android - 如何让按钮点击每次按下时播放声音文件?

问题描述

我打开了一个新项目 -

I have open a new project -

现在我想做的是——通过按下按钮，我想要播放一个 mp3 文件 - 而且每次按下按钮时，声音文件都会从头开始播放 - 所以假设 mp3 是 10 秒长，我按下按钮，它正在播放，4 秒后我再次按下按钮，声音将再次播放.

Now what I would like to do is this -By pressing on the button I want an mp3 file being played - and also that each time the button is pressed than the sound file will start playing from the start of it once again - so let's say that the mp3 is 10 sec long, and I pressed the button and it's playing and after 4 sec I pressed the button again than the sound will be played again.

现在我想知道的是——1- 我应该把 mp3 文件放在哪里?

Now what I would like to know is-1- Where should I put the mp3 file?

2-我必须添加什么代码才能在按下按钮时播放 mp3 文件(我们将 mp3 文件称为 click_sound.mp3)?

2-what code do I have to add in order that when the button is pressed than the mp3 file will be played (let's call the mp3 file click_sound.mp3)?

3- 我需要在代码中添加什么才能在每次按下按钮时再次播放声音?

3- What I need to add to the code in order that the sound will be played again each time I will pressed the button?

这是MainActivity.java的代码-

This is the code of the MainActivity.java -

package com.example.test1;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

这是activity_main.xml

and this is the 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:text="@string/play" />

</RelativeLayout>

推荐答案

1. 您应该将 mp3 文件放在/assets 文件夹中.

1. You should put mp3 file in /assets folder.

将此代码放在 onCreate() 方法中 setContentView()

put this code inside onCreate() method after setContentView()

final MediaPlayer mp = new MediaPlayer();
Button b = (Button) findViewById(R.id.button1);

b.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {

        if(mp.isPlaying())
        {
            mp.stop();
        }

        try {
            mp.reset();
            AssetFileDescriptor afd;
            afd = getAssets().openFd("AudioFile.mp3");
            mp.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(),afd.getLength());
            mp.prepare();
            mp.start();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }



    }
});

3.每次按下按钮都会再次播放声音.您不必为此编写任何额外的代码.

3.sound will be played again each time you press button. You don't have to write any extra code for that.

注意AudioFile.mp3是/assets文件夹下的mp3文件名

希望这个回答有帮助:)

Hope this answer is helpful:)

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