创建略长的消息的一个非常简单的方法如下:

private Toast myToast;

public MyView(Context context) {
  myToast = Toast.makeText(getContext(), "", Toast.LENGTH_LONG);
}

private Runnable extendStatusMessageLengthRunnable = new Runnable() {
  @Override
    public void run() {
    //Show the toast for another interval.
    myToast.show();
   }
}; 

public void displayMyToast(final String statusMessage, boolean extraLongDuration) {
  removeCallbacks(extendStatusMessageLengthRunnable);

  myToast.setText(statusMessage);
  myToast.show();

  if(extraLongDuration) {
    postDelayed(extendStatusMessageLengthRunnable, 3000L);
  }
}

注意，上面的示例消除了LENGTH_SHORT选项以保持示例简单。

通常不希望使用Toast消息在很长时间间隔内显示消息，因为这不是Toast类的预期目的。但是有时候，你需要显示的文本量可能需要用户超过3.5秒的时间来阅读，在这种情况下，稍微延长时间(例如，如上所示，到6.5秒)可能是有用的，并且与预期的用法一致。

你可能想试试:

for (int i=0; i < 2; i++)
{
      Toast.makeText(this, "blah", Toast.LENGTH_LONG).show();
}

使时间加倍。如果你指定3而不是2，它会使时间增加三倍等等。

下面是我用上面的代码创建的一个自定义Toast类:

import android.content.Context;
import android.os.CountDownTimer;
import android.widget.Toast;

public class CustomToast extends Toast {
    int mDuration;
    boolean mShowing = false;
    public CustomToast(Context context) {
        super(context);
        mDuration = 2;
    }


    /**
     * Set the time to show the toast for (in seconds) 
     * @param seconds Seconds to display the toast
     */
    @Override
    public void setDuration(int seconds) {
        super.setDuration(LENGTH_SHORT);
        if(seconds < 2) seconds = 2; //Minimum
        mDuration = seconds;
    }

    /**
     * Show the toast for the given time 
     */
    @Override
    public void show() {
        super.show();

        if(mShowing) return;

        mShowing = true;
        final Toast thisToast = this;
        new CountDownTimer((mDuration-2)*1000, 1000)
        {
            public void onTick(long millisUntilFinished) {thisToast.show();}
            public void onFinish() {thisToast.show(); mShowing = false;}

        }.start();  
    }
}

  private Toast mToastToShow;
  public void showToast(View view) {
 // Set the toast and duration
 int toastDurationInMilliSeconds = 10000;
 mToastToShow = Toast.makeText(this, "Hello world, I am a toast.",  Toast.LENGTH_LONG);

 // Set the countdown to display the toast
 CountDownTimer toastCountDown;
 toastCountDown = new CountDownTimer(toastDurationInMilliSeconds, 1000 /*Tick duration*/) {
  public void onTick(long millisUntilFinished) {
     mToastToShow.show();
  }
  public void onFinish() {
     mToastToShow.cancel();
     }
    };

    // Show the toast and starts the countdown
     mToastToShow.show();
     toastCountDown.start();
      }

将吐司设置为以毫秒为单位的特定时间段:

public void toast(int millisec, String msg) {
    Handler handler = null;
    final Toast[] toasts = new Toast[1];
    for(int i = 0; i < millisec; i+=2000) {
        toasts[0] = Toast.makeText(this, msg, Toast.LENGTH_SHORT);
        toasts[0].show();
        if(handler == null) {
            handler = new Handler();
            handler.postDelayed(new Runnable() {
                @Override
                public void run() {
                    toasts[0].cancel();
                }
            }, millisec);
        }
    }
}

为什么要吃吐司，当你可以拥有整个Snackbar: https://developer.android.com/reference/android/support/design/widget/Snackbar.html

小吃店>吐司，定制吐司，油炸面包丁