本文整理汇总了Java中android.view.accessibility.AccessibilityRecord.getContentDescription方法的典型用法代码示例。如果您正苦于以下问题：Java AccessibilityRecord.getContentDescription方法的具体用法？Java AccessibilityRecord.getContentDescription怎么用？Java AccessibilityRecord.getContentDescription使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类android.view.accessibility.AccessibilityRecord的用法示例。
在下文中一共展示了AccessibilityRecord.getContentDescription方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: onAccessibilityEvent
import android.view.accessibility.AccessibilityRecord; //导入方法依赖的package包/类
/**
* Processes an AccessibilityEvent, by traversing the View's tree and
* putting together a message to speak to the user.
*/
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
if (!mTextToSpeechInitialized) {
Log.e(LOG_TAG, "Text-To-Speech engine not ready. Bailing out.");
return;
}
// This AccessibilityNodeInfo represents the view that fired the
// AccessibilityEvent. The following code will use it to traverse the
// view hierarchy, using this node as a starting point.
//
// NOTE: Every method that returns an AccessibilityNodeInfo may return null,
// because the explored window is in another process and the
// corresponding View might be gone by the time your request reaches the
// view hierarchy.
AccessibilityNodeInfo source = event.getSource();
if (source == null) {
return;
}
// Grab the parent of the view that fired the event.
AccessibilityNodeInfo rowNode = getListItemNodeInfo(source);
if (rowNode == null) {
return;
}
// Using this parent, get references to both child nodes, the label and the checkbox.
AccessibilityNodeInfo labelNode = rowNode.getChild(0);
if (labelNode == null) {
rowNode.recycle();
return;
}
AccessibilityNodeInfo completeNode = rowNode.getChild(1);
if (completeNode == null) {
rowNode.recycle();
return;
}
// Determine what the task is and whether or not it's complete, based on
// the text inside the label, and the state of the check-box.
if (rowNode.getChildCount() < 2 || !rowNode.getChild(1).isCheckable()) {
rowNode.recycle();
return;
}
CharSequence taskLabel = labelNode.getText();
final boolean isComplete = completeNode.isChecked();
String completeStr = null;
if (isComplete) {
completeStr = getString(R.string.task_complete);
} else {
completeStr = getString(R.string.task_not_complete);
}
String taskStr = getString(R.string.task_complete_template, taskLabel, completeStr);
StringBuilder utterance = new StringBuilder(taskStr);
// The custom ListView added extra context to the event by adding an
// AccessibilityRecord to it. Extract that from the event and read it.
final int records = event.getRecordCount();
for (int i = 0; i < records; i++) {
AccessibilityRecord record = event.getRecord(i);
CharSequence contentDescription = record.getContentDescription();
if (!TextUtils.isEmpty(contentDescription )) {
utterance.append(SEPARATOR);
utterance.append(contentDescription);
}
}
// Announce the utterance.
mTts.speak(utterance.toString(), TextToSpeech.QUEUE_FLUSH, null);
Log.d(LOG_TAG, utterance.toString());
}