android EditText禁止复制粘贴完整代码

<!-- 定义基础布局LinearLayout -->
<LinearLayout 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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical">
    <!-- 定义TextView控件 -->
    <EditText
        android:id="@+id/Et"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="禁止复制粘贴"
        android:longClickable="false"
        />
</LinearLayout>

package com.example.yanlei.yl2;

import android.content.ClipboardManager;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    EditText Et;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); // 调用父类的onCreate方法
        // 通过setContentView方法设置当前页面的布局文件为activity_main
        setContentView(R.layout.activity_main);
        Et=(EditText)findViewById(R.id.Et);
        Et.setCustomSelectionActionModeCallback(new ActionMode.Callback()
        {
            @Override
            public boolean onPrepareActionMode(ActionMode mode, Menu menu){
                return false;
            }
            @Override
            public void onDestroyActionMode(ActionMode mode){

            }
            @Override
            public boolean onCreateActionMode(ActionMode mode, Menu menu){
                return false;
            }

            @Override
            public boolean onActionItemClicked (ActionMode mode, MenuItem item){
                return false;
            }
        });

    }
}