Android 集成二維碼掃描功能

實現效果：

實現步驟：

1.Gradle添加二維碼包引用。

implementation 'cn.bingoogolapple:bga-qrcode-zbar:1.3.7'

添加好後，點擊右上角的“Sync Now”

2.AndroidManifest.xml 增加相關權限配置。

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

3.測試Activity代碼：page_qr.xml

<?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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginBottom="50dp"
    android:orientation="vertical">

    <cn.bingoogolapple.qrcode.zbar.ZBarView
        android:id="@+id/zbarview"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_gravity="center"
        android:layout_marginTop="20dp"
        android:layout_marginBottom="40dp"

        app:qrcv_animTime="1000"
        app:qrcv_barCodeTipText="將條碼放入框內，即可自動掃描"
        app:qrcv_barcodeRectHeight="120dp"
        app:qrcv_borderColor="@android:color/white"
        app:qrcv_borderSize="1dp"
        app:qrcv_cornerColor="@color/colorPrimaryDark"
        app:qrcv_cornerLength="20dp"
        app:qrcv_cornerSize="3dp"
        app:qrcv_isBarcode="false"
        app:qrcv_isOnlyDecodeScanBoxArea="false"
        app:qrcv_isShowDefaultGridScanLineDrawable="true"
        app:qrcv_isShowDefaultScanLineDrawable="true"
        app:qrcv_isShowLocationPoint="true"
        app:qrcv_isShowTipBackground="true"
        app:qrcv_isShowTipTextAsSingleLine="false"
        app:qrcv_isTipTextBelowRect="true"
        app:qrcv_maskColor="#33FFFFFF"
        app:qrcv_qrCodeTipText="掃碼二維嗎"
        app:qrcv_rectWidth="200dp"
        app:qrcv_scanLineColor="@color/colorPrimaryDark"
        app:qrcv_toolbarHeight="0dp"
        app:qrcv_topOffset="0dp"
        app:qrcv_verticalBias="-1" />

    <Button
        android:id="@+id/start_spot"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="開始掃碼" />

    <Button
        android:id="@+id/stop_spot"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="暫停掃碼" />

    <Button
        android:id="@+id/open_flashlight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="開燈" />

    <Button
        android:id="@+id/close_flashlight"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="關燈" />

    <TextView
        android:id="@+id/txtText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

注意：頂部申明許加上 xmlns:app="http://schemas.android.com/apk/res-auto" 這是自定義控件需要申明的命名空間。

4.後置代碼 Page_QR.java

package com.example.rc114.ui;

import android.Manifest;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Vibrator;
import android.provider.Settings;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import com.example.rc114.R;

import java.util.ArrayList;
import java.util.List;

import cn.bingoogolapple.qrcode.core.QRCodeView;
import cn.bingoogolapple.qrcode.zbar.ZBarView;

public class Page_QR extends AppCompatActivity {
    QRCodeView qrCodeView;
    String[] permissions = new String[]{
            Manifest.permission.CAMERA,
            Manifest.permission.VIBRATE
    };
    private final int permissionCode = 100;//權限請求碼

    //檢查權限
    private void checkPermission() {
        List<String> permissionList = new ArrayList<>();
        for (int i = 0; i < permissions.length; i++) {
            if (ContextCompat.checkSelfPermission(this, permissions[i]) != PackageManager.PERMISSION_GRANTED) {
                permissionList.add(permissions[i]);
            }
        }
        if (permissionList.size() <= 0) {
            //說明權限都已經通過，可以做你想做的事情去
            bindEvent();
        } else {
            //存在未允許的權限
            ActivityCompat.requestPermissions(this, permissions, permissionCode);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        boolean haspermission = false;
        if (permissionCode == requestCode) {
            for (int i = 0; i < grantResults.length; i++) {
                if (grantResults[i] == -1) {
                    haspermission = true;
                }
            }
            if (haspermission) {
                //跳轉到系統設置權限頁面，或者直接關閉頁面，不讓他繼續訪問
                permissionDialog();
            } else {
                //全部權限通過，可以進行下一步操作
                bindEvent();
            }
        }
    }

    AlertDialog alertDialog;

    //打開手動設置應用權限
    private void permissionDialog() {
        if (alertDialog == null) {
            alertDialog = new AlertDialog.Builder(this)
                    .setTitle("提示信息")
                    .setMessage("當前應用缺少必要權限，該功能暫時無法使用。如若需要，請單擊【確定】按鈕前往設置中心進行權限授權。")
                    .setPositiveButton("設置", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            cancelPermissionDialog();
                            Uri packageURI = Uri.parse("package:" + getPackageName());
                            Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, packageURI);
                            startActivity(intent);
                        }
                    })
                    .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            cancelPermissionDialog();
                        }
                    })
                    .create();
        }
        alertDialog.show();
    }

    private void cancelPermissionDialog() {
        alertDialog.cancel();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.page_qr);

        //6.0才用動態權限
        if (Build.VERSION.SDK_INT >= 23) {
            checkPermission();
        } else {
            bindEvent();
        }
    }

    private void bindEvent() {
        qrCodeView = (ZBarView) findViewById(R.id.zbarview);
        qrCodeView.setDelegate(new QRCodeView.Delegate() {
            @Override
            public void onScanQRCodeSuccess(String result) {
                vibrate();//震動手機
                //掃描成功後處理事件
                Toast.makeText(Page_QR.this, result, Toast.LENGTH_SHORT).show();
                qrCodeView.startSpot();//繼續掃描
                TextView txtText = (TextView) findViewById(R.id.txtText);
                txtText.setText(result);
            }

            @Override
            public void onCameraAmbientBrightnessChanged(boolean isDark) {
                // 這裏是通過修改提示文案來展示環境是否過暗的狀態，接入方也可以根據 isDark 的值來實現其他交互效果
                String tipText = qrCodeView.getScanBoxView().getTipText();
                String ambientBrightnessTip = "\n環境過暗，請打開閃光燈";
                if (isDark) {
                    if (!tipText.contains(ambientBrightnessTip)) {
                        qrCodeView.getScanBoxView().setTipText(tipText + ambientBrightnessTip);
                    }
                } else {
                    if (tipText.contains(ambientBrightnessTip)) {
                        tipText = tipText.substring(0, tipText.indexOf(ambientBrightnessTip));
                        qrCodeView.getScanBoxView().setTipText(tipText);
                    }
                }
            }

            @Override
            public void onScanQRCodeOpenCameraError() {
                Toast.makeText(Page_QR.this, "錯誤", Toast.LENGTH_SHORT).show();
            }
        });
        qrCodeView.startCamera();

        findViewById(R.id.start_spot).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onStart();
                Toast.makeText(Page_QR.this, "開始掃碼", Toast.LENGTH_SHORT).show();
            }

        });

        findViewById(R.id.stop_spot).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                onStop();
                Toast.makeText(Page_QR.this, "停止掃碼", Toast.LENGTH_SHORT).show();
            }
        });

        findViewById(R.id.open_flashlight).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                qrCodeView.openFlashlight();
                Toast.makeText(Page_QR.this, "打開閃光燈", Toast.LENGTH_SHORT).show();
            }
        });

        findViewById(R.id.close_flashlight).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                qrCodeView.closeFlashlight();
                Toast.makeText(Page_QR.this, "關閉閃光燈", Toast.LENGTH_SHORT).show();
            }
        });
    }

    @Override
    protected void onStart() {
        super.onStart();
        qrCodeView.startCamera();//打開後置攝像頭開始預覽，但是並未開始識別
        qrCodeView.startSpotAndShowRect(); // 顯示掃描框，並開始識別

//        mQRCodeView.showScanRect();//顯示掃描框
//        mQRCodeView.startSpot();//開始識別二維碼
        //mQRCodeView.openFlashlight();//開燈
        //mQRCodeView.closeFlashlight();//關燈
    }

    @Override
    protected void onStop() {
        qrCodeView.stopCamera();// 關閉攝像頭預覽，並且隱藏掃描框
        super.onStop();
    }

    @Override
    protected void onDestroy() {
        qrCodeView.onDestroy();
        super.onDestroy();
    }

    private void vibrate() {
        Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
        vibrator.vibrate(200);
    }

}

參考：https://www.jianshu.com/p/b55808410cd7