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;
}
});

}
}