[Source code] App tạo bàn phím ảo trên android

Bài này của 1 bạn có nick name là Kill ở 1 diễn đàn viết. Sợ quên nên mình copy về blog đọc sau vậy. Bài viết khá là hay và công sức của bạn ấy.

Ý tưởng : tạo ra 1 bàn phím có chức năng đơn giản như hình sau :

Bạn cần copy những resource cần thiết vào project của bạn làm

copy từ \android\platforms\<platform> vào thư mục \data\res\ 
(Nếu khó tìm bạn có thể download project của mình dưới bài viết)

Trong file layout của bạn, bạn cần add keyboard vào: /res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <Button android:id="@+id/button" android:background="@drawable/sym_keyboard_done" android:layout_height="fill_parent" android:layout_width="fill_parent" /> <LinearLayout android:layout_height="wrap_content" android:layout_width="wrap_content"> <android.inputmethodservice.KeyboardView android:id="@+id/keyboardView" android:visibility="gone" android:focusable="true" android:focusableInTouchMode="true" android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_weight="0" /> </LinearLayout> </FrameLayout>

Tạo một file define cho bàn phím: /res/xml/qwerty.xml

<?xml version="1.0" encoding="utf-8"?> <!-- /** * * Copyright 2008, The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ --> <Keyboard xmlns:android="http://schemas.android.com/apk/res/android" android:keyWidth="10%p" android:horizontalGap="0px" android:verticalGap="0px"> <Row> <Key android:codes="113" android:keyLabel="q" android:keyEdgeFlags="left"/> <Key android:codes="119" android:keyLabel="w"/> <Key android:codes="101" android:keyLabel="e"/> <Key android:codes="114" android:keyLabel="r"/> <Key android:codes="116" android:keyLabel="t"/> <Key android:codes="121" android:keyLabel="y"/> <Key android:codes="117" android:keyLabel="u"/> <Key android:codes="105" android:keyLabel="i"/> <Key android:codes="111" android:keyLabel="o"/> <Key android:codes="112" android:keyLabel="p" android:keyEdgeFlags="right"/> </Row> <Row> <Key android:codes="97" android:keyLabel="a" android:horizontalGap="5%p" android:keyEdgeFlags="left"/> <Key android:codes="115" android:keyLabel="s"/> <Key android:codes="100" android:keyLabel="d"/> <Key android:codes="102" android:keyLabel="f"/> <Key android:codes="103" android:keyLabel="g"/> <Key android:codes="104" android:keyLabel="h"/> <Key android:codes="106" android:keyLabel="j"/> <Key android:codes="107" android:keyLabel="k"/> <Key android:codes="108" android:keyLabel="l" android:keyEdgeFlags="right"/> </Row> <Row> <Key android:codes="-1" android:keyIcon="@drawable/sym_keyboard_shift" android:keyWidth="15%p" android:isModifier="true" android:isSticky="true" android:keyEdgeFlags="left"/> <Key android:codes="122" android:keyLabel="z"/> <Key android:codes="120" android:keyLabel="x"/> <Key android:codes="99" android:keyLabel="c"/> <Key android:codes="118" android:keyLabel="v"/> <Key android:codes="98" android:keyLabel="b"/> <Key android:codes="110" android:keyLabel="n"/> <Key android:codes="109" android:keyLabel="m"/> <Key android:codes="-5" android:keyIcon="@drawable/sym_keyboard_delete" android:keyWidth="15%p" android:keyEdgeFlags="right" android:isRepeatable="true"/> </Row> <Row android:rowEdgeFlags="bottom"> <Key android:codes="-3" android:keyIcon="@drawable/sym_keyboard_done" android:keyWidth="20%p" android:keyEdgeFlags="left"/> <Key android:codes="-2" android:keyLabel="123" android:keyWidth="15%p"/> <Key android:codes="32" android:keyIcon="@drawable/sym_keyboard_space" android:keyWidth="30%p" android:isRepeatable="true"/> <Key android:codes="46,44" android:keyLabel=". ," android:keyWidth="15%p"/> <Key android:codes="10" android:keyIcon="@drawable/sym_keyboard_return" android:keyWidth="20%p" android:keyEdgeFlags="right"/> </Row> </Keyboard> 

Trong lớp activity của bạn có thể dùng như sau: 

package myApp.DemoKey; import android.app.Activity; import android.inputmethodservice.Keyboard; import android.inputmethodservice.KeyboardView; import android.inputmethodservice.KeyboardView.OnKeyboardActionListener; import android.os.Bundle; import android.util.Log; import android.view.KeyEvent; import android.view.View; import android.view.View.OnClickListener; import android.view.View.OnKeyListener; public class DemoKey extends Activity implements OnKeyListener, OnKeyboardActionListener { private static final String TAG = DemoKey.class.getName(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); KeyboardView keyboardView = (KeyboardView) findViewById(R.id.keyboardView); Keyboard keyboard = new Keyboard(this, R.xml.qwerty); keyboardView.setKeyboard(keyboard); keyboardView.setEnabled(true); keyboardView.setPreviewEnabled(true); keyboardView.setOnKeyListener(this); keyboardView.setOnKeyboardActionListener(this); View button = findViewById(R.id.button); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { toggleKeyboardVisibility(); } }); } private void toggleKeyboardVisibility() { KeyboardView keyboardView = (KeyboardView) findViewById(R.id.keyboardView); int visibility = keyboardView.getVisibility(); switch (visibility) { case View.VISIBLE: keyboardView.setVisibility(View.INVISIBLE); break; case View.GONE: case View.INVISIBLE: keyboardView.setVisibility(View.VISIBLE); break; } } @Override public void swipeUp() { Log.d(TAG, "swipeUp"); } @Override public void swipeRight() { Log.d(TAG, "swipeRight"); } @Override public void swipeLeft() { Log.d(TAG, "swipeLeft"); } @Override public void swipeDown() { Log.d(TAG, "swipeDown"); } @Override public void onText(CharSequence text) { Log.d(TAG, "onText? \"" + text + "\""); } @Override public void onRelease(int primaryCode) { Log.d(TAG, "onRelease? primaryCode=" + primaryCode); } @Override public void onPress(int primaryCode) { Log.d(TAG, "onPress? primaryCode=" + primaryCode); } @Override public void onKey(int primaryCode, int[] keyCodes) { Log.d(TAG, "onKey? primaryCode=" + primaryCode); int n1 = 0; // -1 count for (int keyCode : keyCodes) { if (keyCode == -1) { n1++; continue; } Log.v(TAG, "keyCode=" + keyCode); } Log.v(TAG, "keyCode=-1 *" + n1); } @Override public boolean onKey(View v, int keyCode, KeyEvent event) { Log.d(TAG, "onKey? keyCode=" + keyCode); return false; } } 

Bạn nào muốn demo thử thì tạo project rồi thử xem nhé. Khi nào mình có thời gian sẽ code hoàn thiện hơn rồi up link project lên tại đây.