几天前，我在我的 android 应用程序中为几个 EditText 实现了自定义键盘。这些 EditText 的数量可能会因情况而异。在我的键盘中，我想实现“Enter”键，这将请求焦点到布局中的下一个 EditText（如在标准 Android 软键盘中）。我正在尝试使用
editText.requestFocus(View.FOCUS_DOWN)
但似乎这种方法不起作用。
这是我的键盘实现：
public class MacKeyboard implements KeyboardView.OnKeyboardActionListener {
EditText mParentEditText;
KeyboardView mKeyboardView;
static final int CODE_BACKSPACE = 16;
static final int CODE_HIDE_KEYBOARD = 17;
static final int CODE_NEXT_INPUT = 18;
static final HashMap<Integer, Integer> codeMap = new HashMap<Integer, Integer>() {{
put(0, KeyEvent.KEYCODE_0);
put(1, KeyEvent.KEYCODE_1);
put(2, KeyEvent.KEYCODE_2);
put(3, KeyEvent.KEYCODE_3);
put(4, KeyEvent.KEYCODE_4);
put(5, KeyEvent.KEYCODE_5);
put(6, KeyEvent.KEYCODE_6);
put(7, KeyEvent.KEYCODE_7);
put(8, KeyEvent.KEYCODE_8);
put(9, KeyEvent.KEYCODE_9);
put(10, KeyEvent.KEYCODE_A);
put(11, KeyEvent.KEYCODE_B);
put(12, KeyEvent.KEYCODE_C);
put(13, KeyEvent.KEYCODE_D);
put(14, KeyEvent.KEYCODE_E);
put(15, KeyEvent.KEYCODE_F);
}};
void handleBackspace() {
mParentEditText.onKeyDown(
KeyEvent.KEYCODE_DEL,
new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL)
);
}
public MacKeyboard(KeyboardView keyboardView) {
mKeyboardView = keyboardView;
}
public boolean isVisible() {
return mKeyboardView.getVisibility() == View.VISIBLE;
}
public void hide() {
mKeyboardView.setVisibility(View.GONE);
}
public void show(EditText parentEditText) {
mKeyboardView.setVisibility(View.VISIBLE);
mParentEditText = parentEditText;
}
public void toggle(EditText parentEditText) {
switch ( mKeyboardView.getVisibility() ) {
case View.VISIBLE:
mKeyboardView.setVisibility(View.GONE);
break;
case View.GONE:
case View.INVISIBLE:
mKeyboardView.setVisibility(View.VISIBLE);
mParentEditText = parentEditText;
break;
}
}
@Override
public void onPress(int primaryCode) {
//do nothing
}
@Override
public void onRelease(int primaryCode) {
//do nothing
}
@Override
public void onKey(int primaryCode, int[] keyCodes) {
if ( mParentEditText != null ) {
if ( codeMap.containsKey(primaryCode) ) {
int actualKeycode = codeMap.get(primaryCode);
if ( primaryCode < 10 ) {
mParentEditText.onKeyDown(
actualKeycode,
new KeyEvent(KeyEvent.ACTION_DOWN, actualKeycode)
);
} else {
mParentEditText.onKeyDown(
actualKeycode,
new KeyEvent(0, 0, KeyEvent.ACTION_DOWN, actualKeycode, 0, KeyEvent.META_SHIFT_ON)
);
}
} else {
switch ( primaryCode ) {
case CODE_BACKSPACE:
handleBackspace();
break;
case CODE_HIDE_KEYBOARD:
hide();
break;
case CODE_NEXT_INPUT:
mParentEditText.clearFocus();
mParentEditText.requestFocus(View.FOCUS_DOWN);
/* here i also tried
mParentEditText.onKeyDown(
KeyEvent.KEYCODE_ENTER,
new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER)
);
and editText.post(...);
*/
}
}
}
}
@Override
public void onText(CharSequence text) {
//do nothing
}
@Override
public void swipeLeft() {
handleBackspace();
}
@Override
public void swipeRight() {
//do nothing
}
@Override
public void swipeDown() {
hide();
}
@Override
public void swipeUp() {
//do nothing
}
}
XML 键盘布局
<Keyboard
xmlns:android="http://schemas.android.com/apk/res/android"
android:keyWidth="20%p"
android:keyHeight="60.0dip"
android:horizontalGap="3.0dip"
android:verticalGap="2.0dip">
<Row>
<Key android:codes="1" android:keyLabel="1"/>
<Key android:codes="2" android:keyLabel="2"/>
<Key android:codes="3" android:keyLabel="3"/>
<Key android:codes="4" android:keyLabel="4"/>
<Key android:codes="5" android:keyLabel="5"/>
</Row>
<Row>
<Key android:codes="6" android:keyLabel="6"/>
<Key android:codes="7" android:keyLabel="7"/>
<Key android:codes="8" android:keyLabel="8"/>
<Key android:codes="9" android:keyLabel="9"/>
<Key android:codes="0" android:keyLabel="0"/>
</Row>
<Row>
<Key android:codes="10" android:keyLabel="A"/>
<Key android:codes="11" android:keyLabel="B"/>
<Key android:codes="12" android:keyLabel="C"/>
<Key android:codes="13" android:keyLabel="D"/>
<Key android:codes="14" android:keyLabel="E"/>
<Key android:codes="15" android:keyLabel="F"/>
</Row>
<Row android:keyWidth="33.3%p">
<Key android:codes="17" android:keyLabel="."/>
<Key android:codes="18" android:keyLabel=">"/>
<Key android:codes="16" android:keyIcon="@drawable/ic_backspace" android:isRepeatable="true"/>
</Row>
</Keyboard>
主要布局
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@+id/keyboard_mac"
android:fillViewport="true"
android:clipChildren="false"
android:clipToPadding="false">
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/focusDisabler"
android:paddingBottom="10dp"
android:layout_marginTop="5dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_gravity="center_horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:focusableInTouchMode="true">
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/group_wlanMac"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:background="@drawable/bcg_button" >
<TextView
android:id="@+id/tview_wlanMac"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="25dp"
android:layout_marginRight="20dp"
android:layout_marginTop="10dp"
android:layout_marginBottom="5dp"
android:textColor="#ffffff"
android:text="@string/txt_wlanMac"/>
<RelativeLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp">
<EditText
android:id="@+id/tedit_wlanMac"
android:layout_width="match_parent"
android:layout_height="40.0dip"
android:layout_centerVertical="true"
android:layout_toLeftOf="@+id/chbox_enableWlanMac"
android:maxLength="12"
android:nextFocusDown="@+id/tedit_wpanMac"/>
<CheckBox
android:id="@+id/chbox_enableWlanMac"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:checked="true"/>
</RelativeLayout>
</LinearLayout>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/group_wpanMac"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/group_wlanMac"
android:background="@drawable/bcg_button" >
<TextView
android:id="@+id/tview_wpanMac"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="25dp"
android:layout_marginRight="20dp"
android:layout_marginTop="10dp"
android:layout_marginBottom="5dp"
android:textColor="#ffffff"
android:text="@string/txt_wpanMac" />
<RelativeLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginBottom="10dp">
<EditText
android:id="@+id/tedit_wpanMac"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_centerVertical="true"
android:layout_toLeftOf="@+id/chbox_enableWpanMac"
android:inputType="text"/>
<CheckBox
android:id="@+id/chbox_enableWpanMac"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:checked="true"/>
</RelativeLayout>
</LinearLayout>
<!-- SOME OTHER LAYOUTS... -->
</RelativeLayout>
</ScrollView>
<android.inputmethodservice.KeyboardView
style="@style/Keyboard"
android:id="@+id/keyboard_mac"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_alignParentBottom="true"
android:visibility="gone"/>
</RelativeLayout>
活动
public class _identificationChange extends _Activity
{
EditText mEdit_wlanMac;
EditText mEdit_wpanMac;
MacKeyboard mKeyboardMac = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.identification_change);
mEdit_wlanMac = (EditText) findViewById(R.id.tedit_wlanMac);
mEdit_wpanMac = (EditText) findViewById(R.id.tedit_wpanMac);
KeyboardView keyboardView = (KeyboardView) findViewById(R.id.keyboard_mac);
Keyboard keyboard = new Keyboard(this, R.xml.keyboard_mac);
keyboardView.setKeyboard(keyboard);
keyboardView.setEnabled(true);
keyboardView.setPreviewEnabled(false);
mKeyboardMac = new MacKeyboard(keyboardView);
keyboardView.setOnKeyboardActionListener(mKeyboardMac);
mEdit_wlanMac.setOnFocusChangeListener(
new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean hasFocus) {
if ( hasFocus ) {
mKeyboardMac.show(mEdit_wlanMac);
} else {
mKeyboardMac.hide();
}
}
}
);
mEdit_wlanMac.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View view) {
mKeyboardMac.show(mEdit_wlanMac);
}
}
);
}
@Override
public void onBackPressed() {
if ( mKeyboardMac.isVisible() ) {
mKeyboardMac.hide();
} else {
super.onBackPressed();
}
}
}
我将不胜感激。