Java 在解析图像上检索文件
我已经设法将图像文件存储到parse中。我的问题在于找回它。从某种意义上说，在注册过程中，用户被要求上传一个配置文件图片，然后图像作为图像存储到parse中。我的问题在于检索它，除了提取可能匹配的名称、标题、年龄等信息外，我还希望能够检索图片 下面是代码，我在其中检索字符串信息，但我也希望在其中检索文件Java 在解析图像上检索文件,java,android,android-layout,android-activity,parse-platform,Java,Android,Android Layout,Android Activity,Parse Platform,我已经设法将图像文件存储到parse中。我的问题在于找回它。从某种意义上说，在注册过程中，用户被要求上传一个配置文件图片，然后图像作为图像存储到parse中。我的问题在于检索它，除了提取可能匹配的名称、标题、年龄等信息外，我还希望能够检索图片 下面是代码，我在其中检索字符串信息，但我也希望在其中检索文件 public class MatchingActivity extends Activity { private String currentUserId; private Arra
public class MatchingActivity extends Activity {
private String currentUserId;
private ArrayAdapter<String> namesArrayAdapter;
private ArrayList<String> names;
private ListView usersListView;
private Button logoutButton;
String userGender = ParseUser.getCurrentUser().getString("Gender");
String activityName = ParseUser.getCurrentUser().getString("ActivityName");
Number maxDistance = ParseUser.getCurrentUser().getNumber("Maximum_Distance");
String userLookingGender = ParseUser.getCurrentUser().getString("Looking_Gender");
Number minimumAge = ParseUser.getCurrentUser().getNumber("Minimum_Age");
Number maximumAge = ParseUser.getCurrentUser().getNumber("Maximum_Age");
Number userage = ParseUser.getCurrentUser().getNumber("Age");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.matching);
logoutButton = (Button) findViewById(R.id.logoutButton);
logoutButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
ParseUser.logOut();
Intent intent = new Intent(getApplicationContext(), LoginActivity.class);
startActivity(intent);
}
});
setConversationsList();
}
private void setConversationsList() {
currentUserId = ParseUser.getCurrentUser().getObjectId();
names = new ArrayList<String>();
// String userActivitySelectionName = null;
ParseQuery<ParseUser> query = ParseUser.getQuery();
// query.whereEqualTo("ActivityName",userActivitySelectionName);
query.whereNotEqualTo("objectId", ParseUser.getCurrentUser().getObjectId());
// users with Gender = currentUser.Looking_Gender
query.whereEqualTo("Gender", userLookingGender);
// users with Looking_Gender = currentUser.Gender
query.whereEqualTo("Looking_Gender", userGender);
query.setLimit(1);
query.whereEqualTo("ActivityName", activityName);
query.whereGreaterThanOrEqualTo("Minimum_Age", minimumAge).whereGreaterThanOrEqualTo("Age", userage);
query.whereLessThanOrEqualTo("Maximum_Age", maximumAge).whereLessThanOrEqualTo("Age", userage);
// query.whereWithinKilometers("Maximum_Distance", point, maxDistance)
query.findInBackground(new FindCallback<ParseUser>() {
public void done(List<ParseUser> userList, ParseException e) {
if (e == null) {
for (int i=0; i<userList.size(); i++) {
names.add(userList.get(i).get("Name").toString());
names.add(userList.get(i).get("Headline").toString());
names.add(userList.get(i).get("Age").toString());
// names.add(userList.get(i).getParseObject("ProfilePicture").;
}
usersListView = (ListView)findViewById(R.id.usersListView);
namesArrayAdapter =
new ArrayAdapter<String>(getApplicationContext(),
R.layout.user_list_item, names);
usersListView.setAdapter(namesArrayAdapter);
usersListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View v, int i, long l) {
openConversation(names, i);
}
});
} else {
Toast.makeText(getApplicationContext(),
"Error loading user list",
Toast.LENGTH_LONG).show();
}
}
});
}
public void openConversation(ArrayList<String> names, int pos) {
ParseQuery<ParseUser> query = ParseUser.getQuery();
query.whereEqualTo("Name", names.get(pos));
query.findInBackground(new FindCallback<ParseUser>() {
public void done(List<ParseUser> user, ParseException e) {
if (e == null) {
Intent intent = new Intent(getApplicationContext(), MessagingActivity.class);
intent.putExtra("RECIPIENT_ID", user.get(0).getObjectId());
startActivity(intent);
} else {
Toast.makeText(getApplicationContext(),
"Error finding that user",
Toast.LENGTH_SHORT).show();
}
}
});
}
}
public class Fragment1 extends Fragment {
private String currentUserId;
private ArrayAdapter<String> namesArrayAdapter;
private ArrayList<String> names;
private ListView usersListView;
private Button logoutButton;
String userGender = ParseUser.getCurrentUser().getString("Gender");
String activityName = ParseUser.getCurrentUser().getString("ActivityName");
Number maxDistance = ParseUser.getCurrentUser().getNumber("Maximum_Distance");
String userLookingGender = ParseUser.getCurrentUser().getString("Looking_Gender");
Number minimumAge = ParseUser.getCurrentUser().getNumber("Minimum_Age");
Number maximumAge = ParseUser.getCurrentUser().getNumber("Maximum_Age");
Number userage = ParseUser.getCurrentUser().getNumber("Age");
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setConversationsList();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment1_layout, container, false);
return view;
}
private void setConversationsList() {
currentUserId = ParseUser.getCurrentUser().getObjectId();
names = new ArrayList<String>();
// String userActivitySelectionName = null;
ParseQuery<ParseUser> query = ParseUser.getQuery();
// query.whereEqualTo("ActivityName",userActivitySelectionName);
query.whereNotEqualTo("objectId", ParseUser.getCurrentUser().getObjectId());
// users with Gender = currentUser.Looking_Gender
query.whereEqualTo("Gender", userLookingGender);
// users with Looking_Gender = currentUser.Gender
query.whereEqualTo("Looking_Gender", userGender);
query.setLimit(1);
query.whereEqualTo("ActivityName", activityName);
//query.whereGreaterThanOrEqualTo("Age", minimumAge);
//query.whereLessThanOrEqualTo("Age", maximumAge);
query.orderByDescending("Name");
query.findInBackground(new FindCallback<ParseUser>() {
public void done(List<ParseUser> userList, ParseException e) {
if (e == null) {
for (int i=0; i<userList.size(); i++) {
names.add(userList.get(i).get("Name").toString());
names.add(userList.get(i).get("Headline").toString());
ParseFile image = (ParseFile) userData.getParseFile("ProfilePicture");
//call the function
displayImage(image, image_expert);
//and here is the function
private void displayImage(ParseFile thumbnail, final ImageView img) {
if (thumbnail != null) {
thumbnail.getDataInBackground(new GetDataCallback() {
@Override
public void done(byte[] data, ParseException e) {
if (e == null) {
Bitmap bmp = BitmapFactory.decodeByteArray(data, 0,
data.length);
if (bmp != null) {
Log.e("parse file ok", " null");
img.setImageBitmap(Bitmap.createScaledBitmap(bmp,
(display.getWidth() / 5),
(display.getWidth() /50), false));
img.setImageBitmap(getRoundedCornerBitmap(bmp, 10));
img.setPadding(10, 10, 0, 0);
}
} else {
Log.e("paser after downloade", " null");
}
}
});
} else {
Log.e("parse file", " null");
// img.setImageResource(R.drawable.ic_launcher);
img.setPadding(10, 10, 10, 10);
}
}
names.add(userList.get(i).get("Age").toString());
names.add(userList.get(i).get("ActivityName").toString());
// names.add(userList.get(i).getParseObject("ProfilePicture").;
}
usersListView = (ListView)getActivity().findViewById(R.id.userlistview);
namesArrayAdapter =
new ArrayAdapter<String>(getActivity().getApplicationContext(),
R.layout.user_list_item, names);
usersListView.setAdapter(namesArrayAdapter);
usersListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View v, int i, long l) {
openConversation(names, i);
}
});
} else {
Toast.makeText(getActivity().getApplicationContext(),
"Error loading user list",
Toast.LENGTH_LONG).show();
}
}
});
}
public void openConversation(ArrayList<String> names, int pos) {
ParseQuery<ParseUser> query = ParseUser.getQuery();
query.whereEqualTo("Name", names.get(pos));
query.findInBackground(new FindCallback<ParseUser>() {
public void done(List<ParseUser> user, ParseException e) {
if (e == null) {
Intent intent = new Intent(getActivity().getApplicationContext(), MessagingActivity.class);
intent.putExtra("RECIPIENT_ID", user.get(0).getObjectId());
startActivity(intent);
} else {
Toast.makeText(getActivity().getApplicationContext(),
"Error finding that user",
Toast.LENGTH_SHORT).show();
}
}
});
}
}
看看下面的内容是否有帮助：
ParseUser currentUser = ParseUser.getCurrentUser();
currentUser.fetchInBackground(new GetCallback<ParseObject>() {
public void done(ParseObject object, ParseException e) {
if (e == null) {
ParseFile file = (ParseFile)object.get("image");
if(file != null){
file.getDataInBackground(new GetDataCallback() {
public void done(byte[] data, ParseException e) {
if (e == null) {
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
if(bitmap != null){
imageAccount.setImageBitmap(bitmap);
}else{
Log.d(TAG, "file null?");
}
} else {
Log.d(TAG, "ParseFile ParseException: " + e.toString());
}
}
});
}else{
Log.d(TAG, "ParseFile is null");
}
} else {
Log.d(TAG, "ParseException: " + e.toString());
}
}
});
ParseUser currentUser=ParseUser.getCurrentUser（）；
currentUser.fetchInBackground（新的GetCallback（）{
公共无效完成（ParseObject对象，parsee异常）{
如果（e==null）{
ParseFile file=（ParseFile）object.get（“image”）；
如果（文件！=null）{
getDataInBackground（新的GetDataCallback（）{
公共无效完成（字节[]数据，解析异常e）{
如果（e==null）{
位图位图=位图工厂.decodeByteArray（数据，0，数据.length）；
if（位图！=null）{
设置图像位图（位图）；
}否则{
Log.d（标记“file null？”）；
}
}否则{
d（标记为“ParseFile ParseException:+e.toString（））；
}
}
});
}否则{
d（标记“ParseFile为null”）；
}
}否则{
d（标记“ParseException:+e.toString（））；
}
}
});
使用URL进行异步获取并生成本地位图，以便在视图中使用照片。您是否尝试过ParseUser.getCurrentUser（）.getBytes（字符串键）？感谢您的回复和建议。我还没有尝试过，但是，它不会选择当前用户的图像，而是将填充的每个用户的图像。在parse中，列被标识为文件而不是字符串，这就是为什么我不能检索字符串的原因。谢谢您的详细建议。我注意到这段代码指的是当前用户。它实际上会检索列表中每个人的个人资料图片。例如，current检索用户的姓名、标题和年龄。我遵循了您的建议，并在支持下尝试实现类似的功能。我已经在我最初的帖子的更新部分更新了我的帖子。如果你能调查一下，那将非常有帮助。谢谢你的回复。我已经在我的初始帖子的更新部分更新了我的帖子。我只是在实现它时遇到了一些问题。如果你能帮上忙，那就太好了
private void displayImage(ParseFile thumbnail, final ImageView img) {
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expected
- Syntax error on token "(", ;
expected
- Syntax error on token ")", ;
expected
ParseUser currentUser = ParseUser.getCurrentUser();
currentUser.fetchInBackground(new GetCallback<ParseObject>() {
public void done(ParseObject object, ParseException e) {
if (e == null) {
ParseFile file = (ParseFile)object.get("image");
if(file != null){
file.getDataInBackground(new GetDataCallback() {
public void done(byte[] data, ParseException e) {
if (e == null) {
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
if(bitmap != null){
imageAccount.setImageBitmap(bitmap);
}else{
Log.d(TAG, "file null?");
}
} else {
Log.d(TAG, "ParseFile ParseException: " + e.toString());
}
}
});
}else{
Log.d(TAG, "ParseFile is null");
}
} else {
Log.d(TAG, "ParseException: " + e.toString());
}
}
});