使用依赖(ZXing)简单的实现二维码的扫描和生成

一个简单的布局

第一步:添加依赖
//二维码依赖

 implementation 'cn.yipianfengye.android:zxing-library:2.1'

这时候你要添加进去的话会有一个版本冲突,下面解决V4、V7版本冲突

//解决V4、V7版本冲突
    configurations.all {
        resolutionStrategy.eachDependency { DependencyResolveDetails details ->
            def requested = details.requested
            if (requested.group == 'com.android.support') {
                if (!requested.name.startsWith("multidex")) {
                    details.useVersion '27.1.1'
                }
            }
        }
    }	

第二步添加权限

<!-- 二维码需要的权限 -->
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.FLASHLIGHT" />
    <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.INTERNET" />

第三步在类继承Application中初始化二维码工具

//需要在清单文件注册
public class MyApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        //初始化二维码工具类
        ZXingLibrary.initDisplayOpinion(this);

    }
}

第四步:布局,很简单就2个按钮

第五步:开始写MainActivity

public class MainActivity extends AppCompatActivity {

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

    //相应状态码
    private static final int RESPON_CODE = 5 ;

    //点击事件
    public void co(View view) {
        //跳转到扫描二维码界面操作
        Intent intent = new Intent(MainActivity.this,CaptureActivity.class);
        startActivityForResult(intent,RESPON_CODE);
    }

    //为了方便接收所以需要onActivityResult分别进行处理
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //处理二维码扫描结果,对状态码进行判断
        if(requestCode == RESPON_CODE){

            //处理扫描结果(在界面上显示)
            if(null != data){
                //
                Bundle bundle = data.getExtras();

                if(bundle == null){
                    return;
                }

                if(bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_SUCCESS){

                    String result = bundle.getString(CodeUtils.RESULT_STRING);
                    Toast.makeText(this, "解析结果:"+result, Toast.LENGTH_SHORT).show();

                }else if(bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED){
                    Toast.makeText(MainActivity.this , "解析二维码失败", Toast.LENGTH_SHORT).show();
                }

            }
        }

    }

    /*
    * 跳到生成二维码图片的地方
    * */
    public void cod(View view) {
        startActivity(new Intent(MainActivity.this,QRCodeActivity.class));
        finish();
    }
}

第六步:跳转到生成二维码的Actvity

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_qrcode);
        //找控件
        mEditText = findViewById(R.id.editText);
        mLogBtn = findViewById(R.id.logBtn);
        mPtBtn = findViewById(R.id.ptBtn);
        mImageView = findViewById(R.id.imageView);
    }

    //带log二维码,两个点击事件
    public void logB(View view) {
        //获取输入框的内容
        String textContent = mEditText.getText().toString();
        //判断是否为空
        if(TextUtils.isEmpty(textContent)){
            Toast.makeText(this, "输入的为空", Toast.LENGTH_SHORT).show();
            return;
        }
        mEditText.setText("");

        mBitmap = CodeUtils.createImage(textContent, 400, 400, BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher));

        mImageView.setImageBitmap(mBitmap);
    }

    //不带log
    public void ptB(View view) {

        //获取输入框的内容
        String textContent = mEditText.getText().toString();

        //判断是否为空
        if(TextUtils.isEmpty(textContent)){
            Toast.makeText(this, "输入的为空", Toast.LENGTH_SHORT).show();
            return;
        }

        mEditText.setText("");
        Bitmap bitmap = CodeUtils.createImage(textContent, 400, 400, null);
        mImageView.setImageBitmap(bitmap);
    }

布局还是特别简单的