对于EditView软键盘的控制

package com.example.test_soft_input;

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

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    /*
     * 屏幕点击判断是否隐藏软键盘。
     * 
     * @see android.app.Activity#dispatchTouchEvent(android.view.MotionEvent)
     */
    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
            View v = getCurrentFocus();
            if (isShouldHideInput(v, ev)) {
                hideSoftInput(v.getWindowToken());
            }
        }
        return super.dispatchTouchEvent(ev);
    }

    /**
     * 判断是否需要隐藏键盘，若点击EditText之外的区域，则表示需要隐藏键盘
     * 
     * @param v
     * @param event
     * @return
     */
    public boolean isShouldHideInput(View v, MotionEvent event) {
        if (v != null && v instanceof EditText) {
            int[] location = { 0, 0 };
            v.getLocationInWindow(location);
            int left = location[0];
            int top = location[1];
            int bottom = top + v.getHeight();
            int right = left + v.getWidth();
            if (event.getX() > left && event.getX() < right
                    && event.getY() > top && event.getY() < bottom) {
                return false;
            } else {
                return true;
            }
        }
        return false;
    }

    /**
     * 隐藏软键盘
     * 
     * @param token
     */
    public void hideSoftInput(IBinder token) {
        if (token != null) {
            InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(token,
                    InputMethodManager.HIDE_NOT_ALWAYS);
        }

    }

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="请输入密码..." />

</RelativeLayout>