import android.app.Activity;import android.content.Context;import android.text.InputType;import android.util.DisplayMetrics;import android.view.MotionEvent;import android.view.inputmethod.InputMethodManager;import android.widget.EditText;/** * @name ViewHelper * @description 常用的系统控件操作，与业务相关 * @author max * @date 2012-12-11 *  */public class ViewHelper {    /**     * 取得屏幕尺寸 add by max [2013-1-21]     *      * @param activity     * @return     */    public static DisplayMetrics getDisplayMetrics(Activity activity) {        DisplayMetrics dm = new DisplayMetrics();        activity.getWindowManager().getDefaultDisplay().getMetrics(dm);        return dm;    }    /**     * 取得屏幕尺寸 add by max [2013-5-11]     *      * @param context     * @return     */    public static DisplayMetrics getDisplayMetrics(Context context) {        DisplayMetrics dm = context.getResources().getDisplayMetrics();        return dm;    }    /**     * 隐藏EditeText键盘 {@code} setOnTouchListener(new OnTouchListener() { public     * boolean onTouch(View v, MotionEvent event) { return true;     *      * @param et     *            EditeText     */    public static void hiddenKeyboard(EditText et, MotionEvent event) {        int inType = et.getInputType();        et.setInputType(InputType.TYPE_NULL);        et.onTouchEvent(event);        et.setInputType(inType);        et.setSelection(et.getText().length());    }    /**     * 打开键盘 add by max [2013-8-11]     */    public static void openKeyboard(final Context context) {        InputMethodManager imm = (InputMethodManager) context                .getSystemService(Context.INPUT_METHOD_SERVICE);        imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);    }    /**     * 关闭键盘 add by max [2013-7-2]     *      * @param context     * @param etInput     */    public static void closeKeyboard(Activity activity) {        InputMethodManager inputManager = (InputMethodManager) activity                .getSystemService(Context.INPUT_METHOD_SERVICE);        inputManager.hideSoftInputFromWindow(activity.getCurrentFocus()                .getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);    }    /**     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)     */    public static int dip2px(Context context, float dpValue) {        final float scale = context.getResources().getDisplayMetrics().density;        return (int) (dpValue * scale + 0.5f);    }    /**     * 根据手机的分辨率从 px(像素) 的单位 转成为 dp     */    public static int px2dip(Context context, float pxValue) {        final float scale = context.getResources().getDisplayMetrics().density;        return (int) (pxValue / scale + 0.5f);    }}