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配置文件图片可以选择和设置一段时间，但我们通常想要的（第一个对象）是当用户重新启动该页面时，应该是以前由用户设置的图像，如果用户没有设置该图像，则应该有默认图像。我已经使用了文本视图的共享首选项，但据说对于图像视图，通常最好先将选定的图像存储在SD卡中，然后获取该Uri，将其设置为字符串，然后将其用于共享首选项。我不知道是否可以通过onPause和onResume完成！如果是这样，那么应该选择哪种方式？以及如何做到这一点？另一件事是（第二个对象）我有一个活动，即用户配置文件，我想从编辑配置文件活动中充入数据（这里，用户选择的配置文件图片）。这与编辑配置文件的情况相同，如果用户没有设置自定义配置文件图片，则应该有默认图片。以下是我的编辑个人资料活动：如何：在SD卡中存储图像，存储和获取配置文件的共享首选图像路径
public class EditUserProfile extends AppCompatActivity {
private CoordinatorLayout coordinatorLayout;
public static final String Uimage = "Uimage";
public static final String Name = "nameKey";
public static final String UContact = "UContact";
public static final String Uemail = "Uemail";
private TextInputLayout inputLayoutName, inputLayoutEmail, inputLayoutContact;
private EditText usernameTextView, userEmailTextView, userContactTextView;
private ImageView userImageView;
SharedPreferences sharedpreferences;
private int PICK_IMAGE_REQUEST = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_user_profile);
Toolbar userProfileToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(userProfileToolbar);
inputLayoutName = (TextInputLayout) findViewById(R.id.input_layout_username);
inputLayoutEmail = (TextInputLayout) findViewById(R.id.input_layout_useremail);
inputLayoutContact = (TextInputLayout) findViewById(R.id.input_layout_usercontact);
userImageView = (ImageView) findViewById(R.id.userImage);
usernameTextView = (EditText) findViewById(R.id.username);
userContactTextView = (EditText) findViewById(R.id.usercontact);
userEmailTextView = (EditText) findViewById(R.id.useremail);
Button btnSave = (Button) findViewById(R.id.action_save);
sharedpreferences = getSharedPreferences(Uimage, Context.MODE_PRIVATE);
sharedpreferences = getSharedPreferences(Name, Context.MODE_PRIVATE);
sharedpreferences = getSharedPreferences(UContact, Context.MODE_PRIVATE);
sharedpreferences = getSharedPreferences(Uemail, Context.MODE_PRIVATE);
if (sharedpreferences.contains(Name)) {
usernameTextView.setText(sharedpreferences.getString(Name, ""));
}
if (sharedpreferences.contains(UContact)) {
userContactTextView.setText(sharedpreferences.getString(UContact, ""));
}
if (sharedpreferences.contains(Uemail)) {
userEmailTextView.setText(sharedpreferences.getString(Uemail, ""));
}
usernameTextView.addTextChangedListener(new MyTextWatcher(usernameTextView));
userEmailTextView.addTextChangedListener(new MyTextWatcher(userEmailTextView));
userContactTextView.addTextChangedListener(new MyTextWatcher(userContactTextView));
coordinatorLayout = (CoordinatorLayout) findViewById(R.id
.coordinatorLayout);
final ImageButton button = (ImageButton) findViewById(R.id.editImage);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
Intent intent = new Intent();
// Show only images, no videos or anything else
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
// Always show the chooser (if there are multiple options available)
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
Uri uri = data.getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
// Log.d(TAG, String.valueOf(bitmap));
userImageView.setImageBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* Validating form
*/
private boolean submitForm() {
if (!validateName()) {
return false;
}
if (!validateContact()) {
return false;
}
if (!validateEmail()) {
return false;
}
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "Saved!", Snackbar.LENGTH_LONG);
snackbar.show();
return true;
}
private boolean validateName() {
if (usernameTextView.getText().toString().trim().isEmpty()) {
inputLayoutName.setError(getString(R.string.err_msg_name));
requestFocus(usernameTextView);
return false;
} else {
inputLayoutName.setError(null);
}
return true;
}
private boolean validateEmail() {
String email = userEmailTextView.getText().toString().trim();
if (email.isEmpty() || !isValidEmail(email)) {
inputLayoutEmail.setError(getString(R.string.err_msg_email));
requestFocus(userEmailTextView);
return false;
} else {
inputLayoutEmail.setError(null);
}
return true;
}
private boolean validateContact() {
if (userContactTextView.getText().toString().trim().isEmpty()) {
inputLayoutContact.setError(getString(R.string.err_msg_contact));
requestFocus(userContactTextView);
return false;
} else {
inputLayoutContact.setError(null);
}
return true;
}
private static boolean isValidEmail(String email) {
return !TextUtils.isEmpty(email) && android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches();
}
private void requestFocus(View view) {
if (view.requestFocus()) {
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
}
}
private class MyTextWatcher implements TextWatcher {
private View view;
private MyTextWatcher(View view) {
this.view = view;
}
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
public void afterTextChanged(Editable editable) {
switch (view.getId()) {
case R.id.username:
validateName();
break;
case R.id.useremail:
validateEmail();
break;
case R.id.usercontact:
validateContact();
break;
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.editprofile_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_save:
if (!submitForm()){
return false;
}
TextView usernameTextView = (TextView) findViewById(R.id.username);
String usernameString = usernameTextView.getText().toString();
SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putString(Name, usernameString);
editor.apply();
TextView ucontactTV = (TextView) findViewById(R.id.usercontact);
String uContactS = ucontactTV.getText().toString();
editor.putString(UContact, uContactS);
editor.apply();
TextView uEmailTV = (TextView) findViewById(R.id.useremail);
String uEmailS = uEmailTV.getText().toString();
editor.putString(Uemail, uEmailS);
editor.apply();
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "Saved!", Snackbar.LENGTH_LONG);
snackbar.show();
Intent userProfileIntent = new Intent(EditUserProfile.this, UserProfile.class);
userProfileIntent.putExtra(Name, usernameString);
userProfileIntent.putExtra(UContact, uContactS);
userProfileIntent.putExtra(Uemail, uEmailS);
setResult(RESULT_OK, userProfileIntent);
finish();
}
return true;
}
}
以下是我想要的膨胀从编辑个人资料活动默认或自定义配置文件PIC的一样，我能够膨胀的文本视图其余用户配置文件活动：
public class UserProfile extends AppCompatActivity {
SharedPreferences sharedpreferences;
public static final String Uimage = "Uimage";
public static final String Name = "nameKey";
public static final String UContact = "UContact";
public static final String Uemail = "Uemail";
public static final int Edit_Profile = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_profile);
Toolbar userProfileToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(userProfileToolbar);
sharedpreferences = getSharedPreferences(Uimage, MODE_PRIVATE);
sharedpreferences = getSharedPreferences(Name, MODE_PRIVATE);
sharedpreferences = getSharedPreferences(UContact, MODE_PRIVATE);
sharedpreferences = getSharedPreferences(Uemail, MODE_PRIVATE);
displayMessage(sharedpreferences.getString(Name, ""));
displayUContact(sharedpreferences.getString(UContact, ""));
displayUEmail(sharedpreferences.getString(Uemail, ""));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.userprofile_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_editProfile:
Intent userProfileIntent = new Intent(UserProfile.this, EditUserProfile.class);
startActivityForResult(userProfileIntent, Edit_Profile);
return true;
}
return true;
}
// Call Back method to get the Message form other Activity
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case Edit_Profile:
if (resultCode == RESULT_OK) {
String name = data.getStringExtra(Name);
String Result_UContact = data.getStringExtra(UContact);
String Result_UEmail = data.getStringExtra(Uemail);
displayMessage(name);
displayUContact(Result_UContact);
displayUEmail(Result_UEmail);
}
break;
}
}
public void displayMessage(String message) {
TextView usernameTextView = (TextView) findViewById(R.id.importProfile);
usernameTextView.setText(message);
}
public void displayUContact(String contact) {
TextView userContactTextView = (TextView) findViewById(R.id.importContact);
userContactTextView.setText(contact);
}
public void displayUEmail(String email) {
TextView userEmailTextView = (TextView) findViewById(R.id.importEmail);
userEmailTextView.setText(email);
}
}
请考虑，我没有经验的编程，编码或Android开发，我刚开始学习！
...以及如何将图像存储到内部存储？ （因为有些设备并没有真正的外置SD卡！） –
我想我不需要将图像存储在除原始图像以外的任何位置，因为它似乎毫无意义（来自新手视图），因为它可以从那里删除所以我最好把它存储在服务器端！ –