Double save image

Question

我在 http://developer.android.com/guide/topics/media/camera.html 使用说明书，但我有一个问题。此代码保存图像两次。第一张照片保存在/ sdcard/DCIM/Camera中，第二张照片保存在/ sdcard/PicturesMyCameraApp中。我如何删除第一次保存到/ sdcard/DCIM /相机。 感谢您的帮助

public void onClick(View v) { 
    // TODO Auto-generated method stub 
    switch (v.getId()) { 
     case R.id.imageButton1: 
      Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
      i.putExtra(MediaStore.EXTRA_OUTPUT, getOutputMediaFileUri()); 
      startActivityForResult(i, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE); 
     break; 
    } 
} 
@Override 
public boolean onCreateOptionsMenu(Menu menu){ 
    MenuInflater inflater = getMenuInflater(); 
    inflater.inflate(R.menu.mainmenu, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item){ 
    switch (item.getItemId()) { 
     case R.id.item1: 
      /*Intent intent = new Intent(ZodiacActivity.this, AboutActivity.class); 
      startActivity(intent);*/ 
     break; 
     case R.id.item2: 
      this.moveTaskToBack(true); 
     break; 
    } 
    return true; 
} 

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 

    if (requestCode==CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) { 
     if (resultCode==RESULT_OK) { 
      Toast.makeText(this, "Uloženo do: " + getOutputMediaFileUri().toString(), Toast.LENGTH_LONG).show(); 
     } 
     else { 
      return; 
     } 
    } 
} 

public Uri getOutputMediaFileUri(){ 
     return Uri.fromFile(getOutputMediaFile()); 
} 

public File getOutputMediaFile(){ 
    // To be safe, you should check that the SDCard is mounted 
    // using Environment.getExternalStorageState() before doing this. 

    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyCameraApp"); 
    // This location works best if you want the created images to be shared 
    // between applications and persist after your app has been uninstalled. 

    // Create the storage directory if it does not exist 
    if (! mediaStorageDir.exists()){ 
     if (! mediaStorageDir.mkdirs()){ 
      Log.d("MyCameraApp", "failed to create directory"); 
      return null; 
     } 
    } 

    // Create a media file name 
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
    File mediaFile; 
    mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg"); 

    return mediaFile; 
} 

Answer 1

你可以简单地删除该文件：

String pathToFile = "/sdcard/DCIM/Camera/imagename.jpg"; 
boolean success = new File(pathToFile).delete(); 

if(success){ 
// deleting file succeeded 
}else{ 
// it didn't succeed 
} 

编辑

获取/ SD卡/ DCIM /相机最新拍摄的照片：

File[] images = new File("/sdcard/DCIM/Camera").listFiles(); 
File latestSavedImage = images[0]; 
for(int i=1; i<images.length; ++i){ 
if(images[i].lastModified() > latestSavedImage.lastModified()){ 
    latestSavedImage = image; 
} 
} 

请注意，代码没有经过测试！