有人可以帮我理解或指导一些有关如何创建表情符号以及它们如何在Android上运行的阅读材料吗？
我需要从外行与程序化的角度来了解整个过程。
答案 0 :(得分：4)
我们无法创建自己的custom emoticons for generic keyboard in android。因为这些图像存储在form of codes中。 facebook,skype and other可能无法实施。我们必须遵循emoticons See list，
如果您想在自己的应用中使用它们。使用this
请参阅SoftKeyboard sample here
答案 1 :(得分：3)
请参阅文章：https://www.androidhive.info/2016/11/android-integrate-emojis-keyboard-app/ 了解表情符号的工作原理以及如何为您的应用程序实现表情符号功能。
请参阅文章：https://apps.timwhitlock.info/emoji/tables/unicode 确定表情符号的unicode。
你可以从键盘输入表情符号。根据您的要求调整大小。对于旋转和翻转支持，您可以使用布局，持有表情符号。
答案 2 :(得分：1)
使用自定义库： https://github.com/rockerhieu/emojicon
public class EmojiKeyboard {
private static final String TAG = "EmojiKeyboard";
private static final String PREF_KEY_HEIGHT_KB = "EmojiKbHeight";
private Context context;
private int screenHeight = -1;
private int emojiKbHeight = -1;
private PopupWindow emojiKeyboardPopup;
private View view;
private SharedPreferences preferences;
public EmojiKeyboard(Context context, View view) {
if (context instanceof Activity) {
this.context = context;
this.view = view;
preferences = context.getSharedPreferences(context.getString(R.string.app_name), Context.MODE_PRIVATE);
//Restore EmojiKeyboard Height
emojiKbHeight = preferences.getInt(PREF_KEY_HEIGHT_KB, -1);
//TODO support less then 11 API, and not perfect resizing when switched the keyboard
view.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
/*
* Get root view height
* */
screenHeight = screenHeight == -1 && bottom > oldBottom
? bottom
: screenHeight;
/*
* Calculate soft keyboard height
* */
int dHeight = oldBottom - bottom;
boolean validHeight = emojiKbHeight == -1 && dHeight > 80 && bottom != oldBottom;
/*
* Сheck twice because the keyboard may have been switched
* */
emojiKbHeight = validHeight
? dHeight : emojiKbHeight != (dHeight) && dHeight > 0
? dHeight
: emojiKbHeight;
/*
* Store emoji keyboard height into SharedPreferences
* */
preferences.edit().putInt(PREF_KEY_HEIGHT_KB, emojiKbHeight).commit();
/*
* If layout returned to a standard height then dismissing keyboard (OnBackPressed)
* */
if (screenHeight == bottom) {
dismissEmojiKeyboard();
}
/*
* Resize emoji on the go when a user switches between keyboards
* */
resizeEmoji();
}
});
}
}
public void showEmoji() {
if (emojiKeyboardPopup == null) {
createEmojiKeyboard();
}
if (!isShowed()) {
new Handler().postDelayed(new Runnable() {
public void run() {
emojiKeyboardPopup.showAtLocation(view, Gravity.BOTTOM, 0, 0);
resizeEmoji();
}
}, 10L);
} else {
dismissEmojiKeyboard();
}
}
public void createEmojiKeyboard() {
EmojiView emojiKeyboard = new EmojiView(context, EmojiView.EMOJI_DARK_STYLE, new EmojiView.onEmojiClickListener() {
public void onBackspace() {
if (((Activity) context).getWindow().getCurrentFocus() instanceof EditText) {
((Activity) context).getWindow().getCurrentFocus().dispatchKeyEvent(new KeyEvent(0, 67));
}
}
public void onEmojiSelected(Emojicon emojicon) {
if (((Activity) context).getWindow().getCurrentFocus() instanceof EditText) {
EmojiView.input((EditText) ((Activity) context).getWindow().getCurrentFocus(), emojicon);
}
}
});
emojiKeyboardPopup = new PopupWindow(emojiKeyboard);
emojiKeyboardPopup.setHeight(View.MeasureSpec.makeMeasureSpec(setEmojiKeyboardHeight(), View.MeasureSpec.EXACTLY));
emojiKeyboardPopup.setWidth(View.MeasureSpec.makeMeasureSpec(getDisplayDimensions(context).x, View.MeasureSpec.EXACTLY));
emojiKeyboardPopup.setAnimationStyle(0);
}
public void dismissEmojiKeyboard() {
if (isShowed()) {
emojiKeyboardPopup.dismiss();
}
}
public boolean isShowed() {
return emojiKeyboardPopup != null && emojiKeyboardPopup.isShowing();
}
/*
* Emoji set up size
* */
public void resizeEmoji() {
if (isShowed()) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
WindowManager.LayoutParams layoutParams = (WindowManager.LayoutParams) emojiKeyboardPopup.getContentView().getLayoutParams();
layoutParams.height = setEmojiKeyboardHeight();
wm.updateViewLayout(emojiKeyboardPopup.getContentView(), layoutParams);
}
}
public int setEmojiKeyboardHeight() {
return emojiKbHeight == -1 && emojiKbHeight != screenHeight && emojiKbHeight < 80
? (getDisplayDimensions(context).y / 2)
: emojiKbHeight;
}
public Point getDisplayDimensions(Context context) {
Point size = new Point();
WindowManager w = ((Activity) context).getWindowManager();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
w.getDefaultDisplay().getSize(size);
} else {
Display d = w.getDefaultDisplay();
size.x = d.getWidth();
size.y = d.getHeight();
}
return size;
}
}
答案 3 :(得分：0)
使用lib github https://github.com/rockerhieu/emojicon
public class EmojiKeyboard {
private static final String TAG = "EmojiKeyboard";
private static final String PREF_KEY_HEIGHT_KB = "EmojiKbHeight";
private Context context;
private int screenHeight = -1;
private int emojiKbHeight = -1;
private PopupWindow emojiKeyboardPopup;
private View view;
private SharedPreferences preferences;
public EmojiKeyboard(Context context, View view) {
if (context instanceof Activity) {
this.context = context;
this.view = view;
preferences = context.getSharedPreferences(context.getString(R.string.app_name), Context.MODE_PRIVATE);
//Restore EmojiKeyboard Height
emojiKbHeight = preferences.getInt(PREF_KEY_HEIGHT_KB, -1);
//TODO support less then 11 API, and not perfect resizing when switched the keyboard
view.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
/*
* Get root view height
* */
screenHeight = screenHeight == -1 && bottom > oldBottom
? bottom
: screenHeight;
/*
* Calculate soft keyboard height
* */
int dHeight = oldBottom - bottom;
boolean validHeight = emojiKbHeight == -1 && dHeight > 80 && bottom != oldBottom;
/*
* Сheck twice because the keyboard may have been switched
* */
emojiKbHeight = validHeight
? dHeight : emojiKbHeight != (dHeight) && dHeight > 0
? dHeight
: emojiKbHeight;
/*
* Store emoji keyboard height into SharedPreferences
* */
preferences.edit().putInt(PREF_KEY_HEIGHT_KB, emojiKbHeight).commit();
/*
* If layout returned to a standard height then dismissing keyboard (OnBackPressed)
* */
if (screenHeight == bottom) {
dismissEmojiKeyboard();
}
/*
* Resize emoji on the go when a user switches between keyboards
* */
resizeEmoji();
}
});
}
}
public void showEmoji() {
if (emojiKeyboardPopup == null) {
createEmojiKeyboard();
}
if (!isShowed()) {
new Handler().postDelayed(new Runnable() {
public void run() {
emojiKeyboardPopup.showAtLocation(view, Gravity.BOTTOM, 0, 0);
resizeEmoji();
}
}, 10L);
} else {
dismissEmojiKeyboard();
}
}
public void createEmojiKeyboard() {
EmojiView emojiKeyboard = new EmojiView(context, EmojiView.EMOJI_DARK_STYLE, new EmojiView.onEmojiClickListener() {
public void onBackspace() {
if (((Activity) context).getWindow().getCurrentFocus() instanceof EditText) {
((Activity) context).getWindow().getCurrentFocus().dispatchKeyEvent(new KeyEvent(0, 67));
}
}
public void onEmojiSelected(Emojicon emojicon) {
if (((Activity) context).getWindow().getCurrentFocus() instanceof EditText) {
EmojiView.input((EditText) ((Activity) context).getWindow().getCurrentFocus(), emojicon);
}
}
});
emojiKeyboardPopup = new PopupWindow(emojiKeyboard);
emojiKeyboardPopup.setHeight(View.MeasureSpec.makeMeasureSpec(setEmojiKeyboardHeight(), View.MeasureSpec.EXACTLY));
emojiKeyboardPopup.setWidth(View.MeasureSpec.makeMeasureSpec(getDisplayDimensions(context).x, View.MeasureSpec.EXACTLY));
emojiKeyboardPopup.setAnimationStyle(0);
}
public void dismissEmojiKeyboard() {
if (isShowed()) {
emojiKeyboardPopup.dismiss();
}
}
public boolean isShowed() {
return emojiKeyboardPopup != null && emojiKeyboardPopup.isShowing();
}
/*
* Emoji set up size
* */
public void resizeEmoji() {
if (isShowed()) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
WindowManager.LayoutParams layoutParams = (WindowManager.LayoutParams) emojiKeyboardPopup.getContentView().getLayoutParams();
layoutParams.height = setEmojiKeyboardHeight();
wm.updateViewLayout(emojiKeyboardPopup.getContentView(), layoutParams);
}
}
public int setEmojiKeyboardHeight() {
return emojiKbHeight == -1 && emojiKbHeight != screenHeight && emojiKbHeight < 80
? (getDisplayDimensions(context).y / 2)
: emojiKbHeight;
}
public Point getDisplayDimensions(Context context) {
Point size = new Point();
WindowManager w = ((Activity) context).getWindowManager();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
w.getDefaultDisplay().getSize(size);
} else {
Display d = w.getDefaultDisplay();
size.x = d.getWidth();
size.y = d.getHeight();
}
return size;
}
}