textview 复制粘贴

In this tutorial, we’ll implement the copy-paste feature on a TextView in our Android Application.
At the end of this article, you’d be able to copy a text to the Android System’s Clipboard and then paste that Clipboard data.

在本教程中，我们将在Android应用程序的TextView上实现复制粘贴功能。
在本文的结尾，您可以将文本复制到Android系统的剪贴板中，然后粘贴该剪贴板数据。

Andorid剪贴板–复制粘贴 (Andorid Clipboard – Copy Paste)

You must have noticed that EditText has a built in Clipboard Manager for Copy Paste functionality.
But a TextView doesn’t. So in order to allow Copy Pasting TextViews, we need to register the ContextMenu.

您必须已经注意到EditText具有内置的Clipboard Manager用于复制粘贴功能。
但是TextView却没有。 因此，为了允许复制粘贴TextView，我们需要注册ContextMenu。

Hence in order to receive the menu events, we need to registerForContextMenu.
Once this is done, you can long-press on the TextView to display the menu.

因此，为了接收菜单事件，我们需要registerForContextMenu 。
完成此操作后，您可以长按TextView以显示菜单。

But where’s the menu?

但是菜单在哪里？

The menu is created in the onCreateContextMenu() method.
The menu items actions are set in the onContextItemSelected method.

菜单是在onCreateContextMenu（）方法中创建的。
菜单项操作在onContextItemSelected方法中设置。

将文本复制到剪贴板 (Copying Text To Clipboard)

It’s easy to copy TextView text onto the Clipboard. You just need to set the ClipData type as newPlainText and pass the string.

将TextView文本复制到剪贴板很容易。 您只需要将ClipData类型设置为newPlainText并传递字符串即可。

Example:

例：

ClipboardManager manager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
ClipData clipData = ClipData.newPlainText("text", textView.getText());
manager.setPrimaryClip(clipData);

将文本粘贴到剪贴板 (Pasting Text To Clipboard)

Now that you have copied the text onto the Clipboard, just paste it using the following piece of code:

现在您已将文本复制到剪贴板上，只需使用以下代码将其粘贴：

ClipData pasteData = manager.getPrimaryClip();
ClipData.Item item = pasteData.getItemAt(0);
String paste = item.getText().toString();

Here we’re pasting the first data from the Clipboard. If we have multiple copied texts, they can be pasted using pasteData.getItemAt(1) and so on.

在这里，我们粘贴剪贴板中的第一个数据。 如果我们有多个复制的文本，则可以使用pasteData.getItemAt(1)进行粘贴，依此类推。

Now let’s jump onto the implementation part of this article.
In the next section, we’ll be developing a simple Android Application in which you can copy-paste text from one TextView to another.

现在，让我们跳到本文的实现部分。
在下一节中，我们将开发一个简单的Android应用程序，您可以在其中将文本从一个TextView复制粘贴到另一个。

项目结构 (Project Structure)

Android Textview Copy Paste Project Structure

Android Textview复制粘贴项目结构

码 (Code)

The code for the activity_main.xml layout is given below:

下面给出了activity_main.xml布局的代码：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="https://schemas.android.com/apk/res/android"xmlns:app="https://schemas.android.com/apk/res-auto"xmlns:tools="https://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><TextViewandroid:id="@+id/tvCopy"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="Welcome To Journaldev.com"android:padding="8dp"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintLeft_toLeftOf="parent"app:layout_constraintRight_toRightOf="parent"app:layout_constraintTop_toTopOf="parent" /><TextViewandroid:id="@+id/tvPaste"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="Paste here"android:padding="8dp"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintLeft_toLeftOf="parent"app:layout_constraintRight_toRightOf="parent"app:layout_constraintTop_toBottomOf="@+id/tvCopy" /></androidx.constraintlayout.widget.ConstraintLayout>

The code for the MainActivity.java class is given below:

MainActivity.java类的代码如下：

package com.journaldev.androidtextviewcopypaste;import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;import android.content.ClipData;
import android.content.ClipboardManager;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;public class MainActivity extends AppCompatActivity {TextView tvCopy, tvPaste;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tvCopy = findViewById(R.id.tvCopy);tvPaste = findViewById(R.id.tvPaste);registerForContextMenu(tvCopy);registerForContextMenu(tvPaste);}@Overridepublic void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {super.onCreateContextMenu(menu, v, menuInfo);menu.setHeaderTitle("Options");switch (v.getId()) {case R.id.tvCopy:menu.add(0, v.getId(), 0, "Copy");TextView textView = (TextView) v;ClipboardManager manager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);ClipData clipData = ClipData.newPlainText("text", textView.getText());if (manager != null) {manager.setPrimaryClip(clipData);}break;case R.id.tvPaste:menu.add(0, v.getId(), 0, "Paste");break;}}@Overridepublic boolean onContextItemSelected(@NonNull MenuItem item) {switch (item.getItemId()) {case R.id.tvCopy:Toast.makeText(getApplicationContext(), "Copy Clicked", Toast.LENGTH_LONG).show();break;case R.id.tvPaste:ClipboardManager manager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);if (manager != null && manager.getPrimaryClip() != null && manager.getPrimaryClip().getItemCount() > 0) {tvPaste.setText(manager.getPrimaryClip().getItemAt(0).getText().toString());}break;}return super.onContextItemSelected(item);}
}

getItemCount() is used to get the items present in the clipboard.
You can also set the clipboard data to be copied in the onContextItemSelected copy menu item action.

getItemCount()用于获取剪贴板中存在的项目。
您还可以在onContextItemSelected复制菜单项操作中设置要复制的剪贴板数据。

输出量 (Output)

The output of the above application in action is given below:

上面应用程序的输出如下：

Android Textview Copy Paste Output

Android Textview复制粘贴输出

That sums up this tutorial. Can you add a Cut Menu option? Post your code snippets in the comment sections!

总结了本教程。 您可以添加剪切菜单选项吗？ 在注释部分中发布您的代码段！

下载链接 (Download Links)

You can do ahead and download the full source code from the link below or visit our Github Repository.

您可以继续并从下面的链接下载完整的源代码，或者访问我们的Github存储库。

翻译自: https://www.journaldev.com/33255/android-textview-copy-paste-using-clipboard

textview 复制粘贴