如何在激活SearchView时获得BackPressed()

Question

如何在

搜索模式下处理onBackPressed()？我已经在ActionBar实现了搜索，我想处理onBackPressed()。

编辑：

在MainActivity我已经添加了这个，但它只有在搜索关闭时才会收到通知

@Override
public void onBackPressed() {
    mMenu.findItem(R.id.menu_eye).setVisible(true);
    mMenu.findItem(R.id.menu_layers).setVisible(true);
    super.onBackPressed();  
};

我的搜索操作侦听器如下所示：

import com.cyrilmottier.polaris.PolarisMapView;
import android.app.SearchManager.OnCancelListener;
import android.content.Context;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.SearchView;
public class SearchListener implements SearchView.OnQueryTextListener, SearchView.OnCloseListener, SearchView.OnSuggestionListener, OnClickListener, OnCancelListener{
    private Context mContext;
    private PolarisMapView mMapView;
    private Menu mMenu;
    private SearchView mSearchView;
    public SearchListener(Context c, PolarisMapView mMapView, Menu mMenu, SearchView mSearchView){
        this.setmContext(c);
        this.setmMapView(mMapView);
        this.setmMenu(mMenu);
        this.mSearchView = mSearchView;
    }
    @Override
    public boolean onQueryTextChange(String newText) {
        return false;
    }
    @Override
    public boolean onQueryTextSubmit(String query) {
        if (Constants.searchPlaceNavigate(query, mContext, mMapView))
            return this.onClose();
        return false;
    }
    public Context getmContext() {
        return mContext;
    }
    public void setmContext(Context mContext) {
        this.mContext = mContext;
    }
    public PolarisMapView getmMapView() {
        return mMapView;
    }
    public void setmMapView(PolarisMapView mMapView) {
        this.mMapView = mMapView;
    }
    @Override
    public boolean onSuggestionClick(int position) {
        String p = mSearchView.getSuggestionsAdapter().getCursor().getString(position);
        if(position== 0)
            p = mSearchView.getSuggestionsAdapter().getCursor().getString(position*4+1);
        if(p != null)
            if(position== 0)
                Constants.searchPlaceNavigate(mSearchView.getSuggestionsAdapter().getCursor().getString(position*4+1), mContext, mMapView);
            else
                Constants.searchPlaceNavigate(mSearchView.getSuggestionsAdapter().getCursor().getString(position), mContext, mMapView);
        return this.onClose();
    }
    @Override
    public boolean onSuggestionSelect(int position) {
        return false;
    }
    @Override
    public boolean onClose() {
        mMenu.findItem(R.id.menu_eye).setVisible(true);
        mMenu.findItem(R.id.menu_layers).setVisible(true);
        mMenu.findItem(R.id.menu_search).collapseActionView();
        return true;
    }
    public Menu getmMenu() {
        return mMenu;
    }
    public void setmMenu(Menu mMenu) {
        this.mMenu = mMenu;
    }
    public SearchView getmSearchView() {
        return mSearchView;
    }
    public void setmSearchView(SearchView mSearchView) {
        this.mSearchView = mSearchView;
    }
    @Override
    public void onClick(View v) {
        this.onClose();
    }
    @Override
    public void onCancel() {
        this.onClose();
    }
}

Answer 1

另一种方法是在 MenuItem 上侦听 ActionExpand/Collapse ：

    MenuItem searchMenuItem = menu.findItem(R.id.menu_search);
    searchMenuItem.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {
        @Override
        public boolean onMenuItemActionExpand(MenuItem item) {
            // Do whatever you need
            return true; // KEEP IT TO TRUE OR IT DOESN'T OPEN !!
        }
        @Override
        public boolean onMenuItemActionCollapse(MenuItem item) {
            // Do whatever you need
            return true; // OR FALSE IF YOU DIDN'T WANT IT TO CLOSE!
        }
    });
    SearchView searchView = (SearchView) searchMenuItem.getActionView();
    ... // Keep doing as you do

我认为这种方式更干净，因为你直接听你想要的东西

感谢这个线程

Answer 2

为了支持较旧的设备，可以使用以下代码：

        MenuItemCompat.setOnActionExpandListener(searchItem,new MenuItemCompat.OnActionExpandListener() {
            @Override
            public boolean onMenuItemActionExpand(MenuItem item) {
                //Do whatever you want                   
                return true;
            }
            @Override
            public boolean onMenuItemActionCollapse(MenuItem item) {
                //Do whatever you want
                return true;
            }
        });

Answer 3

您可以扩展 SearchView 并覆盖 dispatchKeyEventPreIme：

   public class CustomSearchView 扩展 SearchView{        public CustomSearchView（final Context context） {            超级（上下文）;            this.setIconifiedByDefault（true）;        }        @Override        public boolean dispatchKeyEventPreIme（KeyEvent event） {            if （event.getKeyCode（） == KeyEvent.KEYCODE_BACK &&                event.getAction（） == KeyEvent.ACTION_UP） {                this.onActionViewCollapsed（）;            }            return super.dispatchKeyEventPreIme（event）;        }    }

Answer 4

与创建自定义搜索视图相同的答案，但带有侦听器

public class SearchViewer extends SearchView {
    private OnBackPressListener onBackPressListener;
    private boolean isKeyboardVisible;
        public SearchViewer(Context context) {
            super(context);
        }
        public SearchViewer(Context context, AttributeSet attrs) {
            super(context, attrs);
        }
        public SearchViewer(Context context, AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);
        }
        private void init() {
            KeyboardUtils.addKeyboardToggleListener((Activity) getContext(), new KeyboardUtils.SoftKeyboardToggleListener() {
                @Override
                public void onToggleSoftKeyboard(boolean isVisible) {
                    SearchViewer.this.isKeyboardVisible = isVisible;
                }
            });
        }
        @Override
        protected void onAttachedToWindow() {
            super.onAttachedToWindow();
            init();
        }
        @Override
        protected void onDetachedFromWindow() {
            super.onDetachedFromWindow();
            KeyboardUtils.removeAllKeyboardToggleListeners();
        }
        @Override
        public boolean dispatchKeyEventPreIme(KeyEvent event) {
            if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
                if (onBackPressListener != null && !isKeyboardVisible)
                    onBackPressListener.backPress();
            }
            return super.dispatchKeyEventPreIme(event);
        }
        public OnBackPressListener getOnBackPressListener() {
            return onBackPressListener;
        }
        public void setOnBackPressListener(OnBackPressListener onBackPressListener) {
            this.onBackPressListener = onBackPressListener;
        }
        public interface OnBackPressListener {
            void backPress();
        }
    }

键盘

可见性的 util 类，因此如果键盘可见背面按将隐藏它不会关闭活动

public class KeyboardUtils implements ViewTreeObserver.OnGlobalLayoutListener {
    private static HashMap<SoftKeyboardToggleListener, KeyboardUtils> sListenerMap = new HashMap<>();
    private SoftKeyboardToggleListener mCallback;
    private View mRootView;
    private float mScreenDensity = 1;
    private KeyboardUtils(Activity act, SoftKeyboardToggleListener listener) {
        mCallback = listener;
        mRootView = ((ViewGroup) act.findViewById(android.R.id.content)).getChildAt(0);
        mRootView.getViewTreeObserver().addOnGlobalLayoutListener(this);
        mScreenDensity = act.getResources().getDisplayMetrics().density;
    }
    public static void addKeyboardToggleListener(Activity act, SoftKeyboardToggleListener listener) {
        removeKeyboardToggleListener(listener);
        sListenerMap.put(listener, new KeyboardUtils(act, listener));
    }
    public static void removeKeyboardToggleListener(SoftKeyboardToggleListener listener) {
        if (sListenerMap.containsKey(listener)) {
            KeyboardUtils k = sListenerMap.get(listener);
            k.removeListener();
            sListenerMap.remove(listener);
        }
    }
    public static void removeAllKeyboardToggleListeners() {
        for (SoftKeyboardToggleListener l : sListenerMap.keySet())
            sListenerMap.get(l).removeListener();
        sListenerMap.clear();
    }
    @Override
    public void onGlobalLayout() {
        Rect r = new Rect();
        //r will be populated with the coordinates of your view that area still visible.
        mRootView.getWindowVisibleDisplayFrame(r);
        int heightDiff = mRootView.getRootView().getHeight() - (r.bottom - r.top);
        float dp = heightDiff / mScreenDensity;
        if (mCallback != null)
            mCallback.onToggleSoftKeyboard(dp > 200);
    }
    private void removeListener() {
        mCallback = null;
        mRootView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
    }
    public interface SoftKeyboardToggleListener {
        void onToggleSoftKeyboard(boolean isVisible);
    }
}

示例代码：

searchView.setOnBackPressListener(new SearchViewer.OnBackPressListener() {
    @Override
    public void backPress() {
        onBackPressed();
    }
});

Answer 5

我找到了答案，关键是阿里·伊姆兰先生和新世界的先前答案我必须覆盖此方法：

@Override
public void onActionViewCollapsed() {
    //do somethink
    super.onActionViewCollapsed();
}

每次关闭 searchView 时都会调用它，因此它可以处理后退按钮的情况。

Answer 6

您始终可以扩展任何视图并覆盖侦听方法，如下所示：

class MySearchView extends SearchView {
  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
     return super.onKeyDown(keyCode, event); //don't forget call this
  }
}

Answer 7

重写此方法可能会对您有所帮助

 @Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    // TODO Auto-generated method stub
    return super.onKeyDown(keyCode, event);
}

Answer 8

试试这个

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        MenuItem searchItem = menu.findItem(R.id.action_search);
        searchItem.setOnActionExpandListener(new MenuItem.OnActionExpandListener() {
        @Override
        public boolean onMenuItemActionExpand(MenuItem item) {
             //do something here
              return true;
        }
        @Override
        public boolean onMenuItemActionCollapse(MenuItem item) {
            //do something here
            
            //YourActivity is acitvity where you define searchview and fragment
            YourActivity.super.onBackPressed();  //remove fragment from backstack
            return true;
        }
    });
    //Any other code
}

当单击SearchView向上按钮或按返回按钮时，onMenuItemActionCollapse(MenuItem item)将运行。它将从后台堆栈中删除片段。

Answer 9

使用此代码处理onBackPressed()以转到以前的活动

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    switch (id){
        case android.R.id.home:
            onBackPressed();
            return true;
        default:
            return super.onOptionsItemSelected(item);
    }
}