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src/net/micode/notes/ui/NoteEditText.java
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@ -14,204 +14,273 @@
* limitations under the License.
*/
package net.micode.notes.ui;
import android.content.Context;
import android.graphics.Rect;
import android.text.Layout;
import android.text.Selection;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.URLSpan;
import android.util.AttributeSet;
import android.util.Log;
import android.view.ContextMenu;
import android.view.KeyEvent;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.MotionEvent;
import android.widget.EditText;
import net.micode.notes.R;
import java.util.HashMap;
import java.util.Map;
public class NoteEditText extends EditText {
private static final String TAG = "NoteEditText";
private int mIndex;
private int mSelectionStartBeforeDelete;
private static final String SCHEME_TEL = "tel:" ;
private static final String SCHEME_HTTP = "http:" ;
private static final String SCHEME_EMAIL = "mailto:" ;
private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
static {
sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);
sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web);
sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email);
}
/**
* Call by the {@link NoteEditActivity} to delete or add edit text
*/
public interface OnTextViewChangeListener {
/**
* Delete current edit text when {@link KeyEvent#KEYCODE_DEL} happens
* and the text is null
*/
void onEditTextDelete(int index, String text);
/**
* Add edit text after current edit text when {@link KeyEvent#KEYCODE_ENTER}
* happen
*/
void onEditTextEnter(int index, String text);
/**
* Hide or show item option when text change
*/
void onTextChange(int index, boolean hasText);
}
private OnTextViewChangeListener mOnTextViewChangeListener;
public NoteEditText(Context context) {
super(context, null);
mIndex = 0;
}
public void setIndex(int index) {
mIndex = index;
}
public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
mOnTextViewChangeListener = listener;
}
public NoteEditText(Context context, AttributeSet attrs) {
super(context, attrs, android.R.attr.editTextStyle);
}
public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
int x = (int) event.getX();
int y = (int) event.getY();
x -= getTotalPaddingLeft();
y -= getTotalPaddingTop();
x += getScrollX();
y += getScrollY();
Layout layout = getLayout();
int line = layout.getLineForVertical(y);
int off = layout.getOffsetForHorizontal(line, x);
Selection.setSelection(getText(), off);
break;
}
return super.onTouchEvent(event);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_ENTER:
if (mOnTextViewChangeListener != null) {
return false;
}
break;
case KeyEvent.KEYCODE_DEL:
mSelectionStartBeforeDelete = getSelectionStart();
break;
default:
break;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
switch(keyCode) {
case KeyEvent.KEYCODE_DEL:
if (mOnTextViewChangeListener != null) {
if (0 == mSelectionStartBeforeDelete && mIndex != 0) {
mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
return true;
}
} else {
Log.d(TAG, "OnTextViewChangeListener was not seted");
}
break;
case KeyEvent.KEYCODE_ENTER:
if (mOnTextViewChangeListener != null) {
int selectionStart = getSelectionStart();
String text = getText().subSequence(selectionStart, length()).toString();
setText(getText().subSequence(0, selectionStart));
mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);
} else {
Log.d(TAG, "OnTextViewChangeListener was not seted");
}
break;
default:
break;
}
return super.onKeyUp(keyCode, event);
}
@Override
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
if (mOnTextViewChangeListener != null) {
if (!focused && TextUtils.isEmpty(getText())) {
mOnTextViewChangeListener.onTextChange(mIndex, false);
} else {
mOnTextViewChangeListener.onTextChange(mIndex, true);
}
}
super.onFocusChanged(focused, direction, previouslyFocusedRect);
}
@Override
protected void onCreateContextMenu(ContextMenu menu) {
if (getText() instanceof Spanned) {
int selStart = getSelectionStart();
int selEnd = getSelectionEnd();
int min = Math.min(selStart, selEnd);
int max = Math.max(selStart, selEnd);
final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
if (urls.length == 1) {
int defaultResId = 0;
for(String schema: sSchemaActionResMap.keySet()) {
if(urls[0].getURL().indexOf(schema) >= 0) {
defaultResId = sSchemaActionResMap.get(schema);
break;
}
}
if (defaultResId == 0) {
defaultResId = R.string.note_link_other;
}
menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
new OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
// goto a new intent
urls[0].onClick(NoteEditText.this);
return true;
}
});
}
}
super.onCreateContextMenu(menu);
}
}
package net.micode.notes.ui;
import android.content.Context;
import android.graphics.Rect;
import android.text.Layout;
import android.text.Selection;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.URLSpan;
import android.util.AttributeSet;
import android.util.Log;
import android.view.ContextMenu;
import android.view.KeyEvent;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.MotionEvent;
import android.widget.EditText;
import net.micode.notes.R;
import java.util.HashMap;
import java.util.Map;
/**
* 自定义EditText组件，用于小米便签应用中的文本编辑功能
* 支持链接识别、回车键和删除键的特殊处理以及上下文菜单定制
*/
public class NoteEditText extends EditText {
private static final String TAG = "NoteEditText";
private int mIndex; // 当前编辑框在便签中的索引位置
private int mSelectionStartBeforeDelete; // 删除操作前的光标位置
// 支持的链接协议
private static final String SCHEME_TEL = "tel:" ;
private static final String SCHEME_HTTP = "http:" ;
private static final String SCHEME_EMAIL = "mailto:" ;
// 协议与菜单项资源ID的映射
private static final Map<String, Integer> sSchemaActionResMap = new HashMap<String, Integer>();
static {
sSchemaActionResMap.put(SCHEME_TEL, R.string.note_link_tel);
sSchemaActionResMap.put(SCHEME_HTTP, R.string.note_link_web);
sSchemaActionResMap.put(SCHEME_EMAIL, R.string.note_link_email);
}
/**
* 文本视图变化监听器接口
* 用于与NoteEditActivity通信，处理编辑框的添加、删除和文本变化事件
*/
public interface OnTextViewChangeListener {
/**
* 当按下删除键且文本为空时，删除当前编辑框
* @param index 当前编辑框的索引
* @param text 当前编辑框的文本内容
*/
void onEditTextDelete(int index, String text);
/**
* 当按下回车键时，在当前编辑框后添加新的编辑框
* @param index 新编辑框的索引位置
* @param text 当前编辑框中回车键后的剩余文本
*/
void onEditTextEnter(int index, String text);
/**
* 当文本内容变化时，隐藏或显示菜单项
* @param index 当前编辑框的索引
* @param hasText 是否有文本内容
*/
void onTextChange(int index, boolean hasText);
}
private OnTextViewChangeListener mOnTextViewChangeListener; // 文本变化监听器
/**
* 构造函数，用于在代码中创建NoteEditText实例
* @param context 应用上下文
*/
public NoteEditText(Context context) {
super(context, null);
mIndex = 0;
}
/**
* 设置编辑框的索引位置
* @param index 索引值
*/
public void setIndex(int index) {
mIndex = index;
}
/**
* 设置文本变化监听器
* @param listener 实现了OnTextViewChangeListener接口的监听器
*/
public void setOnTextViewChangeListener(OnTextViewChangeListener listener) {
mOnTextViewChangeListener = listener;
}
/**
* 构造函数，用于在XML布局文件中创建NoteEditText实例
* @param context 应用上下文
* @param attrs 属性集合
*/
public NoteEditText(Context context, AttributeSet attrs) {
super(context, attrs, android.R.attr.editTextStyle);
}
/**
* 构造函数，使用指定的样式资源
* @param context 应用上下文
* @param attrs 属性集合
* @param defStyle 样式资源ID
*/
public NoteEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
/**
* 处理触摸事件，确保点击位置能正确定位到文本
* @param event 触摸事件
* @return 是否处理了该事件
*/
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// 计算触摸点在文本中的位置并设置光标
int x = (int) event.getX();
int y = (int) event.getY();
x -= getTotalPaddingLeft();
y -= getTotalPaddingTop();
x += getScrollX();
y += getScrollY();
Layout layout = getLayout();
int line = layout.getLineForVertical(y);
int off = layout.getOffsetForHorizontal(line, x);
Selection.setSelection(getText(), off);
break;
}
return super.onTouchEvent(event);
}
/**
* 处理按键按下事件
* @param keyCode 按键码
* @param event 按键事件
* @return 是否处理了该事件
*/
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_ENTER:
// 如果设置了监听器，让监听器处理回车键事件
if (mOnTextViewChangeListener != null) {
return false;
}
break;
case KeyEvent.KEYCODE_DEL:
// 记录删除操作前的光标位置
mSelectionStartBeforeDelete = getSelectionStart();
break;
default:
break;
}
return super.onKeyDown(keyCode, event);
}
/**
* 处理按键释放事件
* @param keyCode 按键码
* @param event 按键事件
* @return 是否处理了该事件
*/
@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
switch(keyCode) {
case KeyEvent.KEYCODE_DEL:
// 处理删除键事件：如果光标在文本开头且不是第一个编辑框，则删除当前编辑框
if (mOnTextViewChangeListener != null) {
if (0 == mSelectionStartBeforeDelete && mIndex != 0) {
mOnTextViewChangeListener.onEditTextDelete(mIndex, getText().toString());
return true;
}
} else {
Log.d(TAG, "OnTextViewChangeListener was not seted");
}
break;
case KeyEvent.KEYCODE_ENTER:
// 处理回车键事件：将文本分割并在当前编辑框后添加新的编辑框
if (mOnTextViewChangeListener != null) {
int selectionStart = getSelectionStart();
String text = getText().subSequence(selectionStart, length()).toString();
setText(getText().subSequence(0, selectionStart));
mOnTextViewChangeListener.onEditTextEnter(mIndex + 1, text);
} else {
Log.d(TAG, "OnTextViewChangeListener was not seted");
}
break;
default:
break;
}
return super.onKeyUp(keyCode, event);
}
/**
* 焦点变化时的回调方法
* @param focused 是否获得焦点
* @param direction 焦点移动方向
* @param previouslyFocusedRect 之前焦点所在的矩形区域
*/
@Override
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
// 通知监听器文本内容状态变化
if (mOnTextViewChangeListener != null) {
if (!focused && TextUtils.isEmpty(getText())) {
mOnTextViewChangeListener.onTextChange(mIndex, false);
} else {
mOnTextViewChangeListener.onTextChange(mIndex, true);
}
}
super.onFocusChanged(focused, direction, previouslyFocusedRect);
}
/**
* 创建上下文菜单时的回调方法
* @param menu 上下文菜单
*/
@Override
protected void onCreateContextMenu(ContextMenu menu) {
// 检查选中文本中是否包含链接，如果包含则添加对应的菜单项
if (getText() instanceof Spanned) {
int selStart = getSelectionStart();
int selEnd = getSelectionEnd();
int min = Math.min(selStart, selEnd);
int max = Math.max(selStart, selEnd);
final URLSpan[] urls = ((Spanned) getText()).getSpans(min, max, URLSpan.class);
if (urls.length == 1) {
int defaultResId = 0;
// 根据链接协议选择对应的菜单项文本
for(String schema: sSchemaActionResMap.keySet()) {
if(urls[0].getURL().indexOf(schema) >= 0) {
defaultResId = sSchemaActionResMap.get(schema);
break;
}
}
if (defaultResId == 0) {
defaultResId = R.string.note_link_other;
}
// 添加菜单项并设置点击事件
menu.add(0, 0, 0, defaultResId).setOnMenuItemClickListener(
new OnMenuItemClickListener() {
public boolean onMenuItemClick(MenuItem item) {
// 打开链接
urls[0].onClick(NoteEditText.this);
return true;
}
});
}
}
super.onCreateContextMenu(menu);
}
}
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