在另一个应用程序中捕获文本选择

Question

我想使用android创建一个小部件，我需要捕获任何文本选择事件。例如，用户正在读取某事。并在另一个应用程序（网页浏览器，PDF阅读器，消息传递）中选择文本。

可以在后台捕捉任何文字选择吗？

Answer 1

尝试此操作从剪贴板中获取文本

     ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE); 
     clipboard.getText();

Set text and get text from clipboard

Answer 2

示例代码：

String textToPaste = null;

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

/* Returns true if there is currently a primary clip on the clipboard. */

if (clipboard.hasPrimaryClip()) {
    ClipData clip = clipboard.getPrimaryClip();

    // if you need text data only, then you have to check the MIME type for Text as i shown below :
    if (clip.getDescription().hasMimeType(MIMETYPE_TEXT_PLAIN))
        // WARNING: The item could cantain URI that points to the text data.
        // In this case the getText() returns null and this code fails!
        textToPaste = clip.getItemAt(0).getText().toString();

    // or you may coerce the data to the text representation: i have explained this in the second image.
    textToPaste = clip.getItemAt(0).coerceToText(this).toString();
}

if (!TextUtils.isEmpty(textToPaste))
     ((TextView)findViewById(R.id.etInput1)).setText(textToPaste);

欲了解更多信息，请查看官方链接

http://developer.android.com/reference/android/content/ClipData.html

http://developer.android.com/reference/android/content/ClipboardManager.html

Answer 3

1.您可以定义服务以在后台监听剪贴板事件

 ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
    clipboardManager.setPrimaryClip(new ClipboardManager.OnPrimaryClipChangedListener(){
        @Override
        public void onPrimaryClipChanged() {
            //TODO do your work

        }
    });

2.或者您可以使用AccessibilityService来检测复制文本事件，监听＆＃34; TYPE_VIEW_TEXT_SELECTION_CHANGED＆＃34;事件和从剪贴板读取数据，但您应引导用户在系统设置中为您的应用启用辅助功能切换。