Android：EditText焦点触发布局隐藏以及显示

有的时候，我们想实现这种效果。就是当EditText是处在焦点状态的时候，把上部分的布局给隐藏掉。

当其不处在焦点状态，又全部显示。为了实现这种效果，我们需要进行如下处理：

首先，自定义个ImageView

public class ImageViewCareIME extends ImageView{
    ImeUiChangeListener mImeUiChangeListener;  
    private int mPreBottom = 0;  
    
    public ImageViewCareIME(Context context){  
        // TODO Auto-generated constructor stub  
        super(context);  
    }  

    public static interface ImeUiChangeListener{  
        public void onImeUiChange(int bottom);  
    }  
      
    public void setOnImeUiChangeListener(ImeUiChangeListener imeUiChangeListener){  
        mImeUiChangeListener = imeUiChangeListener;  
    }  
      
    @Override   
    protected void onDraw(Canvas canvas){  
        super.onDraw(canvas);  
          
        Rect r = new Rect();  
        if(getGlobalVisibleRect(r)){  
            
            if(r.bottom != mPreBottom){  
                mPreBottom = r.bottom;  
                  
                System.out.println("Change:   " + r.bottom);  
                if(null != mImeUiChangeListener)  
                    mImeUiChangeListener.onImeUiChange(r.bottom);  
                }  
            }  
        }  
}  

在Activity界面

        ImageViewCareIME imgTemp = new ImageViewCareIME(this);
        this.addContentView(imgTemp, new LayoutParams(LayoutParams.FILL_PARENT,
                LayoutParams.FILL_PARENT));
        DisplayMetrics dm = new DisplayMetrics();
        this.getWindowManager().getDefaultDisplay().getMetrics(dm);
        this.screenHeight = dm.heightPixels;
        imgTemp.setOnImeUiChangeListener(new ImageViewCareIME.ImeUiChangeListener() {

            @Override
            public void onImeUiChange(int bottom) {
                if (AppraiseActivity.this.screenHeight == bottom) {
                    editText.clearFocus();
                    layout.setVisibility(View.VISIBLE);
                } else {
                    editText.requestFocus();
                    editText.setFocusable(true);
                    layout.setVisibility(View.GONE);
                }
            }
        });

最后可能要在mainfest文件中把当前的Activity设置为

android:windowSoftInputMode="adjustResize|stateHidden"