改行を入力させない EditText 用 InputFilter

view plainprint?

1. class MainActivity : AppCompatActivity() {  
2.   
3.     override fun onCreate(savedInstanceState: Bundle?) {  
4.         super.onCreate(savedInstanceState)  
5.         setContentView(R.layout.activity_main)  
6.   
7.         val editText = findViewById<EditText>(R.id.editText)  
8.         editText.filters = editText.filters + MyInputFilter()  
9.     }  
10. }  
11.   
12. class MyInputFilter : InputFilter {  
13.   
14.     override fun filter(  
15.         source: CharSequence,  
16.         start: Int,  
17.         end: Int,  
18.         dest: Spanned,  
19.         dstart: Int,  
20.         dend: Int  
21.     ): CharSequence? {  
22.   
23.         var i: Int = start  
24.         while (i < end) {  
25.             if (source[i] == '\n') {  
26.                 break  
27.             }  
28.             i++  
29.         }  
30.   
31.         if (i == end) {  
32.             return null  
33.         }  
34.   
35.         val filtered = SpannableStringBuilder(source, start, end)  
36.         val start2 = i - start  
37.         val end2 = end - start  
38.   
39.         for (j in end2 - 1 downTo start2) {  
40.             if (source[j] == '\n') {  
41.                 filtered.delete(j, j + 1)  
42.             }  
43.         }  
44.   
45.         return filtered  
46.     }  
47. }  

class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val editText = findViewById<EditText>(R.id.editText) editText.filters = editText.filters + MyInputFilter() } } class MyInputFilter : InputFilter { override fun filter( source: CharSequence, start: Int, end: Int, dest: Spanned, dstart: Int, dend: Int ): CharSequence? { var i: Int = start while (i < end) { if (source[i] == '\n') { break } i++ } if (i == end) { return null } val filtered = SpannableStringBuilder(source, start, end) val start2 = i - start val end2 = end - start for (j in end2 - 1 downTo start2) { if (source[j] == '\n') { filtered.delete(j, j + 1) } } return filtered } }