Question

有没有办法可以通过编程方式停止Toast消息？

假设我有一个按钮，我点击滚动查看Toast消息，在onclick事件中我想停止所有队列并只显示新的，我该怎么做？

我的代码的简化版本如下 - 代码：

public class Help extends Activity{

LinearLayout background;
int screenNo = 1;
Toast toast;

 /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.help);

       background = (LinearLayout) findViewById(R.id.helpLayout);

        ImageButton next = (ImageButton) findViewById(R.id.imageButtonNext);
        next.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                toast.cancel();
                showNextScreen();
            }});        
 }

private void showMessageBox(String title, String msg) {
    AlertDialog.Builder b = new AlertDialog.Builder(this);
     b.setTitle(title);
     b.setMessage(msg);
     b.setPositiveButton("Next", new DialogInterface.OnClickListener() {
         public void onClick(DialogInterface arg0, int arg1) {
             showNextScreen();
        }});
     b.setNegativeButton("Quit Help", new DialogInterface.OnClickListener() {
         public void onClick(DialogInterface arg0, int arg1) {
                 returnHome();
        }});
     b.show();
 }

private void showNextScreen() {
    int time = 7000;
    String tstMsg = "error";    

    switch (screenNo) {
    case 1:
        break;          
    case 2:
        break;          
    case 3:
        break;          
    case 4:
        break;
    case 5:
        toast.cancel();
        returnHome();
        break;

    default:
        break;
    }

    if(screenNo < 5)
    {
    toast=Toast.makeText(this, tstMsg, time);   
    toast.setGravity(Gravity.BOTTOM, 0, 0);
    toast.show();
    screenNo++;
    }
}
}

Answer 1

这就是我实现这一目标的方式。

public static Toast toastShow;

public void showToast(Activity actRef, String message) {

    if (toastShow == null
            || toastShow.getView().getWindowVisibility() != View.VISIBLE) {
        toastShow = Toast.makeText(actRef, message, Toast.LENGTH_SHORT);
        toastShow.setGravity(Gravity.CENTER, 0, 0);
        toastShow.show();
    }
}

在单独的类中定义上面的代码并实例化你想要显示消息的那个类，你就完成了它。

Answer 2

创建自定义全局对象

private Toast toast;

在onCreate中初始化

 toast = Toast.makeText(YOUR_CLASS_NAME.this, "", Toast.LENGTH_SHORT);

每当你需要展示Toast

时

toast.setText("Hi....");
toast.show();

根据onPause或onDestroy

的要求杀死所有消息

toast.cancel();

Answer 3

你们cancel the Toast object都是自由的。

以编程方式安装Android Toast通知？

3 个答案: