在这里，我想创建一个拥有profile activity的应用程序，用户可以在其中查看他/她的信息，activity有一个按钮用于编辑配置文件。单击按钮时，将打开新活动，用户可以在此处编辑信息并按保存按钮，然后返回到个人资料活动。所以我的问题是如何用编辑的信息重新加载配置文件活动？
这是我的编辑个人资料活动
public class EditProfileActivity extends AppCompatActivity implements View.OnClickListener {
Button save_profile;
RadioGroup radioGroup;
EditText user_name,user_email,user_phone,user_addhar_number,birthdate;
ImageView user_profile_bg,user_profile,back_arrow;
private static final int RESULT_LOAD_IMAGE=24;
//db_details
String db_email="",db_name="",db_birthday,db_phone=" ";
String db_profile_pic = "",db_profile_pic_bg = "",db_token="";
String email,phone,name,profile_pic_url=" ",gender=" ",birthday;
String token="",addhar_number,new_profile_pic_url;
private double currentLatitude;
private double currentLongitude;
private boolean check_flag = false;
byte[] profile_pic_array;
byte[] profile_pic_bg_array;
Bitmap bitmap_profile= null,bitmap_bg=null;
Calendar mycalender;
ImageView CurrentImageView = null;
int choosebutton;
private long imei_number = 0;
private ProgressDialog pDialog;
Bitmap selectedImage = null;
Bitmap selectedImage2 = null;
SQliteHandler db;
private static final String TAG = EditProfileActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_profile);
user_name =(EditText)findViewById(R.id.et_user_name);
user_email =(EditText)findViewById(R.id.et_user_email);
user_phone =(EditText)findViewById(R.id.et_user_phone);
user_addhar_number =(EditText)findViewById(R.id.et_user_aadhar_number);
birthdate = (EditText)findViewById(R.id.et_user_birthday);
user_profile_bg =(ImageView)findViewById(R.id.header_cover_image);
user_profile=(ImageView) findViewById(R.id.user_profile_photo);
back_arrow = (ImageView)findViewById(R.id.iv_back);
mycalender = Calendar.getInstance();
save_profile =(Button)findViewById(R.id.btn_profile_save);
db=new SQliteHandler(getApplicationContext());
pDialog = new ProgressDialog(this);
pDialog.setCancelable(false);
back_arrow.setOnClickListener(this);
save_profile.setOnClickListener(this);
user_profile_bg.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
check_flag =true;
CurrentImageView = (ImageView) v;
Intent gallery = new Intent(Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(gallery,RESULT_LOAD_IMAGE);
choosebutton=1;
}
});
user_profile.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
check_flag =true;
CurrentImageView = (ImageView) v;
Intent gallery = new Intent(Intent.ACTION_PICK,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(gallery,RESULT_LOAD_IMAGE);
choosebutton=2;
}
});
final DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
mycalender.set(Calendar.YEAR, year);
mycalender.set(Calendar.MONTH, monthOfYear);
mycalender.set(Calendar.DAY_OF_MONTH, dayOfMonth);
updateLabel();
}
};
if(db_birthday != null && db_birthday != " " ){
birthdate.setText(db_birthday);
birthdate.setClickable(false);
}else {
birthdate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new DatePickerDialog(EditProfileActivity.this, date, mycalender.get(Calendar.YEAR),
mycalender.get(Calendar.MONTH), mycalender.get(Calendar.DAY_OF_MONTH)).show();
}
});
}
Intent data = getIntent();
if(data.hasExtra("name") && data.hasExtra("email") && data.hasExtra("profile_url") && data.hasExtra("token")) {
name = data.getStringExtra("name");
email = data.getStringExtra("email");
profile_pic_url = data.getStringExtra("profile_url");
token = data.getStringExtra("token");
currentLatitude = data.getDoubleExtra("latitude",0.0);
currentLongitude = data.getDoubleExtra("longitude",0.0);
}else if(data.hasExtra("name") && data.hasExtra("email") && data.hasExtra("profile_url") && data.hasExtra("token")){
name = data.getStringExtra("name");
phone = data.getStringExtra("phone");
profile_pic_url = data.getStringExtra("profile_url");
token = data.getStringExtra("token");
currentLatitude = data.getDoubleExtra("latitude",0.0);
currentLongitude = data.getDoubleExtra("longitude",0.0);
}
//load user data from sqlite
if(email != null && email !=" ") {
HashMap<String, String> user = db.getuserdetails(email);
db_name = user.get("name");
db_email = user.get("email");
db_phone = user.get("phone");
db_profile_pic = user.get("profile_pic");
db_profile_pic_bg = user.get("profile_pic_bg");
birthday = user.get("birthday");
db_token= user.get("token");
}else if(phone != null && phone !=" "){
HashMap<String, String> user = db.getuserdetails(phone);
db_name = user.get("name");
db_email = user.get("email");
db_phone = user.get("phone");
db_profile_pic = user.get("profile_pic");
db_profile_pic_bg = user.get("profile_pic_bg");
birthday = user.get("birthday");
db_token= user.get("token");
}
user_name.setText(name);
if ((email != " " && email != null)&&(Patterns.EMAIL_ADDRESS.matcher(email).matches())){
user_email.setText(email);
KeyListener keyListener = user_email.getKeyListener();
user_email.setKeyListener(null);
}else if((phone !=" " && phone !=null)&& (Pattern.compile("^[789]\\d{9}$").matcher(phone).matches())) {
user_phone.setText("+91 " + phone);
KeyListener keyListener = user_phone.getKeyListener();
user_phone.setKeyListener(null);
}
Glide.with(this)
.load(profile_pic_url)
.placeholder(R.drawable.default_avtar)
.centerCrop()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.bitmapTransform(new CropCircleTransformation(this))
.into(user_profile);
radioGroup =(RadioGroup)findViewById(R.id.gender_rg);
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, @IdRes int i) {
RadioButton rb=(RadioButton)radioGroup.findViewById(i);
switch (i){
case R.id.rb_male:
gender = "male";
break;
case R.id.rb_female:
gender = "female";
break;
}
}
});
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btn_profile_save:
name = user_name.getText().toString();
email = user_email.getText().toString();
phone = user_phone.getText().toString();
addhar_number = user_addhar_number.getText().toString();
birthday = birthdate.getText().toString();
if(!check_flag) {
if (profile_pic_url != null && !profile_pic_url.equals(" ") && !profile_pic_url.isEmpty()) {
BitMap m = new BitMap();
try {
bitmap_profile = m.execute(profile_pic_url).get();
bitmap_bg = BitmapFactory.decodeResource(getResources(),R.drawable.beach);
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
profile_pic_array = bitmapToByte(bitmap_profile);
profile_pic_bg_array = bitmapToByte(bitmap_bg);
} else {
bitmap_profile = BitmapFactory.decodeResource(getResources(),R.drawable.default_avtar);
bitmap_bg = BitmapFactory.decodeResource(getResources(),R.drawable.beach);
profile_pic_array = bitmapToByte(bitmap_profile);
profile_pic_bg_array = bitmapToByte(bitmap_bg);
}
}else{
profile_pic_array = bitmapToByte(selectedImage2);
profile_pic_bg_array = bitmapToByte(selectedImage);
}
String profile_pic= null;
String profile_pic_bg = null;
profile_pic = Base64.encodeToString(profile_pic_array,Base64.DEFAULT);
profile_pic_bg = Base64.encodeToString(profile_pic_bg_array,Base64.DEFAULT);
db.updateUser(name,email,phone,addhar_number,gender,profile_pic,profile_pic_bg,birthday,token);
updateProfile();
break;
case R.id.iv_back:
Intent home = new Intent(getApplicationContext(),ProfileActivity.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(home);
break;
}
}
private void updateLabel() {
String myFormat = "dd/mm/yyyy"; //In which you need put here
SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.UK);
birthdate.setText(sdf.format(mycalender.getTime()));
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && data != null) {
Uri selected_image = data.getData();
new_profile_pic_url = selected_image.toString();
Log.d("new profile_pic_url",new_profile_pic_url);
String[] filePath = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selected_image,filePath,null,null,null);
cursor.moveToFirst();
String imagePath = cursor.getString(cursor.getColumnIndex(filePath[0]));
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
if(choosebutton==1) {
selectedImage = BitmapFactory.decodeFile(imagePath, options);
Glide.with(this)
.load(selected_image)
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(CurrentImageView);
}else if(choosebutton ==2){
selectedImage2 = BitmapFactory.decodeFile(imagePath, options);
Glide.with(this)
.load(selected_image)
.centerCrop()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.bitmapTransform(new CropCircleTransformation(this))
.into(CurrentImageView);
}
cursor.close();
}
}
public byte[] bitmapToByte(Bitmap bitmap){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG,0,baos);
return baos.toByteArray();
} private class BitMap extends AsyncTask<String, Void, Bitmap> {
@Override
protected Bitmap doInBackground(String... params) {
Bitmap bitmap = null;
try {
URL url = new URL(params[0]);
bitmap = BitmapFactory.decodeStream(url.openStream());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}
}
private void showDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hideDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
我的个人资料活动课就在这里
public class ProfileActivity extends Activity implements View.OnClickListener {
ImageView heder_bg,profile_pic,back;
Button edit_profile;
TextView tv_name,tv_email,tv_phone,tv_birthday;
String email=" ",phone=" ",name,profile_pic_url,token;
//db_details
String db_email="",db_name="",birthday = " ",db_phone=" ";
String db_profile_pic = "",db_profile_pic_bg = "";
private double currentLatitude;
private double currentLongitude;
//datetbase variables
SQliteHandler db;
private static final String TAG = ProfileActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
heder_bg =(ImageView)findViewById(R.id.profile_header_cover_image);
profile_pic = (ImageView)findViewById(R.id.profile_user_profile_photo);
back = (ImageView)findViewById(R.id.iv_profile_back);
edit_profile = (Button)findViewById(R.id.btn_edit_profile);
tv_name = (TextView)findViewById(R.id.profile_name);
tv_email = (TextView)findViewById(R.id.profile_email);
tv_phone = (TextView)findViewById(R.id.profile_phone);
tv_birthday = (TextView)findViewById(R.id.profile_birthday);
Intent data = getIntent();
if(data.hasExtra("name") && data.hasExtra("email") && data.hasExtra("profile_url") && data.hasExtra("token")) {
name = data.getStringExtra("name");
email = data.getStringExtra("email");
profile_pic_url = data.getStringExtra("profile_url");
token = data.getStringExtra("token");
currentLatitude = data.getDoubleExtra("latitude",0.0);
currentLongitude = data.getDoubleExtra("longitude",0.0);
}
else if(data.hasExtra("name") && data.hasExtra("email") && data.hasExtra("profile_url") && data.hasExtra("token")){
name = data.getStringExtra("name");
phone = data.getStringExtra("phone");
profile_pic_url = data.getStringExtra("profile_url");
token = data.getStringExtra("token");
currentLatitude = data.getDoubleExtra("latitude",0.0);
currentLongitude = data.getDoubleExtra("longitude",0.0);
}
db = new SQliteHandler(getApplicationContext());
//load user data from sqlite
if(email != null && email !=" ") {
HashMap<String, String> user = db.getuserdetails(email);
db_name = user.get("name");
db_email = user.get("email");
db_phone = user.get("phone");
db_profile_pic = user.get("profile_pic");
db_profile_pic_bg = user.get("profile_pic_bg");
birthday = user.get("birthday");
}else if(phone != null && phone !=" "){
HashMap<String, String> user = db.getuserdetails(phone);
db_name = user.get("name");
db_email = user.get("email");
db_phone = user.get("phone");
db_profile_pic = user.get("profile_pic");
db_profile_pic_bg = user.get("profile_pic_bg");
birthday = user.get("birthday");
}
edit_profile.setOnClickListener(this);
back.setOnClickListener(this);
load_user_info();
}
public void load_user_info(){
if(name != null && name !=""){
tv_name.setText(name);
}else if(db_name != null && db_name !=""){
tv_name.setText(db_name);
}
if (email != " " && email != null){
tv_email.setText(email);
}else if(db_email != null && db_email != "") {
tv_email.setText(db_email);
}else {
tv_email.setText(" ");
}
if(phone !=" " && phone !=null) {
tv_phone.setText("+91 " + phone);
}else if(db_phone !=null && db_phone !=" ") {
tv_phone.setText(db_phone);
}else {
tv_phone.setText("");
}
if(profile_pic_url!=null && profile_pic_url != "") {
Glide.with(this)
.load(profile_pic_url)
.error(R.drawable.default_avtar)
.centerCrop()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.bitmapTransform(new CropCircleTransformation(this))
.into(profile_pic);
Glide.with(this)
.load(R.drawable.beach)
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(heder_bg);
}
else if((db_profile_pic !=null && !db_profile_pic.equals(" "))&&(db_profile_pic_bg !=null && !db_profile_pic_bg.equals(" "))){
byte[] db_profile;
byte[] db_profile_bg;
Bitmap db_profile_bitmap,db_profile_pic_bg_bitmap;
db_profile = Base64.decode(db_profile_pic,Base64.DEFAULT);
db_profile_bitmap = getBitmap(db_profile);
db_profile_bg = Base64.decode(db_profile_pic_bg,Base64.DEFAULT);
db_profile_pic_bg_bitmap = getBitmap(db_profile_bg);
Glide.with(this)
.load(db_profile_bitmap)
.centerCrop()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.bitmapTransform(new CropCircleTransformation(this))
.into(profile_pic);
Glide.with(this)
.load(db_profile_pic_bg_bitmap)
.crossFade()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.into(heder_bg);
}else {
Glide.with(this)
.load(R.drawable.default_avtar)
.centerCrop()
.diskCacheStrategy(DiskCacheStrategy.ALL)
.bitmapTransform(new CropCircleTransformation(this))
.into(profile_pic);
Log.d("Default image set",TAG);
}
if(birthday !=" " && birthday !=null && birthday.equals("test")){
tv_birthday.setText("Born on " + birthday);
} else {
tv_birthday.setText(" ");
}
}
@Override
public void onResume(){
super.onResume();
load_user_info();
Log.d("in resume methode",TAG);
}
public Bitmap getBitmap(byte[] bitmap) {
return BitmapFactory.decodeByteArray(bitmap , 0, bitmap.length);
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btn_edit_profile:
Intent edit_profile = new Intent(getApplicationContext(),EditProfileActivity.class);
edit_profile.putExtra("name",name);
if((email !=null && email !="") && Patterns.EMAIL_ADDRESS.matcher(email).matches()) {
edit_profile.putExtra("email", email);
}else if(phone != null && phone !="") {
edit_profile.putExtra("phone", phone);
}
edit_profile.putExtra("profile_url",profile_pic_url);
edit_profile.putExtra("token",token);
edit_profile.putExtra("latitude",currentLatitude);
edit_profile.putExtra("longitude",currentLongitude);
startActivity(edit_profile);
break;
case R.id.iv_profile_back:
Intent home = new Intent(getApplicationContext(),HomeActivity.class);
startActivity(home);
break;
}
}
}
在OP发布代码之前
您可以定义一个为ProfileActivity加载数据的函数，并在onResume()中调用它。
@Override
public void onResume() {
super.onResume();
if (this.reloadNedeed)
this.reloadProfileData();
this.reloadNeeded = false; // do not reload anymore, unless I tell you so...
}
这样，既然onResume()也是在onCreate()之后调用的，那么你在第一次创建活动时和重新打开活动时都会使用相同的代码（例如，当你从另一个活动或其他应用程序返回时） 。
为了使其工作，默认情况下reloadNedeed必须设置为true：
private boolean reloadNeed = true;
为了启动EditActivity，您可以：
startActivityForResult(new Intent(EditActivity.class), EDIT_CODE);
其中EDIT_CODE可以是任何数字，例如：
private static final int EDIT_CODE = 31;
如果您想从EditActivity回来，请致电：
Intent returnIntent = new Intent();
setResult(Activity.RESULT_OK,returnIntent); // or RESULT_CANCELED if user did not make any changes
// it would be better to use some custom defined codes here
finish();
这将触发onActivityResult(int, int Intent)中的ProfileActivity函数，您可以在其中告诉活动重新加载数据。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == EDIT_CODE) { // Ah! We are back from EditActivity, did we make any changes?
if (resultCode == Activity.RESULT_OK) {
// Yes we did! Let's allow onResume() to reload the data
this.reloadNeeded = true;
}
}
onResume()在onActivityResult()之后被调用，因此我们可以安全地决定是否将reloadNeeded设置为true，或者只是将其置为假。
编辑：OP发布代码后
我没有测试过您的代码，但我可能只是通过查看它就找到了一些奇怪的东西。
我相信你的if-else conditions函数可能有一些load_user_info()的问题。
当您从EditActivity回来时，活动（很可能）不会再次创建。只调用onResume()，称为load_user_info();
但由于未重新创建Activity，因此您的变量在onCreate()中初始化时保持相同的值。
当他确实检查数据时：
if(name != null && name !=""){
tv_name.setText(name);
}else if(db_name != null && db_name !=""){
tv_name.setText(db_name);
}
你的活动说：
Heyy，名字不是空的并且不同于“”（顺便说一下你应该使用equals()，即使是文字）
因此，我将执行这段代码tv_name.setText(name);，因为它是一个if else语句，所以第二个块不会被执行。
所以你的活动，从未真正显示更新的数据。显示与之前相同的数据。
您应该尝试应用我在原始答案中发布的相同逻辑。
希望我理解你的问题是正确的......
有多种方法可以完成您的要求。有简单的（ish）方式和硬（er）和更正确的方式。
最简单的方法是刷新您正在返回的活动的onResume中所期望的数据。如果您导航到其他活动，则上一个活动将在您返回时调用onPause，然后调用onResume，此时您可以检查新数据并将其加载到位。那是更快捷的方式。
更好，更正确的方法是实现ViewModel并使用LiveData来允许Activity始终拥有最新的数据。这需要您的额外努力，以确保您的应用程序具有适当的架构，但从长远来看，更好的回报方式。查看Android的architecture components。
要刷新您的活动数据：
finish();
startActivity(getIntent());
onBackPressed或finish（）然后调用并刷新
@Override
public void onRestart()
{
super.onRestart();
finish();
startActivity(getIntent());
}
我希望这有用......