オーディオを再生する

Posted on 8月 04, 2026 by

カードをクリックしてオーディオを再生します。

まずMP3オーディオファイルをwww/audioディレクトリに配置してください。

これはデモプロジェクトなので、b.mp3をこのディレクトリに置くだけで動作します。

方法1‑HTML5再生

WebViewが対応するHTML5 Audioでオーディオを再生、プラグインは不要です。

main.jsを下記の内容に書き換えます。

// ベトナム語子音データ
const consonants = [
    {char: "b", pronounce: "/ɓ/", desc: "両唇入破音"},
    {char: "c", pronounce: "/k/", desc: "硬口蓋破裂音"},
    {char: "ch", pronounce: "/tɕ/", desc: "口蓋破擦音"},
    {char: "d", pronounce: "/ɗ/", desc: "歯茎入破音"},
    {char: "đ", pronounce: "/ɗ/", desc: "歯蓋有声音"},
    {char: "g", pronounce: "/ɣ/", desc: "口蓋摩擦音"},
    {char: "gh", pronounce: "/ɣ/", desc: "e、iの前で使用"},
    {char: "h", pronounce: "/h/", desc: "声門摩擦音"},
    {char: "k", pronounce: "/k/", desc: "硬口蓋無声破裂音"},
    {char: "kh", pronounce: "/x/", desc: "硬口蓋摩擦音"},
    {char: "l", pronounce: "/l/", desc: "歯茎側面音"},
    {char: "m", pronounce: "/m/", desc: "両唇鼻音"},
    {char: "n", pronounce: "/n/", desc: "歯茎鼻音"},
    {char: "ng", pronounce: "/ŋ/", desc: "軟口蓋鼻音"},
    {char: "ngh", pronounce: "/ŋ/", desc: "e,iの前で使用"},
    {char: "nh", pronounce: "/ɲ/", desc: "口蓋鼻音"},
    {char: "p", pronounce: "/p/", desc: "無気味両唇破裂音"},
    {char: "ph", pronounce: "/f/", desc: "唇歯摩擦音"},
    {char: "q", pronounce: "/kw/", desc: "常にuと組み合わせ"},
    {char: "r", pronounce: "/r/", desc: "歯茎ふるえ音"},
    {char: "s", pronounce: "/s/", desc: "歯茎摩擦音"},
    {char: "t", pronounce: "/t/", desc: "歯茎破裂音"},
    {char: "th", pronounce: "/θ/", desc: "歯摩擦音"},
    {char: "v", pronounce: "/v/", desc: "唇歯有声音摩擦音"},
    {char: "x", pronounce: "/s/", desc: "歯茎摩擦音"}
];

let favList = JSON.parse(localStorage.getItem("vn_consonant_fav")) || [];
let currentAudio = null; // グローバルオーディオオブジェクト、前の再生を停止用

const gridEl = document.getElementById("consonant-grid");
const favGridEl = document.getElementById("favorite-grid");
const modal = document.getElementById("modal");
const modalChar = document.getElementById("modal-char");
const modalPro = document.getElementById("modal-pronounce");
const modalDesc = document.getElementById("modal-desc");
const btnFav = document.getElementById("btn-fav");
const closeModal = document.getElementById("close-modal");

let currentItem = null;

// ====================== MP3再生関数 ======================
function playAudio(charName) {
    // 再生中の音声を停止
    if(currentAudio){
        currentAudio.pause();
        currentAudio.currentTime = 0;
    }
    // オーディオを作成
    currentAudio = new Audio(`audio/${charName}.mp3`);
    currentAudio.volume = 1;
    currentAudio.play().catch(err=>{
        console.log("ファイル再生失敗: ", charName, err);
        alert(`オーディオファイルが見つかりません: ${charName}.mp3`);
    });
}

// 子音カード描画
function renderCards(){
    gridEl.innerHTML = "";
    consonants.forEach(item=>{
        const div = document.createElement("div");
        div.className = "bg-cardBg rounded-lg py-5 text-center card-shadow active:scale-95 transition-transform cursor-pointer";
        div.innerHTML = `<span class="text-2xl font-bold text-gray-800">${item.char}</span>`;
        div.onclick = ()=> {
            playAudio(item.char); // カードクリックでMP3再生
            openModal(item);
        };
        gridEl.appendChild(div);
    })
}

// お気に入りページ描画
function renderFav(){
    favGridEl.innerHTML = "";
    if(favList.length === 0){
        favGridEl.innerHTML = `<p class="col-span-3 text-center text-gray-400 py-10">お気に入りはまだありません</p>`;
        return;
    }
    favList.forEach(item=>{
        const div = document.createElement("div");
        div.className = "bg-cardBg rounded-lg py-5 text-center card-shadow active:scale-95 transition-transform cursor-pointer";
        div.innerHTML = `<span class="text-2xl font-bold text-gray-800">${item.char}</span>`;
        div.onclick = ()=> {
            playAudio(item.char);
            openModal(item);
        };
        favGridEl.appendChild(div);
    })
}

// 詳細ポップアップを開く
function openModal(item){
    currentItem = item;
    modalChar.innerText = item.char;
    modalPro.innerText = item.pronounce;
    modalDesc.innerText = item.desc;
    updateFavButton();
    modal.classList.remove("hidden");
}

// ポップアップを閉じる
closeModal.onclick = ()=>{
    modal.classList.add("hidden");
}
modal.onclick = (e)=>{
    if(e.target === modal) modal.classList.add("hidden");
}

// お気に入り追加/削除ボタン
function updateFavButton(){
    const exist = favList.find(x=>x.char === currentItem.char);
    btnFav.innerText = exist ? "お気に入りから削除" : "お気に入りに追加";
}
btnFav.onclick = ()=>{
    const idx = favList.findIndex(x=>x.char === currentItem.char);
    if(idx >=0) favList.splice(idx,1);
    else favList.push(currentItem);
    localStorage.setItem("vn_consonant_fav", JSON.stringify(favList));
    updateFavButton();
    renderFav();
}

// タブページ切替
const tabBtns = document.querySelectorAll(".tab-btn");
const pages = document.querySelectorAll(".page");
tabBtns.forEach(btn=>{
    btn.onclick = ()=>{
        const targetId = btn.dataset.target;
        tabBtns.forEach(b=>{
            b.classList.remove("tab-active");
            b.querySelector("svg").classList.add("text-gray-500");
        })
        btn.classList.add("tab-active");
        btn.querySelector("svg").classList.remove("text-gray-500");
        pages.forEach(p=>p.classList.add("hidden"));
        document.getElementById(targetId).classList.remove("hidden");
    }
})

document.addEventListener("DOMContentLoaded", ()=>{
    renderCards();
    renderFav();
})

document.addEventListener("deviceready", ()=>{
    console.log("Cordova準備完了");
}, false);Code language: JavaScript (javascript)

方法2‑プラグイン再生

cordova‑plugin‑mediaプラグインを利用して再生します。

プラグインインストール

cordova plugin add cordova-plugin-media

実行ログ

D:\cordovademo\hello>cordova plugin add cordova-plugin-media
Installing "cordova-plugin-media" for android
Installing "cordova-plugin-file" for android
Subproject Path: CordovaLib
Subproject Path: app

The Android Persistent storage location now defaults to "Internal". Please check this plugin's README to see if your application needs any changes in its config.xml.

If this is a new application no changes are required.

If this is an update to an existing application that did not specify an "AndroidPersistentFileLocation" you may need to add:

      "<preference name="AndroidPersistentFileLocation" value="Compatibility" />"

to config.xml in order for the application to find previously stored files.

Adding cordova-plugin-media to package.jsonCode language: HTML, XML (xml)

オーディオ再生関数を置き換え

let mediaPlayer = null;

function playAudio(charName) {
    // 旧ファイルを停止
    if(mediaPlayer){
        mediaPlayer.stop();
        mediaPlayer.release();
        mediaPlayer = null;
    }
    // 重要：Cordova Android パスは www/audio/
    const src = `audio/${charName}.mp3`;
    mediaPlayer = new Media(src,
        ()=>{
            // 再生完了後リソース解放
            mediaPlayer.release();
            mediaPlayer = null;
        },
        (err)=>{
            console.error("オーディオ再生エラー", err);
        }
    );
    mediaPlayer.play();
}Code language: JavaScript (javascript)

上記コードを元のmain.jsの対象メソッドと置き換えてください。

// ベトナム語子音データ
const consonants = [
    {char: "b", pronounce: "/ɓ/", desc: "両唇入破音"},
    {char: "c", pronounce: "/k/", desc: "硬口蓋破裂音"},
    {char: "ch", pronounce: "/tɕ/", desc: "口蓋破擦音"},
    {char: "d", pronounce: "/ɗ/", desc: "歯茎入破音"},
    {char: "đ", pronounce: "/ɗ/", desc: "歯蓋有声音"},
    {char: "g", pronounce: "/ɣ/", desc: "口蓋摩擦音"},
    {char: "gh", pronounce: "/ɣ/", desc: "e、iの前で使用"},
    {char: "h", pronounce: "/h/", desc: "声門摩擦音"},
    {char: "k", pronounce: "/k/", desc: "硬口蓋無声破裂音"},
    {char: "kh", pronounce: "/x/", desc: "硬口蓋摩擦音"},
    {char: "l", pronounce: "/l/", desc: "歯茎側面音"},
    {char: "m", pronounce: "/m/", desc: "両唇鼻音"},
    {char: "n", pronounce: "/n/", desc: "歯茎鼻音"},
    {char: "ng", pronounce: "/ŋ/", desc: "軟口蓋鼻音"},
    {char: "ngh", pronounce: "/ŋ/", desc: "e,iの前で使用"},
    {char: "nh", pronounce: "/ɲ/", desc: "口蓋鼻音"},
    {char: "p", pronounce: "/p/", desc: "無気味両唇破裂音"},
    {char: "ph", pronounce: "/f/", desc: "唇歯摩擦音"},
    {char: "q", pronounce: "/kw/", desc: "常にuと組み合わせ"},
    {char: "r", pronounce: "/r/", desc: "歯茎ふるえ音"},
    {char: "s", pronounce: "/s/", desc: "歯茎摩擦音"},
    {char: "t", pronounce: "/t/", desc: "歯茎破裂音"},
    {char: "th", pronounce: "/θ/", desc: "歯摩擦音"},
    {char: "v", pronounce: "/v/", desc: "唇歯有声音摩擦音"},
    {char: "x", pronounce: "/s/", desc: "歯茎摩擦音"}
];

let favList = JSON.parse(localStorage.getItem("vn_consonant_fav")) || [];
let currentAudio = null; // グローバルオーディオオブジェクト、前の再生を停止用

const gridEl = document.getElementById("consonant-grid");
const favGridEl = document.getElementById("favorite-grid");
const modal = document.getElementById("modal");
const modalChar = document.getElementById("modal-char");
const modalPro = document.getElementById("modal-pronounce");
const modalDesc = document.getElementById("modal-desc");
const btnFav = document.getElementById("btn-fav");
const closeModal = document.getElementById("close-modal");

let currentItem = null;

// ====================== MP3再生関数 ======================
let mediaPlayer = null;

function playAudio(charName) {
    // 旧ファイルを停止
    if(mediaPlayer){
        mediaPlayer.stop();
        mediaPlayer.release();
        mediaPlayer = null;
    }
    // 重要：Cordova Android パスは www/audio/
    const src = `audio/${charName}.mp3`;
    mediaPlayer = new Media(src,
        ()=>{
            // 再生完了後リソース解放
            mediaPlayer.release();
            mediaPlayer = null;
        },
        (err)=>{
            console.error("オーディオ再生エラー", err);
        }
    );
    mediaPlayer.play();
}

// 子音カード描画
function renderCards(){
    gridEl.innerHTML = "";
    consonants.forEach(item=>{
        const div = document.createElement("div");
        div.className = "bg-cardBg rounded-lg py-5 text-center card-shadow active:scale-95 transition-transform cursor-pointer";
        div.innerHTML = `<span class="text-2xl font-bold text-gray-800">${item.char}</span>`;
        div.onclick = ()=> {
            playAudio(item.char); // カードクリックでMP3再生
            openModal(item);
        };
        gridEl.appendChild(div);
    })
}

// お気に入りページ描画
function renderFav(){
    favGridEl.innerHTML = "";
    if(favList.length === 0){
        favGridEl.innerHTML = `<p class="col-span-3 text-center text-gray-400 py-10">お気に入りはまだありません</p>`;
        return;
    }
    favList.forEach(item=>{
        const div = document.createElement("div");
        div.className = "bg-cardBg rounded-lg py-5 text-center card-shadow active:scale-95 transition-transform cursor-pointer";
        div.innerHTML = `<span class="text-2xl font-bold text-gray-800">${item.char}</span>`;
        div.onclick = ()=> {
            playAudio(item.char);
            openModal(item);
        };
        favGridEl.appendChild(div);
    })
}

// 詳細ポップアップを開く
function openModal(item){
    currentItem = item;
    modalChar.innerText = item.char;
    modalPro.innerText = item.pronounce;
    modalDesc.innerText = item.desc;
    updateFavButton();
    modal.classList.remove("hidden");
}

// ポップアップを閉じる
closeModal.onclick = ()=>{
    modal.classList.add("hidden");
}
modal.onclick = (e)=>{
    if(e.target === modal) modal.classList.add("hidden");
}

// お気に入り追加/削除ボタン
function updateFavButton(){
    const exist = favList.find(x=>x.char === currentItem.char);
    btnFav.innerText = exist ? "お気に入りから削除" : "お気に入りに追加";
}
btnFav.onclick = ()=>{
    const idx = favList.findIndex(x=>x.char === currentItem.char);
    if(idx >=0) favList.splice(idx,1);
    else favList.push(currentItem);
    localStorage.setItem("vn_consonant_fav", JSON.stringify(favList));
    updateFavButton();
    renderFav();
}

// タブページ切替
const tabBtns = document.querySelectorAll(".tab-btn");
const pages = document.querySelectorAll(".page");
tabBtns.forEach(btn=>{
    btn.onclick = ()=>{
        const targetId = btn.dataset.target;
        tabBtns.forEach(b=>{
            b.classList.remove("tab-active");
            b.querySelector("svg").classList.add("text-gray-500");
        })
        btn.classList.add("tab-active");
        btn.querySelector("svg").classList.remove("text-gray-500");
        pages.forEach(p=>p.classList.add("hidden"));
        document.getElementById(targetId).classList.remove("hidden");
    }
})

document.addEventListener("DOMContentLoaded", ()=>{
    renderCards();
    renderFav();
})

document.addEventListener("deviceready", ()=>{
    console.log("Cordova準備完了");
}, false);Code language: JavaScript (javascript)

オーディオを再生する

Posted in Cordova チュートリアル

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