從片段中的攝像機意圖返回後，屏幕變爲白色

Question

我正在運行一個奇怪的情況。請幫助我。

我正在開發一個應用程序，用戶必須從攝像頭捕捉兩個圖像來註冊，即用戶照片和地址照片。

當我嘗試從背面攝像頭捕獲圖像。我可以成功地做到這一點。但是當我使用的前置攝像頭拍攝第二張圖像後，移動設備屏幕變爲白色。

注：註冊表格在片段中。

我已經搜索過它，但找不到任何解決方案。幫助我解決它。

源代碼：

private void captureImage(int ImageCode) { 

    Context context = getActivity(); 
    PackageManager packageManager = context.getPackageManager(); 
    if (packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA) == false 
      && packageManager 
        .hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY) == false) { 
     Toast.makeText(getActivity(), R.string.camera_is_not_available, 
       Toast.LENGTH_SHORT).show(); 
     return; 
    } 

    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
    // Ensure that there's a camera activity to handle the intent 
    if (takePictureIntent 
      .resolveActivity(getActivity().getPackageManager()) != null) { 
     // Create the File where the photo should go 
     File photoFile = null; 
     try { 
      photoFile = createImageFile(); 
     } catch (IOException ex) { 
      // Error occurred while creating the File 
      Toast.makeText(getActivity(), R.string.error_connecting_camera, 
        Toast.LENGTH_SHORT).show(); 
      ex.printStackTrace(); 
     } 
     // Continue only if the File was successfully created 
     if (photoFile != null) { 

      if (ImageCode == CAPTURE_MEMBER_PHOTO_REQUEST_CODE) { 
       takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, 
         Uri.fromFile(photoFile)); 
       startActivityForResult(takePictureIntent, 
         CAPTURE_MEMBER_PHOTO_REQUEST_CODE); 

       img_reg_member_photo.setImageBitmap(null); 
       mMemberPhotoPath = null; 
       memberImageflag = false; 
      } 
      if (ImageCode == CAPTURE_ADDRESS_PHOTO_REQUEST_CODE) { 
       takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, 
         Uri.fromFile(photoFile)); 
       startActivityForResult(takePictureIntent, 
         CAPTURE_ADDRESS_PHOTO_REQUEST_CODE); 

       img_reg_address_proof.setImageBitmap(null); 
       mAddressPhotoPath = null; 
       addressImageflag = false; 
      } 
     } 
    } 
} 

@SuppressLint("SimpleDateFormat") 
private File createImageFile() throws IOException { 
    // Create an image file name 
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss") 
      .format(new Date()); 
    String imageFileName = "JPEG_" + timeStamp + "_"; 
    File storageDir = Environment 
      .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES); 
    File image = File.createTempFile(imageFileName, ".jpg", storageDir); 

    mPhotoPath = image.getAbsolutePath(); 

    Log.v("createImageFile", "" + mPhotoPath); 
    return image; 
} 

public void onActivityResult(int requestCode, int resultCode, Intent data) { 

    if (requestCode == CAPTURE_MEMBER_PHOTO_REQUEST_CODE 
      && resultCode == Activity.RESULT_OK) { 

     File imgFile = new File(mPhotoPath); 
     if (imgFile.exists()) { 

      mMemberPhotoPath = mPhotoPath; 
      BitmapFactory.Options bitmap_options = new BitmapFactory.Options(); 
      bitmap_options.inSampleSize = 4; 
      bitmap_options.outHeight = 200; 
      bitmap_options.outWidth = 200; 

      Bitmap myBitmap = BitmapFactory.decodeFile(
        imgFile.getAbsolutePath(), bitmap_options); 
      img_reg_member_photo.setImageBitmap(myBitmap); 

      if (img_reg_member_photo.getDrawable() == null) { 
       Log.e("MEMBER IMAGE VIEW", "NULL MEMBER IMAGE"); 
       memberImageflag = false; 
      } else { 
       Log.e("MEMBER IMAGE VIEW", "MEMBER IMAGE VIEW UPDATED"); 
       memberImageflag = true; 
      } 
     } 
    } else if (requestCode == CAPTURE_MEMBER_PHOTO_REQUEST_CODE 
      && resultCode == Activity.RESULT_CANCELED) { 

     Toast.makeText(getActivity(), R.string.camera_operation_canceled, 
       Toast.LENGTH_SHORT).show(); 

     memberImageflag = false; 
     img_reg_member_photo.setImageBitmap(null); 

     Log.e("MEMBER IMAGE VIEW", "CANCEL EVENT - NULL MEMBER IMAGE" 
       + img_reg_member_photo.getDrawable()); 

    } 

    if (requestCode == CAPTURE_ADDRESS_PHOTO_REQUEST_CODE 
      && resultCode == Activity.RESULT_OK) { 

     File imgFile = new File(mPhotoPath); 
     if (imgFile.exists()) { 

      mAddressPhotoPath = mPhotoPath; 
      BitmapFactory.Options bitmap_options = new BitmapFactory.Options(); 
      bitmap_options.inSampleSize = 4; 
      bitmap_options.outHeight = 200; 
      bitmap_options.outWidth = 200; 

      Bitmap myBitmap = BitmapFactory.decodeFile(
        imgFile.getAbsolutePath(), bitmap_options); 

      img_reg_address_proof.setImageBitmap(myBitmap); 

      if (img_reg_address_proof.getDrawable() == null) { 
       Log.e("ADDRESS IMAGE VIEW", "NULL ADDRESS IMAGE"); 
       addressImageflag = false; 
      } else { 
       Log.e("ADDRESS IMAGE VIEW", "ADDRESS IMAGE VIEW UPDATED"); 
       addressImageflag = true; 
      } 
     } 
    } else if (requestCode == CAPTURE_ADDRESS_PHOTO_REQUEST_CODE 
      && resultCode == Activity.RESULT_CANCELED) { 

     Toast.makeText(getActivity(), R.string.camera_operation_canceled, 
       Toast.LENGTH_SHORT).show(); 

     addressImageflag = false; 
     img_reg_address_proof.setImageBitmap(null); 

     Log.e("ADDRESS IMAGE VIEW", "CANCEL EVENT - NULL ADDRESS IMAGE" 
       + img_reg_address_proof.getDrawable()); 

    } 
} 

XML：

<?xml version="1.0" encoding="utf-8"?> 
<com.equesttech.mybyk.slidingfragments.FractionalLinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 

    <TextView 
     android:id="@+id/txt_label_navigate" 
     style="?android:attr/listSeparatorTextViewStyle" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="top" 
     android:background="@drawable/box_green" 
     android:gravity="center" 
     android:paddingBottom="15dp" 
     android:paddingLeft="10dp" 
     android:paddingRight="10dp" 
     android:paddingTop="15dp" 
     android:text="@string/tap_to_close" 
     android:textAppearance="?android:attr/textAppearanceMedium" 
     android:textColor="@color/black" 
     android:textStyle="bold" /> 

    <ScrollView 
     android:id="@+id/scrollView1" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" > 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical" 
      android:animateLayoutChanges="true" 
      android:padding="10dp" > 

      <TextView 
       android:id="@+id/txt_label_user_registration" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginBottom="5dp" 
       android:gravity="center" 
       android:padding="10dp" 
       android:text="@string/register_member" 
       android:textAppearance="?android:attr/textAppearanceMedium" 
       android:textColor="@color/actionbar" 
       android:textStyle="bold" /> 

      <TextView 
       android:id="@+id/txt_member_acc_details" 
       style="?android:attr/listSeparatorTextViewStyle" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginBottom="5dp" 
       android:padding="5dp" 
       android:text="@string/member_acc_details" 
       android:textStyle="bold" /> 

      <EditText 
       android:id="@+id/edt_reg_firstname" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginBottom="5dp" 
       android:layout_marginTop="5dp" 
       android:background="@drawable/box_edittext" 
       android:ems="10" 
       android:hint="@string/first_name" 
       android:padding="10dp" > 
      </EditText> 

      <EditText 
       android:id="@+id/edt_reg_lastname" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginBottom="5dp" 
       android:layout_marginTop="5dp" 
       android:background="@drawable/box_edittext" 
       android:ems="10" 
       android:hint="@string/last_name" 
       android:padding="10dp" > 
      </EditText> 

      <TextView 
       android:id="@+id/txt_gender" 
       style="?android:attr/listSeparatorTextViewStyle" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginBottom="5dp" 
       android:layout_marginTop="5dp" 
       android:padding="5dp" 
       android:text="@string/gender" 
       android:textAppearance="?android:attr/textAppearanceSmall" 
       android:textStyle="bold" /> 

      <RadioGroup 
       android:id="@+id/radio_grp_gender" 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:orientation="horizontal" > 

       <RadioButton 
        android:id="@+id/radio_male" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="@string/male" /> 

       <RadioButton 
        android:id="@+id/radio_female" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:text="@string/female" /> 
      </RadioGroup> 

      <LinearLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginBottom="5dp" 
       android:layout_marginTop="5dp" 
       android:gravity="center" 
       android:orientation="horizontal" > 

       <RelativeLayout 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="1" 
        android:gravity="center_vertical" 
        android:visibility="visible" > 

        <EditText 
         android:id="@+id/edt_reg_dob" 
         android:layout_width="match_parent" 
         android:layout_height="wrap_content" 
         android:background="@drawable/box_edittext" 
         android:clickable="false" 
         android:ems="10" 
         android:focusable="false" 
         android:focusableInTouchMode="false" 
         android:hint="@string/dob" 
         android:inputType="datetime" 
         android:padding="12dp" 
         android:textColor="@color/black" /> 

        <Button 
         android:id="@+id/btn_delete_reg_dob" 
         android:layout_width="32dp" 
         android:layout_height="32dp" 
         android:layout_alignBaseline="@+id/edt_reg_dob" 
         android:layout_alignParentEnd="true" 
         android:layout_alignParentRight="true" 
         android:layout_marginLeft="5dp" 
         android:layout_marginRight="5dp" 
         android:background="@drawable/delete_item" 
         android:gravity="center_vertical" 
         android:visibility="gone" /> 
       </RelativeLayout> 

       <Button 
        android:id="@+id/btn_reg_dob" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_margin="5dp" 
        android:background="@drawable/box_cyan" 
        android:padding="10dp" 
        android:text="@string/date" 
        android:textColor="@color/white" /> 
      </LinearLayout> 

      <EditText 
       android:id="@+id/edt_reg_contactnumber" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginBottom="5dp" 
       android:layout_marginTop="5dp" 
       android:background="@drawable/box_edittext" 
       android:ems="10" 
       android:hint="@string/contact_number" 
       android:inputType="number" 
       android:maxLength="10" 
       android:padding="10dp" > 
      </EditText> 

      <TextView 
       android:id="@+id/txt_member_documents" 
       style="?android:attr/listSeparatorTextViewStyle" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginBottom="5dp" 
       android:layout_marginTop="5dp" 
       android:padding="5dp" 
       android:text="@string/member_documents" 
       android:textStyle="bold" /> 

      <LinearLayout 
       android:id="@+id/view_current_photo" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginTop="5dp" 
       android:gravity="center" 
       android:orientation="vertical" 
       android:visibility="visible" > 

       <TextView 
        android:id="@+id/txt_current_photo" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_marginBottom="5dp" 
        android:layout_marginTop="5dp" 
        android:padding="5dp" 
        android:text="@string/current_photo" 
        android:textAppearance="?android:attr/textAppearanceSmall" 
        android:textStyle="bold" /> 

       <Button 
        android:id="@+id/btn_select_member_photo" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:background="@drawable/box_red" 
        android:padding="10dp" 
        android:text="@string/capture_image" 
        android:textColor="@color/white" /> 

       <ImageView 
        android:id="@+id/img_reg_member_photo" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_marginTop="10dp" 
        android:contentDescription="@string/address_proof" 
        android:scaleType="centerCrop" /> 
      </LinearLayout> 

      <LinearLayout 
       android:id="@+id/view_driving_license" 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginTop="5dp" 
       android:gravity="center" 
       android:orientation="vertical" 
       android:visibility="visible" > 

       <TextView 
        android:id="@+id/txt_driving_license" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:layout_marginBottom="5dp" 
        android:layout_marginTop="5dp" 
        android:padding="5dp" 
        android:text="@string/address_proof" 
        android:textAppearance="?android:attr/textAppearanceSmall" 
        android:textStyle="bold" /> 

       <Button 
        android:id="@+id/btn_select_driving_license" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:background="@drawable/box_red" 
        android:padding="10dp" 
        android:text="@string/capture_image" 
        android:textColor="@color/white" /> 

       <ImageView 
        android:id="@+id/img_reg_address_proof" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_marginTop="10dp" 
        android:contentDescription="@string/address_proof" 
        android:scaleType="centerCrop" /> 
      </LinearLayout> 

      <LinearLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" 
       android:layout_marginTop="10dp" 
       android:gravity="center" 
       android:orientation="horizontal" 
       android:padding="5dp" > 

       <Button 
        android:id="@+id/btn_submit" 
        style="?android:attr/buttonBarButtonStyle" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_margin="5dp" 
        android:background="@drawable/box_green" 
        android:padding="10dp" 
        android:text="@string/submit" 
        android:textColor="@color/white" /> 

       <Button 
        android:id="@+id/btn_clear" 
        style="?android:attr/buttonBarButtonStyle" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_margin="5dp" 
        android:background="@drawable/box_cyan" 
        android:padding="10dp" 
        android:text="@string/clear" 
        android:textColor="@color/white" /> 
      </LinearLayout> 
     </LinearLayout> 
    </ScrollView> 

</com.equesttech.mybyk.slidingfragments.FractionalLinearLayout> 

Answer 1

這是我的應用程序的一個工作代碼，它從正面和背面拍攝圖像凸輪，並在片段內使用。我有額外的圖像裁剪功能請避免使用時，如果不必要

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

       if(taken_image==null) { 

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
        Uri fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image 
        image_uri = fileUri; 
        intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name 
        startActivityForResult(intent, 1); 

        dialog.cancel(); 
        mEdit.setVisibility(View.VISIBLE); 
       } 

      } 
     }); 


@Override 
    public void onActivityResult(int requestCode, int resultCode, final Intent data) { 

     super.onActivityResult(requestCode, resultCode, data); 

     if (resultCode == Activity.RESULT_OK&&requestCode==1) { 

      if(image_uri!=null) 
       try { 
        capture=true; 

        performCrop(image_uri); 

       } catch (OutOfMemoryError e) { 
        Toast.makeText(getActivity(), e + "\"memory exception occured\"", Toast.LENGTH_LONG).show(); 

        taken_image = null; 
        round_Image = null; 
        upload_image_hd = null; 

       } catch (Exception e) { 
        Toast.makeText(getActivity(), e + "\"exception occured\"", Toast.LENGTH_SHORT).show(); 
        taken_image = null; 
        round_Image = null; 
        upload_image_hd = null; 

       } 


     } 
else if (requestCode == 3) { //after cropping of profilepic 
      // get the returned data 
      try { 
      Bundle extras = data.getExtras(); 
      // get the cropped bitmap 
      Bitmap thePic = extras.getParcelable("data"); 
      } 
      catch(Exception e){ 
       System.out.println(e); 
      } 


      if(capture){ 

      ExifInterface exif = null; 
      try { 
       exif = new ExifInterface(image_uri.getPath()); 
       //Since API Level 5 
      int orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL); 
      //TODO 
      upload_image_hd =BitmapFactory.decodeFile(image_uri.getPath()); 
      switch (orientation) { 
      case ExifInterface.ORIENTATION_ROTATE_90: 
       Rotate90Bitmap(thePic,upload_image_hd, 90); 
       break; 
      case ExifInterface.ORIENTATION_ROTATE_180: 
       Rotate180Bitmap(thePic,upload_image_hd, 180); 
       break; 
      case ExifInterface.ORIENTATION_ROTATE_270: 
       Rotate270Bitmap(thePic,upload_image_hd, 270); 
       break; 
      case ExifInterface.ORIENTATION_NORMAL: 
       RotateBitmap(thePic,upload_image_hd, 0); 
       break; 
      default: 
       RotateBitmap(thePic,upload_image_hd, 0); 
       break; 
     } 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      catch (OutOfMemoryError e) { 
       Toast.makeText(getActivity(), e + "\"memory exception occured\"", Toast.LENGTH_LONG).show(); 

       taken_image = null; 
       round_Image = null; 
       upload_image_hd = null; 

      } catch (Exception e) { 

       taken_image = null; 
       round_Image = null; 
       upload_image_hd = null; 

      } 
      } 

    } 



/** 
    * this function does the crop operation. 
    */ 
    private void performCrop(Uri picUri) { 
     // take care of exceptions 
     try { 
      // call the standard crop action intent (the user device may not 
      // support it) 
      Intent cropIntent = new Intent("com.android.camera.action.CROP");   
      // indicate image type and Uri 
      cropIntent.setDataAndType(picUri, "image/*"); 
      // set crop properties 
      cropIntent.putExtra("crop", "true"); 
      // indicate aspect of desired crop 
      cropIntent.putExtra("aspectX", 2); 
      cropIntent.putExtra("aspectY", 1); 
      // indicate output X and Y 
      cropIntent.putExtra("outputX", 256); 
      cropIntent.putExtra("outputY", 256); 
      // retrieve data on return 
      cropIntent.putExtra("return-data", true); 
      // start the activity - we handle returning in onActivityResult 
      startActivityForResult(cropIntent, 3); 
     } 
     // respond to users whose devices do not support the crop action 
     catch (ActivityNotFoundException anfe) { 
      Toast toast = Toast 
        .makeText(getActivity(), "This device doesn't support the crop action!", Toast.LENGTH_SHORT); 
      toast.show(); 
     } 
     } 



/* 
/
public Bitmap RotateBitmap(Bitmap crop,Bitmap source, float angle) { 
     Matrix matrix = new Matrix(); 
     matrix.postRotate(angle); 

     round_Image = Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); 
     // get the base 64 string 
     imgString = Base64.encodeToString(getBytesFromBitmap(round_Image),Base64.NO_WRAP); 
     Bitmap cropimg=Bitmap.createBitmap(crop, 0, 0, crop.getWidth(), crop.getHeight(), matrix, true); 
     imgcroppedString=Base64.encodeToString(getBytesFromBitmap(cropimg),Base64.NO_WRAP); 
     uploadProfilePicture_bytes(); 
     return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); 
    } 

    public Bitmap Rotate90Bitmap(Bitmap crop,Bitmap source, float angle) { 
     Matrix matrix = new Matrix(); 
     matrix.postRotate(angle); 

     round_Image = Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); 
     Bitmap cropimg=Bitmap.createBitmap(crop, 0, 0, crop.getWidth(), crop.getHeight(), matrix, true); 
     imgcroppedString=Base64.encodeToString(getBytesFromBitmap(cropimg),Base64.NO_WRAP); 
     // get the base 64 string 
     imgString = Base64.encodeToString(getBytesFromBitmap(round_Image),Base64.NO_WRAP); 
     uploadProfilePicture_bytes(); 
     return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); 
    } 

    public Bitmap Rotate180Bitmap(Bitmap crop,Bitmap source, float angle) { 
     Matrix matrix = new Matrix(); 
     matrix.postRotate(angle); 

     round_Image = Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); 
     Bitmap cropimg=Bitmap.createBitmap(crop, 0, 0, crop.getWidth(), crop.getHeight(), matrix, true); 
     imgcroppedString= Base64.encodeToString(getBytesFromBitmap(cropimg),Base64.NO_WRAP); 
     // get the base 64 string 
     imgString = Base64.encodeToString(getBytesFromBitmap(round_Image),Base64.NO_WRAP); 

     uploadProfilePicture_bytes(); 
     return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); 
    } 

    public Bitmap Rotate270Bitmap(Bitmap crop,Bitmap source, float angle) { 
     Matrix matrix = new Matrix(); 
     matrix.postRotate(angle); 

     round_Image = Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); 
     // get the base 64 string 
     imgString = Base64.encodeToString(getBytesFromBitmap(round_Image),Base64.NO_WRAP); 

     Bitmap cropimg=Bitmap.createBitmap(crop, 0, 0, crop.getWidth(), crop.getHeight(), matrix, true); 
     imgcroppedString= Base64.encodeToString(getBytesFromBitmap(cropimg),Base64.NO_WRAP); 

     uploadProfilePicture_bytes(); 
     return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); 
    }