实现扫描二维码功能

2023-08-02 10:48:04 70

本文实例为大家分享了Android实现扫描二维码的具体代码，供大家参考，具体内容如下

1.效果图：

2.引用公共库:builder.radle，在app目录下

implementation'com.google.android.gms:play-services-maps:17.0.0'
implementation'com.google.android.gms:play-services-vision:19.0.0'
implementation'com.google.android.gms:auth-api-impl:11.6.0'

3.清单文件，拍照权限申请

4.主界面：

packagecom.example.administrator.testz;


importandroid.Manifest;
importandroid.app.Activity;
importandroid.content.ActivityNotFoundException;
importandroid.content.BroadcastReceiver;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.IntentFilter;
importandroid.content.pm.PackageManager;
importandroid.content.res.Resources;
importandroid.net.Uri;
importandroid.os.Bundle;
importandroid.os.PersistableBundle;
importandroid.os.Vibrator;
importandroid.util.Log;
importandroid.util.SparseArray;
importandroid.view.SurfaceHolder;
importandroid.view.SurfaceView;
importandroid.widget.TextView;

importcom.google.android.gms.vision.CameraSource;
importcom.google.android.gms.vision.Detector;
importcom.google.android.gms.vision.barcode.Barcode;
importcom.google.android.gms.vision.barcode.BarcodeDetector;

importjava.io.IOException;
importjava.util.ArrayList;

importandroidx.annotation.Nullable;
importandroidx.appcompat.app.AppCompatActivity;
importandroidx.core.app.ActivityCompat;


publicclassMainActivityextendsAppCompatActivity{

SurfaceViewsurfaceView;
CameraSourcecameraSource;
TextViewqrCodeText;
BarcodeDetectorbarcodeDetector;
publicstaticArrayListscannList;

@Override
protectedvoidonCreate(@NullableBundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView=(SurfaceView)findViewById(R.id.qrView);
qrCodeText=(TextView)findViewById(R.id.tv);
scannList=newArrayList<>();
barcodeDetector=newBarcodeDetector.Builder(this)
.setBarcodeFormats(Barcode.QR_CODE)
.build();
cameraSource=newCameraSource.Builder(this,barcodeDetector)
.setRequestedPreviewSize(640,480)
.setAutoFocusEnabled(true)
.build();
surfaceView.getHolder().addCallback(newSurfaceHolder.Callback(){
@Override
publicvoidsurfaceCreated(SurfaceHolderholder){
if(ActivityCompat.checkSelfPermission(getApplicationContext(),Manifest.permission.CAMERA)!=PackageManager.PERMISSION_GRANTED){
return;
}
try{
cameraSource.start(holder);
}catch(IOExceptione){
e.printStackTrace();
}
}

@Override
publicvoidsurfaceChanged(SurfaceHolderholder,intformat,intwidth,intheight){

}

@Override
publicvoidsurfaceDestroyed(SurfaceHolderholder){
cameraSource.stop();
}
});


barcodeDetector.setProcessor(newDetector.Processor(){
@Override
publicvoidrelease(){
}

@Override
publicvoidreceiveDetections(Detector.Detectionsdetections){
finalSparseArrayqrCode=detections.getDetectedItems();

if(qrCode.size()!=0){
qrCodeText.post(newRunnable(){
@Override
publicvoidrun(){
qrCodeText.setText(qrCode.valueAt(0).displayValue);
addInList(qrCode.valueAt(0).displayValue);
}
});
}
}
});

}

privatevoidaddInList(StringscannResult){
if(scannList.isEmpty()){
scannList.add(scannResult);
}else{
Stringa=scannList.get(scannList.size()-1);
if(!a.equals(scannResult)){
scannList.add(scannResult);
}
}
for(Strings:scannList){
Log.e("s","onCreate:"+s);
}
Log.e("size","addInList:"+scannList.size());

}

@Override
protectedvoidonDestroy(){
super.onDestroy();

}
}

5.布局页面：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

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Android实现扫描二维码功能

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