优化摄像头权限获取流程;

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

@@ -7,11 +7,15 @@ import android.view.View;
 import android.view.ViewStub;
 import android.widget.TextView;
 
+import com.blankj.utilcode.constant.PermissionConstants;
+import com.blankj.utilcode.util.PermissionUtils;
 import com.xingdata.zzdpos.R;
 import com.xingdata.zzdpos.base.BaseFragment;
 import com.xingdata.zzdpos.base.BasePresenter;
 import com.xingdata.zzdpos.databinding.FragmentStoreScanBinding;
 
+import java.util.List;
+
 import me.dm7.barcodescanner.core.IViewFinder;
 import me.dm7.barcodescanner.core.ViewFinderView;
 import me.dm7.barcodescanner.zxing.ZXingScannerView;
@@ -57,8 +61,26 @@ public class ScanFragment<P extends BasePresenter> extends BaseFragment<P, Fragm
         void onBackPressed();
     }
 
+    private boolean isDenied = false;
+
     @Override
     public void initView() {
+        isDenied = false;
+        PermissionUtils.permission(PermissionConstants.CAMERA).callback(new PermissionUtils.FullCallback() {
+            @Override
+            public void onGranted(List<String> permissionsGranted) {
+                isDenied = false;
+                initCamera();
+            }
+
+            @Override
+            public void onDenied(List<String> permissionsDeniedForever, List<String> permissionsDenied) {
+                isDenied = true;
+            }
+        }).request();
+    }
+
+    private void initCamera() {
         mCameraManager = (CameraManager) mContext.getSystemService(Context.CAMERA_SERVICE);
 
         if (!titleStr.equals("")) {
@@ -105,13 +127,15 @@ public class ScanFragment<P extends BasePresenter> extends BaseFragment<P, Fragm
         });
     }
 
+
     private int mCurCameraId;
 
 
     @Override
     public void onResume() {
         super.onResume();
-        mScannerView.startCamera(mCurCameraId);
+        if (isDenied) pop();
+        if (mScannerView != null) mScannerView.startCamera(mCurCameraId);
     }
 
     private int getDefaultCameraId() {
@@ -125,7 +149,7 @@ public class ScanFragment<P extends BasePresenter> extends BaseFragment<P, Fragm
     @Override
     public void onPause() {
         super.onPause();
-        mScannerView.stopCamera();
+        if (mScannerView != null) mScannerView.stopCamera();
     }
 
     /**