无法从ZXing调用IntentIntegrator类?

时间:2019-03-13 01:55:30

标签: android

Android新手在这里。我最近开始构建条形码扫描仪应用程序,但偶然发现了这个video。但是,当IntentIntegrator类出现时,我在观看视频时遇到问题。即使我已经在build.gradle(Module:app)中实现了ZXing,我的代码似乎也无法导入该类。

这是我的build.gradle(Module.app)代码:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.scanner4"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.journeyapps:zxing-android-embedded:3.2.0@arr'
    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'
}

这是我的MainActivity.java代码:

package com.example.scanner4;

import android.app.Activity;
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;

public class MainActivity extends AppCompatActivity {
    private Button scan_btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        scan_btn = (Button) findViewById(R.id.scan_btn);
        final Activity activity = this;

        scan_btn.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view){
                IntentIntegrator integrator = new IntentIntegrator(activity);
                integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
                integrator.setPrompt("Scan");
                integrator.setCameraId(0);
                integrator.setBeepEnabled(false);
                integrator.setBarcodeImageEnabled(false);
                integrator.initiateScan();
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data){
        IntentResult result = IntentIntegrator.parseActivityResult(requestCode,resultCode,data);
        if(result != null){
            if(result.getContent() != null){
                Toast.makeText(this,"You cancelled the scanning", Toast.LENGTH_LONG).show();
            }
            else{
                Toast.makeText(this,result.getContents(), Toast.LENGTH_LONG).show();
            }
        }
        else{
            super.onActivityResult(requestCode, resultCode, data);
        }


    }
}

我的问题出在线路上

IntentIntegrator integrator = new IntentIntegrator(activity);

由于我是Android的全新用户,因此非常感谢您的帮助。请原谅我的经验不足,因为我找不到这个简单问题的解决方案。

1 个答案:

答案 0 :(得分:1)

问题:此行使您的应用无法解析IntentIntegrator

implementation 'com.journeyapps:zxing-android-embedded:3.2.0@arr'

要在gradle中导入Android存档库(aar),则必须 @aar 而不是 @arr

解决方案::将gradle文件中的依赖项更改为

implementation 'com.journeyapps:zxing-android-embedded:3.2.0@aar'