React Native : WebView Resizing by Content

JavaScript : Tour of heroes using React and Redux

JavaScript : Tour of heroes using Vue.js

Golang : 學習 Go Programming Language - 費氏數列

Android : Trying Kotlin programming language

PostgreSQL : 如何將 JSON 資料匯入 TABLE ROW

JavaScript : Tour of heroes using AngularJS 1.x

PostgreSQL : 試試 JSON 函數

insert into members (name, gender, blood, age)
select j1.key "name", j1.value "gender", j2.value "blood", j3.value "age"
from json_each_text('{"Chris":"Male", "Kelly":"Female"}') as j1
join json_each_text('{"Chris":"A", "Kelly":"O"}') as j2 on j2.key = j1.key
join json_each_text('{"Chris":"42", "Kelly":"34"}') as j3 on j3.key = j1.key

"Chris";"Male";"A";"42"
"Kelly";"Female";"O";"34"

JSON Functions and Operators

Android : 試試 Android Wear App 開發

JavaScript : d3.js tooltip

JavaScript : d3.js dynamically change the tree layout size

Android : SwipeRefreshLayout + RecyclerView + CardView

dependencies:

compile 'com.android.support:cardview-v7:25.1.0'

compile 'com.android.support:recyclerview-v7:25.1.0'

Android : 自訂 Spinner 下拉式選單様式

spinner_dropdown.java

......

final String[] items = new String[] {"1","2","3","4","5"};

ArrayAdapter adapter = new ArrayAdapter<>(view.getContext(), R.layout.spinner_dropdown_title, items);
adapter.setDropDownViewResource(R.layout.spinner_dropdown_item);
mSpinner.setAdapter(adapter);
mSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView parent, View view, int position, long id) {
        Toast.makeText(getActivity(), "Item selected " + items[position] , Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onNothingSelected(AdapterView parent) {

    }
});

......

spinner_dropdown_title.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    style="?android:attr/spinnerDropDownItemStyle"
    android:maxLines="1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ellipsize="marquee"
    android:textColor="@color/colorDark87"/>

spinner_dropdown_item.xml

<?xml version="1.0" encoding="utf-8"?>
<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:maxLines="1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ellipsize="marquee"
    android:paddingTop="@dimen/dimen8dp"
    android:paddingRight="@dimen/dimen16dp"
    android:paddingBottom="@dimen/dimen8dp"
    android:paddingLeft="@dimen/dimen16dp"
    android:textColor="@color/colorDark87"/>

Android : TabLayout + ViewPager 實做滑動標籤效果

activity_main.html

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="marxtseng.a1know.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|enterAlways"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
        <android.support.design.widget.TabLayout
            android:id="@+id/tabLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        TabLayout tabLayout = (TabLayout) findViewById(R.id.tabLayout);
        tabLayout.addTab(tabLayout.newTab().setText(R.string.course));
        tabLayout.addTab(tabLayout.newTab().setText(R.string.task));
        tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

        final PageAdapter adapter = new PageAdapter(getSupportFragmentManager(), tabLayout.getTabCount());
        final ViewPager viewPager = (ViewPager) findViewById(R.id.viewPager);
        viewPager.setAdapter(adapter);
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
        tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });
    }
}

PageAdapter.java

public class PageAdapter extends FragmentStatePagerAdapter {

    private int mNumOfTabs;

    public PageAdapter(FragmentManager fm, int numOfTabs) {
        super(fm);
        this.mNumOfTabs = numOfTabs;
    }

    @Override
    public Fragment getItem(int position) {

        switch (position) {
            case 0:
                CourseFragment courseFragment = new CourseFragment();
                return courseFragment;
            case 1:
                TaskFragment taskFragment = new TaskFragment();
                return taskFragment;
            default:
                return null;
        }
    }

    @Override
    public int getCount() {
        return mNumOfTabs;
    }
}

JavaScript : Tour of heroes using CustomElements and Redux

JavaScript : Tour of heroes using Polymer and Redux

JavaScript : SkateJS Demo