Android软键盘相关

1.判断软键盘的显示隐藏状态

mParentLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {


                @Override
                public void onGlobalLayout() {
                    Rect r = new Rect();
                    mParentLayout.getWindowVisibleDisplayFrame(r);
                    //r.top 是状态栏高度
                    int screenHeight = mParentLayout.getRootView().getHeight();
                    int softHeight = screenHeight - r.bottom;
                    RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) mAddImgLayout.getLayoutParams();
                    if (softHeight > 100) {//当输入法高度大于100判定为输入法打开了
                        layoutParams.setMargins(0, 0, 0, softHeight);
                        mAddImgLayout.setLayoutParams(layoutParams);
                        mDoneTv.setVisibility(View.VISIBLE);
                        mPickImglayout.setVisibility(View.INVISIBLE);
                    } else {//否则判断为输入法隐藏了
                        layoutParams.setMargins(0, 0, 0, 0);
                        mAddImgLayout.setLayoutParams(layoutParams);
                        mDoneTv.setVisibility(View.INVISIBLE);
                        mPickImglayout.setVisibility(View.VISIBLE);
                    }
                }
            });

2.手动显示隐藏软键盘

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(view,InputMethodManager.SHOW_FORCED);

imm.hideSoftInputFromWindow(view.getWindowToken(), 0); //强制隐藏键盘

3.弹出软键盘时，输入框置于软键盘的上面

android:windowSoftInputMode="adjustResize|stateHidden"

4.注意事项

获取软键盘的高度时需要考虑系统是否显示导航栏

4.1判断是否显示导航栏

//获取是否存在NavigationBarpublic static boolean checkDeviceHasNavigationBar(Context context) {    boolean hasNavigationBar = false;    Resources rs = context.getResources();    int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");    if (id > 0) {        hasNavigationBar = rs.getBoolean(id);    }    try {        Class systemPropertiesClass = Class.forName("android.os.SystemProperties");        Method m = systemPropertiesClass.getMethod("get", String.class);        String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");        if ("1".equals(navBarOverride)) {            hasNavigationBar = false;        } else if ("0".equals(navBarOverride)) {            hasNavigationBar = true;        }    } catch (Exception e) {    }    return hasNavigationBar;}

4.2 获取导航栏的高度

    public static int getVirtualBarHeight(Context context) {
        int vh = 0;
        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        Display display = windowManager.getDefaultDisplay();
        DisplayMetrics dm = new DisplayMetrics();
        try {
            @SuppressWarnings("rawtypes")
            Class c = Class.forName("android.view.Display");
            @SuppressWarnings("unchecked")
            Method method = c.getMethod("getRealMetrics", DisplayMetrics.class);
            method.invoke(display, dm);
            vh = dm.heightPixels - display.getHeight();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return vh;
    }