onUserInteraction在DialogPreference中不起作用

Question

预计onUserInteraction正在为任何用户交互调用.它运作良好PreferenceActivity.但是,当a DialogPreference弹出时,onUserInteraction即使存在用户交互,例如触摸事件,也不再调用.

似乎 DialogPreference并非唯一的情况.无论何时Dialog显示,它都不会报告用户与活动的交互.

但如果我真的需要它,我该怎么办呢.谢谢.

Answer 1

这是 a 的完整解决方案DialogFragment，它onUserInteraction()在触摸时触发 Activity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()));
        }
    }
}

这是回调本身：

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);
    }
}

Answer 2

据我所知,onUserInteraction()当用户与对话框进行交互时,根本不会调用Activity它(甚至从您正在监视交互的开始).

我知道的两个解决方案是:

• 子类Dialog/ DialogPreference类和覆盖dispatchTouchEvent().

• 实现Window.Callback接口并Dialog通过发出以下命令将其设置为s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或以您自己的方式处理事件(例如,通过手动调用onUserInteraction())来处理所有收到的事件.

编辑

您有几种方法可以Activity从自定义PreferenceDialog实例中获取.

1. DialogPreference.getPreferenceManager()返回的调用方法PreferenceManager.它有一个getActivity()方法,但它是package-private,所以你必须把你的自定义DialogPreference放在android.preference包中才能访问它.

2. 在PreferenceActivity.onCreate()扩充首选项后,使用按键findPreference()查找自定义DialogPreference.然后将其转换为您的自定义类,并this通过访问器设置活动.

我会选择第二种选择.