解决方法
我认为您正在寻找的是TextView.setCustomSelectionActionModeCallback.这将允许您在选择文本时创建自己的ActionMode.Callback.然后,您可以使用TextView.getSelectionStart和TextView.getSelectionEnd在选择MenuItem时检索所选文本.这是一个简单的例子：
mTextView.setCustomSelectionActionModeCallback(new Callback() {
@Override
public boolean onPrepareActionMode(ActionMode mode,Menu menu) {
// Remove the "select all" option
menu.removeItem(android.R.id.selectAll);
// Remove the "cut" option
menu.removeItem(android.R.id.cut);
// Remove the "copy all" option
menu.removeItem(android.R.id.copy);
return true;
}
@Override
public boolean onCreateActionMode(ActionMode mode,Menu menu) {
// Called when action mode is first created. The menu supplied
// will be used to generate action buttons for the action mode
// Here is an example MenuItem
menu.add(0,DEFINITION,"Definition").setIcon(R.drawable.ic_action_book);
return true;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
// Called when an action mode is about to be exited and
// destroyed
}
@Override
public boolean onActionItemClicked(ActionMode mode,MenuItem item) {
switch (item.getItemId()) {
case DEFINITION:
int min = 0;
int max = mTextView.getText().length();
if (mTextView.isFocused()) {
final int selStart = mTextView.getSelectionStart();
final int selEnd = mTextView.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 = mTextView.getText().subSequence(min,max);
// Finish and close the ActionMode
mode.finish();
return true;
default:
break;
}
return false;
}
});
结果
