登录界面软键盘遮挡登入按钮 空间

Posted 2022-12-04 童政通

如图效果

类似于QQ登入界面,软键盘弹出的时候,不遮挡登入按钮,整体的界面在软键盘之上

直接上干货

监听软键盘弹出及收起事件

步骤1。指定windowSoftInputMode =“adjustResize”

在androidManifest.xml中相应的Activity设置android：windowSoftInputMode =“adjustResize”，也可以在java代码中设置。

第2步。监听contentView宽高（布局）变化

使用这个帮助类

public class KeyBoardHelper 

    private Activity activity;
    private OnKeyBoardStatusChangeListener onKeyBoardStatusChangeListener;
    private int screenHeight;
    // 空白高度 = 屏幕高度 - 当前 Activity 的可见区域的高度
    // 当 blankHeight 不为 0 即为软键盘高度。
    private int blankHeight = 0;

    public KeyBoardHelper(Activity activity) 
        this.activity = activity;
        screenHeight = activity.getResources().getDisplayMetrics().heightPixels;
        activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
        if (activity.getRequestedOrientation() != ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) 
            activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        
    

    public void onCreate() 
        View content = activity.findViewById(android.R.id.content);
        // content.addOnLayoutChangeListener(listener); 这个方法有时会出现一些问题
        content.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);
    

    public void onDestory() 
        View content = activity.findViewById(android.R.id.content);
        content.getViewTreeObserver().removeOnGlobalLayoutListener(onGlobalLayoutListener);
    

    private OnGlobalLayoutListener onGlobalLayoutListener = new OnGlobalLayoutListener() 

        @Override
        public void onGlobalLayout() 
            Rect rect = new Rect();
            activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
            int newBlankheight = screenHeight - rect.bottom;
            if (newBlankheight != blankHeight) 
                if (newBlankheight > blankHeight) 
                    // keyboard pop
                    if (onKeyBoardStatusChangeListener != null) 
                        onKeyBoardStatusChangeListener.OnKeyBoardPop(newBlankheight);
                    
                 else  // newBlankheight < blankHeight
                    // keyboard close
                    if (onKeyBoardStatusChangeListener != null) 
                        onKeyBoardStatusChangeListener.OnKeyBoardClose(blankHeight);
                    
                
            
            blankHeight = newBlankheight;
        
    ;

    public void setOnKeyBoardStatusChangeListener(
            OnKeyBoardStatusChangeListener onKeyBoardStatusChangeListener) 
        this.onKeyBoardStatusChangeListener = onKeyBoardStatusChangeListener;
    

    public interface OnKeyBoardStatusChangeListener 

        void OnKeyBoardPop(int keyBoardheight);

        void OnKeyBoardClose(int oldKeyBoardheight);
    

具体的实现案例

xml布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/login_map"
    android:focusable="false"
    android:orientation="vertical">

    <LinearLayout
        android:id="@+id/layout_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="@dimen/padding_0"
            android:layout_marginTop="@dimen/padding_30"
            android:layout_weight="1"
            android:focusable="false">

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_margin="@dimen/padding_50"
                android:focusable="false"
                android:src="@drawable/login_welcome" />
        </LinearLayout>


        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="@dimen/padding_0"
            android:layout_weight="2"
            android:focusable="false"
            android:gravity="center"
            android:orientation="vertical">

            <EditText
                android:id="@+id/et_login_input"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="@dimen/padding_20"
                android:background="@drawable/dialog_box"
                android:hint="@string/login_input"
                android:paddingBottom="@dimen/padding_15"
                android:paddingLeft="@dimen/padding_20"
                android:paddingTop="@dimen/padding_15"
                android:singleLine="true"
                android:textColor="@color/bg_white"
                android:textColorHint="@color/bg_white" />

            <TextView
                android:id="@+id/tv_login"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="@dimen/padding_20"
                android:background="@drawable/login_button"
                android:focusable="false"
                android:gravity="center"
                android:padding="@dimen/padding_15"
                android:text="@string/login_text"
                android:textColor="@color/bg_white"
                android:textSize="@dimen/padding_20" />


        </LinearLayout>

        <TextView
            android:id="@+id/layout_bottom"
            android:layout_width="match_parent"
            android:layout_height="10dp"
            android:layout_alignParentBottom="true"
            android:text="" />
    </LinearLayout>

</RelativeLayout>

效果图

主要功能的代码(我这里是在fragment里面写的查找id省略)

//关键的代码
 @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) 
        View view = inflater.inflate(R.layout.fragment_login, container, false);
        initView(view);
        boardHelper = new KeyBoardHelper(getActivity());
        boardHelper.onCreate();
        boardHelper.setOnKeyBoardStatusChangeListener(onKeyBoardStatusChangeListener);
        layoutBottom.post(new Runnable() 
            @Override
            public void run() 
                bottomHeight = layoutBottom.getHeight();
            
        );
        return view;
    

    private KeyBoardHelper.OnKeyBoardStatusChangeListener onKeyBoardStatusChangeListener = new KeyBoardHelper.OnKeyBoardStatusChangeListener() 

        @Override
        public void OnKeyBoardPop(int keyBoardheight) 

            final int height = keyBoardheight;
            if (bottomHeight > height) 
                layoutBottom.setVisibility(View.GONE);
             else 
                int offset = bottomHeight - height;
                final ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) layoutContent
                        .getLayoutParams();
                lp.topMargin = offset;
                layoutContent.setLayoutParams(lp);
            

        

        @Override
        public void OnKeyBoardClose(int oldKeyBoardheight) 
            if (View.VISIBLE != layoutBottom.getVisibility()) 
                layoutBottom.setVisibility(View.VISIBLE);
            
            final ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) layoutContent
                    .getLayoutParams();
            if (lp.topMargin != 0) 
                lp.topMargin = 0;
                layoutContent.setLayoutParams(lp);
            

        
    ;

到此,问题搞定