我已经成功地将用户输入的信息存储到解析中，但我一直很难将图像存储到解析中，以便以后能够检索。
为了澄清这一点，下面是我用于个人资料创建 Activity 的代码，该 Activity 是在用户使用社交媒体签名并回答一系列问题(例如年龄、首选名称以及这些信息的位置)后提示的 Activity 稍后在解析数据库中更新并添加到当前用户。
此外，在 Activity 中，用户已经能够从他们的设备上传图片，我的问题现在解决了获取上传的图片并将其存储在解析中，以及将图像与使用其社交媒体签名的当前用户相关联媒体帐户 - 社交媒体集成是通过解析完成的。
我已经查看了以下指南，但仍然很困惑。 https://www.parse.com/docs/android_guide#files
现在我已经尝试完成此任务，并在下面的代码中留下了我的评论。
任何帮助将不胜感激。提前致谢。
public class ProfileCreation extends Activity {
private static final int RESULT_LOAD_IMAGE = 1;
FrameLayout layout;
Button save;
protected EditText mName;
protected EditText mAge;
protected EditText mHeadline;
protected ImageView mprofilePicture;
protected Button mConfirm;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile_creation);
RelativeLayout v = (RelativeLayout) findViewById(R.id.main);
v.requestFocus();
Parse.initialize(this, "ID", "ID");
mName = (EditText)findViewById(R.id.etxtname);
mAge = (EditText)findViewById(R.id.etxtage);
mHeadline = (EditText)findViewById(R.id.etxtheadline);
mprofilePicture = (ImageView)findViewById(R.id.profilePicturePreview);
mConfirm = (Button)findViewById(R.id.btnConfirm);
mConfirm.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String name = mName.getText().toString();
String age = mAge.getText().toString();
String headline = mHeadline.getText().toString();
age = age.trim();
name = name.trim();
headline = headline.trim();
if (age.isEmpty() || name.isEmpty() || headline.isEmpty()) {
AlertDialog.Builder builder = new AlertDialog.Builder(ProfileCreation.this);
builder.setMessage(R.string.signup_error_message)
.setTitle(R.string.signup_error_title)
.setPositiveButton(android.R.string.ok, null);
AlertDialog dialog = builder.create();
dialog.show();
}
else {
// create the new user!
setProgressBarIndeterminateVisibility(true);
ParseUser currentUser = ParseUser.getCurrentUser();
/* This is the section where the images is converted, saved, and uploaded. I have not been able Locate the image from the ImageView, where the user uploads the picture to imageview from either their gallery and later on from facebook */
Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
/*fron image view */);
// Convert it to byte
ByteArrayOutputStream stream = new ByteArrayOutputStream();
// Compress image to lower quality scale 1 - 100
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] image = stream.toByteArray();
// Create the ParseFile
ParseFile file = new ParseFile("profilePicture.png", image);
// Upload the image into Parse Cloud
file.saveInBackground();
// Create a column named "ImageName" and set the string
currentUser.put("ImageName", "AndroidBegin Logo");
// Create a column named "ImageFile" and insert the image
currentUser.put("ProfilePicture", file);
// Create the class and the columns
currentUser.saveInBackground();
currentUser.put("name", name);
currentUser.put("age", age);
currentUser.put("headline", headline);
currentUser.saveInBackground(new SaveCallback() {
@Override
public void done(ParseException e) {
setProgressBarIndeterminateVisibility(false);
if (e == null) {
// Success!
Intent intent = new Intent(ProfileCreation.this, MoodActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
}
else {
AlertDialog.Builder builder = new AlertDialog.Builder(ProfileCreation.this);
builder.setMessage(e.getMessage())
.setTitle(R.string.signup_error_title)
.setPositiveButton(android.R.string.ok, null);
AlertDialog dialog = builder.create();
dialog.show();
}
}
});
}
}
});
SeekBar seekBar = (SeekBar) findViewById(R.id.seekBarDistance);
final TextView seekBarValue = (TextView) findViewById(R.id.seekBarDistanceValue);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
seekBarValue.setText(String.valueOf(progress));
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
}); // Add this
Button mcancel = (Button)findViewById(R.id.btnBack);
mcancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ProfileCreation.this.startActivity(new Intent(ProfileCreation.this, LoginActivity.class));
}
});
SeekBar seekBarMinimum = (SeekBar) findViewById(R.id.seekBarMinimumAge);
final TextView txtMinimum = (TextView) findViewById(R.id.tMinAge);
seekBarMinimum.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
txtMinimum.setText(String.valueOf(progress));
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
}); // Add this
SeekBar seekBarMaximum = (SeekBar) findViewById(R.id.seekBarMaximumAge);
final TextView txtMaximum = (TextView) findViewById(R.id.tMaxAge);
seekBarMaximum.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
txtMaximum.setText(String.valueOf(progress));
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
}); // Add this
Button buttonLoadImage = (Button) findViewById(R.id.btnPictureSelect);
buttonLoadImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK
&& null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
ImageView imageView = (ImageView) findViewById(R.id.profilePicturePreview);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
}
private byte[] readInFile(String path) throws IOException {
// TODO Auto-generated method stub
byte[] data = null;
File file = new File(path);
InputStream input_stream = new BufferedInputStream(new FileInputStream(
file));
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
data = new byte[16384]; // 16K
int bytes_read;
while ((bytes_read = input_stream.read(data, 0, data.length)) != -1) {
buffer.write(data, 0, bytes_read);
}
input_stream.close();
return buffer.toByteArray();
}
}
最佳答案
您需要等待文件保存完成，然后才能将其添加到用户。
尝试向 file.saveInBackground() 调用添加一个完成 block ，并将所有 currentUser 操作移至该完成 block 中。
关于java - 上传图片时出现问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25234610/