android.view.inputmethod.InputConnection#getSelectedText ( )源码实例Demo

/**
 * @hide
 */
public void onExtractedSetSpan(Object span, int start, int end, int flags) {
    InputConnection conn = getCurrentInputConnection();
    if (conn != null) {
        if (!conn.setSelection(start, end)) return;
        CharSequence text = conn.getSelectedText(InputConnection.GET_TEXT_WITH_STYLES);
        if (text instanceof Spannable) {
            ((Spannable) text).setSpan(span, 0, text.length(), flags);
            conn.setComposingRegion(start, end);
            conn.commitText(text, 1);
        }
    }
}
 

private void updateStatus() {
    InputConnection ic = getCurrentIC();
    if (ic == null) {
        return;
    }
    CharSequence cs = ic.getSelectedText(0);
    boolean hasSelection = !TextUtils.isEmpty(cs);
    boolean hasClipData = ClipManager.getInstance().hasClipData();
    updateSelectAllStatus(hasSelection);
    updateCopyStatus(hasSelection);
    updatePasteStatus(hasClipData);
    updateDeleteStatus(hasSelection || !TextUtils.isEmpty(ic.getTextBeforeCursor(1, 0)));
}
 

/**
 * use ROT13 to scramble the contents of the editor
 */
private void scramble(InputConnection con) {
	char[] buffer = null;
	CharSequence selected = con.getSelectedText(0);
	if (selected != null) {
		buffer = selected.toString().toCharArray();
	}
	else {
		ExtractedText txt = con.getExtractedText(new ExtractedTextRequest(), 0);
		if (txt == null) {
			return;
		}
		buffer = txt.text.toString().toCharArray();
		if (buffer.length == 0)
			return;
	}
	// char[] buffer = con.getSelectedText(0).toString().toCharArray();
	// //con.getExtractedText(new
	// ExtractedTextRequest(),0).text.toString().toCharArray();
	for (int i = 0; i < buffer.length; i++) {
		if (buffer[i] >= 'a' && buffer[i] <= 'm')
			buffer[i] += 13;
		else if (buffer[i] >= 'A' && buffer[i] <= 'M')
			buffer[i] += 13;
		else if (buffer[i] >= 'n' && buffer[i] <= 'z')
			buffer[i] -= 13;
		else if (buffer[i] >= 'N' && buffer[i] <= 'Z')
			buffer[i] -= 13;
	}
	if (selected == null) {
		con.setComposingRegion(0, buffer.length);
	}
	con.setComposingText(new String(buffer), 1);
	con.finishComposingText();
}
 

private boolean hasSelection() {
    InputConnection ic = getInputConnection();
    CharSequence selection = ic.getSelectedText(0);
    return selection != null && selection.length() > 0;
}
 

@Override
public void onPress(int primaryCode) {
	// SEE: res/xml/keyboarddef.xml for the definitions.
	switch (primaryCode) {
		case 0: {
			InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
			imm.showInputMethodPicker();
			break;
		}
		case 1: {
			/*
			 * Intent intent = new Intent(this, SettingsActivity.class);
			 * intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			 * startActivity(intent);
			 */
			break;
		}
		case 2: {
			try {
				InputConnection con = getCurrentInputConnection();
				CharSequence txt = con.getSelectedText(0);
				if (txt == null) {
					txt = getCurrentInputConnection().getExtractedText(
							new ExtractedTextRequest(), 0).text;
				}
				TelnetEditorShell.self.showText(txt + "");
				Toast.makeText(this, R.string.msg_sent, Toast.LENGTH_SHORT).show();
			}
			catch (Exception exp) {
				Toast.makeText(this, R.string.err_noclient, Toast.LENGTH_SHORT)
						.show();
			}
			break;
		}
		case 3: {
			try {
				if (TelnetEditorShell.self != null) {
					TelnetEditorShell.self.disconnect();
					Toast.makeText(this, R.string.msg_client_disconnected,
							Toast.LENGTH_SHORT).show();
				}
				else {
					Toast.makeText(this, R.string.err_noclient, Toast.LENGTH_SHORT)
							.show();
				}
			}
			catch (Exception e) {

			}
		}
	}
}