Month: March 2017

Android Navigating between Menu Items of Navigation Drawer

/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="iterator.ir.a048.MainActivity"
    android:id="@+id/drawerLayout">

    <!--Content-->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <include
            layout="@layout/toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />


        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/main_container">

        </FrameLayout>
    </LinearLayout>

    <!--Drawer-->
    <android.support.design.widget.NavigationView
        android:id="@+id/navigationView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:menu="@menu/drawer_menu">

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

</android.support.v4.widget.DrawerLayout>

MainActivity.java

public class MainActivity extends AppCompatActivity {

    Toolbar toolbar;

    FragmentTransaction fragmentTransaction;
    NavigationView navigationView;
    DrawerLayout drawerLayout;

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

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

        // load at application start up
        fragmentTransaction=getSupportFragmentManager().beginTransaction();
        fragmentTransaction.add(R.id.main_container,new HomeFragment());
        fragmentTransaction.commit();

        getSupportActionBar().setTitle("Home");

        navigationView= (NavigationView) findViewById(R.id.navigationView);
        drawerLayout= (DrawerLayout) findViewById(R.id.drawerLayout);

        // handle navigation menu item click event
        navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {

                switch (item.getItemId())
                {
                    case R.id.itemHome:
                        fragmentTransaction=getSupportFragmentManager().beginTransaction();
                        fragmentTransaction.replace(R.id.main_container,new HomeFragment());
                        fragmentTransaction.commit();

                        item.setChecked(true);
                        drawerLayout.closeDrawers();

                        return true;

                    case R.id.itemAdd:
                        fragmentTransaction=getSupportFragmentManager().beginTransaction();
                        fragmentTransaction.replace(R.id.main_container,new AddFragment());
                        fragmentTransaction.commit();

                        item.setChecked(true);
                        drawerLayout.closeDrawers();

                        return true;
                }

                return false;
            }
        });
    }
}

References
https://github.com/mhdr/AndroidSamples/tree/master/048
https://www.youtube.com/watch?v=o4gF75f4BoI&index=78&list=PLshdtb5UWjSp0879mLeCsDQN6L73XBZTk

Android Add Hamburger icon for Navigation Drawer

MainActivity.java

public class MainActivity extends AppCompatActivity {


    DrawerLayout drawerLayout;
    Toolbar toolbar;
    ActionBarDrawerToggle actionBarDrawerToggle;

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

        drawerLayout= (DrawerLayout) findViewById(R.id.drawer_layout);
        toolbar= (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        actionBarDrawerToggle=new ActionBarDrawerToggle(this,drawerLayout, R.string.drawer_open, R.string.drawer_close);

        drawerLayout.addDrawerListener(actionBarDrawerToggle);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);
    }

    @Override
    protected void onPostCreate(@Nullable Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        actionBarDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        actionBarDrawerToggle.onConfigurationChanged(newConfig);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        if (actionBarDrawerToggle.onOptionsItemSelected(item))
        {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

References
https://github.com/mhdr/AndroidSamples/tree/master/047
https://www.youtube.com/watch?v=dvYGgSxiR1c&index=77&list=PLshdtb5UWjSp0879mLeCsDQN6L73XBZTk
https://developer.android.com/training/implementing-navigation/nav-drawer.html
http://codetheory.in/android-navigation-drawer/

React Passing Data with Props

/components/Header.js

import React, {Component} from 'react';
import "./Header.css"

export class Header extends Component {

    render() {

        var classNames = "";

        if (this.props.isBold) {
            classNames += " bold";
        }

        return (
            <div className={classNames}>
                App
            </div>
        );
    }
}

Header.propTypes = {
    isBold: React.PropTypes.bool
};

/components/Content.js

import React, {Component} from 'react';
import "./Content.css"

export class Content extends Component {

    render() {

        var classNames = "";

        if (this.props.size === "small") {
            classNames += " small";
        }
        else if (this.props.size === "medium") {
            classNames += " medium";
        }
        else if (this.props.size === "large") {
            classNames += " large";
        }

        return (
            <div className={classNames}>
                {this.props.children}
            </div>
        );
    }
}

Content.propTypes = {
    size: React.PropTypes.string,
    children: React.PropTypes.array
};

App.js

import React, { Component } from 'react';
import {Header} from "./components/Header"
import {Content} from "./components/Content"


export default class App extends Component {
  render() {
    return (
      <div>
        <Header isBold={true} />
        <Content size={"large"}>
          Hello <i>World</i>
        </Content>
      </div>
    );
  }
}

References
https://github.com/mhdr/ReactJSSamples/tree/master/005

ReactJS Outputting Dynamic Data

App.tsx

import * as React from 'react'
export interface AppProps { compiler: string; framework: string;
}

class App extends React.Component<AppProps,undefined> {
    render() {

        let number2 = 17;
        let number3: any = "";
        let n4 = 5;
        let n5 = 2;

        if (true) {
            number2 = 34 + 198;
            number2 = number2 / 2;

            number3 =<i>19</i>
        }

        return (
            <div>
                <p>
                    <b>Number :</b> {2 + 4}
                </p>

                <p>
                    <b>Number 2 :</b> {number2}
                </p>

                <p>
                    <b>Number 3 :</b> {number3}
                </p>

                <p>
                    <b>Number 4 :</b> { n4 === n5 ? 18 : 19}
                </p>
            </div>
        );
    }
}

export default App;

References
https://github.com/mhdr/ReactJSSamples/tree/master/004

Configure React with TypeScript

create-react-app hello-world
npm install --save react react-dom @types/react @types/react-dom

npm install --save-dev typescript awesome-typescript-loader source-map-loader

tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es5",
    "sourceMap": true,
    "jsx": "preserve",
    "noImplicitAny": true,
    "noImplicitUseStrict":true,
    "declaration":true,
    "removeComments":true
  },
  "exclude": [
    "node_modules"
  ]
}

App.tsx

import * as React from 'react'
export interface AppProps { compiler: string; framework: string; }

class App extends React.Component<AppProps,undefined> {
    render() {
        return (
            <div>
                Hello World
            </div>
        );
    }
}

export default App;

References
https://github.com/mhdr/ReactJSSamples/tree/master/003

ReactJS Multiple Components

/components/Header.js

import React, { Component } from 'react';

class Header extends Component {
    render() {
        return (
            <div>
                <h1>Header</h1>
            </div>
        );
    }
}

export default Header;

/components/Content.js

import React, { Component } from 'react';

class Content extends Component {
    render() {
        return (
            <div>
                <p>Content</p>
            </div>
        );
    }
}

export default Content;

App.js

import React, { Component } from 'react';
import Header from "./components/Header"
import Content from "./components/Content"

class App extends Component {
  render() {
    return (
      <div>
        <Header/>
        <Content/>
      </div>
    );
  }
}

export default App;

References
https://github.com/mhdr/ReactJSSamples/tree/master/002

Android Add Header for Navigation Drawer

/res/layout/navigation_drawer_header.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@android:color/holo_green_light">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="70dp"
        android:paddingBottom="70dp"
        android:text="Header"
        android:gravity="center"/>

</RelativeLayout>

/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="iterator.ir.a046.MainActivity">

    <!--Content-->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <include
            layout="@layout/toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>

    <!--Drawer-->
    <android.support.design.widget.NavigationView
        android:id="@+id/navigationView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/navigation_drawer_header"
        app:menu="@menu/drawer_menu">

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

</android.support.v4.widget.DrawerLayout>

References
https://github.com/mhdr/AndroidSamples/tree/master/046
https://www.youtube.com/watch?v=dvYGgSxiR1c&t=58s&index=77&list=PLshdtb5UWjSp0879mLeCsDQN6L73XBZTk