我有一项活动，用户可以更新与其个人资料相关的一些数据（例如，他的名字），他还可以上传新的个人资料图片。
更新操作后，用户将被重定向到新活动。 问题是当用户回到他的个人资料活动时，显示的图像仍然是旧的，而不是新的，而名称更新正确。
要查看新的个人资料图片，用户需要关闭该应用并再次打开。
我该如何解决这个问题？ 我使用函数updateInfo（），但似乎无法正常工作。
请帮帮我吗？
public class ProfileActivity extends BaseActivity implements ProfileView {
@BindView(R.id.avatar)
ImageView p_avatar;
@BindView(R.id.ib_back)
ImageButton ibBack;
@BindView(R.id.txt_title)
TextView txtTitle;
@BindView(R.id.ib_right)
ImageButton ibRight;
@BindView(R.id.toolbar)
Toolbar toolbar;
@BindView(R.id.et_fullname)
EditText etFullname;
@BindView(R.id.et_email)
EditText etEmail;
@BindView(R.id.btn_update)
Button btnUpdate;
@BindView(R.id.txt_logout)
TextView txtLogout;
@BindView(R.id.ll_main)
LinearLayout llMain;
private static final String TAG = "ProfileActivity";
private String userName = null, userEmail = null;
private ProfilePresenter profilePresenter;
private Dialog dialog;
Bitmap FixBitmap;
Bitmap bitmap_to_save;
ImageView ShowSelectedImage;
String converted_img;
ByteArrayOutputStream byteArrayOutputStream;
byte[] byteArray ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
ButterKnife.bind(this);
byteArrayOutputStream = new ByteArrayOutputStream();
init_view();
upDateInfo();
}
private void init_view() {
txtTitle.setText(R.string.profileActivity_title);
ibRight.setImageResource(R.drawable.ic_edit);
dialog = commonUtils.createCustomLoader(ProfileActivity.this, false);
profilePresenter = new ProfilePresenterImpl(this);
upDateInfo();
}
private void upDateInfo() {
if (Conts.USERINFO != null) {
String subName = firstTwoChar(Conts.USERINFO.getName());
// Picasso.get().load("http://www.server.com/uploads/avatars/73.png").transform(transformation).into(p_avatar);
final int radius = 30;
final int margin = 1;
final RoundedCornersTransformation transformation = new RoundedCornersTransformation(radius, margin);
Picasso.get().load("http://www.server.com/uploads/avatars/"+Conts.USERINFO.getId()).transform(transformation).into(p_avatar);
etFullname.setText(Conts.USERINFO.getName().toLowerCase());
etFullname.setEnabled(false);
etEmail.setText(Conts.USERINFO.getEmail());
etEmail.setEnabled(false);
btnUpdate.setVisibility(View.INVISIBLE);
}
}
@OnClick({R.id.ib_back, R.id.ib_right, R.id.btn_update, R.id.txt_logout, R.id.avatar})
public void onClick(View view) {
switch (view.getId()) {
case R.id.ib_back:
onBackPressed();
break;
case R.id.ib_right:
etFullname.setEnabled(true);
etFullname.setSelection(etFullname.getText().toString().length());
btnUpdate.setVisibility(View.VISIBLE);
Log.d(TAG, "validate ID: " + Conts.USERINFO.getId());
return;
case R.id.avatar:
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Image From Gallery"), 1);
return;
case R.id.btn_update:
if (validate()) {
if (!commonUtils.isNetworkAvailable()) {
Toast.makeText(this, "No Internet Connection", Toast.LENGTH_SHORT).show();
return;
}
profilePresenter.dataListAPI(Conts.USERINFO.getId(), userName, Conts.USERINFO.getEmail(), converted_img);
}
break;
case R.id.txt_logout:
get_dialog();
break;
}
}
@Override
protected void onActivityResult(int RC, int RQC, Intent I) {
super.onActivityResult(RC, RQC, I);
if (RC == 1 && RQC == RESULT_OK && I != null && I.getData() != null) {
Uri uri = I.getData();
try {
FixBitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
bitmap_to_save = scaleBitmapAndKeepRation(FixBitmap, 320, 320);
RoundedBitmapDrawable roundedBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), bitmap_to_save);
final float roundPx = (float) bitmap_to_save.getWidth() * 0.15f;
roundedBitmapDrawable.setCornerRadius(roundPx);
roundedBitmapDrawable.setAntiAlias(true);
p_avatar.setImageDrawable(roundedBitmapDrawable);
bitmap_to_save.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);
byteArray = byteArrayOutputStream.toByteArray();
converted_img = Base64.encodeToString(byteArray, Base64.DEFAULT); // this is the image string to send to the server!
} catch (IOException e) {
e.printStackTrace();
}
}
else {
Toast.makeText(this, "An error has occurred!", Toast.LENGTH_SHORT).show();
}
}
public static Bitmap scaleBitmapAndKeepRation(Bitmap TargetBmp, int reqHeightInPixels, int reqWidthInPixels)
{
Matrix m = new Matrix();
m.setRectToRect(new RectF(0, 0, TargetBmp.getWidth(), TargetBmp.getHeight()), new RectF(0, 0, reqWidthInPixels, reqHeightInPixels), Matrix.ScaleToFit.CENTER);
Bitmap scaledBitmap = Bitmap.createBitmap(TargetBmp, 0, 0, TargetBmp.getWidth(), TargetBmp.getHeight(), m, true);
return scaledBitmap;
}
@Override
public void onBackPressed() {
super.onBackPressed();
}
private void get_dialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setCancelable(false);
View view = LayoutInflater.from(this).inflate(R.layout.dialog_logout, null);
builder.setView(view);
final AlertDialog alertDialog = builder.create();
alertDialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);
alertDialog.show();
TextView txtyes, txtno;
txtyes = view.findViewById(R.id.txt_yes);
txtno = view.findViewById(R.id.txt_no);
txtyes.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
alertDialog.dismiss();
sharedPref.setBoolean(Conts.IsLogin, false);
sharedPref.clearAllPref();
Conts.USERINFO = null;
Intent iLogin = new Intent(ProfileActivity.this, MainActivity.class);
iLogin.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(iLogin);
}
});
txtno.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
alertDialog.dismiss();
}
});
}
public String firstTwoChar(String str) {
return str.length() < 2 ? str : str.substring(0, 2);
}
@Override
public void showLoader() {
dialog.show();
}
@Override
public void hideLoader() {
if (dialog != null)
dialog.dismiss();
}
@Override
public void showError(String msg) {
Snackbar snackbar = Snackbar
.make(llMain, msg, Snackbar.LENGTH_INDEFINITE)
.setAction("RETRY", new View.OnClickListener() {
@Override
public void onClick(View view) {
// nothing anything
}
});
snackbar.show();
// Changing message text color
snackbar.setActionTextColor(Color.RED);
// Changing action button text color
View sbView = snackbar.getView();
TextView textView = (TextView) sbView.findViewById(android.support.design.R.id.snackbar_text);
textView.setTextColor(Color.WHITE);
snackbar.show();
}
@Override
public Context getContextAppp() {
return this;
}
@Override
public void onBackPress() {
}
@Override
public void successResponse(Data data) {
if (data != null) {
Toast.makeText(this, "Profile updated successfully", Toast.LENGTH_SHORT).show();
UserInfo userInfo = new UserInfo(data.getId(), data.getName(), data.getEmail());
Conts.USERINFO = userInfo;
String userinfo = gson.toJson(Conts.USERINFO, UserInfo.class);
sharedPref.setDataInPref(Conts.UserInfo, userinfo);
startActivity(getIntent());
Intent iPlace = new Intent(ProfileActivity.this, AddPlaceActivity.class);
iPlace.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
Toast.makeText(this, "Profile saved!", Toast.LENGTH_SHORT).show();
startActivity(iPlace);
}
}
@Override
public void errorResponce(String msg) {
if (msg != null) {
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
}
}
private boolean validate() {
commonUtils.hideKeyboard(this);
if (etFullname.getText().toString().trim().isEmpty()) {
Toast.makeText(this, "Please enter Fullname", Toast.LENGTH_SHORT).show();
} else if (etFullname.getText().toString().trim().length() <= 2) {
Toast.makeText(this, "Minimum 3 character require", Toast.LENGTH_SHORT).show();
} else if (etFullname.getText().toString().trim().length() > 30) {
Toast.makeText(this, "Maximum 30 character require", Toast.LENGTH_SHORT).show();
}
/*else if (etEmail.getText().toString().trim().isEmpty()) {
Toast.makeText(this, "Please enter Email", Toast.LENGTH_SHORT).show();
} else if (!validation.checkEmail(etEmail)) {
Toast.makeText(this, "Please enter valid Email", Toast.LENGTH_SHORT).show();
}
*/
if (!etFullname.getText().toString().trim().isEmpty() && etFullname.getText().toString().trim().length() > 2 && etFullname.getText().toString().trim().length() <= 30) {
userName = etFullname.getText().toString().trim();
} else {
userName = null;
}
/*if (!etEmail.getText().toString().trim().isEmpty() && validation.checkEmail(etEmail)) {
userEmail = etEmail.getText().toString().trim();
} else {
userEmail = null;
}
*/
if (userName != null /*&& userEmail != null*/) {
Log.d(TAG, "validate: " + userName);
return true;
} else {
return false;
}
}
}
答案 0 :(得分：1)
当您返回到个人资料活动时，您的应用程序的任务堆栈将恢复已在内存中的个人资料活动。因此，您应该通知您的个人资料活动它已更新。在您的个人资料活动的onStart回调中，检查它是否已更新。如果是这样加载新图像。简而言之，将upDateInfo（）方法放在onStart（）中。
答案 1 :(得分：1)
更新信息后，在callback方法onResponse中，您需要在成功完成信息更新后调用updateInfo()在您的用户界面上进行更新。确保您从服务器提供新值，尤其是static变量，因为只要应用程序处于活动状态，它们就会保留值。如果您不使用新值更新它们，它们将保留旧值。
目前，您正在尝试仅在需要创建onCreate()时调用的Activity中更新信息。在这种情况下，只有当您在Back按钮上按Home按钮退出并再次输入应用程序时，它才会在操作系统销毁应用程序之前无法正常工作。
您还可以使用onResume方法，该方法在暂停时返回Activity时调用，并且在您已经退出时创建新Activity时会发生这种情况。