Call Activity findViewById (int) with the given parameters. - Android User Interface

Android examples for User Interface:View Find

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  4. View Find

Description

Call Activity findViewById (int) with the given parameters.

Demo Code

/*/*  w w w  . jav  a 2  s  .  c om*/
 * 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.app.Activity;

import android.view.View;

public class Main {
    /**
     * Call {@link Activity#findViewById(int)} with the given parameters. The
     * return type of the {@code View} is inferred by the generic type V.
     * 
     * @throws ClassCastException
     *             if the view is not of type V.
     */
    // let it crash run-time!
    @SuppressWarnings("unchecked")
    public static <V extends View> V findView(Activity activity, int id) {
        return (V) activity.findViewById(id);
    }

    /**
     * Calls {@link View#findViewById(int)} with the given parameters. The
     * return type of the {@code View} is inferred by the generic type V.
     * 
     * @throws ClassCastException
     *             if the view is not of type V.
     */
    // let it crash run-time!
    @SuppressWarnings("unchecked")
    public static <V extends View> V findView(View parent, int id) {
        return (V) parent.findViewById(id);
    }
}

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