问题
I have an app where I want to be able to show a TextView (or EditText) that allows the user to select some text, then press a button to have something done with that text. Implementing this on Android versions prior to Honeycomb is no problem but on Honeycomb and above the default long-press action is to show an action bar with Copy/Cut/Paste options. I can intercept long-press to show my own action bar, but then I do not get the text selection handles displayed.
Once I have started my own ActionMode how do I get the text selection handles displayed?
Here is the code I\'m using to start the ActionMode, which works except there are no text selection handles displayed:
public boolean onLongClick(View v) {
if(actionMode == null)
actionMode = startActionMode(new QuoteCallback());
return true;
}
class QuoteCallback implements ActionMode.Callback {
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.quote, menu);
return true;
}
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
switch(item.getItemId()) {
case R.id.quote:
Log.d(TAG, \"Selected menu\");
mode.finish();
// here is where I would grab the selected text
return true;
}
return false;
}
public void onDestroyActionMode(ActionMode mode) {
actionMode = null;
}
}
回答1:
I figured out the answer to my own question; TextView (and therefore EditText) has a method setCustomSelectionActionModeCallback() which should be used instead of startActionMode(). Using this enables customisation of the menu used by TextView for text selection. Sample code:
bodyView.setCustomSelectionActionModeCallback(new StyleCallback());
where StyleCallback customises the text selection menu by removing Select All and adding some styling actions:
class StyleCallback implements ActionMode.Callback {
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
Log.d(TAG, "onCreateActionMode");
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.style, menu);
menu.removeItem(android.R.id.selectAll);
return true;
}
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
Log.d(TAG, String.format("onActionItemClicked item=%s/%d", item.toString(), item.getItemId()));
CharacterStyle cs;
int start = bodyView.getSelectionStart();
int end = bodyView.getSelectionEnd();
SpannableStringBuilder ssb = new SpannableStringBuilder(bodyView.getText());
switch(item.getItemId()) {
case R.id.bold:
cs = new StyleSpan(Typeface.BOLD);
ssb.setSpan(cs, start, end, 1);
bodyView.setText(ssb);
return true;
case R.id.italic:
cs = new StyleSpan(Typeface.ITALIC);
ssb.setSpan(cs, start, end, 1);
bodyView.setText(ssb);
return true;
case R.id.underline:
cs = new UnderlineSpan();
ssb.setSpan(cs, start, end, 1);
bodyView.setText(ssb);
return true;
}
return false;
}
public void onDestroyActionMode(ActionMode mode) {
}
}
The XML for the menu additions is:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/italic"
android:showAsAction="always"
android:icon="@drawable/italic"
android:title="Italic"/>
<item android:id="@+id/bold"
android:showAsAction="always"
android:icon="@drawable/bold"
android:title="Bold"/>
<item android:id="@+id/underline"
android:showAsAction="always"
android:icon="@drawable/underline"
android:title="Underline"/>
</menu>
回答2:
Above solution is good if you want to customize the options in action bar. But if you want to override action bar copy/Paste etc, below is the code...
public class MainActivity extends Activity {
EditText editText;
private ClipboardManager myClipboard;
private ClipData myClip;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myClipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
editText = (EditText) findViewById(R.id.editText3);
myClipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
editText = (EditText) findViewById(R.id.editText3);
editText.setCustomSelectionActionModeCallback(new Callback() {
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
// TODO Auto-generated method stub
}
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case android.R.id.copy:
int min = 0;
int max = editText.getText().length();
if (editText.isFocused()) {
final int selStart = editText.getSelectionStart();
final int selEnd = editText.getSelectionEnd();
min = Math.max(0, Math.min(selStart, selEnd));
max = Math.max(0, Math.max(selStart, selEnd));
}
// Perform your definition lookup with the selected text
final CharSequence selectedText = editText.getText()
.subSequence(min, max);
String text = selectedText.toString();
myClip = ClipData.newPlainText("text", text);
myClipboard.setPrimaryClip(myClip);
Toast.makeText(getApplicationContext(), "Text Copied",
Toast.LENGTH_SHORT).show();
// Finish and close the ActionMode
mode.finish();
return true;
case android.R.id.cut:
// add your custom code to get cut functionality according
// to your requirement
return true;
case android.R.id.paste:
// add your custom code to get paste functionality according
// to your requirement
return true;
default:
break;
}
return false;
}
});
}
}
回答3:
Easiest way to do it is to add a line in your main theme style which you have defined in your application tag of AndroidManifest. Open your theme style and add the following :
<item name="actionModeBackground">@color/your_color</item>
OR
<item name="android:actionModeBackground">@color/your_color</item>
For example: My theme style which I have defined:
<style name="AppTheme" parent="AppBaseTheme">
<item name="calendarViewStyle">@style/Widget.Holo.CalendarView</item>
<item name="android:actionBarStyle">@style/AppTheme1</item>
<!-- below is the line you have to add -->
<item name="android:actionModeBackground">@color/black_actionBar</item>
</style>
来源：https://stackoverflow.com/questions/12995439/custom-cut-copy-action-bar-for-edittext-that-shows-text-selection-handles