Android : How to listen to longclick events in any text area in other applications?

I'm trying to develop an Android application that provides an extra option when pasting data anywhere.

I know how to capture data from the clipboard. I just need to know how to listen to longclick events in any text area in other applications such as browsers,facebook,twitter...etc so that my application would be triggered giving th开发者_JAVA技巧e user the option to paste the data on the clipboard after processing it, as an alternative to pasting it in the normal way.

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We've come a long way since you asked this question but there are actually 2 ways to do that:

1. call to to ClipboardManager.addPrimaryClipChangedListener() and sign up as a listener when a user copies text. can be found in the Documentation

2. Add the ACTION_PROCESS_TEXT Intent Filter so the user can pick a custom action you created/start your app. More can be found in this Blog Post

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You need to add an intent filter to the activity in question, like so:

        <activity android:name=".PostActivity">
            <intent-filter>
              <action android:name="android.intent.action.SEND" />
              <category android:name="android.intent.category.DEFAULT" />
              <data android:mimeType="text/plain" />
            </intent-filter>       
        </activity>

Then you just need to handle the data sent to you in the intent in your Activity

Uri data = getIntent().getData();
Bundle extras = getIntent().getExtras();
String messageText = "";
if (data != null) {
  messageText = data.toString();
} else if (extras != null) {
  messageText = extras.getString(Intent.EXTRA_TEXT);
}