我创建了一个Firebase应用程序。
到目前为止，一切都很好。但是，我有一个无法解决的问题。
我的MainActivity.java正在实现Interface ProgressDisplay.javaInterface有两种方法：
public interface ProgressDisplay {
public void showProgress();
public void hideProgress();
}
我无法从子片段中调用这两种方法，我无法在片段中设置可见性。
ManageAccountFragment.java
package com.company.walt.fragments;
public class ManageAccountFragment extends Fragment {
private EditText mName;
private Button mUpdateBtn;
private ProgressBar mProgressBar;
public ManageAccountFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_manage_account, container, false);
mName = (EditText)view.findViewById(R.id.input_name);
mUpdateBtn = (Button)view.findViewById(R.id.btn_update);
mUpdateBtn.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view){
if (!isEmpty (mName.getText().toString()))
{
showProgress();
Toast.makeText(getActivity(), "SHOW DIALOG", Toast.LENGTH_SHORT).show();
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user != null)
{
UserProfileChangeRequest profileUpdate = new UserProfileChangeRequest.Builder()
.setDisplayName(mName.getText().toString())
//.setPhotoUri(Uri.parse("https://avatarfiles.alphacoders.com/862/86285.jpg"))
.build();
user.updateProfile(profileUpdate).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful())
{
Log.d(TAG, "onComplete: User Profile updated");
}
}
});
hideProgress();
Toast.makeText(getActivity(), "HIDE DIALOG", Toast.LENGTH_SHORT).show();
}
}
}
});
hideSoftKeyboard();
return view;
}
private boolean isEmpty(String string){
return string.equals("");
}
/**
* Display progressbar
*/
protected void showProgress() {
if (getActivity() instanceof ProgressDisplay) {
((ProgressDisplay) getActivity()).showProgress();
}
}
/**
* Hide progressbar
*/
protected void hideProgress() {
if (getActivity() instanceof ProgressDisplay) {
((ProgressDisplay) getActivity()).hideProgress();
}
}
private void hideSoftKeyboard(){
getActivity().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
}
}
MainActivity.java
package com.company.walt.activities;
public class MainActivity extends AppCompatActivity implements ProgressDisplay {
private static final String TAG = "MainActivity";
private static final int USER_PROFILE = 1;
private static final int PROFILE_MANAGE = 2;
private static final int PROFILE_SETTING = 3;
private Toolbar mainToolbar;
private AccountHeader headerResult = null;
private Drawer result = null;
private ProgressBar mProgressBar;
private ToggleButton switcher;
@Override
protected void onCreate(Bundle savedInstanceState) {
if(AppCompatDelegate.getDefaultNightMode() == AppCompatDelegate.MODE_NIGHT_YES) { setTheme(R.style.NightTheme); }
else { setTheme(R.style.LightTheme);}
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
switchAppTheme();
createToolbar();
mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
buildHeader(false, savedInstanceState);
createDrawerBuilder();
getUserDetails();
}
@Override
protected void onResume() {
super.onResume();
checkAuthenticationState();
}
/**
* Used to check if user is authenticated or not
*/
private void checkAuthenticationState()
{
Log.d(TAG, "checkAuthenticationState: checking authentication state.");
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user == null){
Log.d(TAG, "checkAuthenticationState: user is null, navigating back to login screen.");
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(intent);
finish();
}
else {
Log.d(TAG, "checkAuthenticationState: user is authenticated.");
}
}
/**
* Used to switch between light and dark mode
*/
public void switchAppTheme() {
switcher = (ToggleButton) findViewById(R.id.switcher);
if(AppCompatDelegate.getDefaultNightMode() == AppCompatDelegate.MODE_NIGHT_YES) {
switcher.setChecked(true);
}
switcher.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
restartApp();
} else{
AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
restartApp();
}
}
});
}
/**
* Used to create the toolbar on top
*/
private void createToolbar(){
mainToolbar = (Toolbar) findViewById(R.id.main_toolbar);
setSupportActionBar(mainToolbar);
getSupportActionBar().setTitle(R.string.app_name);
}
/**
* small helper method to reuse the logic to build the AccountHeader
* this will be used to replace the header of the drawer with a compact/normal header
*
* @param compact
* @param savedInstanceState
*/
private void buildHeader(boolean compact, Bundle savedInstanceState) {
IProfile profile_1;
//IProfile profile_2;
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user != null)
{
String uid = user.getUid();
String name = user.getDisplayName();
String email = user.getEmail();
Uri photoUrl = user.getPhotoUrl();
profile_1 = new ProfileDrawerItem()
.withName(name)
.withEmail(email)
.withIcon(photoUrl);
//profile_2 = new ProfileDrawerItem().withName("Isensei").withEmail("[email protected]").withIcon(getResources().getDrawable(R.drawable.ic_user_58dp));
headerResult = new AccountHeaderBuilder()
.withActivity(this)
.withHeaderBackground(R.drawable.ip_menu_header_bg)
.withCompactStyle(compact)
.addProfiles(
profile_1,
//profile_2,
new ProfileSettingDrawerItem()
.withName("Manage Account")
.withDescription("Manage your details")
.withIcon(new IconicsDrawable(this,GoogleMaterial.Icon.gmd_settings)
.actionBar().colorRes(R.color.material_drawer_dark_primary_text)).withIdentifier(PROFILE_MANAGE),
new ProfileSettingDrawerItem()
.withName("Add Account")
.withDescription("Register new account")
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_person_add)
.actionBar().colorRes(R.color.material_drawer_dark_primary_text)).withIdentifier(PROFILE_SETTING)
)
.withOnAccountHeaderListener(new AccountHeader.OnAccountHeaderListener() {
@Override
public boolean onProfileChanged(View view, IProfile profile, boolean current) {
//sample usage of the onProfileChanged listener
//if the clicked item has the identifier 1 add a new profile ;)
if (profile instanceof IDrawerItem && ((IDrawerItem) profile).getIdentifier() == USER_PROFILE)
{
// Navigate to home fragment
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
Fragment fragment = new Fragment();
fragment = new HomeFragment();
transaction.replace(R.id.flContent, fragment);
transaction.commit();
}
if (profile instanceof IDrawerItem && ((IDrawerItem) profile).getIdentifier() == PROFILE_MANAGE)
{
// Navigate to home fragment
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
Fragment fragment = new Fragment();
fragment = new ManageAccountFragment();
transaction.replace(R.id.flContent, fragment);
transaction.commit();
}
else if (profile instanceof IDrawerItem && ((IDrawerItem) profile).getIdentifier() == PROFILE_SETTING)
{
Toast.makeText(MainActivity.this, "ACCOUNT", Toast.LENGTH_SHORT).show();
}
/*
if (profile instanceof IDrawerItem && ((IDrawerItem) profile).getIdentifier() == PROFILE_SETTING) {
IProfile newProfile = new ProfileDrawerItem()
.withNameShown(true)
.withName("Kensei")
.withEmail("[email protected]")
.withIcon(getResources().getDrawable(R.drawable.ic_user_58dp));
if (headerResult.getProfiles() != null) {
//we know that there are 2 setting elements. set the new profile above them ;)
headerResult.addProfile(newProfile, headerResult.getProfiles().size() - 2);
} else {
headerResult.addProfiles(newProfile);
}
}
*/
//false if you have not consumed the event and it should close the drawer
return false;
}
})
.build();
}
}
/**
* Used to create the drawer with all the icons and items
*/
private void createDrawerBuilder(){
//create the drawer and remember the `Drawer` result object
result = new DrawerBuilder()
.withActivity(this)
.withAccountHeader(headerResult)
.withToolbar(mainToolbar)
.addDrawerItems(
new SecondaryDrawerItem().withName(R.string.drawer_services)
.withIdentifier(1)
.withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_device_hub))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_products)
.withIdentifier(2)
.withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_shopping_cart))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_photos)
.withIdentifier(3)
.withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_camera_roll))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_poem)
.withIdentifier(4)
.withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_content_copy))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_archives)
.withIdentifier(5)
.withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_folder_open))
.withTag("Bullhorn"),
new SectionDrawerItem().withName(R.string.drawer_section_header).withEnabled(false),
new SecondaryDrawerItem().withName(R.string.drawer_settings)
.withIdentifier(6)
.withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_settings))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_feedback)
.withIdentifier(7)
.withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_headset_mic))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_pro)
.withIdentifier(8)
.withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_security))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_logout)
.withIdentifier(9)
.withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_power_settings_new))
.withTag("Bullhorn")
)
.withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
@Override
public boolean onItemClick(View view, int position, IDrawerItem drawerItem) {
navigateDrawerItem((int)drawerItem.getIdentifier(), drawerItem);
return true;
}
})
.addStickyDrawerItems(
new SecondaryDrawerItem().withName(R.string.drawer_all_right_reserved).withIcon(FontAwesome.Icon.faw_copyright).withEnabled(false)
).build();
}
/**
* Used to navigate to drawer fragment items
*/
public void navigateDrawerItem(int ItemId, IDrawerItem drawerItem) {
// Create a new fragment and specify the fragment to show based on nav item clicked
Fragment fragment = null;
Class fragmentClass;
switch(ItemId) {
case 1:
fragmentClass = ServicesFragment.class;
break;
case 2:
fragmentClass = ProductsFragment.class;
break;
case 3:
fragmentClass = PhotosFragment.class;
break;
case 4:
fragmentClass = PoemsFragment.class;
break;
case 5:
fragmentClass = ArchivesFragment.class;
break;
case 6:
fragmentClass = SettingsFragment.class;
break;
default:
fragmentClass = HomeFragment.class;
}
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
result.closeDrawer();
}
/*
private void setUserDetails(){
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user != null)
{
UserProfileChangeRequest profileUpdate = new UserProfileChangeRequest.Builder()
.setDisplayName("Jsk Zack")
.setPhotoUri(Uri.parse("https://avatarfiles.alphacoders.com/862/86285.jpg"))
.build();
user.updateProfile(profileUpdate).addOnCompleteListener(new OnCompleteListener<Void>() {
@Override
public void onComplete(@NonNull Task<Void> task) {
if (task.isSuccessful())
{
Log.d(TAG, "onComplete: User Profile updated");
getUserDetails();
}
}
});
}
}
*/
private void getUserDetails(){
FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
if (user != null)
{
String uid = user.getUid();
String name = user.getDisplayName();
String email = user.getEmail();
Uri photoUrl = user.getPhotoUrl();
String properties =
"uid: " + uid + "\n" +
"name: " + name + "\n" +
"email: " + email + "\n" +
"photoUrl: " + photoUrl;
Log.d(TAG, "getUserDetails: properties: \n" + properties);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
default:
return super.onOptionsItemSelected(item);
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
//add the values which need to be saved from the drawer to the bundle
outState = result.saveInstanceState(outState);
//add the values which need to be saved from the accountHeader to the bundle
outState = headerResult.saveInstanceState(outState);
super.onSaveInstanceState(outState);
}
@Override
public void onBackPressed() {
//handle the back press :D close the drawer first and if the drawer is closed close the activity
if (result != null && result.isDrawerOpen()) {
result.closeDrawer();
} else {
super.onBackPressed();
}
}
/**
* Display progressbar
*/
public void showProgress() {
findViewById(R.id.progressBar).setVisibility(View.VISIBLE);
}
/**
* Hide progressbar
*/
public void hideProgress() {
if(mProgressBar.getVisibility() == View.VISIBLE){
findViewById(R.id.progressBar).setVisibility(View.INVISIBLE);
}
}
/**
* Used to relaunch the application
*/
public void restartApp() {
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(intent);
finish();
}
}
我不知道为什么这不起作用，我做错了什么吗？
最佳答案
我认为是因为这行代码
findViewById(R.id.progressBar).setVisibility(View.INVISIBLE);
只需在主要活动onCreate（）{HERE}中实例化进度栏，然后在“隐藏和显示”功能中使用mProgressBar
public void showProgress() {
mProgressBar .setVisibility(View.VISIBLE);
}
我希望这有帮助 ;）