【自定义控件】EditText实现自动焦点（输入法的自动显示与隐藏）

效果

• EdiText默认不获取焦点，点击后进入输入模式，输入法弹出，获取焦点。
• 当输入完成后，输入法隐藏，EditText自动清除焦点。

实现

1、先解决EditText自动获取焦点的问题，在父布局内添加

 android:focusable="true"
 android:focusableInTouchMode="true"

2、编写自定义EditText

public class EditText_AutoFocus extends androidx.appcompat.widget.AppCompatEditText {
    
    

    OnEditCompleteListener mOnEditCompleteListener = null;
    EditText_AutoFocus     editText                = this;

    public EditText_AutoFocus(Context context) {
    
    
        super(context);
        init();
    }

    public EditText_AutoFocus(Context context, AttributeSet attrs) {
    
    
        super(context, attrs);
        init();
    }

    public EditText_AutoFocus(Context context, AttributeSet attrs, int defStyleAttr) {
    
    
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
    
    
        getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
    
    
            @Override
            public void onGlobalLayout() {
    
    
                Rect r = new Rect();
                getWindowVisibleDisplayFrame(r);
                if ((getRootView().getHeight() - (r.bottom)) < 20) {
    
    
                    //软键盘隐藏
                    if (isFocused()) {
    
    
                        if (mOnEditCompleteListener != null) {
    
    
                            mOnEditCompleteListener.onEditComplete(editText);
                        }
                        clearFocus();
                    }
                }
            }
        });
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
    
    
        //焦点发生变化
        if (mOnEditCompleteListener != null) {
    
    
            mOnEditCompleteListener.onEditComplete(editText);
        }
        super.onFocusChanged(focused, direction, previouslyFocusedRect);
    }

    @Override
    public void clearFocus() {
    
    
        if (mOnEditCompleteListener != null) {
    
    
            mOnEditCompleteListener.onEditComplete(editText);
        }
        super.clearFocus();
    }

    void setOnEditCompleteListener(OnEditCompleteListener onEditCompleteListener) {
    
    
        this.mOnEditCompleteListener = onEditCompleteListener;
    }

    interface OnEditCompleteListener {
    
    
        void onEditComplete(EditText_AutoFocus editText);
    }
}