android虚拟键盘弹出遮挡登陆按钮问题的解决方法

privateLinearLayout logo_layout;

  privateImageView iv_logo;

  privateintsh;

  privateintlayoutH;

  @Override

  protectedvoidonCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    logo_layout=(LinearLayout) findViewById(R.id.logo_layout);

    iv_logo=(ImageView) findViewById(R.id.iv_logo);

    //获取屏幕的高度

    DisplayMetrics dm =newDisplayMetrics();

    WindowManager windowMgr = (WindowManager)getSystemService(Context.WINDOW_SERVICE);

    windowMgr.getDefaultDisplay().getMetrics(dm);

    sh = dm.heightPixels;

    logo_layout.getViewTreeObserver().addOnGlobalLayoutListener(newOnGlobalLayoutListener() {

      // 当layout执行结束后回调此方法

      @Override

      publicvoidonGlobalLayout() {

        logo_layout.getViewTreeObserver().removeGlobalOnLayoutListener(this);

        layoutH = logo_layout.getHeight();

      }

    });

    //当键盘弹起的时候用屏幕的高度减去布局的高度，同时获取到键盘的高度，用键盘的高度和剩余的高度做对比

    SoftKeyBoardListener.setListener(MainActivity.this,newOnSoftKeyBoardChangeListener() {

      @Override

      publicvoidkeyBoardShow(intheight) {

        //键盘弹起回调

        inth=sh-layoutH;

        if(h>height){//高度大于键盘的高度

          setLayoutH(80);

        }else{

          //高度小于键盘的高度

          intresetH=Math.abs(height+layoutH-sh);

          setLayoutH(resetH);

        }

      }

      @Override

      publicvoidkeyBoardHide(intheight) {

        //键盘隐藏回调

        setLayoutH(80);

      }

    });  

  }

  /**

   * 重新设置布局高度

   */

  privatevoidsetLayoutH(inth){

    LinearLayout.LayoutParams layoutParams = (android.widget.LinearLayout.LayoutParams) iv_logo.getLayoutParams();

    layoutParams.topMargin=dip2px(MainActivity.this, h);

    iv_logo.setLayoutParams(layoutParams);

  }

  /**

   * 根据手机的分辨率从 dp 的单位 转成为 px(像素)

   */

  publicstaticintdip2px(Context context,floatdpValue) {

    finalfloatscale =context.getResources().getDisplayMetrics().density;

    return(int) (dpValue * scale +0.5f);

  }

privateView rootView;//activity的根视图

  introotViewVisibleHeight;//纪录根视图的显示高度

  privateOnSoftKeyBoardChangeListener onSoftKeyBoardChangeListener;

  publicSoftKeyBoardListener(Activity activity) {

    //获取activity的根视图

    rootView = activity.getWindow().getDecorView();

    //监听视图树中全局布局发生改变或者视图树中的某个视图的可视状态发生改变

    rootView.getViewTreeObserver().addOnGlobalLayoutListener(newViewTreeObserver.OnGlobalLayoutListener() {

      @Override

      publicvoidonGlobalLayout() {

        //获取当前根视图在屏幕上显示的大小

        Rect r =newRect();

        rootView.getWindowVisibleDisplayFrame(r);

        intvisibleHeight = r.height();

        if(rootViewVisibleHeight ==0) {

          rootViewVisibleHeight = visibleHeight;

          return;

        }

        //根视图显示高度没有变化，可以看作软键盘显示／隐藏状态没有改变

        if(rootViewVisibleHeight == visibleHeight) {

          return;

        }

        //根视图显示高度变小超过200，可以看作软键盘显示了

        if(rootViewVisibleHeight - visibleHeight >200) {

          if(onSoftKeyBoardChangeListener !=null) {

            onSoftKeyBoardChangeListener.keyBoardShow(rootViewVisibleHeight - visibleHeight);

          }

          rootViewVisibleHeight = visibleHeight;

          return;

        }

        //根视图显示高度变大超过200，可以看作软键盘隐藏了

        if(visibleHeight - rootViewVisibleHeight >200) {

          if(onSoftKeyBoardChangeListener !=null) {

            onSoftKeyBoardChangeListener.keyBoardHide(visibleHeight - rootViewVisibleHeight);

          }

          rootViewVisibleHeight = visibleHeight;

          return;

        }

      }

    });

  }

privatevoidsetOnSoftKeyBoardChangeListener(OnSoftKeyBoardChangeListener onSoftKeyBoardChangeListener) {

    this.onSoftKeyBoardChangeListener = onSoftKeyBoardChangeListener;

  }

  publicinterfaceOnSoftKeyBoardChangeListener {

    voidkeyBoardShow(intheight);

    voidkeyBoardHide(intheight);

  }

  publicstaticvoidsetListener(Activity activity, OnSoftKeyBoardChangeListener onSoftKeyBoardChangeListener) {

    SoftKeyBoardListener softKeyBoardListener =newSoftKeyBoardListener(activity);

    softKeyBoardListener.setOnSoftKeyBoardChangeListener(onSoftKeyBoardChangeListener);

  }