预计会为任何用户交互调用onUserInteraction
。它在PreferenceActivity
中工作正常。但是,当弹出DialogPreference
时,即使存在用户交互(例如触摸事件),也不会再调用onUserInteraction
。
似乎DialogPreference
并非唯一的情况。每当显示Dialog
时,它都不会报告用户与活动的互动。
但如果我真的需要它,我该怎么办?谢谢。
答案 0 :(得分:6)
据我所知,当用户与对话框进行交互时,根本不会调用onUserInteraction()
(甚至从您正在监视交互的Activity
开始)。
我知道的两个解决方案是:
子类Dialog
/ DialogPreference
类并覆盖dispatchTouchEvent()
。
实现Window.Callback
接口并通过发出以下内容将其设置为Dialog
窗口回调:
dialog.getWindow().setCallback(callbackImplementation);
注意:此实现应通过调用适当的对话方法处理所有收到的事件,或以您自己的方式处理事件(例如,通过手动调用onUserInteraction()
)。
修改强>
您可以通过多种方式从自定义Activity
实例中获取PreferenceDialog
。
调用返回DialogPreference.getPreferenceManager()
的{{1}}方法。它有PreferenceManager
方法,但它是包私有,因此您必须将自定义getActivity()
放入DialogPreference
包中才能访问它。
在android.preference
中,在充实首选项后,使用PreferenceActivity.onCreate()
按键查找自定义findPreference()
。然后将其投放到自定义类,并通过访问者将活动设置为DialogPreference
。
我会选择第二种选择。
答案 1 :(得分:3)
以下是DialogFragment
的完整解决方案,触摸时触发Activity的onUserInteraction()
并保留默认回调的行为:
public abstract class BaseDialogFragment extends DialogFragment {
@Override
public void onActivityCreated(final Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
final Window window = getDialog().getWindow();
if (window != null) {
window.setCallback(new UserInteractionAwareCallback(window.getCallback(), getActivity()));
}
}
}
这是Callback本身:
public class UserInteractionAwareCallback implements Window.Callback {
private final Window.Callback originalCallback;
private final Activity activity;
public UserInteractionAwareCallback(final Window.Callback originalCallback, final Activity activity) {
this.originalCallback = originalCallback;
this.activity = activity;
}
@Override
public boolean dispatchKeyEvent(final KeyEvent event) {
return originalCallback.dispatchKeyEvent(event);
}
@Override
public boolean dispatchKeyShortcutEvent(final KeyEvent event) {
return originalCallback.dispatchKeyShortcutEvent(event);
}
@Override
public boolean dispatchTouchEvent(final MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
case MotionEvent.ACTION_UP:
if (activity != null) {
activity.onUserInteraction();
}
break;
default:
}
return originalCallback.dispatchTouchEvent(event);
}
@Override
public boolean dispatchTrackballEvent(final MotionEvent event) {
return originalCallback.dispatchTrackballEvent(event);
}
@Override
public boolean dispatchGenericMotionEvent(final MotionEvent event) {
return originalCallback.dispatchGenericMotionEvent(event);
}
@Override
public boolean dispatchPopulateAccessibilityEvent(final AccessibilityEvent event) {
return originalCallback.dispatchPopulateAccessibilityEvent(event);
}
@Nullable
@Override
public View onCreatePanelView(final int featureId) {
return originalCallback.onCreatePanelView(featureId);
}
@Override
public boolean onCreatePanelMenu(final int featureId, final Menu menu) {
return originalCallback.onCreatePanelMenu(featureId, menu);
}
@Override
public boolean onPreparePanel(final int featureId, final View view, final Menu menu) {
return originalCallback.onPreparePanel(featureId, view, menu);
}
@Override
public boolean onMenuOpened(final int featureId, final Menu menu) {
return originalCallback.onMenuOpened(featureId, menu);
}
@Override
public boolean onMenuItemSelected(final int featureId, final MenuItem item) {
return originalCallback.onMenuItemSelected(featureId, item);
}
@Override
public void onWindowAttributesChanged(final WindowManager.LayoutParams attrs) {
originalCallback.onWindowAttributesChanged(attrs);
}
@Override
public void onContentChanged() {
originalCallback.onContentChanged();
}
@Override
public void onWindowFocusChanged(final boolean hasFocus) {
originalCallback.onWindowFocusChanged(hasFocus);
}
@Override
public void onAttachedToWindow() {
originalCallback.onAttachedToWindow();
}
@Override
public void onDetachedFromWindow() {
originalCallback.onDetachedFromWindow();
}
@Override
public void onPanelClosed(final int featureId, final Menu menu) {
originalCallback.onPanelClosed(featureId, menu);
}
@Override
public boolean onSearchRequested() {
return originalCallback.onSearchRequested();
}
@TargetApi(Build.VERSION_CODES.M)
@Override
public boolean onSearchRequested(final SearchEvent searchEvent) {
return originalCallback.onSearchRequested(searchEvent);
}
@Nullable
@Override
public ActionMode onWindowStartingActionMode(final ActionMode.Callback callback) {
return originalCallback.onWindowStartingActionMode(callback);
}
@TargetApi(Build.VERSION_CODES.M)
@Nullable
@Override
public ActionMode onWindowStartingActionMode(final ActionMode.Callback callback, final int type) {
return originalCallback.onWindowStartingActionMode(callback, type);
}
@Override
public void onActionModeStarted(final ActionMode mode) {
originalCallback.onActionModeStarted(mode);
}
@Override
public void onActionModeFinished(final ActionMode mode) {
originalCallback.onActionModeFinished(mode);
}
}
答案 2 :(得分:0)
这是一个更独立、更完整的 Kotlin 实现:
/**
* Sets up the receiver's [window][Dialog.getWindow] to call [Activity.onUserInteraction]
* at appropriate times, mirroring the calls made in [Activity] itself.
* This method should be called immediately after [Dialog.show].
*/
fun Dialog.reportUserInteraction() {
window?.let { window ->
val activity = window.decorView.activity
val wrappedCallback = window.callback
window.callback = object : Window.Callback by wrappedCallback {
override fun dispatchGenericMotionEvent(event: MotionEvent): Boolean {
activity.onUserInteraction()
return wrappedCallback.dispatchGenericMotionEvent(event)
}
override fun dispatchKeyEvent(event: KeyEvent): Boolean {
activity.onUserInteraction()
return wrappedCallback.dispatchKeyEvent(event)
}
override fun dispatchKeyShortcutEvent(event: KeyEvent): Boolean {
activity.onUserInteraction()
return wrappedCallback.dispatchKeyShortcutEvent(event)
}
override fun dispatchTouchEvent(event: MotionEvent): Boolean {
if (event.action == ACTION_DOWN) activity.onUserInteraction()
return wrappedCallback.dispatchTouchEvent(event)
}
override fun dispatchTrackballEvent(event: MotionEvent): Boolean {
activity.onUserInteraction()
return wrappedCallback.dispatchTrackballEvent(event)
}
}
}
}
依赖:
val View.activity: Activity
get() = context.activityOrNull!!
val Context.activityOrNull: Activity?
get() {
var context = this
while (true) {
if (context is Application) {
return null
}
if (context is Activity) {
return context
}
if (context is ContextWrapper) {
val baseContext = context.baseContext
// Prevent Stack Overflow.
if (baseContext === this) {
return null
}
context = baseContext
} else {
return null
}
}
}