在子线程中弹出Toast

1.利用runOnUiThread

runOnUiThread(new Runnable() {

@Override
public void run() {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), action,
Toast.LENGTH_SHORT).show();
}

});

Looper.prepare();

Toast.makeText(context, "下载成功", Toast.LENGTH_SHORT).show();
Looper.loop();