Android 剪切板相关

本篇文章简单介绍android中的ClipboardManager.

1:简介

ClipboardManager是android中用于管理剪切板一个类.它允许应用程序读取和写入剪切板数据,包括文本,图片等.

2: 获取实例

获取实例也很简单.如下:

ClipboardManager clipboardManager = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);

3: 获取剪切板内容

获取剪切板文本数据:

public static String getCopyText(Context context) {if (clipboardManager == null) {clipboardManager = (ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);}if (null == clipboardManager) return null;ClipData clipData = clipboardManager.getPrimaryClip();if (clipData != null && clipData.getItemCount() > 0) {return clipData.getItemAt(0).getText().toString();}return null;
}

getPrimaryClip()方法获取剪切板的当前内容,返回一个ClipData对象.

4: 设置剪切板内容

1. 设置剪切板文字:

   public static void setCopyText(Context context,String s) {try {if (clipboardManager == null) {clipboardManager = (ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);}if (null == clipboardManager) return;ClipData clipData = ClipData.newPlainText(null, s);clipboardManager.setPrimaryClip(clipData);} catch (Throwable e) {Log.e("xxxxx", "setCopyText: ", e);}}
   

5: 监听剪切板

 private ClipboardManager.OnPrimaryClipChangedListener clipChangedListener = () -> {ClipData clipData = clipboardManager.getPrimaryClip();String clipStr = "";if (clipData != null && clipData.getItemCount() > 0) {clipStr = clipData.getItemAt(0).getText().toString();}Log.i("xxxxx", "onPrimaryClipChanged: " + clipStr);};clipboardManager.addPrimaryClipChangedListener(clipChangedListener);

但是addPrimaryClipChangedListener只能监听当前应用程序剪切板内容的变化,无法监测其他应用,至于原因就是为了安全性和隐私.

6:移除监听

if (clipboardManager != null) {clipboardManager.removePrimaryClipChangedListener(clipChangedListener);
}