我的代码中有点问题，请帮助我克服这个问题 我有一个捕捉图像和活动的活动保存在app fin文件夹中。点击保存按钮，它将图像保存在文件夹中，但当用户使用相机活动时，则会在文件夹中创建0kb文件，如何避免这种情况
这是我的相机活动相关代码
public class camera extends Activity {
private static final int ACTION_TAKE_PHOTO_B = 1;
private static final String BITMAP_STORAGE_KEY = "viewbitmap";
private static final String IMAGEVIEW_VISIBILITY_STORAGE_KEY = "imageviewvisibility";
private ImageView mImageView;
private Bitmap mImageBitmap;
private String mCurrentPhotoPath;
private static final String JPEG_FILE_PREFIX = "IMG_";
private static final String JPEG_FILE_SUFFIX = ".jpg";
private File getAlbumDir() {
String path = Environment.getExternalStorageDirectory().toString();
File filenamedemo = new File(path + "/ImageFolder/");
String name = String.valueOf(filenamedemo);
if (Environment.MEDIA_MOUNTED.equals(Environment
.getExternalStorageState())) {
if (name != null) {
if (!filenamedemo.mkdirs()) {
if (!filenamedemo.exists()) {
return null;
}
}
}
} else {
}
return filenamedemo;
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
.format(new Date(0));
String imageFileName = JPEG_FILE_PREFIX + timeStamp + "_";
File albumF = getAlbumDir();
File imageF = File.createTempFile(imageFileName, JPEG_FILE_SUFFIX,
albumF);
return imageF;
}
private File setUpPhotoFile() throws IOException {
File f = createImageFile();
mCurrentPhotoPath = f.getAbsolutePath();
return f;
}
private void galleryAddPic() {
Intent mediaScanIntent = new Intent(
"android.intent.action.MEDIA_SCANNER_SCAN_FILE");
File f = new File(mCurrentPhotoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = null;
try {
f = setUpPhotoFile();
mCurrentPhotoPath = f.getAbsolutePath();
takePictureIntent
.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
} catch (IOException e) {
e.printStackTrace();
f = null;
mCurrentPhotoPath = null;
}
startActivityForResult(takePictureIntent, ACTION_TAKE_PHOTO_B);
}
private boolean isDeviceSupportCamera() {
if (getApplicationContext().getPackageManager().hasSystemFeature(
PackageManager.FEATURE_CAMERA)) {
// this device has a camera
return true;
} else {
// no camera on this device
return false;
}
}
private void handleBigCameraPhoto() {
if (mCurrentPhotoPath != null) {
// setPic();
// galleryAddPic();
mCurrentPhotoPath = null;
Intent viewint = new Intent(camera.this, TashPatti.class);
startActivity(viewint);
finish();
}
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
dispatchTakePictureIntent();
/*
* if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) {
* mAlbumStorageDirFactory = new FroyoAlbumDirFactory(); } else {
* mAlbumStorageDirFactory = new BaseAlbumDirFactory(); }
*/
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == ACTION_TAKE_PHOTO_B) {
if (resultCode == RESULT_OK) {
Toast.makeText(this, "picture saved.", Toast.LENGTH_LONG)
.show();
handleBigCameraPhoto();
} else if (resultCode == RESULT_CANCELED) {
// User cancelled the video capture
Toast.makeText(this, "User cancelled the image capturing.",
Toast.LENGTH_LONG).show();
} else {
// Video capture failed, advise user
Toast.makeText(this, "image capture failed.", Toast.LENGTH_LONG)
.show();
}
}
}
// Some lifecycle callbacks so that the image can survive orientation change
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putParcelable(BITMAP_STORAGE_KEY, mImageBitmap);
outState.putBoolean(IMAGEVIEW_VISIBILITY_STORAGE_KEY,
(mImageBitmap != null));
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
mImageBitmap = savedInstanceState.getParcelable(BITMAP_STORAGE_KEY);
mImageView.setImageBitmap(mImageBitmap);
mImageView
.setVisibility(savedInstanceState
.getBoolean(IMAGEVIEW_VISIBILITY_STORAGE_KEY) ? ImageView.VISIBLE
: ImageView.INVISIBLE);
}
}
任何帮助都会受到赞赏， 谢谢你:)）
答案 0 :(得分：1)
我通过删除onActivitiResult（）中的0大小文件解决了我的问题， 我得到了我想要的但是我不清楚为什么我的代码在cancle操作后创建0大小的文件？
尊重他人，享受编码
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == ACTION_TAKE_PHOTO_B) {
if (resultCode == RESULT_OK) {
Toast.makeText(this, "picture saved.",
Toast.LENGTH_LONG).show();
Bitmap photo = (Bitmap) data.getExtras().get("data");
byte[] byteData = null;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG, 100, baos);
byteData = baos.toByteArray();
//handleBigCameraPhoto();
} else if (resultCode == RESULT_CANCELED) {
// User cancelled the video capture
Toast.makeText(this, "User cancelled the image capturing.",
Toast.LENGTH_LONG).show();
} else {
// Video capture failed, advise user
Toast.makeText(this, "image capture failed.",
Toast.LENGTH_LONG).show();
}
//this code delete the file if itz size is 0, 0 size occers wheen user cancles the
//camera activity so to avoid 0 size file in our folder we are deleting it
File file= filePath;
Log.i("lengthhh", Long.toString(file.length()));
if(file.exists() && file.length()==0)
{
file.delete();
}
Intent viewint=new Intent(camera.this, TashPatti.class);
startActivity(viewint); finish();
}
}