Android二维码条形码扫描_android 二维码扫描扫不出过长的条形码

Android二维码条形码扫描

1、下载zxing精简库zxing-android-embedded，版本任意

地址：https://github.com/journeyapps/zxing-android-embedded/releases/tag/v4.3.0

2、新建项目后添加权限

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.FLASHLIGHT" />
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3、添加以下依赖到build.gradle下的dependencies中

    implementation 'com.journeyapps:zxing-android-embedded:4.3.0'
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4、复制zxing-android-embedded下zxing-android-embedded\src中的com文件夹到项目中app\src\main\java下和新项目包同级

5、关闭项目重新打开，等待下载完成

6、主页布局代码activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/sm"
            android:text="扫描"
            />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/result"
            android:text="无数据"
            />
    </LinearLayout>

</LinearLayout>
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7、扫描页布局代码activity_capture.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:gravity="center_horizontal"
    android:orientation="vertical">

    <com.journeyapps.barcodescanner.DecoratedBarcodeView
        android:id="@+id/dbv_custom"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:zxing_preview_scaling_strategy="fitXY" />
</LinearLayout>
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8、MainActivity.java主页和扫描结果显示代码

package cn.yang.codescan;

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;

import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;

public class MainActivity extends AppCompatActivity {
    private TextView results;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.sm).setOnClickListener(view -> initScan());
        results=(TextView) findViewById(R.id.result);
    }

    public void initScan() {
        results.setText("");
        IntentIntegrator integrator = new IntentIntegrator(this);
        // 设置要扫描的条码类型，ONE_D_CODE_TYPES：一维码，QR_CODE_TYPES-二维码
        //不设置则表示都扫描
        //integrator.setDesiredBarcodeFormats(ONE_D_CODE_TYPES);
        integrator.setDesiredBarcodeFormats();
        integrator.setCaptureActivity(CaptureActivity.class); //设置打开摄像头的Activity
        integrator.setPrompt("请对准二维码"); //底部的提示文字，设为""可以置空
        integrator.setCameraId(0); //前置或者后置摄像头
        integrator.setBeepEnabled(false); //扫描成功的「哔哔」声，默认开启
        integrator.setBarcodeImageEnabled(true);
        integrator.initiateScan();
    }

	//获取返回结果
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);
        if (requestCode == IntentIntegrator.REQUEST_CODE) {
            IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
            if (scanResult != null && scanResult.getContents() != null) {
                String result = scanResult.getContents();
                //Log.i("扫码返回: ", result);
                results.setText(result);
            }
            else {
            Toast.makeText(this,"无数据",Toast.LENGTH_LONG).show();
            }
        }
    }
}
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9、CaptureActivity.java扫描功能代码

package cn.yang.codescan;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.view.KeyEvent;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import com.journeyapps.barcodescanner.CaptureManager;
import com.journeyapps.barcodescanner.DecoratedBarcodeView;

public class CaptureActivity extends AppCompatActivity {
    private CaptureManager capture;
    private DecoratedBarcodeView barcodeScannerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_capture);
        barcodeScannerView = (DecoratedBarcodeView) findViewById(R.id.dbv_custom);

        capture = new CaptureManager(this, barcodeScannerView);
        capture.initializeFromIntent(getIntent(), savedInstanceState);
        capture.decode();
    }

    @Override
    protected void onResume() {
        super.onResume();
        capture.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        capture.onPause();
    }

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

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        capture.onSaveInstanceState(outState);
    }

    @SuppressLint("MissingSuperCall")
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
        capture.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        return barcodeScannerView.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event);
    }
}
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