Android设置时间后隐藏对话框，就像自定义时间间隔吐司一样

Question

我试图在屏幕上显示一些文本一段时间，类似于吐司，但能够指定它在屏幕上的确切时间。 我认为警报对话框可能适用于此，但我似乎无法弄清楚如何自动关闭对话框。

你能建议一个替代吐司通知，我可以指定它显示的确切时间吗？

谢谢！

static DialogInterface dialog = null;
public void toast(String text, int duration) {

    final AlertDialog.Builder builder = new AlertDialog.Builder(gameplay);

    LayoutInflater inflater = (LayoutInflater) gameplay.getSystemService(gameplay.LAYOUT_INFLATER_SERVICE);
    View layout = inflater.inflate(R.layout.tutorial, (ViewGroup)gameplay.findViewById(R.id.layout_root));
    ((TextView)layout.findViewById(R.id.message)).setText(text);

    builder
        .setView(layout);


    builder.show();

    if (dialog!=null){
        dialog.cancel();
        dialog.dismiss();
    }

    dialog = builder.create();


    Handler handler = null;
    handler = new Handler(); 
    handler.postDelayed(new Runnable(){ 
         public void run(){
             dialog.cancel();
             dialog.dismiss();
         }
    }, 500);


}

Answer 1

你只需要调用Dialog#dismiss() ; 对于你的问题Handler类就足够了（+1到Javanator :)）。

仅供参考，还有其他类，即AlarmManager ， Timer和TimerTask ，可以帮助您计算代码的运行时间。

编辑：

将您的代码更改为：

static DialogInterface dialog = null;
public void toast(String text, int duration) {

    final AlertDialog.Builder builder = new AlertDialog.Builder(gameplay);

    LayoutInflater inflater = (LayoutInflater) gameplay.getSystemService(gameplay.LAYOUT_INFLATER_SERVICE);
    View layout = inflater.inflate(R.layout.tutorial, (ViewGroup)gameplay.findViewById(R.id.layout_root));
    ((TextView)layout.findViewById(R.id.message)).setText(text);

    builder
        .setView(layout);


    //builder.show(); commented this line
// I don't understand the purpose of this if block, anyways
// let it remain as is at the moment
    if (dialog!=null){
        dialog.cancel();
        dialog.dismiss();
    }

    dialog = builder.create().show();


    Handler handler = null;
    handler = new Handler(); 
    handler.postDelayed(new Runnable(){ 
         public void run(){
             dialog.cancel();
             dialog.dismiss();
         }
    }, 500);


}

Answer 2

 // Make your Main UIWorker Thread to execute this statement
 Handler mHandler = new Handler(); 

做这样的事情你的代码需要解雇对话框。

 // this will dismiss the dialog after 2 Sec. set as per you 
 mHandler.postDelayed(new Runnable() {
    @Override
    public void run() {     
        dialog.dismiss();
    }
 },2000L); 

希望这个帮助:)