Android Open Source - android-utils View Finder

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License

The source code is released under:
Apache License
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Java Source Code

/**
 * Copyright 2014 Zhenguo Jin (jinzhenguo1990@gmail.com)
 */* w w w  .  j a  va2s.co m*/
 * 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.worthed.util;

import android.app.Activity;
import android.content.res.Resources;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.TextView;

/**
 * Helper for finding and tweaking a view's children
 *
 * @author zhenguo
 */
public class ViewFinder {

    private static interface FindWrapper {

        View findViewById(int id);

        Resources getResources();
    }

    private static class WindowWrapper implements FindWrapper {

        private final Window window;

        WindowWrapper(final Window window) {
            this.window = window;
        }

        public View findViewById(final int id) {
            return window.findViewById(id);
        }

        public Resources getResources() {
            return window.getContext().getResources();
        }
    }

    private static class ViewWrapper implements FindWrapper {

        private final View view;

        ViewWrapper(final View view) {
            this.view = view;
        }

        public View findViewById(final int id) {
            return view.findViewById(id);
        }

        public Resources getResources() {
            return view.getResources();
        }
    }

    private final FindWrapper wrapper;

    /**
     * Create finder wrapping given view
     *
     * @param view
     */
    public ViewFinder(final View view) {
        wrapper = new ViewWrapper(view);
    }

    /**
     * Create finder wrapping given window
     *
     * @param window
     */
    public ViewFinder(final Window window) {
        wrapper = new WindowWrapper(window);
    }

    /**
     * Create finder wrapping given activity
     *
     * @param activity
     */
    public ViewFinder(final Activity activity) {
        this(activity.getWindow());
    }

    /**
     * Find view with id
     *
     * @param id
     * @return found view
     */
    @SuppressWarnings("unchecked")
    public <V extends View> V find(final int id) {
        return (V) wrapper.findViewById(id);
    }

    /**
     * Get image view with id
     *
     * @param id
     * @return image view
     */
    public ImageView imageView(final int id) {
        return find(id);
    }

    /**
     * Get compound button with id
     *
     * @param id
     * @return image view
     */
    public CompoundButton compoundButton(final int id) {
        return find(id);
    }

    /**
     * Get text view with id
     *
     * @param id
     * @return text view
     */
    public TextView textView(final int id) {
        return find(id);
    }

    /**
     * Set text of child view with given id
     *
     * @param id
     * @param content
     * @return text view
     */
    public TextView setText(final int id, final CharSequence content) {
        final TextView text = find(id);
        text.setText(content);
        return text;
    }

    /**
     * Set text of child view with given id
     *
     * @param id
     * @param content
     * @return text view
     */
    public TextView setText(final int id, final int content) {
        return setText(id, wrapper.getResources().getString(content));
    }

    /**
     * Register on click listener to child view with given id
     *
     * @param id
     * @param listener
     * @return view registered with listener
     */
    public View onClick(final int id, final OnClickListener listener) {
        View clickable = find(id);
        clickable.setOnClickListener(listener);
        return clickable;
    }

    /**
     * Register runnable to be invoked when child view with given id is clicked
     *
     * @param id
     * @param runnable
     * @return view registered with runnable
     */
    public View onClick(final int id, final Runnable runnable) {
        return onClick(id, new OnClickListener() {

            public void onClick(View v) {
                runnable.run();
            }
        });
    }

    /**
     * Register on click listener with all given child view ids
     *
     * @param ids
     * @param listener
     */
    public void onClick(final OnClickListener listener, final int... ids) {
        for (int id : ids)
            find(id).setOnClickListener(listener);
    }

    /**
     * Register runnable to be invoked when all given child view ids are clicked
     *
     * @param ids
     * @param runnable
     */
    public void onClick(final Runnable runnable, final int... ids) {
        onClick(new OnClickListener() {

            public void onClick(View v) {
                runnable.run();
            }
        }, ids);
    }

    /**
     * Set drawable on child image view
     *
     * @param id
     * @param drawable
     * @return image view
     */
    public ImageView setDrawable(final int id, final int drawable) {
        ImageView image = imageView(id);
        image.setImageDrawable(image.getResources().getDrawable(drawable));
        return image;
    }

    /**
     * Register on checked change listener to child view with given id
     *
     * @param id
     * @param listener
     * @return view registered with listener
     */
    public CompoundButton onCheck(final int id,
                                  final OnCheckedChangeListener listener) {
        CompoundButton checkable = find(id);
        checkable.setOnCheckedChangeListener(listener);
        return checkable;
    }

    /**
     * Register runnable to be invoked when child view with given id is
     * checked/unchecked
     *
     * @param id
     * @param runnable
     * @return view registered with runnable
     */
    public CompoundButton onCheck(final int id, final Runnable runnable) {
        return onCheck(id, new OnCheckedChangeListener() {

            public void onCheckedChanged(CompoundButton buttonView,
                                         boolean isChecked) {
                runnable.run();
            }
        });
    }

    /**
     * Register on checked change listener with all given child view ids
     *
     * @param ids
     * @param listener
     */
    public void onCheck(final OnCheckedChangeListener listener,
                        final int... ids) {
        for (int id : ids)
            compoundButton(id).setOnCheckedChangeListener(listener);
    }

    /**
     * Register runnable to be invoked when all given child view ids are
     * checked/unchecked
     *
     * @param ids
     * @param runnable
     */
    public void onCheck(final Runnable runnable, final int... ids) {
        onCheck(new OnCheckedChangeListener() {

            public void onCheckedChanged(CompoundButton buttonView,
                                         boolean isChecked) {
                runnable.run();
            }
        }, ids);
    }

}
Java Source Code List
