今天成功完成二维码扫描程序， 利用zxing

利用的网上参考文档是https://blog.csdn.net/gorky_19/article/details/78454030，里面介绍了如何修改build.gradle的dependency 和源代码

不需要加入zxing.jar ,在build.gradle里面加入dependency 之后，android studio直接从互联网相应网站，直接获取相应的jar文件

在build.gradle(module:app)里面加入

compile 'com.journeyapps:zxing-android-embedded:2.3.0@aar'
compile 'com.journeyapps:zxing-android-legacy:2.3.0@aar'
compile 'com.journeyapps:zxing-android-integration:2.3.0@aar'

加入位置是dependencys

加入后如下

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
    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'
    implementation files('libs/core-3.3.2.jar')
    compile 'com.journeyapps:zxing-android-embedded:2.3.0@aar'
    compile 'com.journeyapps:zxing-android-legacy:2.3.0@aar'
    compile 'com.journeyapps:zxing-android-integration:2.3.0@aar'
}

源代码如下

package com.strongdady.zxingtest;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import android.content.Intent;

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

public class MainActivity extends AppCompatActivity {

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

IntentIntegrator integrator=new IntentIntegrator(MainActivity.this);

integrator.initiateScan();

}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
IntentResult scanResult =IntentIntegrator.parseActivityResult(requestCode,resultCode,data);
if (scanResult !=null){
String result=scanResult.getContents();
Toast.makeText(this,result,Toast.LENGTH_LONG).show();
}
}
}