Determines if a TextView contains empty text. - Android User Interface

Android examples for User Interface:TextView

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Description

Determines if a TextView contains empty text.

Demo Code

/*/*from   ww w  .ja  v  a 2  s. c  o m*/
 * Copyright 2013 Edmond Chui
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;

import android.text.TextUtils;

import android.widget.TextView;

public class Main {
    /**
     * Determines if a {@link TextView} contains empty text.
     * 
     * @see #isTextEmpty(TextView, int)
     * @see TextUtils#isEmpty(CharSequence)
     * @param e
     *            non-null instance of an {@code TextView}
     */
    public static boolean isTextEmpty(TextView e) {
        return TextUtils.isEmpty(e.getText().toString());
    }

    /**
     * Determines if a {@link TextView} contains empty text.
     * </br>
     * If it is empty, the {@code TextView} will display a error message, and
     * requests focus.
     * 
     * @see TextUtils#isEmpty(CharSequence)
     * @param errorString
     *            the resource id of {@code R.string.*}
     * @param e
     *            non-null instance of an {@code TextView}
     */
    public static boolean isTextEmpty(int errorString, TextView e) {
        boolean isEmpty = TextUtils.isEmpty(e.getText().toString());
        if (isEmpty) {
            e.setError(e.getContext().getText(errorString));
            e.requestFocus();
        }
        return isEmpty;
    }
}

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