我用下面的code和接收FileNotFound异常。谁能解释这是为什么？我使用的模拟器测试，2.3.3。

 私人无效setRingtone（）{
    byte []的缓冲区= NULL;
    InputStream的FIN = getBaseContext（）getResources（）openRawResource（R.raw.custom_ringtone）。
    INT大小= 0;

    尝试 {
        大小= fIn.available（）;
        缓冲区=新的字节[尺寸]
        fIn.read（缓冲液）;
        fIn.close（）;
    }赶上（IOException异常E）{
        Log.d（跟踪，IO 1+ E）;
    }

    字符串路径= Environment.getExternalStorageDirectory（）getPath（）+/媒体/铃声/。
    字符串文件名=custom_ringtone.mp3;

    布尔存在=（新文件（路径））存在（）;
    如果（！存在）{
        新的文件（路径）.mkdirs（）;
        Log.d（跟踪，路径添加+路径）;
    }其他{
        Log.d（跟踪，路径没有添加+路径）;
    }

    FileOutputStream中保存;
    尝试 {
        保存=新的FileOutputStream（路径+文件名）;
        save.write（缓冲液）;
        save.flush（）;
        save.close（）;
    }赶上（FileNotFoundException异常E）{
        Log.d（跟踪，FileNotFound+ E）;
    }赶上（IOException异常E）{
        Log.d（跟踪，IO 2+ E）;
    }

    sendBroadcast（新意图（Intent.ACTION_MEDIA_SCANNER_SCAN_FILE，Uri.parse（文件：//+路径+文件名）））;

    文件k =新的文件（路径，文件名）;

    ContentValues​​值=新ContentValues​​（）;
    values​​.put（MediaStore.MediaColumns.DATA，k.getAbsolutePath（））;
    values​​.put（MediaStore.MediaColumns.TITLE，日程安排陈绮贞）;
    values​​.put（MediaStore.MediaColumns.MIME_TYPE，音频/ MP3）;
    values​​.put（MediaStore.Audio.Media.ARTISTOne2MM）;
    values​​.put（MediaStore.Audio.Media.IS_RINGTONE，真正的）;
    values​​.put（MediaStore.Audio.Media.IS_NOTIFICATION，真正的）;
    values​​.put（MediaStore.Audio.Media.IS_ALARM，真正的）;
    values​​.put（MediaStore.Audio.Media.IS_MUSIC，假）;

    //把它插入到数据库
    开放的我们的uri = MediaStore.Audio.Media.getContentUriForPath（k.getAbsolutePath（））;
    。getContentResolver（）删除（URI，MediaStore.MediaColumns.DATA += \+ k.getAbsolutePath（）+\，NULL）;
    乌里newUri = getContentResolver（）插入（URI，值）。
    RingtoneManager.setActualDefaultRingtoneUri（MainActivity.this，RingtoneManager.TYPE_RINGTONE，newUri）;

}
 

解决方案

记住，你需要声明一个permision写入外部SD卡。

就在这一行添加到您的manifest.xml下的＆LT;舱单＆GT; 标签：

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.WRITE_EXTERNAL_STORAG​​E/＆GT;
 

I'm using the code below and receiving the "FileNotFound" exception. Can anyone explain why this is? I'm using the emulator to test, 2.3.3.

private void setRingtone(){
    byte[] buffer = null;
    InputStream fIn = getBaseContext().getResources().openRawResource(R.raw.custom_ringtone);
    int size = 0;

    try {
        size = fIn.available();
        buffer = new byte[size];
        fIn.read(buffer);
        fIn.close();
    } catch (IOException e) {
        Log.d("trace", "IO 1" + e);         
    }

    String path = Environment.getExternalStorageDirectory().getPath()+"/media/ringtone/";
    String filename = "custom_ringtone.mp3";

    boolean exists = (new File(path)).exists();
    if (!exists){
        new File(path).mkdirs();
        Log.d("trace", "path added" + path);
    }else{
        Log.d("trace", "path not added" + path);            
    }

    FileOutputStream save;
    try {
        save = new FileOutputStream(path+filename);
        save.write(buffer);
        save.flush();
        save.close();
    } catch (FileNotFoundException e) {
        Log.d("trace", "FileNotFound" + e);
    } catch (IOException e) {
        Log.d("trace", "IO 2" + e);
    }

    sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://"+path+filename)));

    File k = new File(path, filename);

    ContentValues values = new ContentValues();
    values.put(MediaStore.MediaColumns.DATA, k.getAbsolutePath());
    values.put(MediaStore.MediaColumns.TITLE, "Schedule Cheer");
    values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp3");
    values.put(MediaStore.Audio.Media.ARTIST, "One2MM");
    values.put(MediaStore.Audio.Media.IS_RINGTONE, true);
    values.put(MediaStore.Audio.Media.IS_NOTIFICATION, true);
    values.put(MediaStore.Audio.Media.IS_ALARM, true);
    values.put(MediaStore.Audio.Media.IS_MUSIC, false);

    //Insert it into the database
    Uri uri = MediaStore.Audio.Media.getContentUriForPath(k.getAbsolutePath());
    getContentResolver().delete(uri, MediaStore.MediaColumns.DATA + "=\"" + k.getAbsolutePath() + "\"", null);
    Uri newUri = getContentResolver().insert(uri, values); 
    RingtoneManager.setActualDefaultRingtoneUri(MainActivity.this, RingtoneManager.TYPE_RINGTONE, newUri);

}

Remember that you need to declare a permision to write to the external SD Card.

Just add this line to your manifest.xml under the <manifest> tag:

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