android - Android停止跨多个 Activity 的SoundPool循环。或在更改页面时停止所有播放声音

Question

我现在仅用Android和Java编程了几周，试图制作一个吉他调音器来通过耳朵来调音。一个简单的引用调谐器。我已经使用了很多此网站代码来构建它。

单击另一个页面/ Activity 时如何使SoundPool停止。

目前，我有两个页面，每个页面都有7个声音按钮。当您单击任何按钮时，它会无限循环，直到您单击另一个按钮，然后循环，依次类推...如果我单击下一页的按钮，然后单击一个新按钮，则最后一页的声音仍在播放!当您尝试用耳朵调整吉他时，会很烦!

也许只是一个简单的停止按钮即可停止整个SoundPool，这是一个好主意吗？

这是我的SoundManager代码
软件包org.gtdb.guitar_tuners;

    import android.content.Context;
    import android.media.AudioManager;
    import android.media.SoundPool;

    public class SoundManager 
    {
        private Context pContext;
        private SoundPool sndPool;
        private float rate = 1.0f;
        private float masterVolume = 1.0f;
        private float leftVolume = 1.0f;
        private float rightVolume = 1.0f;
        private float balance = 0.5f;

        // Constructor, setup the audio manager and store the app context
        public SoundManager(Context appContext)
        {
          sndPool = new SoundPool(1, AudioManager.STREAM_MUSIC, 100);
          pContext = appContext;
        }

        // Load up a sound and return the id
        public int load(int sound_id)
        {
            return sndPool.load(pContext, sound_id, 1);
        }

        // Play a sound
        public void play(int sound_id)
        {
            sndPool.play(sound_id, leftVolume, rightVolume, 100, -1, rate);     
        }


        // Set volume values based on existing balance value
        public void setVolume(float vol)
        {
            masterVolume = vol;

            if(balance < 1.0f)
            {
                leftVolume = masterVolume;
                rightVolume = masterVolume * balance;
            }
            else
            {
                rightVolume = masterVolume;
                leftVolume = masterVolume * ( 2.0f - balance );
            }

        }

        public void setSpeed(float speed)
        {
            rate = speed;

            // Speed of zero is invalid 
            if(rate < 0.01f)
                rate = 0.01f;

            // Speed has a maximum of 2.0
            if(rate > 2.0f)
                rate = 2.0f;
        }

        public void setBalance(float balVal)
        {
            balance = balVal;

            // Recalculate volume levels
            setVolume(masterVolume);
        }



        // Free ALL the things!
        public void unloadAll()
        {
            sndPool.release();      
        }

    }

这是我的 Activity 代码Main.java
软件包org.gtdb.guitar_tuners;

    import android.app.Activity;
    import android.content.Intent;
    import android.net.Uri;
    import android.os.Bundle;
    import android.view.Menu;
    import android.view.MenuInflater;
    import android.view.MenuItem;
    import android.view.View;
    import android.view.Window;
    import android.view.WindowManager;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.ImageButton;
    import android.widget.ImageView;
    import android.widget.Toast;        
    import com.google.ads.AdRequest;
    import com.google.ads.AdSize;
    import com.google.ads.AdView;

    import android.widget.LinearLayout;

    public class Main extends Activity {

        SoundManager snd;
        int string1, string2, string3, string4, string5, string6, string7;
        OnClickListener buttZonClick;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            requestWindowFeature(Window.FEATURE_NO_TITLE);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
            setContentView(R.layout.main);

            LinearLayout layout = (LinearLayout) findViewById(R.id.adMobUnit);

            // Create the adView
            // Please replace MY_BANNER_UNIT_ID with your AdMob Publisher ID
            AdView adView = new AdView(this, AdSize.IAB_MRECT, "aaaaaaaaaaaaa");

            // Add the adView to it
            layout.addView(adView);

            // Initiate a generic request to load it with an ad
            AdRequest request = new AdRequest();
            request.setTesting(true);

            adView.loadAd(request);

            // Create an instance of our sound manger
            snd = new SoundManager(getApplicationContext());

            // Load the samples from res/raw
            string1 = snd.load(R.raw.eadgbe1);
            string2 = snd.load(R.raw.eadgbe2);
            string3 = snd.load(R.raw.eadgbe3);
            string4 = snd.load(R.raw.eadgbe4);
            string5 = snd.load(R.raw.eadgbe5);
            string6 = snd.load(R.raw.eadgbe6);
            string7 = snd.load(R.raw.eadgbestrum);

            /** Tuner Link **/
            Button b1 = (Button) findViewById(R.id.tuner1);
            b1.setOnClickListener(new OnClickListener() {

                public void onClick(View v) {
                    startActivity(new Intent(Main.this, Dadgad.class));
                }
            });
            /** Tuner Link **/
            Button b2 = (Button) findViewById(R.id.tuner2);
            b2.setOnClickListener(new OnClickListener() {

                public void onClick(View v) {
                    startActivity(new Intent(Main.this, Daefce.class));


                }
            });

            /** gtdb.org Link **/
            ImageButton b7 = (ImageButton) findViewById(R.id.imageButton1);
            b7.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
                    Intent i = new Intent(Intent.ACTION_VIEW, Uri
                            .parse("http://www.gtdb.org/stats/click.php?id=17"));
                    startActivity(i);
                }
            });

        }

        public int count = 0;
        // Button listener assigned in XML layout
        public void clickHandler(View v) {
            int id = v.getId(); // Use the button id to determine which sample
                                // should be played

            switch (id) {
            case R.id.button1:
                    snd.play(1);
                break;

            case R.id.button2:
                snd.play(2);
                break;

            case R.id.button3:
                snd.play(3);
                break;

            case R.id.button4:
                snd.play(4);
                break;

            case R.id.button5:
                snd.play(5);
                break;

            case R.id.button6:
                snd.play(6);
                break;

            case R.id.button7:
                snd.play(7);
                break;
            }
        }

        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            MenuInflater inflater = getMenuInflater();
            inflater.inflate(R.menu.menu, menu);
            return true;
        }

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            if (item.getItemId() == R.id.item1) {
                Toast.makeText(Main.this,
                        "Android Guitar Tuner App from Guitar Tunings Database - www.gtdb.org",
                        Toast.LENGTH_LONG).show();
            }
            return super.onOptionsItemSelected(item);
        }

    }

为代码道歉，我可能会觉得这很混乱，因为我基本上是Java和Android的新手。我一直在与其他人的代码和观看lynda.com的视频拼凑在一起。

我的调谐器的当前版本在市场上，但是声音没有循环，因此您可以浏览页面并收听。但没有循环，您必须继续按下按钮来调整吉他!你可以看到 here

Answer 1

Soundpool.stop(int)对您有用吗？如果是这样，为什么不覆盖Activity.onPause()方法并将其放在那里呢？