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[J2ME]觸摸屏功能實現代碼一

觸摸屏功能的實現大致來說要在三處添加代碼：
1.在Screen類中重寫觸摸功能；
2.建立一個觸摸屏對象，使要實現觸摸功能的控件以對象的方式保存在Vector中；
3.在獲取頁面時，把要實現的觸摸控件保存在Vector中；

以項目中的源碼為例，這三個部分的代碼如下：

1.Screen類：
（本源碼最后兩個方法為：字符占屏幕寬度及高度的計算方法）

/**

* Data：2010.02.25

* Time：15：18：20

package com.xuudoo.ewl;

import java.util.Vector;

import javax.microedition.lcdui.Canvas;

import javax.microedition.lcdui.Command;

import javax.microedition.lcdui.CommandListener;

import javax.microedition.lcdui.Display;

import javax.microedition.lcdui.Displayable;

import javax.microedition.lcdui.Font;

import javax.microedition.lcdui.Graphics;

import javax.microedition.lcdui.Image;

import javax.microedition.midlet.MIDlet;

import com.xuudoo.booking.BizWindow;

import com.xuudoo.booking.BookingMidlet;

import com.xuudoo.booking.BusinessWindow;

import com.xuudoo.booking.FirstPage;

import com.xuudoo.booking.IOManager;

import com.xuudoo.booking.UIManager;

public class EWLScreen extends Canvas // FullCanvas

implements CommandListener {

public static final int SCREEN_WIDTH = 360;//屏寬

public static final int SCREEN_HEIGHT = 640;//屏高

public static final int KEY_CODE_LEFT_SOFT_KEY = -6;//左軟鍵

public static final int KEY_CODE_RIGHT_SOFT_KEY = -7;//右軟鍵

public static EWLScreen instance = new EWLScreen();

public static Display display;

protected EWLWindow activeWindow;

protected EWLWindow popupWindow;

public static Image splashImg = null;//初始化圖片

private static String splashImgPath = "/LogoXD.png";//初始化圖片地址

public static Image main_bg = null;//背景圖片

private static String main_bgPath = "/bg.png";//背景圖片地址

public static boolean connectAgain = false;//用cmnet聯網失敗后再連接

public static boolean connectPrompt = true;//第一此聯網詢問時是否連接網絡

public static boolean phoneNoMoney = false;//手機欠費標志位

public EWLScreen() {

setFullScreenMode(true);

}

public static void init(MIDlet midlet) {

display = Display.getDisplay(midlet);

instance.iniLogoPic();

}

public int getHeight() {

return SCREEN_HEIGHT;

}

public int getWidth() {

return SCREEN_WIDTH;

}

/**

* 第一次登陸，畫Logo登錄圖片

public void iniLogoPic() {

//圖片資源

try{

splashImg = Image.createImage(splashImgPath);

main_bg = Image.createImage(main_bgPath);

}catch(Exception e)

{

if(BookingMidlet.DEBUG)

e.printStackTrace();

}

//調試時顯示信息之用

public static String prompt1 = null;

public static String prompt2 = null;

public static String prompt3 = null;

protected void paint(Graphics g) {

//登陸時的提示界面

if(UIManager.state == UIManager.STATE_LOGIN){

if(splashImg != null)

// g.drawImage(splashImg, (EWLScreen.SCREEN_WIDTH - splashImg.getWidth()) / 2,

// (EWLScreen.SCREEN_HEIGHT - splashImg.getHeight()) / 2, 20);

g.drawImage(splashImg, 0,0, 20);

drawConnectPrompt(g);//畫提示信息

String leftSoftStr="登陸";

if(connectAgain)

leftSoftStr=null;

this.drawSoftKeys(g, leftSoftStr, "退出", 0xff0000);//畫提示界面左右軟鍵

return;

}else{

// if(main_bg != null)

// g.drawImage(main_bg,0,0,20);

if (activeWindow != null){

activeWindow.paint(g);

}

if (popupWindow != null){

popupWindow.paint(g);

}

//-----------------------調試信息-----------------------------

// g.setColor(0xff0000);

// if(prompt1 != null )

// g.drawString(prompt1, 10, 260, 0);

// if(prompt2 != null )

// g.drawString(prompt2, 10, 280, 0);

// if(prompt3 != null )

// g.drawString(prompt3, 10, 240, 0);

}

/**

* 畫聯網提示，并兼容原來系統的字體和顏色

private void drawConnectPrompt(Graphics g){

int nowColor = g.getColor();

Font nowFont = g.getFont();

g.setColor(0x000000);

g.setFont(UIManager.my_smallFont);

String httpConMode="";

String promptStr1 ="";

String promptStr2 ="";

if(BookingMidlet.useProxy){

promptStr1 ="友情提示：請選用移動夢網";

promptStr2 ="連接方式。";

httpConMode="移動夢網";

}else{

promptStr1 ="友情提示：請選用CMNET";

promptStr2 ="或WLAN連接方式。";

httpConMode="CMNET或WLAN";

}

if(connectAgain){

promptStr1="友情提示：請重新登錄";

if(!connectPrompt){

promptStr2="并同意使用網絡";

}else{

promptStr2="選用"+httpConMode;

if(phoneNoMoney)

promptStr2="確認網絡信號或手機話費";

}

int promptStr_X= (EWLScreen.SCREEN_WIDTH-getStringWidth(g.getFont(),promptStr1))/2;

int promptStr_Y= EWLScreen.SCREEN_HEIGHT*3/5;

g.drawString(promptStr1, promptStr_X, promptStr_Y, 0);

g.drawString(promptStr2, promptStr_X, promptStr_Y+g.getFont().getHeight(), 0);

g.setColor(nowColor);

g.setFont(nowFont);

}

/**

* 繪制左右軟鍵

* @param lSoftKeyName 左軟鍵名稱如果null則不繪制

* @param rSoftKeyName 右軟鍵名稱如果null則不繪制

* @param color 繪制軟鍵的顏色

private void drawSoftKeys(Graphics g, String lSoftKeyName,

String rSoftKeyName, int color)

{

if (lSoftKeyName != null)

{// 左軟鍵

int x = FirstPage.LRSoft_LeftAndTopPosition[0][0]+ FirstPage.LRSoft_length_high[0]/2;

int y = FirstPage.LRSoft_LeftAndTopPosition[0][1]+ FirstPage.LRSoft_length_high[1]/2;

// g.setClip(x, y, getStringWidth(g.getFont(), lSoftKeyName), g.getFont().getHeight());

g.drawString( lSoftKeyName, x, y, Graphics.HCENTER|Graphics.BASELINE);

}

if (rSoftKeyName != null)

{// 右軟鍵

int x = FirstPage.LRSoft_LeftAndTopPosition[1][0]+ FirstPage.LRSoft_length_high[0]/2;

int y = FirstPage.LRSoft_LeftAndTopPosition[1][1]+ FirstPage.LRSoft_length_high[1]/2;

// g.setClip(x, y, getStringWidth(g.getFont(), rSoftKeyName), g.getFont().getHeight());

g.drawString(rSoftKeyName, x, y, Graphics.HCENTER|Graphics.BASELINE);

}

/**

* 初始化提示界面時的交互處理

* @param keyCode

private void stateLoginKeyPressed(int keyCode){

int gameCode = 0;

try{

gameCode = this.getGameAction(keyCode);

}catch(Exception e){

System.out.println("get gameaction key error:"+keyCode);

}

if(gameCode==Canvas.UP || gameCode==Canvas.LEFT

|| gameCode==Canvas.RIGHT || gameCode==Canvas.DOWN

|| gameCode==Canvas.FIRE)

{

;

}

else if (keyCode == EWLScreen.KEY_CODE_LEFT_SOFT_KEY

|| keyCode == EWLScreen.KEY_CODE_RIGHT_SOFT_KEY) {

gameCode = keyCode;

}

else if(keyCode==21||keyCode==-21)

gameCode = EWLScreen.KEY_CODE_LEFT_SOFT_KEY;

else if(keyCode==22||keyCode==-22)

gameCode = EWLScreen.KEY_CODE_RIGHT_SOFT_KEY;

else

return;

switch (gameCode) {

case Canvas.FIRE:

case EWLScreen.KEY_CODE_LEFT_SOFT_KEY:// 左軟鍵

//向服務器驗證身份，打開首頁面

UIManager.state=UIManager.STATE_LOGIN_httpConnecting;

BizWindow bw = new BizWindow();

bw.commitUserAuth();

//在用戶向服務器發起請求返回成功后再顯示首頁面。

break;

case EWLScreen.KEY_CODE_RIGHT_SOFT_KEY:// 右軟鍵

//退出。

UIManager.state=UIManager.STATE_DEFAULE;

UIManager._flag = 0;

UIManager._instance.doLoop();

break;

}

protected void keyPressed(int keyCode) {

//處理初始化時的提示界面

if(UIManager.state == UIManager.STATE_LOGIN){

if(!connectAgain){

stateLoginKeyPressed(keyCode);

}else{

if(keyCode == -7 || keyCode == -22 || keyCode == 22)

UIManager._flag = 0;

UIManager._instance.doLoop();

return;

}

else if(UIManager.state == UIManager.STATE_LOGIN_httpConnecting){

//只對返回鍵做處理

if(keyCode == -7 || keyCode == -22 || keyCode == 22){

connectAgain = true;

connectPrompt = true;

UIManager.state=UIManager.STATE_LOGIN;

hidePopup();

}

}else if(UIManager.state == UIManager.STATE_DEFAULE){

try {

if (popupWindow != null)

popupWindow.keyPressed(keyCode);

else if (activeWindow != null)

activeWindow.keyPressed(keyCode);

} catch (Throwable e) {

e.printStackTrace();

}

protected void keyReleased(int keyCode) {

if(UIManager.state == UIManager.STATE_LOGIN ||

UIManager.state == UIManager.STATE_LOGIN_httpConnecting ){

return;

}

try {

if (popupWindow != null)

popupWindow.keyReleased(keyCode);

else if (activeWindow != null)

activeWindow.keyReleased(keyCode);

} catch (Throwable e) {

e.printStackTrace();

}

protected void keyRepeated(int keyCode) {

if(UIManager.state == UIManager.STATE_LOGIN ||

UIManager.state == UIManager.STATE_LOGIN_httpConnecting ){

return;

}

try {

if (popupWindow != null)

popupWindow.keyRepeated(keyCode);

else if (activeWindow != null)

activeWindow.keyRepeated(keyCode);

} catch (Throwable e) {

e.printStackTrace();

}

/**

* 筆觸點擊

* @param a_x: x 坐標

* @param a_y: y 坐標

protected void pointerPressed(int a_x,int a_y)

{

//對九宮格界面處理

if(UIManager._flag == 20){

boolean clickFocus = getFocusFromPointer( a_x, a_y);

if(clickFocus){

keyReleased(-5);

return;

}else{

repaint();

}

// return;

}

//對左右軟件處理

String clickLRSoft = getFocusFromPointer_LRSoft( a_x, a_y);

if(!clickLRSoft.equals("")){

if(clickLRSoft.equals("LEFTSOFT")){

keyPressed(-6);

keyReleased(-6);

}

else if(clickLRSoft.equals("RIGHTSOFT")){

keyPressed(-7);;

keyReleased(-7);

}

return;

}

//對觸摸屏對象處理

if(UIManager._instance.i_clipArea != null){

boolean browseClicpFocus = browseClip(a_x, a_y);

if(browseClicpFocus){

keyPressed(-5);;

keyReleased(-5);

}else{

repaint();

}

protected void pointerReleased(int x, int y)

{

//在pointerPressed中處理

}

/**

* 筆觸拖拉

* x : x 坐標

* y : y 坐標

protected void pointerDragged(int x,int y)

{

//暫未實現

}

/**

* 列表界面的觸摸屏判斷

* @param a_x

* @param a_y

* @return

protected boolean browseClip(int a_x, int a_y){

boolean clickAreaIsFocus = false;

Vector i_clipArea = UIManager._instance.i_clipArea;

if(i_clipArea==null)

return false;

ClipRegion a_clipRegion = null;

for (int i = 0; i < i_clipArea.size(); i++) {

a_clipRegion = (ClipRegion) i_clipArea.elementAt(i);

boolean findClipArea = a_clipRegion.inClipRegion(a_x, a_y);

if(findClipArea){//點擊區域

clickAreaIsFocus = activeWindow.pointerPressSetFocus(a_x ,i);

break;

}

i_clipArea=null;

return clickAreaIsFocus;

}

/**

* 通過x,y坐標，獲得筆觸的焦點值

* @param a_x:筆觸的x

* @param a_y:筆觸的y

* @param focus_X:筆觸所在九宮格的起始x

* @param focus_Y:筆觸所在九宮格的起始y

* @return

protected boolean getFocusFromPointer(int a_x, int a_y){

int focus_X = 0;

int focus_Y = 0;

boolean clickAreaIsFocus = false;

for(int i=0; i<9; i++)

{

focus_X = FirstPage.itemsPosition[i][0];

focus_Y = FirstPage.itemsPosition[i][1];

if(focus_X <= a_x &&

focus_Y <= a_y &&

focus_X + FirstPage.VSize >= a_x &&

focus_Y + FirstPage.HSize >= a_y)

{//筆觸所在的九宮格

if(i==FirstPage.currentItem)

clickAreaIsFocus = true;

FirstPage.currentItem = i;

break;

}

return clickAreaIsFocus;

}

/**

* 通過x,y坐標，獲得筆觸的焦點值

* @param a_x:筆觸的x

* @param a_y:筆觸的y

* @param focus_X:左、右軟件的起始x

* @param focus_Y:左、右軟件的起始y

* @return

protected String getFocusFromPointer_LRSoft(int a_x, int a_y){

int focus_X = 0;

int focus_Y = 0;

String pointSoftKey="";

for(int i=0; i<2; i++)

{

focus_X = FirstPage.LRSoft_LeftAndTopPosition[i][0];

focus_Y = FirstPage.LRSoft_LeftAndTopPosition[i][1];

if(focus_X <= a_x &&

focus_Y <= a_y &&

focus_X + FirstPage.LRSoft_length_high[0] >= a_x &&

focus_Y + FirstPage.LRSoft_length_high[1] >= a_y)

{//筆觸所在的九宮格

if(i==0)

pointSoftKey="LEFTSOFT";

else

pointSoftKey="RIGHTSOFT";

break;

}

return pointSoftKey;

}

public void commandAction(Command c, Displayable d) {

try {

if (d == this)

if (instance.popupWindow != null)

instance.popupWindow.onCommand(c);

else if (instance.activeWindow != null)

instance.activeWindow.onCommand(c);

} catch (Throwable e) {

e.printStackTrace();

}

public static EWLWindow getTopWindow() {

if (instance.popupWindow != null)

return instance.popupWindow;

else

return instance.activeWindow;

}

public static EWLWindow getCurrent() {

return instance.activeWindow;

}

public static void setCurrent(EWLWindow window) {

instance.activeWindow = window;

instance.repaint();

}

public static EWLWindow getPopup() {

return instance.popupWindow;

}

public static void popup(EWLWindow window) {

instance.popupWindow = window;

instance.repaint();

}

public static void hidePopup() {

if (instance.popupWindow instanceof BusinessWindow)

IOManager._interrupt = true;

instance.popupWindow = null;

instance.repaint();

}

public void clearScreen() {

repaint();

serviceRepaints();

}

/***************************************************************************

* 獲取String屏幕寬度操作開始 ***********************************************

**************************************************************************/

private static byte[] i_smallWidth = null;

private static byte[] i_mediumWidth = null;

private static byte[] i_largeWidth = null;

public static byte getCharWidth(Font a_font, char a_c)

{

initFontWidth();

int type = a_font.getSize();

byte[] widthType;

if(type == Font.SIZE_SMALL)

widthType = i_smallWidth;

else if(type == Font.SIZE_MEDIUM)

widthType = i_mediumWidth;

else if(type == Font.SIZE_LARGE)

widthType = i_largeWidth;

else

widthType = i_smallWidth;

if(a_c<0 || a_c>=128)

return widthType[128];

else

{

return widthType[a_c];

}

/**

* 獲取字符的寬度

* @param a_font

* @param a_str

* @return

public static int getStringWidth(Font a_font, String a_str)

{

if(a_str ==null)

return 0;

int width = 0;

char currChar;

for(int i=0;i<a_str.length();i++)

{

currChar = a_str.charAt(i);

width += getCharWidth(a_font, currChar);

}

return width;

}

private static void initFontWidth()

{

if(i_smallWidth!=null)

return;

i_smallWidth = new byte[129];

i_mediumWidth = new byte[129];

i_largeWidth = new byte[129];

Font i_fontSmall = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_SMALL);

Font i_fontMedium = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_MEDIUM);

Font i_fontLarge = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_LARGE);

for(int i=0;i<128;i++)

{

i_smallWidth[i] = (byte)i_fontSmall.charWidth( ((char)i) );

i_mediumWidth[i] = (byte)i_fontMedium.charWidth( ((char)i) );

i_largeWidth[i] = (byte)i_fontLarge.charWidth( ((char)i) );

}

i_smallWidth[128] = (byte)i_fontSmall.charWidth( '小' );

i_mediumWidth[128] = (byte)i_fontMedium.charWidth( '中' );

i_largeWidth[128] = (byte)i_fontLarge.charWidth( '大' );

}

/***************************************************************************

* 獲取String屏幕寬度操作結束************************************************

**************************************************************************/

}

posted on 2010-02-25 15:23 騎豬闖天下閱讀(808) 評論(0) 編輯收藏

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[J2ME]觸摸屏功能實現代碼一