Question

我正在尝试制作音板应用，但我遇到了处理声音文件的问题。更具体地说，我不知道如何获得它，所以当按下按钮时它会播放相应的声音。

我尝试过这种方式 Play sound on button click android

我尝试为每个声音文件和按钮实现媒体播放器，但应用程序在启动时崩溃。

我有10个按钮，其中有10个相应的声音文件位于src / res / raw /

中的原始文件中

关于如何使其发挥作用的任何想法？

//this is a breaking bad soundboard app, so please excuse the language. Sorry if you      find it offensive
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new PlaceholderFragment())
                .commit();
    }

    whatup = (Button)this.findViewById(R.id.button);
    haveatit = (Button)this.findViewById(R.id.button2);
    hello = (Button)this.findViewById(R.id.button3);
    whining = (Button)this.findViewById(R.id.button7);
    money = (Button)this.findViewById(R.id.button4);
    yeah= (Button)this.findViewById(R.id.button8);
    miserable = (Button)this.findViewById(R.id.button5);
    mother = (Button)this.findViewById(R.id.button9);
    gatorade = (Button)this.findViewById(R.id.button6);
    science = (Button)this.findViewById(R.id.button10);

    whatup.setOnClickListener(this);
    haveatit.setOnClickListener(this);
    hello.setOnClickListener(this);
    whining.setOnClickListener(this);
    money.setOnClickListener(this);
    yeah.setOnClickListener(this);
    miserable.setOnClickListener(this);
    mother.setOnClickListener(this);
    gatorade.setOnClickListener(this);
    science.setOnClickListener(this);

    WhatUp = MediaPlayer.create(MainActivity.this, R.raw.whatupb);
    HaveAtIt = MediaPlayer.create(MainActivity.this, R.raw.haveatit);
    Hello = MediaPlayer.create(MainActivity.this, R.raw.hello);
    Whining = MediaPlayer.create(MainActivity.this, R.raw.stopwhining);
    Money = MediaPlayer.create(MainActivity.this, R.raw.wheresmymoney);
    Yeah = MediaPlayer.create(MainActivity.this, R.raw.yeahb);
    Miserable = MediaPlayer.create(MainActivity.this, R.raw.miserableb);
    Mother = MediaPlayer.create(MainActivity.this, R.raw.motherofgod);
    Gatorade = MediaPlayer.create(MainActivity.this, R.raw.gatorade);
    Science = MediaPlayer.create(MainActivity.this, R.raw.yeahscience);

}

这是按下按钮时的处理方式。显然需要更多，但我只是测试了1个按钮，当我尝试启动它时崩溃了。

  @Override
public void onClick(View view) {
    if(view==whatup)
    {
        WhatUp.start();
    }
}

记录Cat错误： http://imgur.com/ZWYsLl7

Answer 1

我认为您的声音可能是sound_1，sound_2，sound_3等，而您的按钮是button_1，button_2等等。<登记/> 您应该创建一个循环来获取onCreate方法中的ID：

for (int i = 0; i < 10; i++) {
    // get the id for buttons
    int btnId = getResources().getIdentifier("button_"+i, "id", getPackageName());
    // get the res for sounds
    int rawId = getResources().getIdentifier("sound_"+i, "raw", getPackageName());
    // set a click listener to all your buttons
    button[i] = (Button) findViewById(id);
    button[i].setOnClickListener(new OnClickListener() {
        public void onClick(View view) {
            // create the media player with the raw id
            mp = MediaPlayer.create(MainActivity.this, rawId);
            mp.setOnCompletionListener(new OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                    // TODO Auto-generated method stub
                    // avoid NullPointerException see the links below
                    mp.release();
                }
            });   
            // play the sound
            mp.start();
         }
    });
}

阅读主题参考：Using MediaPlayer。您还可以使用上下文How to dynamically generate the raw resource identifier in android?来识别，这可能有助于您解释release()方法：Play sound on button click - Null pointer exception并阅读Using MediaPlayer中的Releasing the MediaPlayer部分。我不确定但它应该做的伎俩..
祝好运。

<强>更新

将此检查if(view==whatup)更改为if(view.getId() == R.id.button) 在onClick方法中，您需要使用getId()方法检查有关视图的ID。

Android按钮音板

1 个答案: