在 Android 中定义 ASyncTask 及其关联方法时,会出现 3 个点,例如 protected Long doInBackground(URL... urls)
这些点是什么意思?
最佳答案
这并不完全相同。考虑以下示例
示例1:
public String concatenateStrings(String... strings){
StringBuffer sb = new StringBuffer();
for( int i = 0; i < strings.length; i++ )
sb.append( strings[i] );
return sb.toString();
}
示例2:
public String concatenateStrings2(String[] strings){
StringBuffer sb = new StringBuffer();
for( int i = 0; i < strings.length; i++ )
sb.append( strings[i] );
return sb.toString();
}
它们几乎完全相同,对吧?错了,叫他们区别就大了。第一个示例允许添加未定义数量的字符串。
示例1:
concantenateStrings("hello", "World", " I ", " can ", " add ", " so ", " many strings here" );
示例2:
Strings[] myStrings = new Strings[7];
myStrings[0] = "Hello";
myStrings[1] = "world";
myStrings[2] = " I ";
...
myStrings[6] = " many strings here";
concatenateStrings2( myStrings );
关于java - android 异步任务,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9253830/