每次单击按钮时播放音频

Question

我的项目有 2 个音频文件，'dog.mp3' 和 'cat.mp3'，因此下面的代码使我能够根据特定的列表视图项点击播放任何一种声音，但是我如何修改代码以便我想实现以下目标？:

当 'cat.mp3' 正在播放时，如果我点击 'dog.mp3' 的列表视图项目，我希望 'cat.mp3' 文件停止播放并播放 'dog.mp3' 音频.
当 'dog.mp3' 正在播放时，如果我点击 'cat.mp3' 的列表视图项目，我希望 'dog.mp3' 文件停止播放并播放 'cat.mp3' 音频.

我们将不胜感激。

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();
                }
            });
        }
    }
}

Answer 1

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

您可以在 onCreate 中加载所有音频并将 maxStreams 设置为 1，以便一次只播放一种声音。

Answer 2

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();
    }
}

每次单击按钮时播放音频

Play audio upon each button click

java

audio

android

android-studio