安卓键盘调整大小

Question

我正在开发一个包含Activity和Fragment的应用程序。在Fragment布局中，我使用了相对布局作为父布局，在底部放置了一个按钮，并在滚动视图之间放置了ScrollView。 ScrollView 包含EditText框。如果我点击滚动视图中的最后一个editTextBox，我的键盘会隐藏fragment。 我已经尝试在清单文件和我的fragment中使用了adjustpan|adjustresize，但问题仍未解决。

- Surendran

---

你尝试过这个答案吗？ - Amit Vaghela

Answer 1

尝试在 AndroidMenifest 中执行此操作。

android:windowSoftInputMode="stateAlwaysHidden|adjustResize

在你的 editext 中使用这个。

android:inputType="textMultiLine|textPostalAddress"
android:scrollbars="vertical"

- Amit Vaghela

Answer 2

这里涉及到 Android 的一些 bug。经过长时间的努力，我终于想出了一个解决这个问题的顺畅方法。虽然只需要一行代码就能解决，但是需要满足一些前提条件。这一行代码如下：

AndroidBug5497Workaround.assistActivity(this, R.id.LayoutInScrollView);

你的 XML 布局必须像这样：

RelativeLayout{

 HeaderView{}

 ScrollView{
  LinearLayout{ 
    @+id/LayoutInScrollView
  }
 }

 FooterView{}      // the buttons u want to appear above keyboard
}

如果您未使用全屏模式，则以下类应足够：

class AndroidBug5497Workaround{

    View svChildLayout;
    int originalGravity;
    Activity activity;

    /**
     * @param activity
     * @param svChildLayoutId  id of the layout that is the first child of the center ScrollView
     */
    public static void assistActivity (Activity activity, int svChildLayoutId) {
        new AndroidBug5497Workaround(activity, svChildLayoutId);
    }


    private AndroidBug5497Workaround(Activity activity, int svChildLayoutId) {

        this.activity = activity;
        svChildLayout = activity.findViewById(svChildLayoutId);
        originalGravity = ((ScrollView.LayoutParams)svChildLayout.getLayoutParams()).gravity;

        //Add listener
        FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
        mChildOfContent = content.getChildAt(0);
        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            public void onGlobalLayout() {
                possiblyResizeChildOfContent2();
            }
        });

    }
    private void possiblyResizeChildOfContent2() {
        int usableHeightNow = computeUsableHeight();
        if (usableHeightNow != usableHeightPrevious) {
            int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
            int heightDifference = usableHeightSansKeyboard - usableHeightNow;
            if (heightDifference > (usableHeightSansKeyboard/4)) {
                // keyboard probably just became visible
                onKeyboardVisible();
            } else {
                // keyboard probably just became hidden
                onKeyboardHidden();
            }
            usableHeightPrevious = usableHeightNow;
        }
    }


    private void onKeyboardVisible() {

        ScrollView.LayoutParams params = (ScrollView.LayoutParams) svChildLayout.getLayoutParams();
        params.gravity = Gravity.TOP;
        svChildLayout.requestLayout();

        final ScrollView parentSv = (ScrollView) svChildLayout.getParent();
        parentSv.post(new Runnable() {
            @Override
            public void run() {
                View focusedEditText = activity.getWindow().getCurrentFocus();
                parentSv.smoothScrollTo(0, focusedEditText.getTop() );
            }
        });
    }

    private void onKeyboardHidden() {
        ScrollView.LayoutParams params = (ScrollView.LayoutParams) svChildLayout.getLayoutParams();
        params.gravity = originalGravity;
        svChildLayout.requestLayout();
    }
}

---

如果您正在使用全屏模式，则需要以下类（修改自{{link1：windowSoftInputMode="adjustResize" not working with translucent action/navbar}}）：

    public class AndroidBug5497Workaround {

        // For more information, see https://code.google.com/p/android/issues/detail?id=5497
        // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

        public static void assistActivity (Activity activity, int svChildLayoutId) {
            new AndroidBug5497Workaround(activity, svChildLayoutId);
        }

        private View mChildOfContent;
        private int usableHeightPrevious;
        private FrameLayout.LayoutParams frameLayoutParams;

        View svChildLayout;
        int originalGravity;
        Activity activity;

        private AndroidBug5497Workaround(Activity activity, int svChildLayoutId) {


        this.activity = activity;
        svChildLayout = activity.findViewById(svChildLayoutId);
        originalGravity = ((ScrollView.LayoutParams)svChildLayout.getLayoutParams()).gravity;

            FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
            mChildOfContent = content.getChildAt(0);
            mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                public void onGlobalLayout() {
                    possiblyResizeChildOfContent();
                }
            });
            frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
        }

        private void possiblyResizeChildOfContent() {
            int usableHeightNow = computeUsableHeight();
            if (usableHeightNow != usableHeightPrevious) {
                int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
                int heightDifference = usableHeightSansKeyboard - usableHeightNow;
                if (heightDifference > (usableHeightSansKeyboard/4)) {
                    // keyboard probably just became visible
onKeyboardVisible();                    
frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
                } else {
                    // keyboard probably just became hidden
onKeyboardHidden();                    
frameLayoutParams.height = usableHeightSansKeyboard;
                }
                mChildOfContent.requestLayout();
                usableHeightPrevious = usableHeightNow;
            }
        }

        private int computeUsableHeight() {


               Rect r = new Rect();
                mChildOfContent.getWindowVisibleDisplayFrame(r);
                return (r.bottom - r.top);
            }

private void onKeyboardVisible() {

        ScrollView.LayoutParams params = (ScrollView.LayoutParams) svChildLayout.getLayoutParams();
        params.gravity = Gravity.TOP;
        svChildLayout.requestLayout();

        final ScrollView parentSv = (ScrollView) svChildLayout.getParent();
        parentSv.post(new Runnable() {
            @Override
            public void run() {
                View focusedEditText = activity.getWindow().getCurrentFocus();
                parentSv.smoothScrollTo(0, focusedEditText.getTop() );
            }
        });
    }

    private void onKeyboardHidden() {
        ScrollView.LayoutParams params = (ScrollView.LayoutParams) svChildLayout.getLayoutParams();
        params.gravity = originalGravity;
        svChildLayout.requestLayout();
    }
    }

- M. Usman Khan

---

感谢您的回复。 - Surendran

@usman 不错的解决方案。我遇到了类似的问题，尝试使用类似的解决方法，但是它并不起作用。我也尝试了你自定义的非全屏活动解决方案，但它也没有生效。同时，我尝试了全屏版本，但会在键盘上方创建额外的白色空间。我已在[这里]（https://stackoverflow.com/questions/45328468/scrolling-in-scrollview-inside-a-fragment-in-viewpager-with-soft-keyboard-visibl）发布了更详细的问题。感谢您的帮助。谢谢。 - Poorya