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 使用StringBuilder或StringBuffer但具有足够的初始容量以避免重新分配。 默认容量是16，所以一旦超过了，数据就必须复制到一个更大的地方。 使用append not + 。 
 
int integer = 5;

StringBuilder s = new StringBuilder(100);
s.append("something");
s.append(integer);
s.append("more text");
 
 预先分配100个插槽。 
 
 参考： http : //developer.android.com/reference/java/lang/StringBuilder.html 

Use StringBuilder or StringBuffer but with adequate initial capacity to avoid re-allocation. The default capacity is 16, so once you exceed that, the data has to be copied into a new bigger place. Use append not +.
 
int integer = 5;

StringBuilder s = new StringBuilder(100);
s.append("something");
s.append(integer);
s.append("more text");
 
Will allocate 100 slots upfront.
 
Reference: http://developer.android.com/reference/java/lang/StringBuilder.html