android判斷輸入框EditText是否為空
阿新 • • 發佈：2019-01-07
一，通過判斷輸入值長度是否為零
String serch_textip=mEdit1.getText().toString().trim();
if(serch_textip.length()==0) //判斷IP輸入框是否為空
{Toast.makeText(MainActivity.this,"請輸入ip", Toast.LENGTH_LONG).show();}二，比較輸入值是否為Empty
String serch_textip=mEdit1.getText().toString().trim(); if(serch_textip.isEmpty()) //判斷IP輸入框是否為空 {Toast.makeText(MainActivity.this,"請輸入IP", Toast.LENGTH_LONG).show();}
三，比較輸入值是否為null或者“ ”
String serch_textinfo =mEdit.getText().toString();
if(null == serch_textinfo || "".equals(serch_textinfo))
{Toast.makeText(this,"請輸入Info", Toast.LENGTH_LONG).show();} //判斷Info輸入框是否為空