Java AccessibilityEvent.obtain方法代码示例

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
private void sendScrollAccessibilityEvent() {
    AccessibilityManager am =
            (AccessibilityManager) getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
    if (am.isEnabled()) {
        if (mCurrentPage != getNextPage()) {
            AccessibilityEvent ev =
                    AccessibilityEvent.obtain(AccessibilityEvent.TYPE_VIEW_SCROLLED);
            ev.setScrollable(true);
            ev.setScrollX(getScrollX());
            ev.setScrollY(getScrollY());
            ev.setMaxScrollX(mMaxScrollX);
            ev.setMaxScrollY(0);

            sendAccessibilityEventUnchecked(ev);
        }
    }
}
 

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
public void run() {
	synchronized (mAccessibilityLock) {
		if (mCodeMatcher == null) {
			mCodeMatcher = mControlCodes.matcher(mAccessibilityBuffer.toString());
		} else {
			mCodeMatcher.reset(mAccessibilityBuffer.toString());
		}

		// Strip all control codes out.
		mAccessibilityBuffer.setLength(0);
		while (mCodeMatcher.find()) {
			mCodeMatcher.appendReplacement(mAccessibilityBuffer, " ");
		}

		// Apply Backspaces using backspace character sequence
		int i = mAccessibilityBuffer.indexOf(BACKSPACE_CODE);
		while (i != -1) {
			mAccessibilityBuffer.replace(i == 0 ? 0 : i - 1,
					i + BACKSPACE_CODE.length(), "");
			i = mAccessibilityBuffer.indexOf(BACKSPACE_CODE);
		}

		if (mAccessibilityBuffer.length() > 0) {
			AccessibilityEvent event = AccessibilityEvent.obtain(
					AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED);
			event.setFromIndex(0);
			event.setAddedCount(mAccessibilityBuffer.length());
			event.getText().add(mAccessibilityBuffer);

			sendAccessibilityEventUnchecked(event);
			mAccessibilityBuffer.setLength(0);
		}
	}
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
public static void sendCustomAccessibilityEvent(View target, int type, String text) {
    AccessibilityManager accessibilityManager = (AccessibilityManager)
            target.getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
    if (accessibilityManager.isEnabled()) {
        AccessibilityEvent event = AccessibilityEvent.obtain(type);
        target.onInitializeAccessibilityEvent(event);
        event.getText().add(text);
        accessibilityManager.sendAccessibilityEvent(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
@Override
public boolean onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) {
    if (super.onRequestSendAccessibilityEvent(child, event)) {
        // Add a record for ourselves as well.
        AccessibilityEvent record = AccessibilityEvent.obtain();
        onInitializeAccessibilityEvent(record);
        // Populate with the text of the requesting child.
        child.dispatchPopulateAccessibilityEvent(record);
        event.appendRecord(record);
        return true;
    }
    return false;
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
private void sendAccessibilityEventForVirtualButton(int virtualViewId, int eventType,
                                                    String text) {
    //if (AccessibilityManager.getInstance(mContext).isEnabled()) {
    if (accessibilityManager != null && accessibilityManager.isEnabled()) {
        AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
        event.setClassName(Button.class.getName());
        event.setPackageName(getContext().getPackageName());
        event.getText().add(text);
        event.setEnabled(NumberPicker.this.isEnabled());
        AccessibilityRecordCompat.setSource(event, NumberPicker.this, virtualViewId);
        //event.setSource(NumberPicker.this, virtualViewId);
        requestSendAccessibilityEvent(NumberPicker.this, event);
    }
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
private void sendAccessibilityEventForVirtualButton(int virtualViewId, int eventType,
        String text) {
    if (((AccessibilityManager) getContext().getSystemService(Context.ACCESSIBILITY_SERVICE)).isEnabled()) {
        AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
        event.setClassName(Button.class.getName());
        event.setPackageName(getContext().getPackageName());
        event.getText().add(text);
        event.setEnabled(NumberPicker.this.isEnabled());
        event.setSource(NumberPicker.this, virtualViewId);
        requestSendAccessibilityEvent(NumberPicker.this, event);
    }
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
private void sendAccessibilityEventForVirtualButton(int virtualViewId, int eventType,
                                                    String text) {
    AccessibilityManager accessibilityManager = (AccessibilityManager) getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
    if (accessibilityManager.isEnabled()) {
        AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
        AccessibilityRecordCompat record = AccessibilityEventCompat.asRecord(event);
        event.setPackageName(getContext().getPackageName());
        record.setClassName(Button.class.getName());
        record.getText().add(text);
        record.setEnabled(isEnabled());
        record.setSource(mNumberPicker, virtualViewId);

        ViewParentCompat.requestSendAccessibilityEvent(mNumberPicker, mNumberPicker, event);
    }
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
@TargetApi(14)
public boolean onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) {
    if (!super.onRequestSendAccessibilityEvent(child, event)) {
        return false;
    }
    AccessibilityEvent record = AccessibilityEvent.obtain();
    onInitializeAccessibilityEvent(record);
    child.dispatchPopulateAccessibilityEvent(record);
    event.appendRecord(record);
    return true;
}
 

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
private void sendAccessibilityEventForVirtualText(int eventType) {
    //if (AccessibilityManager.getInstance(mContext).isEnabled()) {
    if (accessibilityManager != null && accessibilityManager.isEnabled()) {
        AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
        mInputText.onInitializeAccessibilityEvent(event);
        mInputText.onPopulateAccessibilityEvent(event);
        AccessibilityRecordCompat.setSource(event, NumberPicker.this, VIRTUAL_VIEW_ID_INPUT);
        // event.setSource(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT);
        requestSendAccessibilityEvent(NumberPicker.this, event);
    }
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
private AccessibilityEvent createEventForChild(int virtualViewId, int eventType) {
    AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
    event.setEnabled(true);
    event.setClassName(DEFAULT_CLASS_NAME);
    onPopulateEventForVirtualView(virtualViewId, event);
    if (event.getText().isEmpty() && event.getContentDescription() == null) {
        throw new RuntimeException("Callbacks must add text or a content description in populateEventForVirtualViewId()");
    }
    event.setPackageName(this.mView.getContext().getPackageName());
    AccessibilityEventCompat.asRecord(event).setSource(this.mView, virtualViewId);
    return event;
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
@TargetApi(14)
@Override
public boolean onRequestSendAccessibilityEvent( View child, AccessibilityEvent event ) {
	if ( super.onRequestSendAccessibilityEvent( child, event ) ) {
		// Add a record for ourselves as well.
		AccessibilityEvent record = AccessibilityEvent.obtain();
		onInitializeAccessibilityEvent( record );
		// Populate with the text of the requesting child.
		child.dispatchPopulateAccessibilityEvent( record );
		event.appendRecord( record );
		return true;
	}
	return false;
}
 

import android.view.accessibility.AccessibilityEvent; //导入方法依赖的package包/类
private void sendAccessibilityEventForVirtualText(int eventType) {
    if (((AccessibilityManager) getContext().getSystemService(Context.ACCESSIBILITY_SERVICE)).isEnabled()) {
        AccessibilityEvent event = AccessibilityEvent.obtain(eventType);
        mInputText.onInitializeAccessibilityEvent(event);
        mInputText.onPopulateAccessibilityEvent(event);
        event.setSource(NumberPicker.this, VIRTUAL_VIEW_ID_INPUT);
        requestSendAccessibilityEvent(NumberPicker.this, event);
    }
}