waterlife
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firojre：
我觉得你把OSI model 和Network socket ...
Linux协议栈之BSD和INET socket层（一） -
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Linux的BSD和INET socket层分别对应于ISO ...
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一个UI中，new 两个 handler 是什么情况？是一个h ...
Android Framework系列之IPC（一）
Android通过 KeyInputQ在WindowMangerService中建立一个独立的线程InputDeviceReader，使用Native函数readEvent来读取Linux Driver的数据构建RawEvent，并放入到KeyQ消息队列中。
KeyInputQueue.java
Thread mThread = new Thread("InputDeviceReader") {
public void run() {
if (DEBUG) Log.v(TAG, "InputDeviceReader.run()");
android.os.Process.setThreadPriority(
android.os.Process.THREAD_PRIORITY_URGENT_DISPLAY);
RawInputEvent ev = new RawInputEvent();
while (true) {
try {
InputDevice di;
// block, doesn't release the monitor
readEvent(ev);
boolean send = false;
boolean configChanged = false;
if (false) {
Log.i(TAG, "Input event: dev=0x"
+ Integer.toHexString(ev.deviceId)
+ " type=0x" + Integer.toHexString(ev.type)
+ " scancode=" + ev.scancode
+ " keycode=" + ev.keycode
+ " value=" + ev.value);
}
if (ev.type == RawInputEvent.EV_DEVICE_ADDED) {
synchronized (mFirst) {
di = newInputDevice(ev.deviceId);
if (di.classes != 0) {
// If this device is some kind of input class,
// we care about it.
mDevices.put(ev.deviceId, di);
if ((di.classes & RawInputEvent.CLASS_TOUCHSCREEN) != 0) {
readVirtualKeys(di.name);
}
// The configuration may have changed because
// of this device.
configChanged = true;
} else {
// We won't do anything with this device.
mIgnoredDevices.put(ev.deviceId, di);
Log.i(TAG, "Ignoring non-input device: id=0x"
+ Integer.toHexString(di.id)
+ ", name=" + di.name);
}
}
} else if (ev.type == RawInputEvent.EV_DEVICE_REMOVED) {
synchronized (mFirst) {
if (false) {
Log.i(TAG, "Device removed: id=0x"
+ Integer.toHexString(ev.deviceId));
}
di = mDevices.get(ev.deviceId);
if (di != null) {
mDevices.delete(ev.deviceId);
// The configuration may have changed because
// of this device.
configChanged = true;
} else if ((di=mIgnoredDevices.get(ev.deviceId)) != null) {
mIgnoredDevices.remove(ev.deviceId);
} else {
Log.w(TAG, "Removing bad device id: "
+ Integer.toHexString(ev.deviceId));
continue;
}
}
} else {
di = getInputDevice(ev.deviceId);
if (di == null) {
// This may be some junk from an ignored device.
continue;
}
// first crack at it
send = preprocessEvent(di, ev);
if (ev.type == RawInputEvent.EV_KEY) {
di.mMetaKeysState = makeMetaState(ev.keycode,
ev.value != 0, di.mMetaKeysState);
mHaveGlobalMetaState = false;
}
}
if (configChanged) {
synchronized (mFirst) {
addLocked(di, System.nanoTime(), 0,
RawInputEvent.CLASS_CONFIGURATION_CHANGED,
null);
}
}
if (!send) {
continue;
}
synchronized (mFirst) {
// NOTE: The event timebase absolutely must be the same
// timebase as SystemClock.uptimeMillis().
//curTime = gotOne ? ev.when : SystemClock.uptimeMillis();
final long curTime = SystemClock.uptimeMillis();
final long curTimeNano = System.nanoTime();
//Log.i(TAG, "curTime=" + curTime + ", systemClock=" + SystemClock.uptimeMillis());
final int classes = di.classes;
final int type = ev.type;
final int scancode = ev.scancode;
send = false;
// Is it a key event?
if (type == RawInputEvent.EV_KEY &&
(classes&RawInputEvent.CLASS_KEYBOARD) != 0 &&
(scancode < RawInputEvent.BTN_FIRST ||
scancode > RawInputEvent.BTN_LAST)) {
boolean down;
if (ev.value != 0) {
down = true;
di.mKeyDownTime = curTime;
} else {
down = false;
}
int keycode = rotateKeyCodeLocked(ev.keycode);
addLocked(di, curTimeNano, ev.flags,
RawInputEvent.CLASS_KEYBOARD,
newKeyEvent(di, di.mKeyDownTime, curTime, down,
keycode, 0, scancode,
((ev.flags & WindowManagerPolicy.FLAG_WOKE_HERE) != 0)
? KeyEvent.FLAG_WOKE_HERE : 0));
} else if (ev.type == RawInputEvent.EV_KEY) {
// Single touch protocol: touch going down or up.
if (ev.scancode == RawInputEvent.BTN_TOUCH &&
(classes&(RawInputEvent.CLASS_TOUCHSCREEN
|RawInputEvent.CLASS_TOUCHSCREEN_MT))
== RawInputEvent.CLASS_TOUCHSCREEN) {
di.mAbs.changed = true;
di.mAbs.mDown[0] = ev.value != 0;
// Trackball (mouse) protocol: press down or up.
} else if (ev.scancode == RawInputEvent.BTN_MOUSE &&
(classes&RawInputEvent.CLASS_TRACKBALL) != 0) {
di.mRel.changed = true;
di.mRel.mNextNumPointers = ev.value != 0 ? 1 : 0;
send = true;
}
// Process position events from multitouch protocol.
} else if (ev.type == RawInputEvent.EV_ABS &&
(classes&RawInputEvent.CLASS_TOUCHSCREEN_MT) != 0) {
if (ev.scancode == RawInputEvent.ABS_MT_TOUCH_MAJOR) {
di.mAbs.changed = true;
di.mAbs.mNextData[di.mAbs.mAddingPointerOffset
+ MotionEvent.SAMPLE_PRESSURE] = ev.value;
} else if (ev.scancode == RawInputEvent.ABS_MT_POSITION_X) {
di.mAbs.changed = true;
di.mAbs.mNextData[di.mAbs.mAddingPointerOffset
+ MotionEvent.SAMPLE_X] = ev.value;
if (DEBUG_POINTERS) Log.v(TAG, "MT @"
+ di.mAbs.mAddingPointerOffset
+ " X:" + ev.value);
} else if (ev.scancode == RawInputEvent.ABS_MT_POSITION_Y) {
di.mAbs.changed = true;
di.mAbs.mNextData[di.mAbs.mAddingPointerOffset
+ MotionEvent.SAMPLE_Y] = ev.value;
if (DEBUG_POINTERS) Log.v(TAG, "MT @"
+ di.mAbs.mAddingPointerOffset
+ " Y:" + ev.value);
} else if (ev.scancode == RawInputEvent.ABS_MT_WIDTH_MAJOR) {
di.mAbs.changed = true;
di.mAbs.mNextData[di.mAbs.mAddingPointerOffset
+ MotionEvent.SAMPLE_SIZE] = ev.value;
}
// Process position events from single touch protocol.
} else if (ev.type == RawInputEvent.EV_ABS &&
(classes&RawInputEvent.CLASS_TOUCHSCREEN) != 0) {
if (ev.scancode == RawInputEvent.ABS_X) {
di.mAbs.changed = true;
di.curTouchVals[MotionEvent.SAMPLE_X] = ev.value;
} else if (ev.scancode == RawInputEvent.ABS_Y) {
di.mAbs.changed = true;
di.curTouchVals[MotionEvent.SAMPLE_Y] = ev.value;
} else if (ev.scancode == RawInputEvent.ABS_PRESSURE) {
di.mAbs.changed = true;
di.curTouchVals[MotionEvent.SAMPLE_PRESSURE] = ev.value;
di.curTouchVals[MotionEvent.NUM_SAMPLE_DATA
+ MotionEvent.SAMPLE_PRESSURE] = ev.value;
} else if (ev.scancode == RawInputEvent.ABS_TOOL_WIDTH) {
di.mAbs.changed = true;
di.curTouchVals[MotionEvent.SAMPLE_SIZE] = ev.value;
di.curTouchVals[MotionEvent.NUM_SAMPLE_DATA
+ MotionEvent.SAMPLE_SIZE] = ev.value;
}
// Process movement events from trackball (mouse) protocol.
} else if (ev.type == RawInputEvent.EV_REL &&
(classes&RawInputEvent.CLASS_TRACKBALL) != 0) {
// Add this relative movement into our totals.
if (ev.scancode == RawInputEvent.REL_X) {
di.mRel.changed = true;
di.mRel.mNextData[MotionEvent.SAMPLE_X] += ev.value;
} else if (ev.scancode == RawInputEvent.REL_Y) {
di.mRel.changed = true;
di.mRel.mNextData[MotionEvent.SAMPLE_Y] += ev.value;
}
}
// Handle multitouch protocol sync: tells us that the
// driver has returned all data for -one- of the pointers
// that is currently down.
if (ev.type == RawInputEvent.EV_SYN
&& ev.scancode == RawInputEvent.SYN_MT_REPORT
&& di.mAbs != null) {
di.mAbs.changed = true;
if (di.mAbs.mNextData[MotionEvent.SAMPLE_PRESSURE] > 0) {
// If the value is <= 0, the pointer is not
// down, so keep it in the count.
if (di.mAbs.mNextData[di.mAbs.mAddingPointerOffset
+ MotionEvent.SAMPLE_PRESSURE] != 0) {
final int num = di.mAbs.mNextNumPointers+1;
di.mAbs.mNextNumPointers = num;
if (DEBUG_POINTERS) Log.v(TAG,
"MT_REPORT: now have " + num + " pointers");
final int newOffset = (num <= InputDevice.MAX_POINTERS)
? (num * MotionEvent.NUM_SAMPLE_DATA)
: (InputDevice.MAX_POINTERS *
MotionEvent.NUM_SAMPLE_DATA);
di.mAbs.mAddingPointerOffset = newOffset;
di.mAbs.mNextData[newOffset
+ MotionEvent.SAMPLE_PRESSURE] = 0;
} else {
if (DEBUG_POINTERS) Log.v(TAG, "MT_REPORT: no pointer");
}
}
// Handle general event sync: all data for the current
// event update has been delivered.
} else if (send || (ev.type == RawInputEvent.EV_SYN
&& ev.scancode == RawInputEvent.SYN_REPORT)) {
if (mDisplay != null) {
if (!mHaveGlobalMetaState) {
computeGlobalMetaStateLocked();
}
MotionEvent me;
InputDevice.MotionState ms = di.mAbs;
if (ms.changed) {
ms.changed = false;
if ((classes&(RawInputEvent.CLASS_TOUCHSCREEN
|RawInputEvent.CLASS_TOUCHSCREEN_MT))
== RawInputEvent.CLASS_TOUCHSCREEN) {
ms.mNextNumPointers = 0;
if (ms.mDown[0]) {
System.arraycopy(di.curTouchVals, 0,
ms.mNextData, 0,
MotionEvent.NUM_SAMPLE_DATA);
ms.mNextNumPointers++;
}
}
if (BAD_TOUCH_HACK) {
ms.dropBadPoint(di);
}
boolean doMotion = !monitorVirtualKey(di,
ev, curTime, curTimeNano);
if (doMotion && ms.mNextNumPointers > 0
&& (ms.mLastNumPointers == 0
|| ms.mSkipLastPointers)) {
doMotion = !generateVirtualKeyDown(di,
ev, curTime, curTimeNano);
}
if (doMotion) {
// XXX Need to be able to generate
// multiple events here, for example
// if two fingers change up/down state
// at the same time.
do {
me = ms.generateAbsMotion(di, curTime,
curTimeNano, mDisplay,
mOrientation, mGlobalMetaState);
if (DEBUG_POINTERS) Log.v(TAG, "Absolute: x="
+ di.mAbs.mNextData[MotionEvent.SAMPLE_X]
+ " y="
+ di.mAbs.mNextData[MotionEvent.SAMPLE_Y]
+ " ev=" + me);
if (me != null) {
if (WindowManagerPolicy.WATCH_POINTER) {
Log.i(TAG, "Enqueueing: " + me);
}
addLocked(di, curTimeNano, ev.flags,
RawInputEvent.CLASS_TOUCHSCREEN, me);
}
} while (ms.hasMore());
} else {
// We are consuming movement in the
// virtual key area... but still
// propagate this to the previous
// data for comparisons.
int num = ms.mNextNumPointers;
if (num > InputDevice.MAX_POINTERS) {
num = InputDevice.MAX_POINTERS;
}
System.arraycopy(ms.mNextData, 0,
ms.mLastData, 0,
num * MotionEvent.NUM_SAMPLE_DATA);
ms.mLastNumPointers = num;
ms.mSkipLastPointers = true;
}
ms.finish();
}
ms = di.mRel;
if (ms.changed) {
ms.changed = false;
me = ms.generateRelMotion(di, curTime,
curTimeNano,
mOrientation, mGlobalMetaState);
if (false) Log.v(TAG, "Relative: x="
+ di.mRel.mNextData[MotionEvent.SAMPLE_X]
+ " y="
+ di.mRel.mNextData[MotionEvent.SAMPLE_Y]
+ " ev=" + me);
if (me != null) {
addLocked(di, curTimeNano, ev.flags,
RawInputEvent.CLASS_TRACKBALL, me);
}
ms.finish();
}
}
}
}
} catch (RuntimeException exc) {
Log.e(TAG, "InputReaderThread uncaught exception", exc);
}
}
}
};
private static native boolean readEvent(RawInputEvent outEvent);
framworks.base.server.jni
static jboolean
android_server_KeyInputQueue_readEvent(JNIEnv* env, jobject clazz,
jobject event)
{
gLock.lock();
sp<EventHub> hub = gHub;
if (hub == NULL) {
hub = new EventHub;
gHub = hub;
}
gLock.unlock();
int32_t deviceId;
int32_t type;
int32_t scancode, keycode;
uint32_t flags;
int32_t value;
nsecs_t when;
bool res = hub->getEvent(&deviceId, &type, &scancode, &keycode,
&flags, &value, &when);
env->SetIntField(event, gInputOffsets.mDeviceId, (jint)deviceId);
env->SetIntField(event, gInputOffsets.mType, (jint)type);
env->SetIntField(event, gInputOffsets.mScancode, (jint)scancode);
env->SetIntField(event, gInputOffsets.mKeycode, (jint)keycode);
env->SetIntField(event, gInputOffsets.mFlags, (jint)flags);
env->SetIntField(event, gInputOffsets.mValue, value);
env->SetLongField(event, gInputOffsets.mWhen,
(jlong)(nanoseconds_to_milliseconds(when)));
return res;
}
InputDispatcherThread从KeyQ中读取Events，找到Window Manager中的Focus Window，通过Focus Window记录的mClient接口，将Events专递到Client端。Client端在根据自己的Focus Path传递事件，直到事件被处理。
private final class InputDispatcherThread extends Thread {
// Time to wait when there is nothing to do: 9999 seconds.
static final int LONG_WAIT=9999*1000;
public InputDispatcherThread() {
super("InputDispatcher");
}
@Override
public void run() {
while (true) {
try {
process();
} catch (Exception e) {
Log.e(TAG, "Exception in input dispatcher", e);
}
}
}
private void process() {
android.os.Process.setThreadPriority(
android.os.Process.THREAD_PRIORITY_URGENT_DISPLAY);
// The last key event we saw
KeyEvent lastKey = null;
// Last keydown time for auto-repeating keys
long lastKeyTime = SystemClock.uptimeMillis();
long nextKeyTime = lastKeyTime+LONG_WAIT;
long downTime = 0;
// How many successive repeats we generated
int keyRepeatCount = 0;
// Need to report that configuration has changed?
boolean configChanged = false;
while (true) {
long curTime = SystemClock.uptimeMillis();
if (DEBUG_INPUT) Log.v(
TAG, "Waiting for next key: now=" + curTime
+ ", repeat @ " + nextKeyTime);
// Retrieve next event, waiting only as long as the next
// repeat timeout. If the configuration has changed, then
// don't wait at all -- we'll report the change as soon as
// we have processed all events.
QueuedEvent ev = mQueue.getEvent(
(int)((!configChanged && curTime < nextKeyTime)
? (nextKeyTime-curTime) : 0));
if (DEBUG_INPUT && ev != null) Log.v(
TAG, "Event: type=" + ev.classType + " data=" + ev.event);
if (MEASURE_LATENCY) {
lt.sample("2 got event ", System.nanoTime() - ev.whenNano);
}
if (lastKey != null && !mPolicy.allowKeyRepeat()) {
// cancel key repeat at the request of the policy.
lastKey = null;
downTime = 0;
lastKeyTime = curTime;
nextKeyTime = curTime + LONG_WAIT;
}
try {
if (ev != null) {
curTime = SystemClock.uptimeMillis();
int eventType;
if (ev.classType == RawInputEvent.CLASS_TOUCHSCREEN) {
eventType = eventType((MotionEvent)ev.event);
} else if (ev.classType == RawInputEvent.CLASS_KEYBOARD ||
ev.classType == RawInputEvent.CLASS_TRACKBALL) {
eventType = LocalPowerManager.BUTTON_EVENT;
} else {
eventType = LocalPowerManager.OTHER_EVENT;
}
try {
if ((curTime - mLastBatteryStatsCallTime)
>= MIN_TIME_BETWEEN_USERACTIVITIES) {
mLastBatteryStatsCallTime = curTime;
mBatteryStats.noteInputEvent();
}
} catch (RemoteException e) {
// Ignore
}
if (eventType != TOUCH_EVENT
&& eventType != LONG_TOUCH_EVENT
&& eventType != CHEEK_EVENT) {
mPowerManager.userActivity(curTime, false,
eventType, false);
} else if (mLastTouchEventType != eventType
|| (curTime - mLastUserActivityCallTime)
>= MIN_TIME_BETWEEN_USERACTIVITIES) {
mLastUserActivityCallTime = curTime;
mLastTouchEventType = eventType;
mPowerManager.userActivity(curTime, false,
eventType, false);
}
switch (ev.classType) {
case RawInputEvent.CLASS_KEYBOARD:
KeyEvent ke = (KeyEvent)ev.event;
if (ke.isDown()) {
lastKey = ke;
downTime = curTime;
keyRepeatCount = 0;
lastKeyTime = curTime;
nextKeyTime = lastKeyTime
+ ViewConfiguration.getLongPressTimeout();
//a21966,Creekside: if it is a SLIDER close event do not wait the key up event
if (ke.getScanCode() == 254){
lastKey = null;
downTime = 0;
lastKeyTime = curTime;
nextKeyTime = curTime + LONG_WAIT;
}
if (DEBUG_INPUT) Log.v(
TAG, "Received key down: first repeat @ "
+ nextKeyTime);
} else {
lastKey = null;
downTime = 0;
// Arbitrary long timeout.
lastKeyTime = curTime;
nextKeyTime = curTime + LONG_WAIT;
if (DEBUG_INPUT) Log.v(
TAG, "Received key up: ignore repeat @ "
+ nextKeyTime);
}
dispatchKey((KeyEvent)ev.event, 0, 0);
mQueue.recycleEvent(ev);
break;
case RawInputEvent.CLASS_TOUCHSCREEN:
//Log.i(TAG, "Read next event " + ev);
dispatchPointer(ev, (MotionEvent)ev.event, 0, 0);
break;
case RawInputEvent.CLASS_TRACKBALL:
dispatchTrackball(ev, (MotionEvent)ev.event, 0, 0);
break;
case RawInputEvent.CLASS_CONFIGURATION_CHANGED:
configChanged = true;
break;
default:
mQueue.recycleEvent(ev);
break;
}
} else if (configChanged) {
configChanged = false;
sendNewConfiguration();
} else if (lastKey != null) {
curTime = SystemClock.uptimeMillis();
// Timeout occurred while key was down. If it is at or
// past the key repeat time, dispatch the repeat.
if (DEBUG_INPUT) Log.v(
TAG, "Key timeout: repeat=" + nextKeyTime
+ ", now=" + curTime);
if (curTime < nextKeyTime) {
continue;
}
lastKeyTime = nextKeyTime;
nextKeyTime = nextKeyTime + KEY_REPEAT_DELAY;
keyRepeatCount++;
if (DEBUG_INPUT) Log.v(
TAG, "Key repeat: count=" + keyRepeatCount
+ ", next @ " + nextKeyTime);
KeyEvent newEvent;
if (downTime != 0 && (downTime
+ ViewConfiguration.getLongPressTimeout())
<= curTime) {
newEvent = KeyEvent.changeTimeRepeat(lastKey,
curTime, keyRepeatCount,
lastKey.getFlags() | KeyEvent.FLAG_LONG_PRESS);
downTime = 0;
} else {
newEvent = KeyEvent.changeTimeRepeat(lastKey,
curTime, keyRepeatCount);
}
dispatchKey(newEvent, 0, 0);
} else {
curTime = SystemClock.uptimeMillis();
lastKeyTime = curTime;
nextKeyTime = curTime + LONG_WAIT;
}
} catch (Exception e) {
Log.e(TAG,
"Input thread received uncaught exception: " + e, e);
}
}
}
}
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发表评论
-
android API对应版本号及甜品
2014-10-11 22:20 1Android版本名和API Level关系全称 ... -
Android shareperference 多线程并发读写
2014-10-11 21:56 0TBD -
Android多线程之控制animation走走停停
2011-09-20 12:50 2354原创文章，转载请标注出处---- 首先，定义一个rot ... -
有人对研究Android 平台上H264感兴趣的么?
2011-07-16 20:18 822RT，感兴趣的一起交流，邮件：waterlife2001@12 ... -
一个comment导致的Android import编译错误
2011-06-12 08:43 1125日前，因为需要修改了Google android自带的prov ... -
Android Framework系列之IPC（二）
2010-11-08 20:03 1979对于Android的IPC来说，除了Handler和Loope ... -
Android Framework系列之IPC（一）
2010-11-05 19:46 3217原创文章，转载请标注出处---- 说到Android的 ... -
Android Framework系列之IMF（三）
2010-11-01 20:55 5204原创文章，转载请标注出处---- 我们知道当一个编辑框 ... -
Android Framework系列之IMF（二）
2010-10-14 22:01 4437原创文章，转载请标注出处---- InputConne ... -
Android Framework系列之IMF（一）
2010-10-12 21:41 3892原创文章，转载请标注出处---- IMF（Input ...
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总的来说，处理Android输入法显示与隐藏对布局的影响，需要综合运用`InputMethodManager`、`windowSoftInputMode`以及键盘监听等技术。理解这些机制并灵活运用，能够提升应用的用户体验，避免因键盘遮挡问题导致的...
2. Input Method (IME)：界面和输入法引擎，处理用户的输入。IME 可以是软键盘、CJK 输入法、拼音输入法等。 3. Client Applications：传递一些信息，IMM 用来决定焦点和 IME 状态。Client Applications 包括各种 ...
通过研究这份源码，开发者不仅可以学习到Android输入法的实现原理，还能提升自己的Java编程技巧和对Android系统的深入理解。对于想要在Android平台开发创新输入法应用或者增强现有应用输入体验的开发者来说，这是一...
在Android系统中，全键盘输入法是用户与设备交互的重要组成部分，特别是在移动设备上，它提供了文字输入的方式。本文将深入探讨"android 全键盘输入法源码"的相关知识点，帮助开发者理解输入法的工作原理，并从中...
首先，我们要理解Android系统中输入法键盘的生命周期。在用户点击EditText控件时，系统会自动弹出键盘，而当用户点击屏幕其他区域或按下返回键时，键盘通常会收起。我们可以监听这些事件来判断键盘的状态，但更准确...
Android 输入法原理是 Android 操作系统中一个核心组件，负责处理用户输入的所有操作。作为一个 Service，输入法在 Android 中扮演着非常重要的角色。下面，我们将对 Android 输入法原理进行详细介绍，让您快速掌握...
- Android系统有多种版本，输入法需兼容不同的设备和Android版本，可能需要处理API级别差异和屏幕尺寸适应。 7. **性能优化**： - 对于大量数据的查询和预测，如车牌号数据库操作，需要进行性能优化，避免延迟...
通过这个简单的输入法源代码，开发者可以了解Android输入法的基本工作原理，理解如何与系统进行交互，以及如何处理用户输入。此外，这也是一个很好的起点，可以在此基础上添加更多高级功能，如拼音输入、语音输入、...
在Android系统中，内置输入法是用户与设备交互的关键组件之一。Android 7.1.2版本中的内置搜狐输入法提供了高效、智能的文本输入体验，尤其针对中文用户设计。这款输入法集成了SogouInput.apk和Android.mk文件，它们...
通过以上介绍，我们可以看到Android输入法的实现不仅涉及到Android系统内部的工作原理，还需要开发者具备一定的底层开发能力。理解这些细节有助于开发者更好地设计和优化输入法产品，为用户提供更加流畅和个性化的...
这个压缩包可能包含了一个完整的Android输入法应用的源代码，名为"PinyinIME"，专门用于拼音输入。 【描述分析】 描述提到，这是一个"安卓输入法源码"，意味着它包含了编写Android输入法应用的所有源代码文件。源码...
这份"android输入法手势程序源码"是一个很好的学习资源，可以帮助开发者深入了解手势识别技术和如何将其应用于Android应用中。下面将详细探讨相关知识点。 一、Android手势输入 1. **手势识别库**：Android系统...
基于Android的输入法系统设计与实现旨在创造一个高效、用户友好的输入解决方案，以满足不同用户的输入需求。 设计内容主要涉及以下几个方面： 1. 用户界面（UI）设计：输入法界面需要简洁、直观，方便用户快速切换...