1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.widget; 18 19 import android.text.InputFilter; 20 import android.text.Spanned; 21 import android.widget.TextView; 22 23 /** 24 * Helper class to disable input on a TextView. The input is disabled by swapping in an InputFilter 25 * that discards all changes. Use with care if you have customized InputFilter on the target 26 * TextView. 27 */ 28 public class TextViewInputDisabler { 29 private TextView mTextView; 30 private InputFilter[] mDefaultFilters; 31 private InputFilter[] mNoInputFilters = new InputFilter[] { 32 new InputFilter () { 33 @Override 34 public CharSequence filter(CharSequence source, int start, int end, Spanned dest, 35 int dstart, int dend) { 36 return ""; 37 } 38 } 39 }; 40 41 public TextViewInputDisabler(TextView textView) { 42 mTextView = textView; 43 mDefaultFilters = mTextView.getFilters(); 44 } 45 46 public void setInputEnabled(boolean enabled) { 47 mTextView.setFilters(enabled ? mDefaultFilters : mNoInputFilters); 48 } 49 } 50
