4
我在 http://developer.android.com/guide/topics/media/camera.html 使用說明書,但我有一個問題。此代碼保存圖像兩次。第一張照片保存在/ sdcard/DCIM/Camera中,第二張照片保存在/ sdcard/PicturesMyCameraApp中。我如何刪除第一次保存到/ sdcard/DCIM /相機。 感謝您的幫助Double save image
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;
}
問題是每兩張圖片都有不同的名稱時間戳。第一張圖片保存到/ sdcard/PicturesMyCameraApp和第二張/ sdcard/DCIM /相機並具有不同的名稱...例如,第一張圖片的名稱爲165337(格式爲hhmmss),第二張圖片的格式爲165343等等。 – 2011-12-19 15:56:39
@ user1106177我認爲那裏有一個基本問題。如果你想創建一個CUSTOM相機應用程序,這是啓動第三方相機應用程序的錯誤方法。而第三方應用最可能做的是將創建的圖片保存到/ DCIM /相機。如何創建一個'真正'的自定義相機,請看這裏:http://developer.android.com/reference/android/hardware/Camera.html因爲第三方應用程序正在保存圖片,你不能說它的名字是什麼,如你所說。你唯一能做的就是迭代/ DCIM/Camera中的所有圖像,找到最新時間戳的圖像,並刪除這個圖像。 – poitroae 2011-12-19 15:58:48