外界实体物理键盘，需要选择键盘布局，不然会对应输入不正确，某些平台是这样的。
实体键盘在插入设备中后会自动设置一个布局，但是可能不是我们想要的。
修改两个功能：
根据系统语言设置默认的键盘。
默认添加两个键盘布局到'选择键盘布局' 的dialog界面
键盘的布局文件apk位置:
frameworks/base/packages/InputDevices/res/raw/
frameworks/base/packages/InputDevices/res/xml/keyboard_layouts.xml
追查设置中的布局找到这里，选择键盘布局的Dialog，packages/apps/Settings/src/com/android/settings/inputmethod/KeyboardLayoutDialogFragment.java
点击设置键盘布局，会走到 packages/apps/Settings/src/com/android/settings/inputmethod/KeyboardLayoutPickerController.java
查看到 addKeyboardLayoutForInputDevice 设置键盘布局，所以利用这里我们添加。
java
@Override
public boolean handlePreferenceTreeClick(Preference preference) {
if(DEBUG)Log.d("testkeyboard","----handlePreferenceTreeClick---");
if (!(preference instanceof SwitchPreference)) {
return false;
}
final SwitchPreference switchPref = (SwitchPreference) preference;
final KeyboardLayout layout = mPreferenceMap.get(switchPref);
if (layout != null) {
final boolean checked = switchPref.isChecked();
if (checked) {
mIm.addKeyboardLayoutForInputDevice(mInputDeviceIdentifier,
layout.getDescriptor());
if(DEBUG)Log.d("testkeyboard","layout.getDescriptor() = " + layout.getDescriptor());
} else {
mIm.removeKeyboardLayoutForInputDevice(mInputDeviceIdentifier,
layout.getDescriptor());
}
}
return true;
}
主要修改 frameworks/base/services/core/java/com/android/server/input/InputManagerService.java
addKeyboardLayoutForInputDevice(InputDeviceIdentifier identifier,String keyboardLayoutDescriptor)
如下修改：
diff
diff --git a/frameworks/base/services/core/java/com/android/server/input/InputManagerService.java b/frameworks/base/services/core/java/com/android/server/input/InputManagerService.java
index 5fc3712d221..1bc1ee6cef7 100755
--- a/frameworks/base/services/core/java/com/android/server/input/InputManagerService.java
+++ b/frameworks/base/services/core/java/com/android/server/input/InputManagerService.java
@@ -1101,6 +1101,7 @@ public class InputManagerService extends IInputManager.Stub
String layout =getCurrentKeyboardLayoutForInputDevice(inputDevice.getIdentifier());
if (layout == null) {
+ if(DEBUG) Slog.d("testkeyboard", "---goto--getDefaultKeyboardLayout");
layout = getDefaultKeyboardLayout(inputDevice);
if (layout != null) {
setCurrentKeyboardLayoutForInputDevice(
@@ -1134,6 +1135,20 @@ public class InputManagerService extends IInputManager.Stub
final Locale systemLocale = mContext.getResources().getConfiguration().locale;
// If our locale doesn't have a language for some reason, then we don't really have a
// reasonable default.
+
+ if(DEBUG) Slog.d("testkeyboard", "---getDefaultKeyboardLayout---getLanguage="+systemLocale.getLanguage());
+ String russuan = "com.android.inputdevices/com.android.inputdevices.InputDeviceReceiver/keyboard_layout_russian";
+ String english_us = "com.android.inputdevices/com.android.inputdevices.InputDeviceReceiver/keyboard_layout_english_us";
//根据语言设置当前键盘
+ if(systemLocale.getLanguage().equals("en")){
+ return english_us;
+ }
+ if(systemLocale.getLanguage().equals("ru")){
+ return russuan;
+ }
+ //这里就是添加的两个键盘
+ addKeyboardLayoutForInputDevice(d.getIdentifier(),russuan);
+ addKeyboardLayoutForInputDevice(d.getIdentifier(),english_us);
+
if (TextUtils.isEmpty(systemLocale.getLanguage())) {
return null;
}
@@ -1150,6 +1165,7 @@ public class InputManagerService extends IInputManager.Stub
for (int localeIndex = 0; localeIndex < numLocales; ++localeIndex) {
if (isCompatibleLocale(systemLocale, locales.get(localeIndex))) {
layouts.add(layout);
+ if(DEBUG) Slog.d("testkeyboard", "---getDefaultKeyboardLayout---for--getLanguage="+systemLocale.getLanguage());
break;
}
}
@@ -1386,10 +1402,12 @@ public class InputManagerService extends IInputManager.Stub
@Override // Binder call
public KeyboardLayout[] getKeyboardLayoutsForInputDevice(
final InputDeviceIdentifier identifier) {
+ if(DEBUG) Slog.d("testkeyboard", "---getKeyboardLayoutsForInputDevice---");
final String[] enabledLayoutDescriptors =
getEnabledKeyboardLayoutsForInputDevice(identifier);
final ArrayList<KeyboardLayout> enabledLayouts =
new ArrayList<>(enabledLayoutDescriptors.length);
+ if(DEBUG) Slog.d("testkeyboard", "---ArrayList enabledLayouts---");
final ArrayList<KeyboardLayout> potentialLayouts = new ArrayList<>();
visitAllKeyboardLayouts(new KeyboardLayoutVisitor() {
boolean mHasSeenDeviceSpecificLayout;
@@ -1402,6 +1420,7 @@ public class InputManagerService extends IInputManager.Stub
for (String s : enabledLayoutDescriptors) {
if (s != null && s.equals(layout.getDescriptor())) {
enabledLayouts.add(layout);
+ if(DEBUG) Slog.d("testkeyboard", "---ArrayList enabledLayouts.add---");
return;
}
}
@@ -1436,8 +1455,10 @@ public class InputManagerService extends IInputManager.Stub
public KeyboardLayout getKeyboardLayout(String keyboardLayoutDescriptor) {
Objects.requireNonNull(keyboardLayoutDescriptor,
"keyboardLayoutDescriptor must not be null");
+ if(DEBUG) Slog.d("testkeyboard", "---getKeyboardLayout---keyboardLayoutDescriptor="+keyboardLayoutDescriptor);
final KeyboardLayout[] result = new KeyboardLayout[1];
+ if(result!=null) Slog.d("testkeyboard", "---getKeyboardLayout---result.length="+result.length);
visitKeyboardLayout(keyboardLayoutDescriptor,
(resources, keyboardLayoutResId, layout) -> result[0] = layout);
if (result[0] == null) {
@@ -1632,12 +1653,15 @@ public class InputManagerService extends IInputManager.Stub
@Override // Binder call
public String[] getEnabledKeyboardLayoutsForInputDevice(InputDeviceIdentifier identifier) {
String key = getLayoutDescriptor(identifier);
+ if(DEBUG) Slog.d("testkeyboard", "---getEnabledKeyboardLayoutsForInputDevice---key="+key);
synchronized (mDataStore) {
String[] layouts = mDataStore.getKeyboardLayouts(key);
+ if(DEBUG) Slog.d("testkeyboard", "---getEnabledKeyboardLayoutsForInputDevice---getDescriptor="+identifier.getDescriptor());
if ((layouts == null || layouts.length == 0)
&& !key.equals(identifier.getDescriptor())) {
layouts = mDataStore.getKeyboardLayouts(identifier.getDescriptor());
}
+ if(DEBUG) Slog.d("testkeyboard", "---getEnabledKeyboardLayoutsForInputDevice---length="+layouts.length);
return layouts;
}
}
@@ -1645,6 +1669,7 @@ public class InputManagerService extends IInputManager.Stub
@Override // Binder call
public void addKeyboardLayoutForInputDevice(InputDeviceIdentifier identifier,
String keyboardLayoutDescriptor) {
+ if(DEBUG) Slog.d("testkeyboard", "---addKeyboardLayoutForInputDevice---keyboardLayoutDescriptor="+keyboardLayoutDescriptor);
if (!checkCallingPermission(android.Manifest.permission.SET_KEYBOARD_LAYOUT,
"addKeyboardLayoutForInputDevice()")) {
throw new SecurityException("Requires SET_KEYBOARD_LAYOUT permission");
@@ -1653,6 +1678,7 @@ public class InputManagerService extends IInputManager.Stub
"keyboardLayoutDescriptor must not be null");
String key = getLayoutDescriptor(identifier);
+ if(DEBUG) Slog.d("testkeyboard", "---addKeyboardLayoutForInputDevice---key="+key);
synchronized (mDataStore) {
try {
String oldLayout = mDataStore.getCurrentKeyboardLayout(key);