前言

縱觀APP這片海洋，支持無(wú)障礙模式的不是很多揖闸，網(wǎng)上可供參考的資料少之又少揍堕，只能依靠強(qiáng)大的Debug不斷嘗試，最后挖掘出一點(diǎn)精華封裝成工具類(lèi)供大家使用汤纸，納入知識(shí)庫(kù)衩茸。

public class BarrierfreeUtils {


    /**
     * 設(shè)置無(wú)障礙焦點(diǎn)
     * 若關(guān)閉，用戶(hù)控件將失去焦點(diǎn)贮泞，不會(huì)播報(bào)內(nèi)容
     * @param view  指定控件
     * @param focused true打開(kāi)楞慈，false關(guān)閉
     */
    public static void setAccessibilityFocusable(View view, boolean focused) {
        if (android.os.Build.VERSION.SDK_INT >= 16) {
            if (focused) {
                ViewCompat.setImportantForAccessibility(view, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
            } else {
                ViewCompat.setImportantForAccessibility(view, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_NO);
            }
        }
    }

    /**
     * 動(dòng)態(tài)設(shè)置指定控件的播報(bào)內(nèi)容
     * @param view 指定控件l
     * @param contentDesc 播報(bào)語(yǔ)音內(nèi)容
     */
    public static void setAccessibilityDesc(final View view, final String contentDesc) {
        if (android.os.Build.VERSION.SDK_INT >= 14) {
            view.setAccessibilityDelegate(new View.AccessibilityDelegate() {
                @Override
                public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) {
                    super.onInitializeAccessibilityNodeInfo(host, info);
                    if (contentDesc != null) {
                        info.setContentDescription(contentDesc);
                    }
                    info.setClassName(view.getClass().getName());
                }
            });
        }
    }

    /**
     * 定位指定控件播放語(yǔ)音內(nèi)容
     * @param view  指定控件
     */
    public static void obtainBlindModeFocusable(final View view) {
        view.postDelayed(new Runnable() {
            @Override
            public void run() {
                if (android.os.Build.VERSION.SDK_INT >= 15) {
                    view.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER);
                }
            }
        }, 100);
    }

    /**
     * 始終播報(bào)語(yǔ)音內(nèi)容，不用定位焦點(diǎn)
     * @param view
     * @param desc 描述內(nèi)容啃擦，將它放到event的getText()中囊蓝，然后請(qǐng)求View的父類(lèi)來(lái)發(fā)出事件
     * @desc ccessibilityEvent.TYPE_ANNOUNCEMENT是代表元素需要TalkBack服務(wù)來(lái)讀出描述內(nèi)容。
     */
    public static void setSuperclassFocusableDesc(final View view, final String desc) {
        view.postDelayed(new Runnable() {
            @Override
            public void run() {
                if(android.os.Build.VERSION.SDK_INT >= 16){
                    AccessibilityEvent event = AccessibilityEvent.obtain(AccessibilityEvent.TYPE_ANNOUNCEMENT);
                    event.setPackageName(view.getContext().getPackageName());
                    event.setClassName(view.getClass().getName());
                    event.setSource(view);
                    event.getText().add(desc);
                    view.getParent().requestSendAccessibilityEvent(view, event);
                }
            }
        }, 100);
    }

      /**
     * 經(jīng)試用無(wú)效令蛉， 還請(qǐng)大神賜教
     * @param view
     * @param desc
     */
    public static void setDialogUnbroadcast(final View view) {
        if (android.os.Build.VERSION.SDK_INT >= 15) {
            view.setAccessibilityDelegate(new View.AccessibilityDelegate() {

                @Override
                public void sendAccessibilityEvent(View host, int eventType) {
                    // 彈出Popup或dialog后聚霜，不自動(dòng)讀各項(xiàng)內(nèi)容
                    if (eventType != AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
                        super.sendAccessibilityEvent(host, eventType);
                    }
                }
            });
        }
    }
}

另外還可以通過(guò)延遲的方式，執(zhí)行播報(bào)的順序言询，例如：

delImg.setContentDescription("下載圖片");
        delImg.postDelayed(new Runnable() {
            @Override
            public void run() {
                delImg.setContentDescription("關(guān)閉頁(yè)面");
            }
        }, 2000);

參考好文：
http://geek.csdn.net/news/detail/93269
http://www.voidcn.com/article/p-raugqcll-rp.html