MyDevelopingJournal

Emm.. yeah.. emm.. hehe :)

Cases

1. Your home app displays Toolbar that can be scrolled, and there is a framelayout contains fragment. This fragment contains viewpagers (yes, multiple viewpager) which are displaying recyclerview. What you are gonna do is you wrapped the framelayoutin the activity inside NestedScrollview. Then in the layout fragment, wrapped entire layout with nestedscrollview again for scrolling those multiple viewpager. Put each viewpager absolute height neither wrap content nor match_parent.

Like this

activity_main ```xml <?xml version=”1.0” encoding=”utf-8”?>

> fragment_main

```xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/scroll_root"
    android:background="@color/white_light"
    app:layout_behavior="@string/appbar_sc_view_behavior"
    >

        <android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

        <android.support.design.widget.TabLayout
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:id="@+id/tab_a_b"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            app:layout_constraintTop_toBottomOf="@+id/layout_point"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:tabIndicatorColor="@color/color_tab_indicator"
            app:tabSelectedTextColor="@color/color_tab_text_selected"
            app:tabTextColor="@color/color_tab_text"
            app:tabTextAppearance="@style/AppTheme.TextAppearance.Tab"
            >

            <android.support.design.widget.TabItem
                android:id="@+id/tab_item_a"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/promo" />

            <android.support.design.widget.TabItem
                android:id="@+id/tab_item_b"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/spot" />

        </android.support.design.widget.TabLayout>

        <ScrollableViewPager
            android:id="@+id/pager_a_b"
            android:layout_width="match_parent"
            android:layout_height="400dp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/tab_a_b"
            />

        <android.support.design.widget.TabLayout
            android:focusable="true"
            android:focusableInTouchMode="true"
            android:id="@+id/tab_c_d"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            app:tabIndicatorColor="@color/color_tab_indicator"
            app:tabSelectedTextColor="@color/color_tab_text_selected"
            app:tabTextColor="@color/color_tab_text"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/pager_a_b"
            >

            <android.support.design.widget.TabItem
                android:id="@+id/tab_item_b"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/news" />

            <android.support.design.widget.TabItem
                android:id="@+id/tab_item_c"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/event" />

        </android.support.design.widget.TabLayout>

        <ScrollableViewPager
            android:id="@+id/pager_c_d"
            android:layout_width="match_parent"
            android:layout_height="400dp"
            android:nestedScrollingEnabled="true"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/tab_home_news_event"
            app:layout_constraintBottom_toBottomOf="parent"
            />


        </android.support.constraint.ConstraintLayout>
</android.support.v4.widget.NestedScrollView>

1. Use recyclerview and apply FlexBoxLayoutManager, like when you created items horizontally and wrapped to the width of device.

2. You have to set typeface programmatically to change Input Layout text/hint

3. For applying different colors in text, use foregroundcolorspan SpanableString(string) ForegroundColorSpan( StyleSpan(

4. LRUCache is flexible in terms of data type compared to SharedPreferences, but LRUCache accepts thread safe only.

5. Don’t use ListAdapter when it is so many user interactions, user recyclerview.adapter instead. submitlist still has an issue.

6. StartActivityForResult In Stacks https://medium.com/@douglas.iacovelli/android-send-result-back-through-multiple-activities-finished-or-not-4c2ba9e95112

https://www.google.com/search?client=firefox-b-d&q=FLAG_ACTIVITY_FORWARD_RESULT FLAG_ACTIVITY_FORWARD_RESULT

1. Look upon this link if your generating signed apk error https://stackoverflow.com/questions/24098494/error-when-generate-signed-apk/52403664

2. Consider to know the difference between SharedPreference.Editor.apply() and commit(). Commit() does the job immediately.

3. To sync-to not sync strategy: Using timestamp as flags, store the latest timestamp in SharedPreference

   • Using last upload time & last download time. When it’s more often to interact.
   • Using last update…. if it’s less often to interact.. like. Master Data.

https://coderwall.com/p/gt_rfa/simple-data-synchronisation-for-web-mobile-apps-working-offline

• last_update_on
• created_on
• deleted_on

https://dzone.com/articles/how-to-make-mobile-app-work-offline

• sync it using time stamp

https://medium.com/mindorks/to-synk-or-not-to-synk-fcc6e4c56e14

https://github.com/google/iosched

https://github.com/karntrehan/Posts

Read more

https://www.reddit.com/r/androiddev/comments/6bh31s/offlinefirst_with_sync_best_way_to_approach_this/

1. Clear Logs when in the release mode with proguard https://support.brightcove.com/removing-android-log-messages

2. Analyze the error when signed build apk https://stackoverflow.com/questions/24098494/error-when-generate-signed-apk

3. Use getText().clear() instead of setText(“”) to clear.

4. Always check permission list https://developer.android.com/guide/topics/permissions/overview

5. Adding filter list instead of replacinag

    InputFilter[] filterList = editText.getFilters();
    InputFilter[] newFilterList = new InputFilter[filterList.length + 1];
    System.arraycopy(filterList, 0, newFilterList, 0, filterList.length);
   

   then applies the edittext / textview the new filters.

6. USING SELECT COUNT(WHEN ..’CLAUSE’.. THEN 1 END) If you wanted to search by criteria. https://stackoverflow.com/questions/6350154/selecting-count-from-different-criteria-on-a-table

7. Converting Excel Into CSV MYSQL

https://lenashore.com/2012/04/how-to-add-quotes-to-your-cells-in-excel-automatically/

Let’s assume you have added quotes to each of your cells

Copy paste to notepad

Replace the spaces as with semicolon

save as .csv

there you go

1. Regarding Intent, TOP means foreground, (Current displayed Activity) Developer.Android states that the TOP intent may have more than one Activity.

https://stackoverflow.com/questions/8076939/what-is-the-difference-between-intent-flag-activity-clear-top-and-finish-in-andr

1. You cannot run delayed functions (timer/postdelayed) in the background thread.

2. If conflicts come out between androidx and appcompat, consider checking gradle.properties

   android.useAndroidX = true
   android.enableJetifier=true

3. Set Default Locale https://stackoverflow.com/a/61572489

   @Override
   protected void attachBaseContext(Context newBase) {
       Context newContext = updateBaseContextLocale(newBase);
       super.attachBaseContext(newContext);
       applyOverrideConfiguration(newContext.getResources().getConfiguration());
   }
   
   
   private Context updateBaseContextLocale(Context context) {
       Locale locale = new Locale("id");
       Locale.setDefault(locale);
       return updateResourcesLocale(context, locale);
   }
   
   private Context updateResourcesLocale(Context context, Locale locale) {
       Configuration configuration = context.getResources().getConfiguration();
       configuration.setLocale(locale);
       return context.createConfigurationContext(configuration);
   }
   

4. Handle When a view is at the bottom of a viewpager ```xml

22. When you put CoordinatorLayout, attribute app:layout_scrollFlags="scroll|enterAlwaysCollapsed" makes the layout collapsed and scroll slightly to the bottom,
you want your layout scroll to the top first.
```xml
    <com.google.android.material.appbar.CollapsingToolbarLayout
            android:id="@+id/layout_toolbar_collapsing"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_scrollFlags="scroll|enterAlwaysCollapsed"
            >
            
          
            ...
            
    </com.google.android.material.appbar.CollapsingToolbarLayout

layout_toolbar_collapsing.scrollTo(0, view.bottom) //or 0

add margin Top to the size of  toolbar height. =>
```xml
    <androidx.coordinatorlayout.widget.CoordinatorLayout
     android:fitsSystemWindows="true"
     android:background="@drawable/green"
     android:fitsSystemWindows="true">
      <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/layout_appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">    
           <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:textAppearance="@style/ToolbarStyle"
            android:textColor="@color/White"
            app:layout_scrollFlags="scroll|enterAlwaysCollapsed"
            />

        <com.google.android.material.appbar.CollapsingToolbarLayout
            android:id="@+id/layout_toolbar_collapsing"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"
            app:layout_scrollFlags="scroll|enterAlwaysCollapsed">
            
            <!-- or ConstraintLayout -->
            <LinearLayout
                    android:id="@+id/layout_desc_header"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="?attr/actionBarSize"
                    android:background="@drawable/bg_stroke_rounded_corner"
                    android:orientation="vertical"
                    app:layout_behavior="@string/appbar_scrolling_view_behavior"
                    android:padding="@dimen/padding_small">
                    
                ,,,,contents
                
            </LinearLayout>
            
            
         </com.google.android.material.appbar.CollapsingToolbarLayout>
      </com.google.android.material.appbar.AppBarLayout>
        ...body contents..
       
    </androidx.coordinatorlayout.widget.CoordinatorLayout>