键盘弹出遮挡按钮

下面方法只适应于没有设置全屏模式 。设置全屏模式则无效

方式一：简单 但是按钮一定要在最下方，局限性很大

    将layout的最外层用 RelativeLayout 
    将需要软键盘跟随的控件放置在RelativeLayout的底部
    让其他控件的位置根据这个控件来设置相对值
    android:windowSoftInputMode=“adjustResize”

方式二：外部套ScrollView

布局文件如下

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:id="@+id/sc_view"
    android:layout_height="match_parent"
    >
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <android.support.v7.widget.Toolbar
            android:layout_width="match_parent"
            android:background="#ff0000"
            android:title="标题"
            android:layout_height="55dp">

        </android.support.v7.widget.Toolbar>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:id="@+id/editText2"

      android:layout_marginTop="300dp"
        />

    <Button android:layout_width="fill_parent" android:layout_height="wrap_content"
        android:text="链接"
        android:layout_below="@+id/editText2"
        android:id="@+id/button_link"

        android:layout_weight="1"
        />

    </RelativeLayout>
</ScrollView>

代码如下

  scView = (ScrollView) findViewById(R.id.sc_view);
        EditText usernamelogin_username = (EditText) findViewById(R.id.editText2);
        usernamelogin_username.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                changeScrollView();

                return false;
            }
        });
         /**
     * 使ScrollView指向底部
     */
    private void changeScrollView() {
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                scView.scrollTo(0, scView.getHeight());
            }
        }, 300);
    }

方法三：设置全屏模式后 软键盘弹出 不仅按钮没被顶起 EditText 都不会顶起

main为 根据局 Id 和 scroll为遮挡按钮 Id

  public void addLayoutListener(final View main, final View scroll) {
        main.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                Rect rect = new Rect();
                main.getWindowVisibleDisplayFrame(rect);
                int mainInvisibleHeight = main.getRootView().getHeight() - rect.bottom;
                if (mainInvisibleHeight > 100) {
                    int[] location = new int[2];
                    scroll.getLocationInWindow(location);
                    int srollHeight = (location[1] + scroll.getHeight()) - rect.bottom;
                    main.scrollTo(0, srollHeight);
                } else {
                    main.scrollTo(0, 0);
                }
            }
        });
    }

如果 设置全屏模式后 软键盘弹出 仅为解决EditText 不会顶起的问题 则拷贝如下代码

/*
* 解决键盘遮住输入框
* */
public class AndroidBug5497Workaround {

    // For more information, see https://issuetracker.google.com/issues/36911528
    // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

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

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

    private AndroidBug5497Workaround(Activity activity) {
        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
                frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
            } else {
                // keyboard probably just became hidden
                frameLayoutParams.height = usableHeightSansKeyboard;
            }
            mChildOfContent.requestLayout();
            usableHeightPrevious = usableHeightNow;
        }
    }

    private int computeUsableHeight() {
        Rect r = new Rect();
        mChildOfContent.getWindowVisibleDisplayFrame(r);
        return (r.bottom - r.top);
    }
}