小編給大家分享一下Android怎么實(shí)現(xiàn)掃描二維碼功能,相信大部分人都還不怎么了解,因此分享這篇文章給大家參考一下,希望大家閱讀完這篇文章后大有收獲,下面讓我們一起去了解一下吧!
站在用戶的角度思考問(wèn)題,與客戶深入溝通,找到壽陽(yáng)網(wǎng)站設(shè)計(jì)與壽陽(yáng)網(wǎng)站推廣的解決方案,憑借多年的經(jīng)驗(yàn),讓設(shè)計(jì)與互聯(lián)網(wǎng)技術(shù)結(jié)合,創(chuàng)造個(gè)性化、用戶體驗(yàn)好的作品,建站類(lèi)型包括:網(wǎng)站建設(shè)、成都網(wǎng)站建設(shè)、企業(yè)官網(wǎng)、英文網(wǎng)站、手機(jī)端網(wǎng)站、網(wǎng)站推廣、主機(jī)域名、網(wǎng)站空間、企業(yè)郵箱。業(yè)務(wù)覆蓋壽陽(yáng)地區(qū)。
具體內(nèi)容如下
1.效果圖:
2.引用公共庫(kù):builder.radle,在app目錄下
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.清單文件,拍照權(quán)限申請(qǐng)
4.主界面:
package com.example.administrator.testz; import android.Manifest; import android.app.Activity; import android.content.ActivityNotFoundException; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.PackageManager; import android.content.res.Resources; import android.net.Uri; import android.os.Bundle; import android.os.PersistableBundle; import android.os.Vibrator; import android.util.Log; import android.util.SparseArray; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.widget.TextView; import com.google.android.gms.vision.CameraSource; import com.google.android.gms.vision.Detector; import com.google.android.gms.vision.barcode.Barcode; import com.google.android.gms.vision.barcode.BarcodeDetector; import java.io.IOException; import java.util.ArrayList; import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity; import androidx.core.app.ActivityCompat; public class MainActivity extends AppCompatActivity { SurfaceView surfaceView; CameraSource cameraSource; TextView qrCodeText; BarcodeDetector barcodeDetector; public static ArrayListscannList; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); surfaceView = (SurfaceView) findViewById(R.id.qrView); qrCodeText = (TextView) findViewById(R.id.tv); scannList = new ArrayList<>(); barcodeDetector = new BarcodeDetector.Builder(this) .setBarcodeFormats(Barcode.QR_CODE) .build(); cameraSource = new CameraSource.Builder(this, barcodeDetector) .setRequestedPreviewSize(640, 480) .setAutoFocusEnabled(true) .build(); surfaceView.getHolder().addCallback(new SurfaceHolder.Callback() { @Override public void surfaceCreated(SurfaceHolder holder) { if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { return; } try { cameraSource.start(holder); } catch (IOException e) { e.printStackTrace(); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } @Override public void surfaceDestroyed(SurfaceHolder holder) { cameraSource.stop(); } }); barcodeDetector.setProcessor(new Detector.Processor () { @Override public void release() { } @Override public void receiveDetections(Detector.Detections detections) { final SparseArray qrCode = detections.getDetectedItems(); if (qrCode.size() != 0) { qrCodeText.post(new Runnable() { @Override public void run() { qrCodeText.setText(qrCode.valueAt(0).displayValue); addInList(qrCode.valueAt(0).displayValue); } }); } } }); } private void addInList(String scannResult) { if (scannList.isEmpty()) { scannList.add(scannResult); } else { String a = scannList.get(scannList.size() - 1); if (!a.equals(scannResult)) { scannList.add(scannResult); } } for (String s : scannList) { Log.e("s", "onCreate: " + s); } Log.e("size", "addInList: " + scannList.size()); } @Override protected void onDestroy() { super.onDestroy(); } }
5.布局頁(yè)面:
以上是“Android怎么實(shí)現(xiàn)掃描二維碼功能”這篇文章的所有內(nèi)容,感謝各位的閱讀!相信大家都有了一定的了解,希望分享的內(nèi)容對(duì)大家有所幫助,如果還想學(xué)習(xí)更多知識(shí),歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道!