Lưu bitmap vào chức năng tập tin

Question

Tôi đang cố gắng lưu một bitmap vào tệp và một tệp cụ thể trực tiếp bằng cách sử dụng một hàm tôi đã tạo. Nó không hoạt động. Nó treo sau khi bitmap.compress một phần (trước đây ở đây3).

File dir = new File(filepath); 

    if(!dir.exists())dir.mkdirs(); 

    File file = new File(Environment.getExternalStorageDirectory() + filepath, side + ".png"); 
    FileOutputStream fOut = new FileOutputStream(file); 

    bitmap.compress(Bitmap.CompressFormat.PNG, 85, fOut); 
    fOut.flush(); 
    fOut.close(); 

    System.out.println(filepath); 

    bitmap.recycle(); 
    System.gc(); 

---

Lỗi đăng nhập:

06-29 00:16:38.089: D/AndroidRuntime(3260): Shutting down VM 
06-29 00:16:38.089: W/dalvikvm(3260): threadid=1: thread exiting with uncaught exception (group=0xb587f4f0) 
06-29 00:16:38.089: E/AndroidRuntime(3260): FATAL EXCEPTION: main 
06-29 00:16:38.089: E/AndroidRuntime(3260): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=Intent { act=android.intent.action.VIEW dat=content://org.openintents.filemanager/mimetype//mnt/sdcard/download/02977_awreckedboatintheocean_1280x1024.jpg }} to activity {com.polygonattraction.testbirds/com.polygonattraction.testbirds.functions.SelectImageSource}: java.lang.IllegalStateException: Can't compress a recycled bitmap 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.app.ActivityThread.deliverResults(ActivityThread.java:2532) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.app.ActivityThread.handleSendResult(ActivityThread.java:2574) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.app.ActivityThread.access$2000(ActivityThread.java:117) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:961) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.os.Handler.dispatchMessage(Handler.java:99) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.os.Looper.loop(Looper.java:130) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.app.ActivityThread.main(ActivityThread.java:3683) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at java.lang.reflect.Method.invoke(Method.java:507) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at dalvik.system.NativeStart.main(Native Method) 
06-29 00:16:38.089: E/AndroidRuntime(3260): Caused by: java.lang.IllegalStateException: Can't compress a recycled bitmap 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.graphics.Bitmap.checkRecycled(Bitmap.java:180) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.graphics.Bitmap.compress(Bitmap.java:581) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at com.polygonattraction.testbirds.functions.Functions.SaveToFile(Functions.java:144) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at com.polygonattraction.testbirds.functions.SelectImageSource.onActivityResult(SelectImageSource.java:113) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.app.Activity.dispatchActivityResult(Activity.java:3908) 
06-29 00:16:38.089: E/AndroidRuntime(3260):  at android.app.ActivityThread.deliverResults(ActivityThread.java:2528) 

Answer 1

1. Bạn cần có sự cho phép thích hợp trong manifest.xml:

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

2. out.flush() kiểm tra các out không phải là nu ll ..

3. String file_path = Environment.getExternalStorageDirectory().getAbsolutePath() + 
             "/PhysicsSketchpad"; 
   File dir = new File(file_path); 
   if(!dir.exists()) 
       dir.mkdirs(); 
   File file = new File(dir, "sketchpad" + pad.t_id + ".png"); 
   FileOutputStream fOut = new FileOutputStream(file); 
   
   bmp.compress(Bitmap.CompressFormat.PNG, 85, fOut); 
   fOut.flush(); 
   fOut.close(); 
   

Answer 2

Tôi nghĩ rằng đây là câu trả lời tốt hơn nhiều.

hai ví dụ phù hợp với tôi, để bạn tham khảo.

Bitmap bitmap = Utils.decodeBase64(base64); 
    try{ 
     File file = new File(filePath); 
     FileOutputStream fOut = new FileOutputStream(file); 
     bitmap.compress(Bitmap.CompressFormat.PNG, 85, fOut); 
     fOut.flush(); 
     fOut.close();} 
    catch (Exception e) { 
     e.printStackTrace(); 
     LOG.i(null, "Save file error!"); 
     return false; 
} 

và điều này

Bitmap savePic = Utils.decodeBase64(base64); 
    File file = new File(filePath); 
    File path = new File(file.getParent()); 

    if (savePic != null) { 
     try { 
      // build directory 
      if (file.getParent() != null && !path.isDirectory()) { 
       path.mkdirs(); 
      } 
      // output image to file 
      FileOutputStream fos = new FileOutputStream(filePath); 
      savePic.compress(Bitmap.CompressFormat.PNG, 90, fos); 
      fos.close(); 
      ret = true; 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 

    } else { 
     LOG.i(TAG, "savePicture image parsing error"); 
    } 

Tôi nghĩ rằng đây là câu trả lời tốt hơn nhiều.

Answer 3

Đây là chức năng giúp bạn

private void saveBitmap(Bitmap bitmap,String path){ 
     if(bitmap!=null){ 
      try { 
       FileOutputStream outputStream = null; 
       try { 
        outputStream = new FileOutputStream(path); //here is set your file path where you want to save or also here you can set file object directly 

        bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream); // bitmap is your Bitmap instance, if you want to compress it you can compress reduce percentage 
        // PNG is a lossless format, the compression factor (100) is ignored 
       } catch (Exception e) { 
        e.printStackTrace(); 
       } finally { 
        try { 
         if (outputStream != null) { 
          outputStream.close(); 
         } 
        } catch (IOException e) { 
         e.printStackTrace(); 
        } 
       } 
      } catch (Exception e) { 
       e.printStackTrace(); 
      }  
     } 
    }