Android将图像保存在SD卡中

Question

我正在将图像保存到SD卡中，但我希望目录文件夹将自动显示在图库和文件夹中的图像上。每当我保存图像时，我都会重新启动手机，以便在图库中显示目录文件夹。是我的代码有问题吗？或电话？请帮帮我。非常感谢。我不知道该怎么办

这里是我的代码：

String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", 
      Locale.getDefault()).format(new Date()); 
    mTempDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/" + "PixiePhotos" + "/"; 

    prepareDirectory(); 

     save.setOnClickListener(new View.OnClickListener() { 
      @SuppressLint("ShowToast") 
      @SuppressWarnings("deprecation") 
      public void onClick(View v) { 
       Log.v(TAG, "Save Tab Clicked"); 
       viewBitmap = Bitmap.createBitmap(500, 500, Bitmap.Config.ARGB_8888); 
       canvas = new Canvas(viewBitmap); 
       tapimageview.draw(canvas); 
       canvas.drawBitmap(bp, 0, 0, paint); 
       canvas.drawBitmap(drawingBitmap, matrix, paint); 
       canvas.drawBitmap(bmpstickers, matrix, paint); 
      //tapimageview.setImageBitmap(mBitmapDrawable.getBitmap()); 
       try { 
       mBitmapDrawable = new BitmapDrawable(viewBitmap); 

       mCurrent = "PXD_" + new SimpleDateFormat("yyyyMMdd_HHmmss", 
         Locale.getDefault()).format(new Date()) + ".jpg"; 
       bp1 = mBitmapDrawable.getBitmap(); 
       tapimageview.setImageBitmap(bp1); 
       mNewSaving = ((BitmapDrawable) mBitmapDrawable).getBitmap(); 
       String FtoSave = mTempDir + mCurrent; 
       File mFile = new File(FtoSave); 
       mFileOutputStream = new FileOutputStream(mFile); 
       mNewSaving.compress(CompressFormat.JPEG, 100, mFileOutputStream); 
       mFileOutputStream.flush(); 
       mFileOutputStream.close(); 
       } catch (FileNotFoundException e) { 
       Log.v(TAG, "FileNotFoundExceptionError " + e.toString()); 
       } catch (IOException e) { 
       Log.v(TAG, "IOExceptionError " + e.toString()); 
       } 
       Toast.makeText(getApplicationContext(), "Your photo has been saved", Toast.LENGTH_LONG).show(); 
      } 
      }); 
    } 


private boolean prepareDirectory() { 
     try { 
      if (makeDirectory()) { 
      return true; 
      } else { 
      return false; 
      } 
     } catch (Exception e) { 
      e.printStackTrace(); 
      //Toast.makeText(this, getString(R.string.sdcard_error), 1000).show(); 
      return false; 
     } 
     } 

    private boolean makeDirectory() { 
     File mTempFile = new File(mTempDir); 
     if (!mTempFile.exists()) { 
      mTempFile.mkdirs(); 
     } 

     if (mTempFile.isDirectory()) { 
      File[] mFiles = mTempFile.listFiles(); 
      for (File mEveryFile : mFiles) { 
      if (!mEveryFile.delete()) { 
       //System.out.println(getString(R.string.failed_to_delete) + mEveryFile); 
      } 
      } 
     } 
     return (mTempFile.isDirectory()); 
     } 

Answer 1

试试这个：

private boolean storeImage(Bitmap imageData, String filename) { 
    //get path to external storage (SD card) 
    String iconsStoragePath = Environment.getExternalStorageDirectory() + "/myAppDir/myImages/" 
    File sdIconStorageDir = new File(iconsStoragePath); 

    //create storage directories, if they don't exist 
    sdIconStorageDir.mkdirs(); 

    try { 
     String filePath = sdIconStorageDir.toString() + filename; 
     FileOutputStream fileOutputStream = new FileOutputStream(filePath); 

     BufferedOutputStream bos = new BufferedOutputStream(fileOutputStream); 

     //choose another format if PNG doesn't suit you 
     imageData.compress(CompressFormat.PNG, 100, bos); 

     bos.flush(); 
     bos.close(); 

    } catch (FileNotFoundException e) { 
     Log.w("TAG", "Error saving image file: " + e.getMessage()); 
     return false; 
    } catch (IOException e) { 
     Log.w("TAG", "Error saving image file: " + e.getMessage()); 
     return false; 
    } 

    return true; 
} 

不要忘了添加存储权限

由于这是操作的是将数据保存在外部存储器上，它需要AndroidManifest.xml权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 

Answer 2

尝试一下

void saveImage() { 

String root = Environment.getExternalStorageDirectory().toString(); 
File myDir = new File(root + "/saved_images"); 

String fname = "Image.jpg"; 
File file = new File (myDir, fname); 
if (file.exists()) file.delete(); 
try { 
     FileOutputStream out = new FileOutputStream(file); 
     myBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out); 
     out.flush(); 
     out.close(); 

} catch (Exception e) { 
     e.printStackTrace(); 
} 
} 

，并在您maniefest文件

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 

Answer 3

的问题是不是与代码添加权限......

什么这里发生过的
在SD卡上下载文件后，画廊不会通知添加或下载到系统的新文件
你需要做的是，你必须手动通知...... okhay库文件添加请出示画廊.. :)

对于您必须使用MediaScannerConnection

下载的文件，扫描该特定的文件，它会显示在画廊
，你就完成了:)