Android 测试自定义纯数字软键盘

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginRight="24dp"
        android:ems="10"
        android:inputType="none" >

        <requestFocus />
    </EditText>

    <android.inputmethodservice.KeyboardView
        android:id="@+id/keyboardview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginTop="5.0dp"
        android:background="#ffffffff"
        android:focusable="true"
        android:keyBackground="@drawable/calculator_button_bg"
        android:keyTextColor="@color/black"
        android:keyTextSize="26.0sp"
        android:shadowColor="#ffffffff"
        android:shadowRadius="0.0"
        android:visibility="gone" />

</RelativeLayout>

hexkbd.xml

<?xml version="1.0" encoding="utf-8"?>
<Keyboard xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="#ffffffff"
    android:keyHeight="10%p"
    android:keyWidth="100%p" >

    <Row>
        <Key
            android:codes="55"
            android:keyEdgeFlags="left"
            android:keyLabel="7" />
        <Key
            android:codes="56"
            android:keyLabel="8" />
        <Key
            android:codes="57"
            android:keyLabel="9" />
    </Row>
    <Row>
        <Key
            android:codes="52"
            android:keyEdgeFlags="left"
            android:keyLabel="4" />
        <Key
            android:codes="53"
            android:keyLabel="5" />
        <Key
            android:codes="54"
            android:keyLabel="6" />
    </Row>
    <Row>
        <Key
            android:codes="49"
            android:keyEdgeFlags="left"
            android:keyLabel="1" />
        <Key
            android:codes="50"
            android:keyLabel="2" />
        <Key
            android:codes="51"
            android:keyLabel="3" />
    </Row>
    <Row>
        <Key
            android:codes="46"
            android:keyEdgeFlags="left"
            android:keyLabel="." />
        <Key
            android:codes="48"
            android:keyLabel="0" />
        <Key
            android:codes="-5"
            android:isRepeatable="true"
            android:keyIcon="@drawable/sym_keyboard_delete" />
    </Row>

</Keyboard>

MainActivity.java

package com.example.yanlei.yl2;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;

public class MainActivity extends Activity implements OnClickListener
{
    CustomKeyboard mCustomKeyboard;
    EditText editText;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editText = (EditText) findViewById(R.id.editText1);
        mCustomKeyboard = new CustomKeyboard(this, R.id.keyboardview,
                R.xml.hexkbd);

        mCustomKeyboard.registerEditText(R.id.editText1);
    }

    @Override
    public void onClick(View v)
    {
        switch (v.getId())
        {
            default:
                break;
        }
    }
}

 CustomKeyboard.java

package com.example.yanlei.yl2;

import android.app.Activity;
import android.inputmethodservice.Keyboard;
import android.inputmethodservice.KeyboardView;
import android.inputmethodservice.KeyboardView.OnKeyboardActionListener;
import android.text.Editable;
import android.text.InputType;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

/**
 * When an activity hosts a keyboardView, this class allows several EditText's
 * to register for it.
 *
 * @author Maarten Pennings
 * @date 2012 December 23
 */
class CustomKeyboard
{

    /** A link to the KeyboardView that is used to render this CustomKeyboard. */
    private KeyboardView mKeyboardView;
    /** A link to the activity that hosts the {@link #mKeyboardView}. */
    private Activity mHostActivity;

    /** The key (code) handler. */
    private OnKeyboardActionListener mOnKeyboardActionListener = new OnKeyboardActionListener()
    {

        public final static int CodeDelete = -5; // Keyboard.KEYCODE_DELETE
        public final static int CodeCancel = -3; // Keyboard.KEYCODE_CANCEL

        @Override
        public void onKey(int primaryCode, int[] keyCodes)
        {
            // NOTE We can say '<Key android:codes="49,50" ... >' in the xml
            // file; all codes come in keyCodes, the first in this list in
            // primaryCode
            // Get the EditText and its Editable
            View focusCurrent = mHostActivity.getWindow().getCurrentFocus();
            if (focusCurrent == null
                    || focusCurrent.getClass() != EditText.class)
                return;
            EditText edittext = (EditText) focusCurrent;
            Editable editable = edittext.getText();
            int start = edittext.getSelectionStart();
            // Apply the key to the edittext
            if (primaryCode == CodeCancel)
            {
                hideCustomKeyboard();
            }
            else if (primaryCode == CodeDelete)
            {
                if (editable != null && start > 0)
                    editable.delete(start - 1, start);
            }
            else
            { // insert character
                editable.insert(start, Character.toString((char) primaryCode));
            }
        }

        @Override
        public void onPress(int arg0)
        {
        }

        @Override
        public void onRelease(int primaryCode)
        {
        }

        @Override
        public void onText(CharSequence text)
        {
        }

        @Override
        public void swipeDown()
        {
        }

        @Override
        public void swipeLeft()
        {
        }

        @Override
        public void swipeRight()
        {
        }

        @Override
        public void swipeUp()
        {
        }
    };

    /**
     * Create a custom keyboard, that uses the KeyboardView (with resource id
     * <var>viewid</var>) of the <var>host</var> activity, and load the keyboard
     * layout from xml file <var>layoutid</var> (see {@link Keyboard} for
     * description). Note that the <var>host</var> activity must have a
     * <var>KeyboardView</var> in its layout (typically aligned with the bottom
     * of the activity). Note that the keyboard layout xml file may include key
     * codes for navigation; see the constants in this class for their values.
     * Note that to enable EditText's to use this custom keyboard, call the
     * {@link #registerEditText(int)}.
     *
     * @param host
     *            The hosting activity.
     * @param viewid
     *            The id of the KeyboardView.
     * @param layoutid
     *            The id of the xml file containing the keyboard layout.
     */
    public CustomKeyboard(Activity host, int viewid, int layoutid)
    {
        mHostActivity = host;
        mKeyboardView = (KeyboardView) mHostActivity.findViewById(viewid);
        mKeyboardView.setKeyboard(new Keyboard(mHostActivity, layoutid));
        mKeyboardView.setPreviewEnabled(false); // NOTE Do not show the preview
        // balloons
        mKeyboardView.setOnKeyboardActionListener(mOnKeyboardActionListener);
        // Hide the standard keyboard initially
        mHostActivity.getWindow().setSoftInputMode(
                WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
    }

    /** Returns whether the CustomKeyboard is visible. */
    public boolean isCustomKeyboardVisible()
    {
        return mKeyboardView.getVisibility() == View.VISIBLE;
    }

    /**
     * Make the CustomKeyboard visible, and hide the system keyboard for view v.
     */
    public void showCustomKeyboard(View v)
    {
        mKeyboardView.setVisibility(View.VISIBLE);
        mKeyboardView.setEnabled(true);
        if (v != null)
            ((InputMethodManager) mHostActivity
                    .getSystemService(Activity.INPUT_METHOD_SERVICE))
                    .hideSoftInputFromWindow(v.getWindowToken(), 0);
    }

    /** Make the CustomKeyboard invisible. */
    public void hideCustomKeyboard()
    {
        mKeyboardView.setVisibility(View.GONE);
        mKeyboardView.setEnabled(false);
    }

    /**
     * Register <var>EditText<var> with resource id <var>resid</var> (on the
     * hosting activity) for using this custom keyboard.
     *
     * @param resid
     *            The resource id of the EditText that registers to the custom
     *            keyboard.
     */
    public void registerEditText(int resid)
    {
        // Find the EditText 'resid'
        EditText edittext = (EditText) mHostActivity.findViewById(resid);
        // Make the custom keyboard appear
        edittext.setOnFocusChangeListener(new OnFocusChangeListener()
        {
            // NOTE By setting the on focus listener, we can show the custom
            // keyboard when the edit box gets focus, but also hide it when the
            // edit box loses focus
            @Override
            public void onFocusChange(View v, boolean hasFocus)
            {
                if (hasFocus)
                    showCustomKeyboard(v);
                else
                    hideCustomKeyboard();
            }
        });
        edittext.setOnClickListener(new OnClickListener()
        {
            // NOTE By setting the on click listener, we can show the custom
            // keyboard again, by tapping on an edit box that already had focus
            // (but that had the keyboard hidden).
            @Override
            public void onClick(View v)
            {
                showCustomKeyboard(v);
            }
        });
        // Disable standard keyboard hard way
        // NOTE There is also an easy way:
        // 'edittext.setInputType(InputType.TYPE_NULL)' (but you will not have a
        // cursor, and no 'edittext.setCursorVisible(true)' doesn't work )
        edittext.setOnTouchListener(new OnTouchListener()
        {
            @Override
            public boolean onTouch(View v, MotionEvent event)
            {
                EditText edittext = (EditText) v;
                int inType = edittext.getInputType(); // Backup the input type
                edittext.setInputType(InputType.TYPE_NULL); // Disable standard
                // keyboard
                edittext.onTouchEvent(event); // Call native handler
                edittext.setInputType(inType); // Restore input type
                return true; // Consume touch event
            }
        });
        // Disable spell check (hex strings look like words to Android)
        edittext.setInputType(edittext.getInputType()
                | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
    }

}

// NOTE How can we change the background color of some keys (like the
// shift/ctrl/alt)?
// NOTE What does android:keyEdgeFlags do/mean