android 针对一个界面有输入框时,点击空白处,隐藏键盘并且清除焦点

import android.content.Context;
import android.os.IBinder;
import android.view.MotionEvent;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

import com.co_insight.freshroad.BaseActivity;

/**
 * 点击空白处，隐藏数字键
 * Created by Administrator on 2016/6/15.
 */
public class HideInputActivity extends BaseActivity {

    /**
     * 获取点击事件
     */
    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
            View view = getCurrentFocus();
            if (isHideInput(view, ev)) {
                HideSoftInput(view.getWindowToken());
                view.clearFocus();
            }
        }
        return super.dispatchTouchEvent(ev);
    }

    /**
     * 判定是否需要隐藏
     */
    private boolean isHideInput(View v, MotionEvent ev) {
        if (v != null && (v instanceof EditText)) {
            int[] l = {0, 0};
            v.getLocationInWindow(l);
            int left = l[0], top = l[1], bottom = top + v.getHeight(), right = left + v.getWidth();
            if (ev.getX() > left && ev.getX() < right && ev.getY() > top && ev.getY() < bottom) {
                return false;
            } else {
                return true;
            }
        }
        return false;
    }

    /**
     * 隐藏软键盘
     */
    private void HideSoftInput(IBinder token) {
        if (token != null) {
            InputMethodManager manager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
            manager.hideSoftInputFromWindow(token, InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }

}