更新时间:2023-09-20 12:28:10
无法修改数组的大小.如果你想要一个更大的数组,你必须实例化一个新的.
The size of an array can't be modified. If you want a bigger array you have to instantiate a new one.
更好的解决方案是使用 ArrayList
可以根据需要增长.如果您需要这种形式的数组,方法 ArrayList.toArray( T[] a )
将返回您的数组.
A better solution would be to use an ArrayList
which can grow as you need it. The method ArrayList.toArray( T[] a )
gives you back your array if you need it in this form.
List<String> where = new ArrayList<String>();
where.add( ContactsContract.Contacts.HAS_PHONE_NUMBER+"=1" );
where.add( ContactsContract.Contacts.IN_VISIBLE_GROUP+"=1" );
如果你需要把它转换成一个简单的数组...
If you need to convert it to a simple array...
String[] simpleArray = new String[ where.size() ];
where.toArray( simpleArray );
但是你用数组做的大多数事情你也可以用这个 ArrayList 做:
But most things you do with an array you can do with this ArrayList, too:
// iterate over the array
for( String oneItem : where ) {
...
}
// get specific items
where.get( 1 );