在键盘存在时隐藏“底部导航栏” - Android

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【中文标题】在键盘存在时隐藏“底部导航栏” - Android【英文标题】:Hiding ‘Bottom Navigation Bar’ whilst keyboard is present - Android 【发布时间】:2017-08-24 05:45:09 【问题描述】:

我有一个小型演示聊天 UI 应用程序。此应用程序有一个底部导航栏。我需要在键盘出现时隐藏底部导航栏。

Here is an example of the chat UI

当您单击 EditText 元素时可以看到,键盘出现,但底部导航栏保持可见。我试过this measurement method之类的方法,但是UI元素闪烁like this。

当键盘可见时,是否有适当的方法隐藏底部导航栏?

编辑: 在下面的活动中,您可以看到我在哪里设置键盘侦听器以在确定键盘可见时调整 UI 元素的位置。

这是我的活动代码,使用上面链接中的 setKeyboardListener 方法并将其设置在 onCreateView 中:

package uk.cal.codename.projectnedry.TeamChatFragment;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.Rect;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.text.Layout;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.Window;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.Toast;

import com.roughike.bottombar.BottomBar;

import java.util.ArrayList;

import butterknife.BindView;
import butterknife.ButterKnife;
import uk.cal.codename.projectnedry.R;
import uk.cal.codename.projectnedry.TeamChatFragment.ListAdapter.TeamChatListAdapter;
import uk.demo.cal.genericmodelviewpresenter.GenericMvp.GenericMvpFragment;

import static android.view.View.GONE;

/**
 * A simple @link Fragment subclass.
 * Activities that contain this fragment must implement the
 * @link TeamChatView.OnFragmentInteractionListener interface
 * to handle interaction events.
 * Use the @link TeamChatView#newInstance factory method to
 * create an instance of this fragment.
 */
public class TeamChatView extends GenericMvpFragment implements TeamChatContract.RequiredViewOps 

    private OnFragmentInteractionListener mListener;
    @BindView(R.id.teamChatList)
    RecyclerView mTeamChatRecyclerView;
    @BindView(R.id.teamChatSendButton)
    ImageButton mTeamChatSendButton;
    @BindView(R.id.messageTextInput)
    EditText mMessageTextInput;
    TeamChatListAdapter mTeamChatListAdapter;
    TeamChatListAdapter.ClickListener mTeamChatListClickListener;
    private ArrayList<String> mTestMessageList;

    public interface OnKeyboardVisibilityListener 
        void onVisibilityChanged(boolean visible);
    

    public final void setKeyboardListener(final OnKeyboardVisibilityListener listener) 
        final View activityRootView = ((ViewGroup) getActivity().findViewById(android.R.id.content)).getChildAt(0);

        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() 

            private boolean wasOpened;

            private final int DefaultKeyboardDP = 100;

            // From @nathanielwolf answer...  Lollipop includes button bar in the root. Add height of button bar (48dp) to maxDiff
            private final int EstimatedKeyboardDP = DefaultKeyboardDP + (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? 48 : 0);

            private final Rect r = new Rect();

            @Override
            public void onGlobalLayout() 
                // Convert the dp to pixels.
                int estimatedKeyboardHeight = (int) TypedValue
                        .applyDimension(TypedValue.COMPLEX_UNIT_DIP, EstimatedKeyboardDP, activityRootView.getResources().getDisplayMetrics());

                // Conclude whether the keyboard is shown or not.
                activityRootView.getWindowVisibleDisplayFrame(r);
                int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
                boolean isShown = heightDiff >= estimatedKeyboardHeight;

                if (isShown == wasOpened) 
                    Log.d("Keyboard state", "Ignoring global layout change...");
                    return;
                

                wasOpened = isShown;
                listener.onVisibilityChanged(isShown);
            
        );
    

    public TeamChatView() 
        // Required empty public constructor
    

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @return A new instance of fragment TeamChatView.
     */
    public static TeamChatView newInstance() 
        TeamChatView fragment = new TeamChatView();
        Bundle args = new Bundle();
        fragment.setArguments(args);
        return fragment;
    

    @SuppressLint("MissingSuperCall")
    @Override
    public void onCreate(Bundle savedInstanceState) 
        super.onCreate(TeamChatPresenter.class, TeamChatModel.class, savedInstanceState);
    

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) 
        // Inflate the layout for this fragment
        final View view = inflater.inflate(R.layout.fragment_team_chat_view, container, false);
        this.mUnbinder = ButterKnife.bind(this, view);

        mTestMessageList = new ArrayList<>();
        this.mTeamChatListAdapter = new TeamChatListAdapter(mTestMessageList);
        this.mTeamChatRecyclerView.setAdapter(this.mTeamChatListAdapter);
        final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getContext());
        this.mTeamChatRecyclerView.setLayoutManager(linearLayoutManager);

        this.mTeamChatSendButton.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View view) 
                if(!String.valueOf(mMessageTextInput.getText()).equals("")) 
                    getSpecificImpOfGenericPresenter().sendMessage(String.valueOf(mMessageTextInput.getText()));
                    mMessageTextInput.setText("");
                    mTeamChatRecyclerView.smoothScrollToPosition(mTestMessageList.size());
                
            
        );

        setKeyboardListener(new OnKeyboardVisibilityListener()
            @Override
            public void onVisibilityChanged(boolean visible) 
                RelativeLayout contentFrame = (RelativeLayout) getActivity().findViewById(R.id.content_company_navigation);
                BottomBar lowerNavigationBar = (BottomBar) getActivity().findViewById(R.id.bottomBar);
                if (visible)  // if more than 100 pixels, its probably a keyboard...
                    lowerNavigationBar.setVisibility(GONE);
                    contentFrame.setPadding(0, 0, 0, 0);
                    mTeamChatRecyclerView.smoothScrollToPosition(mTestMessageList.size());
                 else 
                    contentFrame.setPadding(0, 0, 0, convertDpToPixel(60, getContext()));
                    mTeamChatRecyclerView.smoothScrollToPosition(mTestMessageList.size());
                    lowerNavigationBar.setVisibility(View.VISIBLE);
                
            
        );
        return view;
    

    /**
     * This method converts dp unit to equivalent pixels, depending on device density.
     *
     * @param dp A value in dp (density independent pixels) unit. Which we need to convert into pixels
     * @param context Context to get resources and device specific display metrics
     * @return A float value to represent px equivalent to dp depending on device density
     */
    public static int convertDpToPixel(float dp, Context context)
        Resources resources = context.getResources();
        DisplayMetrics metrics = resources.getDisplayMetrics();
        int px = (int) (dp * ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT));
        return px;
    

    public void addToTestMessageList(String str)
        this.mTestMessageList.add(str);
        this.mTeamChatListAdapter.notifyDataSetChanged();
    

    @Override
    public void onDestroyView() 
        super.onDestroyView();
       // getView().getViewTreeObserver().removeGlobalOnLayoutListener(test);
    

    @Override
    public TeamChatPresenter getSpecificImpOfGenericPresenter() 
        return (TeamChatPresenter) this.mPresenter;
    

这是我的 XML 布局:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_
    android:layout_
    android:orientation="vertical"
    tools:context="uk.cal.codename.projectnedry.TeamChatFragment.TeamChatView">

    <android.support.v7.widget.RecyclerView
        android:layout_above="@+id/chatViewMessageEntryLayout"
        android:id="@+id/teamChatList"
        android:layout_
        android:layout_
        android:layout_alignParentTop="true"
        android:isScrollContainer="false"
        android:paddingTop="10dp"
        android:scrollbars="vertical" />    

    <RelativeLayout
        android:id="@+id/chatViewMessageEntryLayout"
        android:layout_
        android:layout_
        android:layout_alignParentBottom="true"
        android:orientation="horizontal">

        <View
            android:id="@+id/chatViewMessageEntrySeperator"
            android:layout_
            android:layout_
            android:background="#e3e3e8" />

        <EditText
            android:id="@+id/messageTextInput"
            android:layout_
            android:layout_
            android:layout_gravity="center_vertical"
            android:layout_below="@+id/chatViewMessageEntrySeperator"
            android:layout_toLeftOf="@+id/teamChatSendButton"
            android:background="@android:color/transparent"
            android:hint="Enter message"
            android:inputType="textCapSentences|textMultiLine"
            android:maxLength="1000"
            android:maxLines="4"
            android:paddingLeft="10dp" />

        <ImageButton
            android:id="@+id/teamChatSendButton"
            android:layout_
            android:layout_
            android:layout_alignParentRight="true"
            android:layout_gravity="center"
            android:background="#00B9EF"
            android:src="@drawable/ic_send_white_24dp" />

    </RelativeLayout>

</RelativeLayout>

【问题讨论】:

在此处发布您的活动代码。 将您的活动或片段类与 xml 一起发布 你找到解决办法了吗……我也遇到了同样的问题 【参考方案1】:

最简单的实现,在

中添加AndroidManifest.xml
<activity android:windowSoftInputMode="adjustPan"/>

希望这可以帮助某人。享受吧!

【讨论】:

在这种模式下ToolBar正在滑出屏幕 当键盘出现时,“adjustPan”隐藏工具栏,“adjustResize”显示重叠的底部栏布局。有什么解决办法吗?【参考方案2】:

您只需像这样在清单中添加此代码..

 <activity android:name=".MainActivity"
        android:windowSoftInputMode="adjustPan">

这对我有用..快乐编码

【讨论】:

【参考方案3】:

我最终使用了高度测量方法,这似乎是this answer 中描述的软键盘检测的标准方法。但是,我使用了this library's 实现它,因为它仍然是相同的ViewTreeObserver.OnGlobalLayoutListener 方法,实现得很好,并且允许我从我的应用程序主代码库中抽象出代码。

当这个键盘可见性监听器被触发时,我会隐藏/显示底部导航栏(我已经解释过here)。

【讨论】:

这是最好的答案,因为在回收站视图中可能有一个 EditText(或包含 EditText 的子视图)。因此,您不想设置 adjustPan,因为在这种情况下,键盘可能会在回收站视图中覆盖您的内容。【参考方案4】:

将此行添加到您的ActivityFragmentonResume() 中。

getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING);

它对我有用。只需尝试一次。

【讨论】:

【参考方案5】:

只需将以下属性添加到您的 AndroidManifest.xml 文件中的每个活动。

<activity
    android:name=".MainActivity"
    android:windowSoftInputMode="stateAlwaysHidden|adjustPan" />

【讨论】:

如果您想为您的应用程序设置默认模式,请考虑在您的主题中使用属性&lt;item name="android:windowSoftInputMode"&gt;stateAlwaysHidden|adjustPan&lt;/item&gt;【参考方案6】:
 private boolean keyboardListenersAttached = false;
private ViewGroup rootLayout;


       @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) 
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_settings, container, false);


    rootLayout = (ViewGroup) view.findViewById(R.id.settings_layout);
    attachKeyboardListeners();

    return view;




    private ViewTreeObserver.OnGlobalLayoutListener keyboardLayoutListener = new 
    ViewTreeObserver.OnGlobalLayoutListener() 
    @Override
    public void onGlobalLayout() 
        int heightDiff = rootLayout.getRootView().getHeight() - 
        rootLayout.getHeight();
        if (getActivity() != null) 
            int contentViewTop = 
           getActivity().getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();
            LocalBroadcastManager broadcastManager = 
            LocalBroadcastManager.getInstance(getContext());
            Rect r = new Rect();
            rootLayout.getWindowVisibleDisplayFrame(r);
            int screenHeight = rootLayout.getRootView().getHeight();

            // r.bottom is the position above soft keypad or device button.
            // if keypad is shown, the r.bottom is smaller than that before.
            int keypadHeight = screenHeight - r.bottom;
            if (keypadHeight > screenHeight * 0.15) 
                onHideKeyboard();

                Intent intent = new Intent("KeyboardWillHide");
                broadcastManager.sendBroadcast(intent);
             else 
                int keyboardHeight = heightDiff - contentViewTop;
                onShowKeyboard(keyboardHeight);

                Intent intent = new Intent("KeyboardWillShow");
                intent.putExtra("KeyboardHeight", keyboardHeight);
                broadcastManager.sendBroadcast(intent);
            
        else 

        
    
;

protected void onShowKeyboard(int keyboardHeight) 
    System.out.println("keyboard is shown");
    dashboardActivity.bottomNavigationView.setVisibility(View.VISIBLE);
    dashboardActivity.fab.setVisibility(View.VISIBLE);


protected void onHideKeyboard() 
    System.out.println("keyboard is hide");
    dashboardActivity.bottomNavigationView.setVisibility(View.INVISIBLE);
    dashboardActivity.fab.setVisibility(View.INVISIBLE);


protected void attachKeyboardListeners() 
    if (keyboardListenersAttached) 
        return;
    

    rootLayout.getViewTreeObserver().addOnGlobalLayoutListener(keyboardLayoutListener);
    keyboardListenersAttached = true;

在Manifest.xml文件中添加

<activity
        android:name=".Activity.DashboardActivity"
        android:windowSoftInputMode="adjustResize"

         />

【讨论】:

【参考方案7】:

activity 标签内的清单中添加属性:android:windowSoftInputMode="adjustResize""

 <activity
        android:name=".YourActivity"
        android:windowSoftInputMode="adjustResize"/>

注意:我建议,您应该使用 NestedScrollView 作为父布局。

希望这会有所帮助。

【讨论】:

我已经尝试过了,它使我的操作栏与前 3 到 4 条消息一起从屏幕上消失 你试过去掉测量方法吗?您可以尝试评论以前有关此问题的代码。 对单个 RecycleView 使用 NestedScrollView 有什么意义?您可以包含一个父布局,您可以在其中在 NSV 中添加 RecycleView 和 RelativeLayout (chatViewMessageEntryLayout)。 我删除了 NSV,现在只有 RecycleView。 This is what it looks like with adjustPan,您可以看到操作栏消失了,我只看到了一半的 EditTest。 检查我更新的答案。请改用adjustResize。您应该将所有视图包装在一个滚动视图中,否则键盘将没有空间显示。【参考方案8】:

就我而言,我使用 DrawerLayout 作为父视图,其中包含一些布局内容和导航底部栏。 在 Manifest 文件中添加“android:windowSoftInputMode="adjustPan" 这个 TAG 和 Activity 并且工作正常。

【讨论】:

【参考方案9】:
<activity android:name=".Activities.OrderSceenWithOrder" 
   android:windowSoftInputMode="adjustPan"
    >
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

【讨论】:

【参考方案10】:

该解决方案适用于我,它也不会显示重叠的底部导航栏 只需将此行添加到您的活动中:

android:windowSoftInputMode="adjustResize|adjustPan"

【讨论】:

接受的答案解释了为什么在某些情况下对编辑控件使用“adjustResize|adjustPan”是不够的。【参考方案11】:

该答案可能对仍在寻找解决方案的人有所帮助。

Bottom Navigation bar moves up with keyboard

【讨论】:

虽然此链接可能会回答问题,但最好在此处包含答案的基本部分并提供链接以供参考。如果链接页面发生更改,仅链接答案可能会失效。 - From Review【参考方案12】:

主动监听 Keyboard(IME) 打开/关闭事件并相应地显示/隐藏底部导航。

我们可以利用WindowInsetsCompat API,让这项工作变得轻松。

第 1 步:确保您已迁移到 AndroidX

第 2 步:在您的 FragmentonCreateView 添加键盘(IME)事件的侦听器


ViewCompat.setOnApplyWindowInsetsListener(window.decorView.rootView)  _, insets ->
 
   //This lambda block will be called, every time keyboard is opened or closed

    
    val imeVisible = insets.isVisible(WindowInsetsCompat.Type.ime())
    if(imeVisible) 
     //Now show-hide bottom navigation accordingly 
     

    insets


这就是你所需要的?

有关窗口插图的更多信息,您可以深入了解article

注意:
早期检测键盘打开/关闭事件并非易事。 Android 开发者使用了所有类型的 hack 来实现这一点。但经过数十年的请求、祈祷和咆哮,谷歌终于想出了 WindowInsets API。谢谢你,谷歌??

【讨论】:

【参考方案13】:

在你的片段中添加这个 onResume()

@Override
public void onResume() 
    Objects.requireNonNull(getActivity()).getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING);
    super.onResume();

希望这对某人有所帮助!

【讨论】:

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