update Accessibility Component Type - Android User Interface

Android examples for User Interface:AccessibilityEvent

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  3. User Interface
  4. AccessibilityEvent

Description

update Accessibility Component Type

Demo Code

/**/*from ww w  . ja  va2 s  .  com*/
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */
//package com.java2s;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;
import android.widget.Button;
import android.widget.RadioButton;

public class Main {
    private static final String BUTTON = "button";
    private static final String RADIOBUTTON_CHECKED = "radiobutton_checked";
    private static final String RADIOBUTTON_UNCHECKED = "radiobutton_unchecked";
    private static final View.AccessibilityDelegate BUTTON_DELEGATE = new View.AccessibilityDelegate() {
        @Override
        public void onInitializeAccessibilityEvent(View host,
                AccessibilityEvent event) {
            super.onInitializeAccessibilityEvent(host, event);
            event.setClassName(Button.class.getName());
        }

        @Override
        public void onInitializeAccessibilityNodeInfo(View host,
                AccessibilityNodeInfo info) {
            super.onInitializeAccessibilityNodeInfo(host, info);
            info.setClassName(Button.class.getName());
        }
    };
    private static final View.AccessibilityDelegate RADIOBUTTON_CHECKED_DELEGATE = new View.AccessibilityDelegate() {
        @Override
        public void onInitializeAccessibilityEvent(View host,
                AccessibilityEvent event) {
            super.onInitializeAccessibilityEvent(host, event);
            event.setClassName(RadioButton.class.getName());
            event.setChecked(true);
        }

        @Override
        public void onInitializeAccessibilityNodeInfo(View host,
                AccessibilityNodeInfo info) {
            super.onInitializeAccessibilityNodeInfo(host, info);
            info.setClassName(RadioButton.class.getName());
            info.setCheckable(true);
            info.setChecked(true);
        }
    };
    private static final View.AccessibilityDelegate RADIOBUTTON_UNCHECKED_DELEGATE = new View.AccessibilityDelegate() {
        @Override
        public void onInitializeAccessibilityEvent(View host,
                AccessibilityEvent event) {
            super.onInitializeAccessibilityEvent(host, event);
            event.setClassName(RadioButton.class.getName());
            event.setChecked(false);
        }

        @Override
        public void onInitializeAccessibilityNodeInfo(View host,
                AccessibilityNodeInfo info) {
            super.onInitializeAccessibilityNodeInfo(host, info);
            info.setClassName(RadioButton.class.getName());
            info.setCheckable(true);
            info.setChecked(false);
        }
    };

    public static void updateAccessibilityComponentType(View view,
            String componentType) {
        if (componentType == null) {
            view.setAccessibilityDelegate(null);
            return;
        }
        switch (componentType) {
        case BUTTON:
            view.setAccessibilityDelegate(BUTTON_DELEGATE);
            break;
        case RADIOBUTTON_CHECKED:
            view.setAccessibilityDelegate(RADIOBUTTON_CHECKED_DELEGATE);
            break;
        case RADIOBUTTON_UNCHECKED:
            view.setAccessibilityDelegate(RADIOBUTTON_UNCHECKED_DELEGATE);
            break;
        default:
            view.setAccessibilityDelegate(null);
            break;
        }
    }
}

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