第一步导依赖

implementation 'cn.yipianfengye.android:zxing-library:2.2'

还有在android里buildTypes下面加 目的是防止版本出错

configurations.all {resolutionStrategy.eachDependency {  details ->def requested = details.requestedif (requested.group == 'com.android.support') {if (!requested.name.startsWith("multidex")) {details.useVersion '28.0.0'}}}}

第三步网络权限

第四步创建一个全局类

import android.app.Application;import com.uuzuche.lib_zxing.activity.ZXingLibrary;/*Time:2019/5/10*Author:zhaozhiwei*Description:*/
public class aolc extends Application {@Overridepublic void onCreate() {super.onCreate();ZXingLibrary.initDisplayOpinion(this);}
}

然后看主页面干货代码

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.PermissionChecker;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;import com.uuzuche.lib_zxing.activity.CaptureActivity;
import com.uuzuche.lib_zxing.activity.CodeUtils;public class MainActivity extends AppCompatActivity {private Button button;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button = findViewById(R.id.mButton);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//检测相机权限if (!checkCameraPersion()){//如果不允许//我们就要请求相机权限requestCameraPermission();}else{doScan();//开启摄像头扫描}}});}@Overrideprotected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {super.onActivityResult(requestCode, resultCode, data);//获取扫描结果//判断请求码if (requestCode==101){//判断数据是否为空if (data!=null){Bundle bundle = data.getExtras();if (bundle==null){return;}if (bundle.getInt(CodeUtils.RESULT_TYPE)==CodeUtils.RESULT_SUCCESS){//获取最终扫描数据String result = bundle.getString(CodeUtils.RESULT_STRING);Toast.makeText(this,result.toString(),Toast.LENGTH_LONG).show();}else if (bundle.getInt(CodeUtils.RESULT_TYPE)==CodeUtils.RESULT_FAILED){Toast.makeText(this,"错误",Toast.LENGTH_LONG).show();}}else {Toast.makeText(this,"数据为空",Toast.LENGTH_LONG).show();}}}/*** 检测相机权限* @return true 允许 false 不允许*/private boolean checkCameraPersion(){//返回当前应用是否允许使用Manifest.permission.CAMERA权限return PermissionChecker.checkSelfPermission(this,Manifest.permission.CAMERA)== PackageManager.PERMISSION_GRANTED;}/*** 请求相机权限*/private void requestCameraPermission(){ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.CAMERA},100);}/*** 开启扫描*/private void doScan(){Intent intent = new Intent(MainActivity.this, CaptureActivity.class);startActivityForResult(intent,101);}}

告辞