android-activity

问题 Is it possible to return object as a activity result from child activity to parent? Just something like: Intent resultIntent = new Intent(null); resultIntent.putExtra("STRING_GOES_HERE", myObject); setResult(resultIntent); finish(); If it is possible, how should I retrieve myObject in parent activity? I figured out, that to retrieve data I need to do something like this: protected void onActivityResult (int requestCode, int resultCode, Intent data) { if(requestCode == REQ_CODE_CHILD) {

问题 Is it possible to return object as a activity result from child activity to parent? Just something like: Intent resultIntent = new Intent(null); resultIntent.putExtra("STRING_GOES_HERE", myObject); setResult(resultIntent); finish(); If it is possible, how should I retrieve myObject in parent activity? I figured out, that to retrieve data I need to do something like this: protected void onActivityResult (int requestCode, int resultCode, Intent data) { if(requestCode == REQ_CODE_CHILD) {

问题 Is it possible to return object as a activity result from child activity to parent? Just something like: Intent resultIntent = new Intent(null); resultIntent.putExtra("STRING_GOES_HERE", myObject); setResult(resultIntent); finish(); If it is possible, how should I retrieve myObject in parent activity? I figured out, that to retrieve data I need to do something like this: protected void onActivityResult (int requestCode, int resultCode, Intent data) { if(requestCode == REQ_CODE_CHILD) {

问题 Google deprecate fragment’s onActivityCreated() on Android and recommend to use LifeCycleObserver: To get a callback specifically when a Fragment activity's * {@link Activity#onCreate(Bundle)} is called, register a * {@link androidx.lifecycle.LifecycleObserver} on the Activity's * {@link Lifecycle} in {@link #onAttach(Context)}, removing it when it receives the * {@link Lifecycle.State#CREATED} callback. So I try to make it in recommended way, but only state I can observe in Logcat is just

问题 I often find myself needing to access methods that require referencing some activity. For example, to use getWindowManager , I need to access some Activity. But often my code for using these methods is in some other class that has no reference to an activity. Up until now, I've either stored a reference to the main activity or passed the context of some activity to the class. Is there some better way to do this? 回答1: If you already have a valid context, just use this: Activity activity =

问题 I'm trying to design a page where address are stored in recycler view -> cardview. When the user clicks the add address button from the Activity A the user is navigated to the add address page in Activity B. Here the user can input customer name, address line 1 and address line two. Similarly, When the user clicks the edit address button from the Activity A**(data in activity A is passed to activity B)** the user is navigated to the edit address page in Activity B. Here the user can input

问题 I'm trying to design a page where address are stored in recycler view -> cardview. When the user clicks the add address button from the Activity A the user is navigated to the add address page in Activity B. Here the user can input customer name, address line 1 and address line two. Similarly, When the user clicks the edit address button from the Activity A**(data in activity A is passed to activity B)** the user is navigated to the edit address page in Activity B. Here the user can input

问题 I am unable to set the View Size matching the Display Size , below is the code, it is a Transparent View TestView testView; protected override void OnCreate(Bundle savedInstanceState) { base.OnCreate(savedInstanceState); testView = new TestView(this); SetContentView(testView); } The Default Height of the View when the app runs is height=1206 but the Display Height is 1280 , i have used the following methods to set the View Size match the Screen Size, but none works Does not work protected

问题 I'm trying to get Company id (&& Company name) in first activity, pass it into the second activity and there I'd like to retrieve all data from database based on that id (&& name), but the app crashes, below is the code. can someone provide me a working code snippet. Any kind of help will be appreciated. AdapterCompany public class AdapterCompany extends RecyclerView.Adapter<AdapterCompany.AdapterCompanyHolder> { private List<EntityCompany> entityCompanies = new ArrayList<>(); private

问题 I just started a new appliction using android studio .. but i need to open a web page in my application i tried using web view but it doesnt worked out... when i open my app it crashes down <WebView android:id="@+id/web_view" android:layout_width="fill_parent" android:layout_height="fill_parent" /> and i included in java class file private WebView wb; @Override protected void onCreate(Bundle savedInstanceState) { wb=(WebView)findViewById(R.id.web_view); WebSettings webSettings=wb.getSettings(