Pupli – Page 154

React State of Components

March 19, 2017

/components/Home.tsx

import * as React from 'react'
export interface HomeProps {
    number?: number
}

export interface HomeState {
    number: number
}

export class Home extends React.Component<HomeProps,HomeState> {

    constructor(props: HomeProps) {
        super();
        this.state = {
            number: props.number
        };
    }

    public static defaultProps: Partial<HomeProps> = {
        number: 0
    };

    increaseNumber() {
        let newNumber: number;
        newNumber = this.state.number + 1;

        this.setState({
            number: newNumber
        });
    }

    render(): JSX.Element {
        return (
            <div>
                <p>Count : {this.state.number}</p>
                <button className="btn btn-primary" onClick={()=>{this.increaseNumber()}}>Increase Number</button>
            </div>
        );
    }
}

App.tsx

import * as React from 'react'
import {Home} from "./components/Home"

export interface AppProps { }


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

export default App;

References
https://github.com/mhdr/ReactJSSamples/tree/master/007

Android Working with Thread

March 19, 2017

MainActivity.java

public class MainActivity extends AppCompatActivity {

    Button buttonProgress;

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

        buttonProgress= (Button) findViewById(R.id.buttonProgress);

        buttonProgress.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                final ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
                progressDialog.setTitle("Progress ...");
                progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                progressDialog.setMax(100);
                progressDialog.setProgress(0);
                progressDialog.show();

                final Thread thread=new Thread(new Runnable() {
                    @Override
                    public void run() {

                        synchronized (this)
                        {
                            int i = 0;

                            while (i < 101) {

                                progressDialog.setProgress(i);

                                try {
                                    wait(100);
                                } catch (InterruptedException e) {
                                    e.printStackTrace();
                                }

                                i++;
                            }

                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    progressDialog.hide();
                                }
                            });
                        }
                    }
                });

                thread.start();
            }
        });
    }
}

References
https://github.com/mhdr/AndroidSamples/tree/master/052

Android Progress Bar using ProgressDialog

March 19, 2017

MainActivity.java

public class MainActivity extends AppCompatActivity {

    Button buttonProgress1;
    Button buttonProgress2;
    Button buttonProgress3;

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

        buttonProgress1 = (Button) findViewById(R.id.buttonProgress1);
        buttonProgress2 = (Button) findViewById(R.id.buttonProgress2);
        buttonProgress3 = (Button) findViewById(R.id.buttonProgress3);

        buttonProgress1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                final ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
                progressDialog.setTitle("Progress 1 ...");
                progressDialog.setMax(100);
                progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                progressDialog.setProgress(0);
                progressDialog.show();

                final Thread thread = new Thread(new Runnable() {
                    @Override
                    public void run() {

                        synchronized (this) {
                            int i = 0;

                            while (i < 101) {

                                progressDialog.setProgress(i);

                                try {
                                    wait(100);
                                } catch (InterruptedException e) {
                                    e.printStackTrace();
                                }

                                i++;
                            }

                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    progressDialog.hide();
                                }
                            });
                        }
                    }
                });

                thread.start();
            }
        });


        buttonProgress2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                final ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
                progressDialog.setTitle("Progress 2 ...");
                progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                progressDialog.setIndeterminate(true);
                progressDialog.setMax(100);
                progressDialog.setProgress(0);
                progressDialog.show();

                final Thread thread = new Thread(new Runnable() {
                    @Override
                    public void run() {

                        synchronized (this) {
                            int i = 0;

                            while (i < 101) {

                                progressDialog.setProgress(i);

                                try {
                                    wait(100);
                                } catch (InterruptedException e) {
                                    e.printStackTrace();
                                }

                                i++;
                            }

                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    progressDialog.hide();
                                }
                            });
                        }
                    }
                });

                thread.start();
            }
        });


        buttonProgress3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                final ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
                progressDialog.setTitle("Progress 3 ...");
                //progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
                progressDialog.setMax(100);
                progressDialog.setProgress(0);
                progressDialog.show();

                final Thread thread = new Thread(new Runnable() {
                    @Override
                    public void run() {

                        synchronized (this) {
                            int i = 0;

                            while (i < 101) {

                                progressDialog.setProgress(i);

                                try {
                                    wait(100);
                                } catch (InterruptedException e) {
                                    e.printStackTrace();
                                }

                                i++;
                            }

                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    progressDialog.hide();
                                }
                            });
                        }
                    }
                });

                thread.start();
            }
        });
    }
}

References
https://github.com/mhdr/AndroidSamples/tree/master/051
https://developer.android.com/reference/android/widget/ProgressBar.html

Android AsyncTask

March 19, 2017

MyTask.java

public class MyTask extends AsyncTask<Void,Integer,String> {

    private Context context;
    private Button buttonDownload;
    private TextView textViewDownload;

    ProgressDialog progressDialog;

    public void setButtonDownload(Button button)
    {
        this.buttonDownload=button;
    }

    public void setTextViewDownload(TextView textView)
    {
        this.textViewDownload=textView;
    }

    public MyTask(Context context)
    {
        this.context=context;
    }

    @Override
    protected String doInBackground(Void... params) {

        int i=0;

        synchronized (this)
        {
            while (i<101)
            {
                try {
                    wait(100);
                    i++;
                    this.publishProgress(i);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }


        return "Download Completed.";
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();

        buttonDownload.setEnabled(false);
        textViewDownload.setText("Downloading...");

        progressDialog=new ProgressDialog(context);
        progressDialog.setTitle("Downloading ....");
        progressDialog.setMax(100);
        progressDialog.setProgress(0);
        progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        progressDialog.show();
    }

    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);

        textViewDownload.setText(s);
        buttonDownload.setEnabled(true);
        progressDialog.hide();
    }

    @Override
    protected void onProgressUpdate(Integer... values) {
        super.onProgressUpdate(values);

        Integer progress=values[0];
        progressDialog.setProgress(progress);
    }

    @Override
    protected void onCancelled(String s) {
        super.onCancelled(s);

        if (s.isEmpty())
        {
            textViewDownload.setText("Download Canceled.");
        }
    }
}

MainActivity.java

public class MainActivity extends AppCompatActivity {

    TextView textViewDownload;
    Button buttonDownload;

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

        textViewDownload= (TextView) findViewById(R.id.textViewDownload);
        buttonDownload= (Button) findViewById(R.id.buttonDownload);

        buttonDownload.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                MyTask myTask=new MyTask(MainActivity.this);
                myTask.setButtonDownload(buttonDownload);
                myTask.setTextViewDownload(textViewDownload);
                myTask.execute();
            }
        });
    }
}

References
https://github.com/mhdr/AndroidSamples/tree/master/050

Android Working with ScrollView

March 19, 2017

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView 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.a049.MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingTop="10dp"
        android:paddingBottom="10dp">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Text 1"
            android:textAppearance="@style/TextAppearance.AppCompat.Large"
            android:paddingTop="10dp"
            android:paddingBottom="10dp"/>


        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Text 2"
            android:textAppearance="@style/TextAppearance.AppCompat.Large"
            android:paddingTop="10dp"
            android:paddingBottom="10dp"/>


        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Text 3"
            android:textAppearance="@style/TextAppearance.AppCompat.Large"
            android:paddingTop="10dp"
            android:paddingBottom="10dp"/>

    </LinearLayout>

</ScrollView>

References
https://github.com/mhdr/AndroidSamples/tree/master/049

React Events

March 18, 2017

/components/CustomButton.tsx

import * as React from 'react'
import "./CustomButton.css"

 
export interface CustomButtonProps { number: number
}

export class CustomButton extends React.Component<CustomButtonProps,undefined> {

    private number: number;

    constructor(props:CustomButtonProps) {
        super();
        this.number = props.number;
    }

    public increaseNumber()
    {
        this.number +=1;
        console.log(this.number);
    }

    render() {
        return (
            <div>
                <button className="btn btn-primary bold" onClick={this.increaseNumber.bind(this)}>Increase Number</button>
            </div>
        );
    }
}

App.tsx

import * as React from 'react'
export interface AppProps { }
import {CustomButton} from "./components/CustomButton"

export default class App extends React.Component<AppProps,undefined> {
    render() {
        return (
            <div>
                <CustomButton number={10} />
            </div>
        );
    }
}

References
https://github.com/mhdr/ReactJSSamples/tree/master/006

npm usefull global packages

March 18, 2017

https://www.npmjs.com/package/node-sass
https://www.npmjs.com/package/csso
https://www.npmjs.com/package/uglify-js
https://www.npmjs.com/package/typescript

Install React Bootstrap

March 18, 2017

npm install --save react react-dom @types/react @types/react-dom

npm install --save react-bootstrap @types/react-bootstrap

References
https://react-bootstrap.github.io/getting-started.html

Android Navigating between Menu Items of Navigation Drawer

March 17, 2017

/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

March 16, 2017

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/