package com.example.administrator.ximengjianyu.utils;

import android.app.Activity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;

/**
 * Created by xukai on 2017/1/11.
 * 该类是对于Edittext的一些操作吧
 */
public class EdittextUtils {

    public String TAG = "EdittextUtils";

    private static EdittextUtils mEditText;

    private EdittextUtils() {
    }
    private static void syncInit(){
        if (mEditText == null){
            mEditText = new EdittextUtils();
        }
    }
    public static EdittextUtils getEdittext(){
        if (mEditText == null){
            syncInit();
        }
        return mEditText;
    }

    /**
     * 创建方法，设置EditText的光标指向最后一位
     */
    public void makeEdittextToLast(EditText edittext){
        edittext.setCursorVisible(true);
        edittext.setSelection(edittext.getText().length());
    }

    /**
     * created by xukai:
     * 该方法用来清除editText的相关内容
     */
    public void clearEdittext(final EditText et, final ImageView iv) {
        String text = et.getText().toString();
        if (text == null) {//用户名为空，删除不可见
            iv.setVisibility(View.GONE);
        } else if (text.length() == 0) {  //不为空，长度=0，也不可见
            iv.setVisibility(View.GONE);
        } else if (text.length() > 0) {   //不为空，长度大于0
            iv.setVisibility(View.VISIBLE);
        }
        et.addTextChangedListener(new TextWatcher() {

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                if(et.getText().length()==0){
                    iv.setVisibility(View.GONE);
                    return;
                }
                iv.setVisibility(View.VISIBLE);    //设置清除内容图标可见
            }
        });
    }

    /**
     * EditText获取焦点并显示软键盘
     */
    public void showSoftInputFromWindow(Activity activity, EditText editText) {
        editText.setFocusable(true);
        editText.setFocusableInTouchMode(true);
        editText.requestFocus();
        InputUtils utils = new InputUtils();
        utils.showSoftInput(activity);
    }
}