asynchronous - 做后台异步任务

Question

我正在尝试为 Mediaplayer 加载动态 URL。如何处理各种异常，如文件未找到和超时执行过程中出现的异常。

public class MediaAsynchTask extends AsyncTask<String, Void, Object> {
protected void onPreExecute() {
super.onPreExecute();
progress = new ProgressDialog(AudioView.this);
progress.setMessage("LOADING........");
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.setCancelable(true);
progress.show();
}
protected void onPostExecute(Object result) {
super.onPostExecute(result);
if(result!=null){
progress.dismiss();
}else{
Audio.this.finish();
}
}
Protected Object doInBackground(String... params) {
try {
if (!true) 
{
MediaPlayer m = MediaPlayer.create(Audio.this,Uri.parse("audiourl.mp3"));
myProgressBar.setMax(mMediaPlayer.getDuration());
}return mMediaPlayer;
}catch (Exception e) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),"Check Your NetWork and Data Connection",Toast.LENGTH_LONG).show();
}
});
} 
return mMediaPlayer;
}
}

Answer 1

它非常简单，您可以这样做：

try{
 **//your code goes here**
}catch(FileNotFoundException exception){
//handle exception
}//**handle other possible exceptions**
catch(JsonParseException exception){
    exception.printStackTrace();
}catch(JsonProcessingException exception){
    exception.printStackTrace();
}