Android简单模仿微信扫一扫二维码

android一般都是使用ZXing Android Embedded这个库来进行二维码操作!,我以前也没弄过这个,也有一些不错第三方库,也是看别人的博客现在第一次弄各位大佬有提议的可以说

二维码处理分为两部分：编码与解码

编码：使用字符串生成图片。
解码：解析图片中的字符串。

首先看一下效果:

添加依赖

implementation 'com.journeyapps:zxing-android-embedded:3.6.0'
implementation 'com.google.zxing:core:3.3.0'

Activity

 boolean isTure=true,isFalse=true;
 String[] pers;
  pers=new String[]{Manifest.permission.CAMERA};

        if(Build.VERSION_CODES.M>22){
            for (int i = 0; i 22){
//            if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)!= PackageManager.PERMISSION_GRANTED){
//                ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.CAMERA},1);
//            }else{
//
//            }
//        }else{
//
//        }

在Activity中自己定义一个按钮

button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                IntentIntegrator intentIntegrator = new IntentIntegrator(MainActivity.this);
                intentIntegrator.setDesiredBarcodeFormats(IntentIntegrator.ALL_CODE_TYPES);//扫码的类型,可选：一维码，二维码
                intentIntegrator.setPrompt("请对准二维码");//提示语
                intentIntegrator.setBeepEnabled(true);//扫完之后 叮的一声
                intentIntegrator.setCaptureActivity(ScanActivity.class);////自定义扫码界面
                intentIntegrator.initiateScan();//初始化扫码
            }
        });




  @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
        if(result!=null){
            if(result.getContents()==null){
                Toast.makeText(this, "取消", Toast.LENGTH_SHORT).show();
                Log.e("##","失败");
            }else{
                Toast.makeText(this, "成功"+result.getContents(), Toast.LENGTH_SHORT).show();
                Log.e("##","成功!");
            }
        }else{
            super.onActivityResult(requestCode,resultCode,data);
        }
    }

    @SuppressLint("NewApi")
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

        switch (requestCode){
            case 1:
                if(grantResults.length>0&&grantResults[0]==PackageManager.PERMISSION_GRANTED){

                    //有权限
                }else{
                    Toast.makeText(this, "请手动打开相机权限", Toast.LENGTH_SHORT).show();
                }

                break;

            case 100:
                for (int i = 0; i 

自定义一个merge标签 xml文件

自定义扫码布局文件

自定义扫码的Activity

 CaptureManager captureManager;
    ImageButton imageButton;
    DecoratedBarcodeView barcodeView;
    boolean bTorch=false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_scan);

        barcodeView=findViewById(R.id.dbv);
        imageButton=findViewById(R.id.but_light);
        barcodeView.setTorchListener(new DecoratedBarcodeView.TorchListener() {
            @SuppressLint("NewApi")
            @Override
            public void onTorchOn() {
                imageButton.setBackground(getResources().getDrawable(R.drawable.flashlight_open));
                bTorch=true;
            }

            @SuppressLint("NewApi")
            @Override
            public void onTorchOff() {
              imageButton.setBackground(getResources().getDrawable(R.drawable.flashlight_close));
                bTorch = false;
            }
        });

//打开闪光灯
        imageButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(bTorch){
                    barcodeView.setTorchOff();
                }else{
                    barcodeView.setTorchOn();
                }
            }
        });

        captureManager=new CaptureManager(this,barcodeView);
        captureManager.initializeFromIntent(getIntent(),savedInstanceState);
        captureManager.decode();
    }

    @Override
    protected void onResume() {
        super.onResume();
        captureManager.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        captureManager.onPause();
        barcodeView.setTorchOff();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        captureManager.onDestroy();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        captureManager.onSaveInstanceState(outState);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode,  String permissions[],  int[] grantResults) {
        captureManager.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        return barcodeView.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event);
    }