在捕获到IllegalStateException之后，如何重试try-catch

Question

我知道以前有人问过这个问题，但我无法在代码中实现它。如果我捕获，如何再次重试try-catch块？

if(mediaPlayer!=null){
try {
mediaPlayer.start();
songEnded = 0;
} catch(IllegalStateException e) {
// media player is not initialized

//TRY AGAIN
}

}

Answer 1

我认为最好的办法是将其封装在while循环中，并在while环路中添加一个条件来检查媒体播放器是否已启动。

例如：

void playMediaPlayer() {
MediaPlayer mediaPlayer = new MediaPlayer();

while (!mediaPlayer.initialized) {
try {
mediaPlayer.start();
mediaPlayer.initialized = true;
} catch (IllegalStateException ignored) {
// optionally wait some time before trying again
try {
Thread.sleep(100L);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}

static class MediaPlayer {

boolean initialized = false;

public void start() throws IllegalStateException{
}
}