从AccessibilityService粘贴工作在API22中在API17中不起作用
从AccessibilityService粘贴工作在API22中在API17中不起作用
提问于 2015-05-04 06:31:41
当我在API22上运行我的代码时，它工作得很好，将“测试测试”粘贴到启动AccessibilityEvent的应用程序中所需的EditText中。但是当我在API 17上运行它时，它不工作。它将数据复制到clip，但无法粘贴。我需要在API 16和更高版本上工作的机制。
这是我到目前为止的代码：
public class MyAccessibilityService extends AccessibilityService {
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
AccessibilityNodeInfo nodeInf = null;
AccessibilityNodeInfo nodeInfo = null;
final int eventType = event.getEventType();
String eventText = null;
switch(eventType) {
case AccessibilityEvent.TYPE_VIEW_CLICKED:
eventText = "Clicked: ";
nodeInf = this.getRootInActiveWindow();
Log.d("AccessibilityNodeInfo", ""+ nodeInf.getChildCount());
nodeInf.recycle();
break;
case AccessibilityEvent.TYPE_VIEW_FOCUSED:
AccessibilityRecordCompat record = AccessibilityEventCompat.asRecord(event);
AccessibilityNodeInfoCompat source = record.getSource();
ClipboardManager clipboard = (ClipboardManager) this.getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("label", "TESTING TESTING");
clipboard.setPrimaryClip(clip);
source.performAction(AccessibilityNodeInfoCompat.ACTION_PASTE);
//}
Log.d("AccessibilityNodeInfo", ""+ source.getClassName());
Intent intent = new Intent(MyAccessibilityService.this, TestActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
startActivity(intent);
break;
}
eventText = eventText + event.getText();
// Do something nifty with this text, like speak the composed string
// back to the user.
Log.d("Information", eventText);
Toast.makeText(getApplicationContext(), eventText + " " + android.os.Build.VERSION.SDK_INT,
Toast.LENGTH_LONG).show();
}
}回答 1
Stack Overflow用户
回答已采纳
发布于 2015-05-07 17:40:24
不幸的是，AccessibilityNodeInfo.ACTION_PASTE是在API18级中添加的，因此它不能与API17及更低版本一起工作。AccessibilityNodeInfoCompat只是现有特性的包装器，它不提供缺少特性的自定义实现。
v4支持库的源代码非常清楚：
在AccessibilityNodeInfoCompat中调用performAction时，支持库将调用IMPL.performAction [1]
public boolean performAction(int action) {
return IMPL.performAction(mInfo, action);
}当API级别为16和17 [2]时，IMPL为AccessibilityNodeInfoJellybeanImpl
if (Build.VERSION.SDK_INT >= 22) {
IMPL = new AccessibilityNodeInfoApi22Impl();
} else if (Build.VERSION.SDK_INT >= 21) {
IMPL = new AccessibilityNodeInfoApi21Impl();
} else if (Build.VERSION.SDK_INT >= 19) { // KitKat
IMPL = new AccessibilityNodeInfoKitKatImpl();
} else if (Build.VERSION.SDK_INT >= 18) { // JellyBean MR2
IMPL = new AccessibilityNodeInfoJellybeanMr2Impl();
} else if (Build.VERSION.SDK_INT >= 16) { // JellyBean
IMPL = new AccessibilityNodeInfoJellybeanImpl();
} else if (Build.VERSION.SDK_INT >= 14) { // ICS
IMPL = new AccessibilityNodeInfoIcsImpl();
} else {
IMPL = new AccessibilityNodeInfoStubImpl();
}这是AccessibilityNodeInfoJellybeanImpl [3]中的performAction
public static boolean performAction(Object info, int action, Bundle arguments) {
return ((AccessibilityNodeInfo) info).performAction(action, arguments);
}正如您所看到的，支持库调用标准android.view.accessibility.AccessibilityNodeInfo的performAction，所以如果系统不支持ACTION_PASTE，那么v4支持库也不支持ACTION_PASTE。
您可以使用以下代码检查是否支持ACTION_PASTE：
AccessibilityNodeInfoCompat source = record.getSource();
int supportedActions = source.getActions();
boolean isSupported = (supportedActions & AccessibilityNodeInfoCompat.ACTION_PASTE) == AccessibilityNodeInfoCompat.ACTION_PASTE;
Log.d(TAG, String.format("AccessibilityNodeInfoCompat.ACTION_PASTE %1$s supported", isSupported ? "is" : "is NOT"));页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/30020157
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