切换摄像头方向的方法;

app/src/main/java/com/xingdata/zzdpos/ui/scan/ScanFragment.java

 package com.xingdata.zzdpos.ui.scan;
 
 import android.content.Context;
+import android.hardware.camera2.CameraManager;
 import android.os.Handler;
 import android.view.View;
 import android.view.ViewStub;
@@ -17,6 +18,7 @@ import me.dm7.barcodescanner.zxing.ZXingScannerView;
 
 public class ScanFragment<P extends BasePresenter> extends BaseFragment<P, FragmentStoreScanBinding> {
 
+    private CameraManager mCameraManager;
     private ZXingScannerView mScannerView;
     private ZXingScannerView.ResultHandler mResultHandler;
     private String titleStr = "";
@@ -57,6 +59,8 @@ public class ScanFragment<P extends BasePresenter> extends BaseFragment<P, Fragm
 
     @Override
     public void initView() {
+        mCameraManager = (CameraManager) mContext.getSystemService(Context.CAMERA_SERVICE);
+
         if (!titleStr.equals("")) {
             viewStub = mViewBinding.vsTitle.getViewStub();
             inflated = viewStub.inflate();
@@ -84,12 +88,38 @@ public class ScanFragment<P extends BasePresenter> extends BaseFragment<P, Fragm
         };
         mScannerView.setResultHandler(mResultHandler);
         mViewBinding.contentFrame.addView(mScannerView);
+
+
+        mViewBinding.ivChange.setOnClickListener(view -> {
+            if (mCurCameraId == getDefaultCameraId()) {
+                mCurCameraId = getFrontFacingCameraId();
+                mScannerView.stopCamera();
+
+                mScannerView.startCamera(getFrontFacingCameraId());
+            } else {
+                mCurCameraId = getDefaultCameraId();
+                mScannerView.stopCamera();
+
+                mScannerView.startCamera(getDefaultCameraId());
+            }
+        });
     }
 
+    private int mCurCameraId;
+
+
     @Override
     public void onResume() {
         super.onResume();
-        mScannerView.startCamera();
+        mScannerView.startCamera(mCurCameraId);
+    }
+
+    private int getDefaultCameraId() {
+        return 0;
+    }
+
+    private int getFrontFacingCameraId() {
+        return 1;
     }
 
     @Override

app/src/main/java/com/xingdata/zzdpos/util/SystemUtil.java

@@ -57,8 +57,8 @@ public final class SystemUtil {
                 e.printStackTrace();
             }
         }
-//        return "0818562";
-        return "test8988";
+        return "0818562";
+//        return "test8988";
     }
 
     /**

app/src/main/res/layout/fragment_store_scan.xml

@@ -5,10 +5,10 @@
 
         <variable
             name="onClickListener"
-            type="com.xingdata.zzdpos.util.OnClickListener"></variable>
+            type="com.xingdata.zzdpos.util.OnClickListener" />
     </data>
 
-    <LinearLayout
+    <FrameLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="vertical">
@@ -20,12 +20,21 @@
             android:inflatedId="@+id/iv_VsContent"
             android:layout="@layout/title"
             android:onClick="@{onClickListener}"
-            android:visibility="gone"/>
+            android:visibility="gone" />
 
         <FrameLayout
             android:id="@+id/content_frame"
             android:layout_width="match_parent"
-            android:layout_height="match_parent"/>
-    </LinearLayout>
+            android:layout_height="match_parent" />
+
+        <ImageView
+            android:id="@+id/iv_change"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:contentDescription="切换前后"
+            android:padding="@dimen/all_margin"
+            android:src="@mipmap/icon_camera" />
+
+    </FrameLayout>
 
 </layout>
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