如何在 Zxing 扫描仪相机视图中添加按钮？

Question

我当前的 Zxing 扫描仪屏幕如下所示，

我想在上面添加一个文本视图和几个按钮，我尝试了很多程序，但没有任何效果，任何人都可以指导我，我将虚心期待您的帮助

这是代码

Java 文件：

    private ZXingScannerView mScannerView;
    @Override
    public void onCreate(Bundle state) {
        super.onCreate(state);
        setContentView(R.layout.activity_qrresult);
        mScannerView = new ZXingScannerView(this); 
        setContentView(mScannerView);              


    }

    @Override
    public void onResume() {
        super.onResume();
        mScannerView.setResultHandler(this); 
        mScannerView.startCamera();          
        Toast.makeText(getApplicationContext(),"Scan QR code to Send 
     Money",Toast.LENGTH_LONG).show();
    }

    @Override
    public void onPause() {
        super.onPause();
        mScannerView.stopCamera();           // Stop camera on pause
    }

    @Override
    public void handleResult(Result rawResult) {
        // Do something with the result here
        if(rawResult.getText().toString().equals("Test Ewallet Test")){
            Toast.makeText(getApplicationContext(), rawResult.getText(), 
    Toast.LENGTH_SHORT).show();
            Intent go = new Intent(qrresult.this,sendmoney.class);
            startActivity(go);

        }else {
            Toast.makeText(getApplicationContext(), "Couldn't scan the 
     QRcode, Please Try again ", Toast.LENGTH_SHORT).show();

            mScannerView.resumeCameraPreview(this);
        }



        // mScannerView.resumeCameraPreview(this);

        // If you would like to resume scanning, call this method below:
        //mScannerView.resumeCameraPreview(this);
    }
}

这是 xml 文件

 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.tajveezrehman.applicationtest.yourqr">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true">

    <Button
        android:id="@+id/flashlight"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.8"
        android:text="Button" />

    <Button
        android:id="@+id/open image"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.8"
        android:text="Button" />

    <TextView
        android:id="@+id/camtxt"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="20dp"
        android:layout_weight="0.8"
        android:text="@string/scanner"
        android:textAlignment="center"
        android:textColor="#000000"
        android:textSize="20sp" />

  </LinearLayout>

 </RelativeLayout>

Answer 1

使用

RelativeLayout

，如下所示：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<me.dm7.barcodescanner.zxing.ZXingScannerView
    android:id="@+id/zxscan"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
   />

<ImageView
    android:id="@+id/btn_flash"
    android:layout_marginBottom="15dp"
    android:layout_centerHorizontal="true"
    android:layout_alignParentBottom="true"
    android:src="@drawable/flash_100"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

它看起来像：

Answer 2

我尝试直接通过代码添加按钮和文本，但它们从未显示在屏幕上。

所以我所做的是创建一个活动activity_barcode.xml。

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.google.android.material.appbar.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </com.google.android.material.appbar.AppBarLayout>

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab_action"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_marginEnd="@dimen/fab_margin"
        android:contentDescription="@string/add_claim"
        android:src="@drawable/ic_add_white_24dp"
        android:tint="@android:color/white"
        app:backgroundTint="@color/colorAccent"
        app:elevation="6dp"
        app:pressedTranslationZ="12dp"
        app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:tint="@android:color/white" />

    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>

这是我的 BracodeActivity

public class BarcodeActivity extends BaseActivity {

    private FloatingActionButton fab;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_barcode);
        fab = findViewById(R.id.fab_action);

        fab.setOnClickListener(v -> Toast.makeText(this, "Excellent!!!", Toast.LENGTH_SHORT).show());

        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        setupToolbar(getResources().getString(R.string.app_name), DEFAULT);

        BarcodeFragment barcodeFragment = new BarcodeFragment();

        getSupportFragmentManager().beginTransaction()
                .replace(R.id.content_frame, barcodeFragment)
                .commit();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
            return true;
        } else {
            return super.onOptionsItemSelected(item);
        }
    }
}

并且该库已添加到片段 BacodeFragment 中

public class BarcodeFragment extends Fragment implements ZXingScannerView.ResultHandler {

    private ZXingScannerView mScannerView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public void onResume() {
        super.onResume();
        mScannerView.setResultHandler(this);
        mScannerView.startCamera();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        mScannerView = new ZXingScannerView(getActivity());
        return mScannerView;
    }

    @Override
    public void handleResult(Result rawResult) {
        String result = rawResult.getText();
        Intent data = new Intent();

        if (result == null || result.isEmpty()) {
            getActivity().setResult(RESULT_CANCELED);
        } else {
            data.putExtra(SCAN_RESULT, result);
            getActivity().setResult(CommonStatusCodes.SUCCESS, data);
        }

        getActivity().finish();

    }
}