andriod 剪贴板操作

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <EditText
        android:id="@+id/editcont"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10" >

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/setclipboard"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="设置剪贴板内容" />

    <Button
        android:id="@+id/getclipboard"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="获取剪贴板内容" />

</LinearLayout>  

package com.example.yanlei.wifi;

import android.content.ClipboardManager;
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private EditText editCont = null;
    private Button btnSet = null;
    private Button btnGet = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnSet = (Button) super.findViewById(R.id.setclipboard);
        btnGet = (Button) super.findViewById(R.id.getclipboard);
        editCont = (EditText) super.findViewById(R.id.editcont);

        //将文本框中内容放入剪贴板
        btnSet.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                String info = editCont.getText().toString();
                //获取剪贴板管理服务
                ClipboardManager clipboard = (ClipboardManager) MainActivity.this.getSystemService(Context.CLIPBOARD_SERVICE);
                //将文本数据复制到剪贴板
                clipboard.setText(info);
            }
        });

        //把剪贴板内容使用Toast显示出来
        btnGet.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                String info = "";
                //获取剪贴板管理服务
                ClipboardManager clipboard = (ClipboardManager) MainActivity.this.getSystemService(Context.CLIPBOARD_SERVICE);
                //从剪贴板读取内容
                info = clipboard.getText().toString();
                Toast.makeText(getApplicationContext(), info, Toast.LENGTH_LONG).show();
            }
        });

    }

}