android BroadcastReceiver怎么弹出一个窗口？？？

Question

定义好窗口，每次调用show方法就出错了，怎么回事》？？？？？？

Answer 1

new Thread( new Runnable() { public void run() {
final Dialog dialog=new Dialog(context);
                 dialog.setContentView(R.layout.dialog);
                 dialog.setTitle("00000");
                 handler.post(new Runnable() {

public void run() {
                 dialog.show();
}
});
}
}).start();

Answer 2

AlertDialog.Builder adb = new AlertDialog.Builder(context);
adb.setTitle("生日提醒");
adb.setMessage("生日到了");
adb.setPositiveButton("停止播放", new OnClickListener() { public void onClick(DialogInterface dialog, int which) {
mediaPlayer.stop();
mediaPlayer.release(); }
}); adb.show();