二维码扫描Zxing简单使用

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.requested
            if (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 {
    @Override
    public 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;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = findViewById(R.id.mButton);


        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public 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
                }

            }
        });

    }

    @Override
    protected 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