Android 软键盘相关

Android2.2的Phone界面会有软键盘弹出！
原因是

mDigits.setKeyListener(DialerKeyListener.getInstance());
mDigits.setInputType(InputType.TYPE_CLASS_PHONE);

把这两行去掉并加上一句mDigits.setInputType(InputType.TYPE_NULL);就行了！
Phone那个拨号界面对应的是Contacts下的TwelveKeyDialer.java
本身采用的是

playTone(ToneGenerator.TONE_DTMF_1);//生音是否显示
keyPressed(KeyEvent.KEYCODE_1);//输入的数字

 mHaptic.vibrate();//震动
 KeyEvent event = new KeyEvent(KeyEvent.ACTION_DOWN, keyCode);
 mDigits.onKeyDown(keyCode, event);//keycode对应的就是KeyEvent.KEYCODE_1

keyCode对应的去取对应的值！这个值对应的在MultiTapKeyListener.java中有定义！

static {
        sRecs.put(KeyEvent.KEYCODE_1,     ".,1!@#$%^&*:/?'=()");
        sRecs.put(KeyEvent.KEYCODE_2,     "abc2ABC");
        sRecs.put(KeyEvent.KEYCODE_3,     "def3DEF");
        sRecs.put(KeyEvent.KEYCODE_4,     "ghi4GHI");
        sRecs.put(KeyEvent.KEYCODE_5,     "jkl5JKL");
        sRecs.put(KeyEvent.KEYCODE_6,     "mno6MNO");
        sRecs.put(KeyEvent.KEYCODE_7,     "pqrs7PQRS");
        sRecs.put(KeyEvent.KEYCODE_8,     "tuv8TUV");
        sRecs.put(KeyEvent.KEYCODE_9,     "wxyz9WXYZ");
        sRecs.put(KeyEvent.KEYCODE_0,     "0+");
        sRecs.put(KeyEvent.KEYCODE_POUND, " ");
    };

根据这个MultiTapKeyListener.java的注释

/**
 * This is the standard key listener for alphabetic input on 12-key
 * keyboards.  You should generally not need to instantiate this yourself;
 * TextKeyListener will do it for you.
 */

说明实际是由TextKeyListener.java来控制的！

 @Override
    public boolean onKeyDown(View view, Editable content,
                             int keyCode, KeyEvent event) {
        KeyListener im = getKeyListener(event);

        return im.onKeyDown(view, content, keyCode, event);
    }

KeyListener 接口对应的返回实例在这里类型有两种！

private KeyListener getKeyListener(KeyEvent event) {
        KeyCharacterMap kmap = KeyCharacterMap.load(event.getKeyboardDevice());
        int kind = kmap.getKeyboardType();

        if (kind == KeyCharacterMap.ALPHA) {
            return QwertyKeyListener.getInstance(mAutoText, mAutoCap);
        } else if (kind == KeyCharacterMap.NUMERIC) {
            return MultiTapKeyListener.getInstance(mAutoText, mAutoCap);
        }

        return NullKeyListener.getInstance();
    }

 /**
     * Returns {@link #NUMERIC}, {@link #PREDICTIVE} or {@link #ALPHA}.
     */
    public int getKeyboardType()
    {
        return getKeyboardType_native(mPointer);
    }

private static native int getKeyboardType_native(int ptr);返回NUMERIC数值类型或ALPHA希腊字母类型或PREDICTIVE这个返回的实际就是空的类型.

最后这个值是怎么取出来的列！已返回QwertyKeyListener.getInstance(mAutoText, mAutoCap);为例。
在QwertyKeyListener的onKeyDown方法中的

 int i = event.getUnicodeChar(getMetaState(content));

 public int getUnicodeChar(int meta) {
        return KeyCharacterMap.load(mDeviceId).get(mKeyCode, meta);
    }

 private static native char get_native(int ptr, int keycode,
                                    int meta);

键布局映射文件通常放在/system/usr/keylayout和/data/usr/keylayout

对于每一个键盘设备xxx,设置系统属性android.keylayout.xxx,如果没有为自己的硬件设备创建一个特定的设备，Android将去读/system/usr/keylayout/qwerty.kl这个配置文件。

key 399   GRAVE
key 2     1
key 3     2
key 4     3
key 5     4
key 6     5
key 7     6
key 8     7
key 9     8
key 10    9
key 11    0
key 158   BACK              WAKE_DROPPED
key 230   SOFT_RIGHT        WAKE
key 60    SOFT_RIGHT        WAKE
key 107   ENDCALL           WAKE_DROPPED
key 62    ENDCALL           WAKE_DROPPED
key 229   MENU              WAKE_DROPPED
key 139   MENU              WAKE_DROPPED
key 59    MENU              WAKE_DROPPED
key 127   SEARCH            WAKE_DROPPED
key 217   SEARCH            WAKE_DROPPED
key 228   POUND
key 227   STAR
key 231   CALL              WAKE_DROPPED
key 61    CALL              WAKE_DROPPED
key 232   DPAD_CENTER       WAKE_DROPPED
key 108   DPAD_DOWN         WAKE_DROPPED
key 103   DPAD_UP           WAKE_DROPPED
key 102   HOME              WAKE
key 105   DPAD_LEFT         WAKE_DROPPED
key 106   DPAD_RIGHT        WAKE_DROPPED
key 115   VOLUME_UP
key 114   VOLUME_DOWN
key 116   POWER             WAKE
key 212   CAMERA

key 16    Q
key 17    W
key 18    E
key 19    R
key 20    T
key 21    Y
key 22    U
key 23    I
key 24    O
key 25    P
key 26    LEFT_BRACKET
key 27    RIGHT_BRACKET
key 43    BACKSLASH

key 30    A
key 31    S
key 32    D
key 33    F
key 34    G
key 35    H
key 36    J
key 37    K
key 38    L
key 39    SEMICOLON
key 40    APOSTROPHE
key 14    DEL
        
key 44    Z
key 45    X
key 46    C
key 47    V
key 48    B
key 49    N
key 50    M
key 51    COMMA
key 52    PERIOD
key 53    SLASH
key 28    ENTER
        
key 56    ALT_LEFT
key 100   ALT_RIGHT
key 42    SHIFT_LEFT
key 54    SHIFT_RIGHT
key 15    TAB
key 57    SPACE
key 150   EXPLORER
key 155   ENVELOPE        

key 12    MINUS
key 13    EQUALS
key 215   AT