Java AccessibilityEvent.setEventType方法代码示例

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
    boolean populated = false;
    if (event.getEventType() == 8) {
        event.setEventType(4);
    }
    View selectedView = getSelectedView();
    if (selectedView != null) {
        populated = selectedView.dispatchPopulateAccessibilityEvent(event);
    }
    if (!populated) {
        if (selectedView != null) {
            event.setEnabled(selectedView.isEnabled());
        }
        event.setItemCount(getCount());
        event.setCurrentItemIndex(getSelectedItemPosition());
    }
    return populated;
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
/**
 * Sends the specified text to the {@link AccessibilityManager} to be
 * spoken.
 *
 * @param view The source view.
 * @param text The text to speak.
 */
public void announceForAccessibility(final View view, final CharSequence text) {
    if (!mAccessibilityManager.isEnabled()) {
        Log.e(TAG, "Attempted to speak when accessibility was disabled!");
        return;
    }

    // The following is a hack to avoid using the heavy-weight TextToSpeech
    // class. Instead, we're just forcing a fake AccessibilityEvent into
    // the screen reader to make it speak.
    final AccessibilityEvent event = AccessibilityEvent.obtain();

    event.setPackageName(PACKAGE);
    event.setClassName(CLASS);
    event.setEventTime(SystemClock.uptimeMillis());
    event.setEnabled(true);
    event.getText().add(text);

    // Platforms starting at SDK version 16 (Build.VERSION_CODES.JELLY_BEAN) should use
    // announce events.
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        event.setEventType(AccessibilityEventCompat.TYPE_ANNOUNCEMENT);
    } else {
        event.setEventType(AccessibilityEvent.TYPE_VIEW_FOCUSED);
    }

    final ViewParent viewParent = view.getParent();
    if ((viewParent == null) || !(viewParent instanceof ViewGroup)) {
        Log.e(TAG, "Failed to obtain ViewParent in announceForAccessibility");
        return;
    }

    viewParent.requestSendAccessibilityEvent(view, event);
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
private void dispatchContentChangedIfNecessary() {
    final int flags = mEatenAccessibilityChangeFlags;
    mEatenAccessibilityChangeFlags = 0;
    if (flags != 0 && isAccessibilityEnabled()) {
        final AccessibilityEvent event = AccessibilityEvent.obtain();
        event.setEventType(AccessibilityEventCompat.TYPE_WINDOW_CONTENT_CHANGED);
        AccessibilityEventCompat.setContentChangeTypes(event, flags);
        sendAccessibilityEventUnchecked(event);
    }
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
private void dispatchContentChangedIfNecessary() {
    int flags = this.mEatenAccessibilityChangeFlags;
    this.mEatenAccessibilityChangeFlags = 0;
    if (flags != 0 && isAccessibilityEnabled()) {
        AccessibilityEvent event = AccessibilityEvent.obtain();
        event.setEventType(2048);
        AccessibilityEventCompat.setContentChangeTypes(event, flags);
        sendAccessibilityEventUnchecked(event);
    }
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
@Override
public boolean dispatchPopulateAccessibilityEvent(View v, AccessibilityEvent event) {
    //Send no event if the touch was inside Braille dots
    switch (v.getId()){
        case R.id.braille_dot_1:
        case R.id.braille_dot_2:
        case R.id.braille_dot_3:
        case R.id.braille_dot_4:
        case R.id.braille_dot_5:
        case R.id.braille_dot_6:
            event.setEventType(0); //Don't handle anything here!!
            break;
    }
    return true;
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
@Override
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
	boolean populated = false;
	// This is an exceptional case which occurs when a window gets the
	// focus and sends a focus event via its focused child to announce
	// current focus/selection. AdapterView fires selection but not focus
	// events so we change the event type here.
	if (event.getEventType() == AccessibilityEvent.TYPE_VIEW_FOCUSED) {
		event.setEventType(AccessibilityEvent.TYPE_VIEW_SELECTED);
	}
       
	// we send selection events only from AdapterView to avoid
	// generation of such event for each child
	View selectedView = getSelectedView();
	if (selectedView != null) {
		populated = selectedView.dispatchPopulateAccessibilityEvent(event);
	}
       
	if (!populated) {
		if (selectedView != null) {
			event.setEnabled(selectedView.isEnabled());
		}
		event.setItemCount(getCount());
		event.setCurrentItemIndex(getSelectedItemPosition());
	}
       
	return populated;
}