Android-如何使手机随着音乐播放而振动 [英] Android - How to make the phone vibrate to the music playing

问题描述

我是Android开发的新手.我想制作一个本质上是音乐播放器的应用程序，但手机会随着音乐播放的节奏而振动.我记得最早的诺基亚手机具有此功能，我想重新创建此功能.

I am new to Android development. I want to make an app that is essentially a music player but the phone can vibrate to the beat of the music playing. I remember the earliest Nokia phones had this feature, I want to recreate this for fun.

我的问题:作为Android应用，这可能吗?如果是这样，一般的方法是什么?我是否必须分析歌曲的声音模式然后更改振动强度?

My question: is this possible as an Android app? If so, what are the general approaches? Do I have to analyse the sound patterns of the song then alter the vibration intensity?

谢谢！

推荐答案

我对这个问题很感兴趣，经过深入研究，我找到了解决方法.所以我们开始吧.

I got interested with this question and after deep research I figured out how to do that. So here we go.

import android.media.MediaPlayer;
import android.os.Vibrator;

private Vibrator vibrator;
private MediaPlayer player;
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    player = MediaPlayer.create(this, R.raw.music);
    vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);

    player.start();

    //HERE WE WILL START VIBRATION

    Button button = (Button) findViewById(R.id.btn);
    button.setOnClickListener(this);
}

public void onClick(View v){
    player.stop();
    vibrator.cancel();
}

这是播放音乐的通用方法，现在可以与 vibrate(); 方法紧密配合.从所有 Vibrator 的构造函数中，我们需要以下一个:

This is general approach for playing music and now work tight with the method vibrate();. From all of constructors of class Vibrator we need this one:

public void vibrate (long milliseconds, AudioAttributes attributes);

它是在 API 21 中添加的作为第一个参数，我们可以传递歌曲的持续时间，而这个持续时间可以通过这种方式获得(

It was added in API 21 As first parameter we can pass the duration of the song and this duration we can get this way (source):

String mediaPath = Uri.parse("android.resource://<your-package-name>/raw/filename").getPath();
MediaMetadataRetriever mmr = new MediaMetadataRetriever();
mmr.setDataSource(mediaPath);
String duration = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);

作为第二个参数，我们需要在帮助下创建 AudioAttributes AudioAttributes.Builder :

As second parameter we need to create AudioAttributes with the help of AudioAttributes.Builder:

vibrator.vibrate(duration, new AudioAttributes.Builder()
                .setUsage(AudioAttributes.USAGE_MEDIA)
                .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
                .build());

请注意:我还没有尝试过.但是医生说应该可以.让我知道这是否完成了.最好的问候.

Please, NOTE: I haven't tried it. But the doc said it should works fine. Let me know if that is completed way. Best regards.

P.S.不要忘记许可:

P.S. Don't forget permission:

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

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