我有以下代码：
private Toast movieRecordToast;
private void displayNextMovie() {
if (movieRecordToast != null) movieRecordToast.cancel(); // cancel prevIoUs Toast (if user changes movies too often)
movieRecordToast = Toast.makeText(getApplicationContext(),"Next",Toast.LENGTH_SHORT);
movieRecordToast.show();
private void displayPrevMovie() {
if (movieRecordToast != null) movieRecordToast.cancel();
movieRecordToast = Toast.makeText(getApplicationContext(),"Prev",Toast.LENGTH_SHORT);
movieRecordToast.show();
但是如果displayNextMovie被快速调用几次,然后显示displayPrevMovie,“Next”Toast仍然显示,只有在显示“Prev”之后.
看起来取消不正常.
解决方法
每次您想要显示一个新的文本时,您可以轻松地只保留一个Toast对象,而不需要创建一个新的Toast对象,并取消当前的Toast.在显示下一个Toast之前,您可以使用Toast.setText()函数更改文本.
示例代码：
private Toast mToastText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Create the object once.
mToastText = Toast.makeText(this,"",Toast.LENGTH_SHORT);
}
private void displayText(final String message) {
mToastText.cancel();
mToastText.setText(message);
mToastText.show();
}