一個簡單的佈局

第一步:新增依賴
//二維碼依賴

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

這時候你要新增進去的話會有一個版本衝突,下面解決V4、V7版本衝突

//解決V4、V7版本衝突
    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'
                }
            }
        }
    }	
 

第二步新增許可權

<!-- 二維碼需要的許可權 -->
    <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" />
 

第三步在類繼承Application中初始化二維碼工具

//需要在清單檔案註冊
public class MyApplication extends Application {

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

        //初始化二維碼工具類
        ZXingLibrary.initDisplayOpinion(this);

    }
}

第四步:佈局,很簡單就2個按鈕

第五步:開始寫MainActivity

public class MainActivity extends AppCompatActivity {

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

    //相應狀態碼
    private static final int RESPON_CODE = 5 ;

    //點選事件
    public void co(View view) {
        //跳轉到掃描二維碼介面操作
        Intent intent = new Intent(MainActivity.this,CaptureActivity.class);
        startActivityForResult(intent,RESPON_CODE);
    }

    //為了方便接收所以需要onActivityResult分別進行處理
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        //處理二維碼掃描結果,對狀態碼進行判斷
        if(requestCode == RESPON_CODE){

            //處理掃描結果(在介面上顯示)
            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, "解析結果:"+result, Toast.LENGTH_SHORT).show();

                }else if(bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED){
                    Toast.makeText(MainActivity.this , "解析二維碼失敗", Toast.LENGTH_SHORT).show();
                }

            }
        }

    }

    /*
    * 跳到生成二維碼圖片的地方
    * */
    public void cod(View view) {
        startActivity(new Intent(MainActivity.this,QRCodeActivity.class));
        finish();
    }
}
 

第六步:跳轉到生成二維碼的Actvity

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

    //帶log二維碼,兩個點選事件
    public void logB(View view) {
        //獲取輸入框的內容
        String textContent = mEditText.getText().toString();
        //判斷是否為空
        if(TextUtils.isEmpty(textContent)){
            Toast.makeText(this, "輸入的為空", Toast.LENGTH_SHORT).show();
            return;
        }
        mEditText.setText("");

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

        mImageView.setImageBitmap(mBitmap);
    }

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

        //獲取輸入框的內容
        String textContent = mEditText.getText().toString();

        //判斷是否為空
        if(TextUtils.isEmpty(textContent)){
            Toast.makeText(this, "輸入的為空", Toast.LENGTH_SHORT).show();
            return;
        }

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

佈局還是特別簡單的