Android設置時間后隱藏對話框，就像自定義時間間隔吐司一樣

Question

我試圖在屏幕上顯示一些文本一段時間，類似於吐司，但能夠指定它在屏幕上的確切時間。 我認為警報對話框可能適用於此，但我似乎無法弄清楚如何自動關閉對話框。

你能建議一個替代吐司通知，我可以指定它顯示的確切時間嗎？

謝謝！

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

你只需要調用Dialog#dismiss() ; 對於你的問題Handler類就足夠了（+1到Javanator :)）。

僅供參考，還有其他類，即AlarmManager ， Timer和TimerTask ，可以幫助您計算代碼的運行時間。

編輯：

將您的代碼更改為：

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(); 

做這樣的事情你的代碼需要解雇對話框。

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

希望這個幫助:)