録音/録画/音声検索

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="14dp"
        android:layout_marginTop="28dp"
        android:text="録音(音声)" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/button1"
        android:layout_marginTop="34dp"
        android:text="録画(動画)" />

    <TextView
        android:id="@+id/speak_result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@+id/button2" />

    <ImageButton
        android:id="@+id/speak"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/button1"
        android:layout_centerVertical="true"
        android:src="@android:drawable/ic_btn_speak_now" />

</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.recordtest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.recordtest.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

MainActivity.java

package com.example.recordtest;

import java.io.File;
import java.io.IOException;
import java.util.List;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.speech.RecognizerIntent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

import com.google.common.io.Files;

public class MainActivity extends Activity {

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

        findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                startAudioRecorder();
            }
        });
        findViewById(R.id.button2).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                startMovieRecorder();
            }
        });
        findViewById(R.id.speak).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                startSpeakSearch();
            }
        });
    }

    private enum RequestType {
        LAUNCH_MIC(0),
        LAUNCH_MOVIE(1),
        START_SEARCH_VOICE(2);

        private int requestCode;

        RequestType(int requestCode) {
            this.requestCode = requestCode;
        }

        public int getRequestCode() {
            return requestCode;
        }

        public static RequestType fromRequestCode(int requestCode) {
            for (RequestType type : RequestType.values()) {
                if (type.requestCode == requestCode) {
                    return type;
                }
            }
            throw new RuntimeException("invalid code: " + requestCode);
        }
    }

    private void startAudioRecorder() {
        Intent intent = new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION);
        try {
            startActivityForResult(intent, RequestType.LAUNCH_MIC.getRequestCode());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void startMovieRecorder() {
        Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
        try {
            startActivityForResult(intent, RequestType.LAUNCH_MOVIE.getRequestCode());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void startSpeakSearch() {
        try {
            Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
            intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
            intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "音声変換");
            startActivityForResult(intent, RequestType.START_SEARCH_VOICE.getRequestCode());
        } catch (ActivityNotFoundException e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        switch (RequestType.fromRequestCode(requestCode)) {
        case LAUNCH_MIC:
        case LAUNCH_MOVIE:
            back2MicAndMovieProcess(data);
            break;

        case START_SEARCH_VOICE:
            back2VoiceSearchProcess(data);
            break;

        default:
            return;
        }
    }

    private void back2MicAndMovieProcess(Intent data) {
        final String savedPath = getSavedPath(this, data);

        // 同階層に別名保存
        move(savedPath, savedPath + "_");
    }

    private void back2VoiceSearchProcess(Intent data) {
        // 結果文字列リスト
        if (data == null) {
            return null;
        }
        final List<String> resultList = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
        if (resultList == null || resultList.size() == 0) {
            return;
        }
        showVoiceSearchConfirmDialog(resultList);
    }

    private static String getSavedPath(Context context, Intent data) {
        // 保存先パス取得
        if (data == null) {
            return null;
        }
        Uri uri = data.getData();
        if (uri == null) {
            return null;
        }
        return getFilePathFromUri(context, uri);
    }

    private static String getFilePathFromUri(Context context, Uri uri) {
        Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
        cursor.moveToFirst();
        int index = cursor.getColumnIndex(MediaStore.Audio.AudioColumns.DATA);
        return cursor.getString(index);
    }

    private static void move(final String fromPath, String toPath) {
        try {
            // move(copy+delete)
            File from = new File(fromPath);
            File to = new File(toPath);
            Files.copy(from, to);
            from.delete();

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void showVoiceSearchConfirmDialog(final List<String> resultList) {
        // ダイアログ表示
        final String[] results = resultList.toArray(new String[0]);
        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
        dialog.setTitle("検索結果");
        dialog.setItems(results, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int index) {
                TextView resultView = (TextView) findViewById(R.id.speak_result);
                resultView.setText(resultList.get(index));
            }
        });
        dialog.show();
    }
}