Android编程示例：创建机场计划模拟器应用程序

public void setupsearchablewithbutton() {

    // set background color of the search view
    ((viewgroup)m_searchview.findviewbyid(android.support.v7.appcompat.r.id.search_mag_icon).
            getparent()).setbackgroundcolor(color.parsecolor("#ffffff"));


    // set default custom search of the search view button icon and look of the custom search view
    this.setdefaultsearchicon(); this.setupiconifiedbydefault();

    // set default search hint displayed in the search view's edit text view
    m_searchview.setqueryhint("type here...");

    // set default query text and remove focus from the search view
    m_searchview.setquery("", false); getrootview().requestfocus();

    // instantinate the search view object and set default action button click event listener
    m_searchview.findviewbyid(android.support.v7.appcompat.r.id.search_mag_icon).
            setonclicklistener(new searchableviewlistener());

    // instantinate the search view object
    viewgroup llsearchview = ((viewgroup)m_searchview.findviewbyid(
            android.support.v7.appcompat.r.id.search_mag_icon).getparent());

    // instantinate object of the text editable inside the search view
    edittext searchedittext = llsearchview.findviewbyid(
            android.support.v7.appcompat.r.id.search_src_text);

    // remove the search view text editable default selection
    searchedittext.setselected(false);

    // set text editable click event listener
    searchedittext.setonclicklistener(new searchableviewlistener());

    // set text editable ontextchange listener
    searchedittext.addtextchangedlistener(new searchableviewlistener());
}

public class searchableviewlistener
            implements onclicklistener, textwatcher {
        @override
        public void onclick(view view) {

            // check if the custom search view button was clicked
            if (android.support.v7.appcompat.r.
                    id.search_mag_icon == view.getid()) {

                // if so, perform a check if the default action bar icon was set
                if (!isdefaulticon) {

                    // if not, set the default icon by invoking setdefaultsearchicon() method
                    setdefaultsearchicon();

                    // terminate the onclick handler method execution
                    return;
                }


                // invoke onclick(...) method from the main app's activity class
                m_clicklistener.onclick(view);
            }

            // otherwise, set navigation-back search icon
            else setnavbacksearchicon();
        }

        @override
        public void beforetextchanged(charsequence charsequence, int i, int i1, int i2) {

            // invoke the beforetextchange(...) method from app's activity class (e.g. its parent)
            m_textwatcherlistener.beforetextchanged(charsequence, i, i1, i2);
        }

        @override
        public void ontextchanged(charsequence charsequence, int i, int i1, int i2) {
<span segoe ui",arial,sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-shadow: none; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;">                     // set navigation-back icon and invoke the ontextchanged(...) method </span>
            <span segoe ui",arial,sans-serif; font-size: 14px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-shadow: none; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;">// from app's activity class (e.g. its parent)</span>
            setnavbacksearchicon(); m_textwatcherlistener.ontextchanged(charsequence, i, i1, i2);
        }

        @override
        public void aftertextchanged(editable editable) {

            // perform a check if the editable string is empty
            if (editable.tostring().isempty())

                // if so, set default search view icon
                setdefaultsearchicon();

            // invoke the aftertextchanged(...) method from its parent 
            m_textwatcherlistener.aftertextchanged(editable);
        }
    }

private void setupiconifiedbydefault() {
     // disable the iconfied mode to make the search view fill the entire area horizontally
     m_searchview.seticonified(false);
     m_searchview.seticonifiedbydefault(false);
 }

private void setdefaultsearchicon() {
    // replace the default search view icon with the action button icon
    this.isdefaulticon = true;
    this.replacesearchicon(r.drawable.ic_dehaze_white_24dp);
}

private void setnavbacksearchicon() {
    // check if the default icon was set
    if (this.isdefaulticon == true) {
        // if so, replace search view icon with navigation-back icon
        this.isdefaulticon = false;
        this.replacesearchicon(r.drawable.ic_arrow_back_black_24dp);
        // run the search view icon animation
        this.setupanimation();
    }
}

private void replacesearchicon(int resdefaulticon) {
    // instantinate search view button icon object and set the custom icon
    // by calling setimagedrawable method that accepts the icon object retrieved
    // from the app's resources by calling the context's getdrawable(...) method
    ((imageview)m_searchview.findviewbyid(android.support.v7.appcompat.r.id.search_mag_icon)).
            setimagedrawable(m_context.getdrawable(resdefaulticon));
    // start animating icon
    this.setupanimation();
}

private void setupanimation() {

    // instantinate search view icon object
    final imageview searchiconview = m_searchview.findviewbyid(
            android.support.v7.appcompat.r.id.search_mag_icon);

    // compute the icon's width and height values
    int searchiconwidth = searchiconview.getwidth();
    int searchiconheight = searchiconview.getheight();

    // instantinate rotateanimation class object and specify the rotation params
    rotateanimation searchiconanimation = new rotateanimation(0f, 360f,
            searchiconwidth / 2, searchiconheight / 2);
    // set animation interpolator
    searchiconanimation.setinterpolator(new linearinterpolator());
    // set animation repeat count
    searchiconanimation.setrepeatcount(animation.infinite);
    // set animation duration
    searchiconanimation.setduration(700);

    // start animating the icon
    searchiconview.startanimation(searchiconanimation);

    // perform a delay for 700ms after the icon animation ends
    new handler().postdelayed(new runnable() {
        @override
        public void run() {
            searchiconview.setanimation(null);
        }
    }, 700);

}

// override the default findviewbyid method to be used to instantinate
// search view object
private searchview findsearchviewbyid(int resid) {
    return ((activity)m_context).findviewbyid(resid);
}

public void setsearchbuttonclicklistener(@nullable onclicklistener clicklistener) {
    // set click listener class object of its parent
    m_clicklistener = clicklistener;
}
public void settextwatchlistener(@nullable textwatcher textwatchlistener) {
    // set text change watcher listener class object of its parent
    m_textwatcherlistener = textwatchlistener;
}

@override
protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_airport);

    // instantinating the drawer layout object
    m_drawerlayout = findviewbyid(r.id.airport_drawer_layout);
    // instantinating the navigation view object
    m_navigationview = findviewbyid(r.id.airport_navigation_view);

    // instantinating our custom search view object
    m_searchablewithbuttonview =
            new searchablewithbuttonview(airportactivity.this, r.id.searchable);

    // setting up our custom search view
    m_searchablewithbuttonview.setupsearchablewithbutton();
    // adding the text change watcher listener
    m_searchablewithbuttonview.settextwatchlistener(new searchablewithbuttonlistener());
    // adding the search view action button click event listener
    m_searchablewithbuttonview.setsearchbuttonclicklistener(new searchablewithbuttonlistener());

    // setup app's drawer menu click event listener
    m_navigationview.setnavigationitemselectedlistener(m_navigationbarlistener);

    // ...

public class searchablewithbuttonlistener implements view.onclicklistener, textwatcher
    {
        @override
        public void beforetextchanged(charsequence charsequence, int i, int i1, int i2) {
        }

        @override
        public void ontextchanged(charsequence charsequence, int i, int i1, int i2) {
        }

        @override
        public void aftertextchanged(editable editable) {

        }

        @override
        public void onclick(view view) {
            // perform a check if the app's drawer open
            if (!m_drawerlayout.isdraweropen(gravitycompat.start))
                // if not, open the app's drawer
                m_drawerlayout.opendrawer(gravitycompat.start);
        }
    }

private class navigationbarlistener implements
        navigationview.onnavigationitemselectedlistener
{
    // this method handles the navigation menu item click events
    public boolean onnavigationitemselected(menuitem menuitem) {
        // set item as selected to persist highlight
        menuitem.setchecked(true);

        //...

        if (m_drawerlayout.isdraweropen(gravitycompat.start))
            m_drawerlayout.closedrawers();

        return true;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:id="@+id/flights_fragment"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    tools:context=".flightsfragment">

    <android.support.design.widget.tablayout

        android:id="@+id/flights_destination_tabs"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        app:tabmaxwidth="0dp"

        app:tabmode="fixed"

        app:tabgravity="fill">

    <android.support.design.widget.tabitem

        android:id="@+id/arrivals_tab"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:icon="@drawable/ic_flight_land_black_24dp"

        android:text="@string/arrivals_tab" />

    <android.support.design.widget.tabitem

        android:id="@+id/departures_tab"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:icon="@drawable/ic_flight_takeoff_black_24dp"

        android:text="@string/departures_tab" />

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

    <android.support.v4.view.viewpager

        android:id="@+id/flights_destination_pager"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"/>

    <requestfocus/>
</linearlayout>

package com.epsilon.arthurvratz.airportapp;

import android.content.context;
import android.net.uri;
import android.os.bundle;
import android.support.design.widget.tablayout;
import android.support.v4.view.viewpager;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;

public class flightsfragment extends flightsfragmentimpl
{
    private tablayout m_tablayout;
    private viewpager m_viewpager;

    final private tabselectedlistener
            m_tabsellistener = new tabselectedlistener();

    public arrivalsfragment m_arrivalsfragment;
    public departuresfragment m_departuresfragment;

    private class tabselectedlistener implements tablayout.ontabselectedlistener
    {
        @override
        public void ontabselected(tablayout.tab tab) {
            m_viewpager.setcurrentitem(tab.getposition());
        }

        @override
        public void ontabunselected(tablayout.tab tab) {

        }

        @override
        public void ontabreselected(tablayout.tab tab) {

        }
    }

    private onfragmentinteractionlistener mlistener;

    public flightsfragment() {
        // required empty public constructor
    }

    public static flightsfragment newinstance() {
        return new flightsfragment();
    }

    @override
    public void oncreate(bundle savedinstancestate) {
        super.oncreate(savedinstancestate);
    }

    @override
    public view oncreateview(layoutinflater inflater, viewgroup container,
                bundle savedinstancestate) {

        // inflating the flights fragment view's object
        view flightsfragmentview =
                    inflater.inflate(r.layout.fragment_flights, container, false);

        // instantinating the tab layout object
        m_tablayout = flightsfragmentview.findviewbyid(r.id.flights_destination_tabs);

        // instantinating view pager object
        m_viewpager = flightsfragmentview.findviewbyid(r.id.flights_destination_pager);

        // instantinating the tab layout's pager adapter
        flightsdestpageradapter pageradapter = new flightsdestpageradapter(
              getchildfragmentmanager(), m_tablayout.gettabcount());

        // instantinating the arrivals fragment object
        m_arrivalsfragment = arrivalsfragment.newinstance();

        // instantinating the departures fragment object 
        m_departuresfragment = departuresfragment.newinstance();

        // adding the arrivals and departure fragment objects to the view pager adapter
        pageradapter.add(m_arrivalsfragment);
        pageradapter.add(m_departuresfragment);

        // setting up the view pager adapter
        m_viewpager.setadapter(pageradapter);

        // adding the generic page sliding event listener
        m_viewpager.addonpagechangelistener(
                new tablayout.tablayoutonpagechangelistener(m_tablayout));
        m_tablayout.addontabselectedlistener(m_tabsellistener);

        return flightsfragmentview;
    }

    public void onbuttonpressed(uri uri) {
        if (mlistener != null) {
            mlistener.onfragmentinteraction(uri);
        }
    }

    @override
    public void onattach(context context) {
        super.onattach(context);
        if (context instanceof onfragmentinteractionlistener) {
            mlistener = (onfragmentinteractionlistener) context;
        } else {
            throw new runtimeexception(context.tostring()
                    + " must implement onfragmentinteractionlistener");
        }
    }

    @override
    public void ondetach() {
        super.ondetach();
        mlistener = null;
    }

    @override
    public void onfragmentinteraction(uri uri) {

    }

    public interface onfragmentinteractionlistener {
        // todo: update argument type and name
        void onfragmentinteraction(uri uri);
    }
}