Question

我有一个字符串，例如＆＃34; abcde＆＃34;，并希望通过MediaPlayer拼写它的每个字母。假设它在sdcard文件夹下，a.mp3，b.mp3等我使用：

String s = "abcde";
int length = s.length(); //5
int i = 1;
char current_char = 'a';

mp = new MediaPlayer();
String filePath = "/sdcard/" + current_char + ".mp3";
mp.setDataSource(filePath);
mp.prepare();
mp.start(); //a is played

mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {

    if (i < length) {
        current_char = s.charAt(i);
        i++;

        mp.release();
        mp = new MediaPlayer();
        filePath = "/sdcard/" + current_char + ".mp3";
        mp.setDataSource(filePath);
        mp.prepare();
        mp.start();
        mp.setOnCompletionListener(this);
        }
    }
});

然而，这只会导致字母＆＃34; a＆＃34;仅播放。无法找到错误的内容，我怎么能这样做才能播放所有的字母？非常感谢

Answer 1

您在调用MediaPlayer.start（）后设置OnCompletionListener。

您可能错过了onCompletion事件。

尝试在对象实例之后设置侦听器，如下所示：

mp = new MediaPlayer();

mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {

    if (i < length) {
        current_char = s.charAt(i);
        i++;

        mp.release();
        mp = new MediaPlayer();
        mp.setOnCompletionListener(this);
        filePath = "/sdcard/" + current_char + ".mp3";
        mp.setDataSource(filePath);
        mp.prepare();
        mp.start();
       }
    }
});
mp.setDataSource(filePath);
mp.prepare();
mp.start(); //a is played

MediaPlayer - 连续播放mp3文件

1 个答案: