Question

我的项目有2个音频文件，＆＃39; dog.mp3＆＃39;和＆＃39; cat.mp3＆＃39;所以下面的代码使我能够根据特定的列表视图项目点击播放任何声音但是如何修改代码以便我想实现以下目的？：

当＆＃39; cat.mp3＆＃39;正在播放，如果我点击了＆＃39; dog.mp3＆＃39;的列表视图项目，我想要＆＃39; cat.mp3＆＃39;文件停止播放和'dog.mp3＆＃39;音频播放。
当＆＃39; dog.mp3＆＃39;正在播放，如果我点击“cat.mp3＆＃39;”的列表视图项目，我想要＆＃39; dog.mp3＆＃39;文件停止播放和'cat.mp3＆＃39;音频播放。

所有帮助将不胜感激。

mainList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
            if (position == 0) {
            mp = MediaPlayer.create(Test.this, R.raw.cat);   
            mp.start();
            }

            if (position == 1) {
            mp = MediaPlayer.create(Test.this, R.raw.dog);   
            mp.start();
            }
        }
    });

错误

import android.media.MediaPlayer;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;


public class MainActivity extends ActionBarActivity {

    ListView mainList;

    String[] listContent = {
            "chimes", "chord", "ding",
            "notify", "recycle", "ringin",
            "ringout", "tada"
    };

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

        mainList = (ListView)findViewById(R.id.main_listView);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,listContent);
        mainList.setAdapter(adapter);

        int[] resID = { R.raw.chimes, R.raw.chord, R.raw.ding,
                R.raw.notify, R.raw.recycle, R.raw.ringin, R.raw.ringout, R.raw.tada };

        mainList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
                playSong(position);

            }
        });


        public void playSong(int songIndex) {
            // Play song
            mp.reset();
            mp.setDataSource(resID[songIndex]);

            mp.start();
            mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {

                @Override
                public void onCompletion(MediaPlayer mp) {
                    // TODO Auto-generated method stub
                    mp.release();
                }
            });
        }
    }
}

error

Answer 1

import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {

    // variable declaration
    private ListView mainList;
    private MediaPlayer mp;
    private final String[] listContent = { "chimes", "chord", "ding", "notify",
            "recycle", "ringin", "ringout", "tada" };

    private final int[] resID = { R.raw.chimes, R.raw.chord, R.raw.ding,
            R.raw.notify, R.raw.recycle, R.raw.ringin, R.raw.ringout,
            R.raw.tada };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Initializing variables
        mp = new MediaPlayer();
        mainList = (ListView) findViewById(R.id.main_listView);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, listContent);
        mainList.setAdapter(adapter);

        mainList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view,
                    int position, long id) {
                playSong(position);

            }
        });

    }

    public void playSong(int songIndex) {
        // Play song
        mp.reset();// stops any current playing song
        mp = MediaPlayer.create(getApplicationContext(), resID[songIndex]);// create's
                                                                            // new
                                                                            // mediaplayer
                                                                            // with
                                                                            // song.
        // if you don't know what is getApplicationContext() here better use
        // MainActivity.this or yourclassname.this
        mp.start(); // starting mediaplayer
        // setting up what to do if current song completes.
        /*
         * mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
         * 
         * @Override public void onCompletion(MediaPlayer mp) { // TODO
         * Auto-generated method stub
         * 
         * } });
         */
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        mp.release();
    }
}

Answer 2

您可能应该使用SoundPool： http://developer.android.com/reference/android/media/SoundPool.html

您可以加载onCreate中的所有音频，并将maxStreams设置为1，这样一次只能播放一个声音。

在每个按钮点击播放音频

2 个答案: