生成二维码点击扫一扫

依赖

 implementation 'cn.bingoogolapple:bga-qrcode-zxing:1.3.4'	

Fragment

public class FragmentMy extends Fragment{
	    private ImageView imageView;
	    private Button search_button;
	    @Nullable
	    @Override
	    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
	        View view=inflater.inflate(R.layout.my,container,false);
	        imageView=view.findViewById(R.id.imageView);
	        search_button=view.findViewById(R.id.search_button);
	        return view;
	    }

@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    inif();
    search_button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent=new Intent(getActivity(),MyScanActivity.class);
            startActivity(intent);
        }
    });
}

private void inif() {
    String name = ((SuccessActivity) getActivity()).setName();
    QRText qrText=new QRText(getActivity(),imageView,name);
    qrText.execute(name);
}

class QRText extends AsyncTask{
     private WeakReference mimageView ;
    private WeakReference mcontext;
   public QRText(Context context,ImageView imageView,String name){
       mcontext=new WeakReference<>(context);
       mimageView=new WeakReference<>(imageView);
   }
     @Override
     protected Bitmap doInBackground(String... strings) {
         String s = strings[0];
         if (TextUtils.isEmpty(s)){
             return null;
         }
         int size = mcontext.get().getResources().getDimensionPixelOffset(R.dimen.ss);
           return QRCodeEncoder.syncEncodeQRCode(s,size);
     }

     @Override
     protected void onPostExecute(Bitmap bitmap) {
         super.onPostExecute(bitmap);
         if (bitmap!=null){
             mimageView.get().setImageBitmap(bitmap);
         }else{
             Toast.makeText(mcontext.get(),"失败",Toast.LENGTH_SHORT).show();
         }
     }
 }
}

跳转扫一扫

public class ScanActivity extends AppCompatActivity implements QRCodeView.Delegate {

private ZXingView mZXingView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scan);
    mZXingView = findViewById(R.id.zxingview);
    mZXingView.setDelegate(this);
}

@Override
protected void onResume() {
    super.onResume();
    mZXingView.startCamera();
    mZXingView.startSpotAndShowRect();
}

@Override
protected void onStop() {
    super.onStop();
    mZXingView.stopCamera();
}

@Override
protected void onDestroy() {
    super.onDestroy();
    mZXingView.onDestroy();
    Toast.makeText(ScanActivity.this,11+"",Toast.LENGTH_SHORT).show();
}

@Override
public void onScanQRCodeSuccess(String result) {
    if(result!=null){
        Intent intent=new Intent(ScanActivity.this,ContentActivity.class);
        intent.putExtra("result",result);
        startActivity(intent);
    }
    Toast.makeText(ScanActivity.this,result,Toast.LENGTH_SHORT).show();
}

@Override
public void onCameraAmbientBrightnessChanged(boolean isDark) {

}

@Override
public void onScanQRCodeOpenCameraError() {

}

布局

  

  Intent intent1=getIntent();
    String name = intent1.getStringExtra("name");
     getname(name);
}
public static String getname(String name){

    return name;
}

}