我一直试图获取捕获图像的路径以删除图像.在StackOverflow上找到了很多答案,但没有一个对我有用.我得到了以下答案:
private String getLastImagePath() {
final String[] imageColumns = { MediaStore.Images.Media._ID,
MediaStore.Images.Media.DATA };
final String imageOrderBy = MediaStore.Images.Media._ID + " DESC";
Cursor imageCursor = POS.this.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, imageColumns,
null, null, imageOrderBy);
if (imageCursor.moveToFirst()) {
// int id = imageCursor.getInt(imageCursor
// .getColumnIndex(MediaStore.Images.Media._ID));
String fullPath = imageCursor.getString(imageCursor
.getColumnIndex(MediaStore.Images.Media.DATA));
return fullPath;
} else {
return "";
}
}
此代码适用于Samsung选项卡,但在Lenovo选项卡和i-ball选项卡中不起作用.那么,任何人都可以帮我找到另一种解决方案吗?任何帮助将不胜感激.谢谢.
这是我的onActivityResult:
if (requestCode == CmsInter.CAMERA_REQUEST && resultCode == RESULT_OK) {
//Bitmap photo = null;
//photo = (Bitmap) data.getExtras().get("data");
String txt = "";
if (im != null) {
String result = "";
//im.setImageBitmap(photo);
im.setTag("2");
int index = im.getId();
String path = getLastImagePath();
try {
bitmap1 = BitmapFactory.decodeFile(path, options);
bitmap = Bitmap.createScaledBitmap(bitmap1, 512, 400, false);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
byte[] bytData = baos.toByteArray();
try {
baos.close();
} catch (IOException e) {
e.printStackTrace();
}
result = Base64.encode(bytData);
bytData = null;
} catch (OutOfMemoryError ooM) {
System.out.println("OutOfMemory Exception----->" + ooM);
bitmap1.recycle();
bitmap.recycle();
} finally {
bitmap1.recycle();
bitmap.recycle();
}
}
}
Aamirkhan.. 94
试试这样吧
通过相机意图,如下所示
Intent intent = new Intent(this); startActivityForResult(intent, REQ_CAMERA_IMAGE);
捕获图像后写OnActivityResult
如下
protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) { Bitmap photo = (Bitmap) data.getExtras().get("data"); imageView.setImageBitmap(photo); knop.setVisibility(Button.VISIBLE); // CALL THIS METHOD TO GET THE URI FROM THE BITMAP Uri tempUri = getImageUri(getApplicationContext(), photo); // CALL THIS METHOD TO GET THE ACTUAL PATH File finalFile = new File(getRealPathFromURI(tempUri)); System.out.println(mImageCaptureUri); } } public Uri getImageUri(Context inContext, Bitmap inImage) { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes); String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null); return Uri.parse(path); } public String getRealPathFromURI(Uri uri) { String path = ""; if (getContentResolver() != null) { Cursor cursor = getContentResolver().query(uri, null, null, null, null); if (cursor != null) { cursor.moveToFirst(); int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); path = cursor.getString(idx); cursor.close(); } } return path; }
并检查日志
编辑:
很多人都在问如何不获取缩略图.您需要为方法添加此代码getImageUri
:
public Uri getImageUri(Context inContext, Bitmap inImage) { Bitmap OutImage = Bitmap.createScaledBitmap(inImage, 1000, 1000,true); String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), OutImage, "Title", null); return Uri.parse(path); }
另一种方法压缩文件.您可以通过更改数字来调整大小1000,1000
试试这样吧
通过相机意图,如下所示
Intent intent = new Intent(this); startActivityForResult(intent, REQ_CAMERA_IMAGE);
捕获图像后写OnActivityResult
如下
protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) { Bitmap photo = (Bitmap) data.getExtras().get("data"); imageView.setImageBitmap(photo); knop.setVisibility(Button.VISIBLE); // CALL THIS METHOD TO GET THE URI FROM THE BITMAP Uri tempUri = getImageUri(getApplicationContext(), photo); // CALL THIS METHOD TO GET THE ACTUAL PATH File finalFile = new File(getRealPathFromURI(tempUri)); System.out.println(mImageCaptureUri); } } public Uri getImageUri(Context inContext, Bitmap inImage) { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes); String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null); return Uri.parse(path); } public String getRealPathFromURI(Uri uri) { String path = ""; if (getContentResolver() != null) { Cursor cursor = getContentResolver().query(uri, null, null, null, null); if (cursor != null) { cursor.moveToFirst(); int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA); path = cursor.getString(idx); cursor.close(); } } return path; }
并检查日志
编辑:
很多人都在问如何不获取缩略图.您需要为方法添加此代码getImageUri
:
public Uri getImageUri(Context inContext, Bitmap inImage) { Bitmap OutImage = Bitmap.createScaledBitmap(inImage, 1000, 1000,true); String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), OutImage, "Title", null); return Uri.parse(path); }
另一种方法压缩文件.您可以通过更改数字来调整大小1000,1000
有一个创建文件的解决方案(在外部缓存目录或其他任何地方)并将此文件的uri作为输出额外的摄像机意图 - 这将定义拍摄照片将被存储的路径.
这是一个例子:
File file; Uri fileUri; final int RC_TAKE_PHOTO = 1; private void takePhoto() { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); file = new File(getActivity().getExternalCacheDir(), String.valueOf(System.currentTimeMillis()) + ".jpg"); fileUri = Uri.fromFile(file); intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); getActivity().startActivityForResult(intent, RC_TAKE_PHOTO); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == RC_TAKE_PHOTO && resultCode == RESULT_OK) { //do whatever you need with taken photo using file or fileUri } } }
然后,如果您不再需要该文件,则可以使用该文件将其删除 file.delete();
顺便说一句,当用户从应用程序设置中清除应用程序的缓存时,将删除缓存目录中的文件.