[android]再也不用一行一行的写findViewById代码了
前因：最近新做项目，由于现有项目中并没有使用注解，结果写findViewById代码写吐了，于是接想了下解决方案，谷歌了下，发现还真有人实现了，但是不能下载了。于是决定自己写一个工具类。
概述：Android项目开发中，尤其在项目开发的初期，我们总是要重复的写大量的TextView testTv= (TextView)findViewById(R.id.testTv);代码语句，耗时耗力，而且还没什么技术含量。
下面这个java类可以帮你彻底的解脱这个烦恼。(当然，早就有大神使用注解来解决这个问题了)。
使用方法： 将 XML_NAME 和 PROJECT_PATH 两个字段替换为你自己的
使用规范:
1:layout 布局xml文件中的id必须是"@+id/..."这种形式，不得是引用id.
2:在生成代码之前，必须 (CTRL+SHIFT+F )格式化布局xml文件，这个很重要，因为这个工具类的原理仅仅是简单的逐行读取数据而已。
3:为避免出错，请不要有注释。
小提示
1:如果不想对某个id生成对应的成员变量，请将这个id命名成以"_fake"为结尾的后缀，（RelativeLayout中有些节点起id名称可能仅仅是作为相对元素定位之用）
package tdc.opt.xml.to.code;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class MakeAndroidXml2Code {
private static final String NULL_STRING_2 = " ";// " "
private static final String NULL_STRING_1 = " ";// " "
private static final String XML_SUFFX = ".xml";
private static final String TEXT_VIEW = "TextView";
private static final String BUTTON = "Button";
private static final String VIEW_HOLDER_CLASS_NAME = "ViewHolder";
private static final String FAKE_TAG = "_fake";
private static final String CONVERT_VIEW = "convertView";
private final String XML_NAME = "shou_ye_ji_fen_item.xml";
private String PROJECT_PATH = "/Users/tangdengcheng/Documents/android_workplace/CaiMiLottery";
private String xmlPath = PROJECT_PATH + "/res/layout/" + XML_NAME;
private boolean isMakeOnClickListener = true;
private boolean isMakeSetText = true;
public static void main(String[] args) {
MakeAndroidXml2Code makeAndroidXml2Code = new MakeAndroidXml2Code();
makeAndroidXml2Code.makeOnCreateCode();
makeAndroidXml2Code.makeGetViewCode();
}
/**
* 根据ID在Activity onCreate 方法中生成findViewById的方法以及对应的成员变量
*/
public void makeOnCreateCode() {
Map<String, String> map = new HashMap<String, String>();
BufferedReader bufferedReader = null;
String lastLine = "";
try {
bufferedReader = new BufferedReader((new FileReader(xmlPath)));
while (bufferedReader.read() != -1) {
final String readLine = bufferedReader.readLine().toString()
.trim();
if (readLine.contains("android:id=\"@+id/")
&& !readLine.contains(FAKE_TAG)) {
String key = readLine.replace("android:id=\"@+id/", "")
.replace("\"", "");
String value = lastLine.replace("<", "");
map.put(key, value);
}
lastLine = readLine;
}
} catch (Exception e) {
e.printStackTrace();
}
for (Iterator<String> iterator = map.keySet().iterator(); iterator
.hasNext();) {
String id = (String) iterator.next();
System.out.println(NULL_STRING_1 + "private " + map.get(id) + " "
+ id + ";");
}
System.out.println();
System.out.println(NULL_STRING_1 + "private void initView(){");
System.out.println();
for (Iterator<String> iterator = map.keySet().iterator(); iterator
.hasNext();) {
String id = iterator.next();
System.out.println(NULL_STRING_2 + id + " = (" + map.get(id)
+ ")findViewById(R.id." + id + ");");
}
if (isMakeOnClickListener) {
System.out.println();
for (String key : map.keySet()) {
if (BUTTON.equals(map.get(key))) {
System.out.println(NULL_STRING_2 + key
+ ".setOnClickListener(this);");
}
}
}
if (isMakeSetText) {
System.out.println();
for (String key : map.keySet()) {
if (TEXT_VIEW.equals(map.get(key))) {
System.out
.println(NULL_STRING_2 + key + ".setText(" + ");");
}
}
}
System.out.println(NULL_STRING_1 + "}");
}
/**
* 在BaseAdapter类中，根据指定的xml布局文件生成对应的findViewById方法以及对应的ViewHolder
*/
public void makeGetViewCode() {
Map<String, String> map = new HashMap<String, String>();
BufferedReader bufferedReader = null;
String lastLine = "";
try {
bufferedReader = new BufferedReader((new FileReader(xmlPath)));
while (bufferedReader.read() != -1) {
final String readLine = bufferedReader.readLine().toString()
.trim();
if (readLine.contains("android:id=\"@+id/")
&& !readLine.contains(FAKE_TAG)) {
String key = readLine.replace("android:id=\"@+id/", "")
.replace("\"", "");
String value = lastLine.replace("<", "");
map.put(key, value);
}
lastLine = readLine;
}
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(" " + "private final class "
+ VIEW_HOLDER_CLASS_NAME + " { ");
for (Iterator<String> iterator = map.keySet().iterator(); iterator
.hasNext();) {
String id = (String) iterator.next();
System.out.println(NULL_STRING_2 + "private " + map.get(id) + " "
+ id + ";");
}
System.out.println(NULL_STRING_1 + "}");
System.out.println();
System.out.println();
System.out.println(NULL_STRING_1 + "@Override");
System.out.println(NULL_STRING_1
+ "public View getView(int position, View " + CONVERT_VIEW
+ ", ViewGroup parentViewGroup) {");
String xmlString = XML_NAME.contains(XML_SUFFX) ? XML_NAME.replace(
XML_SUFFX, "") : XML_NAME;
final String firstString = new String(
new char[] { VIEW_HOLDER_CLASS_NAME.charAt(0) });
final String classObject = firstString.toLowerCase()
+ VIEW_HOLDER_CLASS_NAME.substring(1,
VIEW_HOLDER_CLASS_NAME.length());
System.out.println(NULL_STRING_2 + VIEW_HOLDER_CLASS_NAME + " "
+ classObject + " = null ;");
System.out.println(NULL_STRING_2 + "if (" + CONVERT_VIEW
+ " == null) { ");
System.out.println(NULL_STRING_2 + CONVERT_VIEW
+ " = LayoutInflater.from(context) .inflate(R.layout."
+ xmlString + ", parentViewGroup,false);");
System.out.println(NULL_STRING_2 + classObject + " = new "
+ VIEW_HOLDER_CLASS_NAME + " ();");
for (Iterator<String> iterator = map.keySet().iterator(); iterator
.hasNext();) {
String id = (String) iterator.next();
System.out.println(NULL_STRING_2 + classObject + "." + id + " = ("
+ map.get(id) + ")" + CONVERT_VIEW + "."
+ "findViewById(R.id." + id + ");");
}
if (isMakeOnClickListener) {
System.out.println();
for (String key : map.keySet()) {
if (BUTTON.equals(map.get(key))) {
System.out.println(NULL_STRING_2 + classObject + "."+key
+ ".setOnClickListener(this);");
}
}
System.out.println();
}
System.out.println(NULL_STRING_2 + CONVERT_VIEW + ".setTag("
+ classObject + ");");
System.out.println(NULL_STRING_2 + "} " + "else { ");
System.out.println(" " + classObject + " = ("
+ VIEW_HOLDER_CLASS_NAME + ")" + CONVERT_VIEW + ".getTag(); ");
System.out.println(NULL_STRING_2 + "}");
if (isMakeSetText) {
System.out.println();
for (String key : map.keySet()) {
if (TEXT_VIEW.equals(map.get(key))) {
System.out.println(NULL_STRING_2 + classObject + "."+key
+ ".setText();");
}
}
System.out.println();
}
System.out.println(NULL_STRING_2 + "return convertView;");
System.out.println(NULL_STRING_1 + "}");
}
}
XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="90dp"
android:background="@drawable/icaimi_gc_item_bg_selector_ming" >
<TextView
android:id="@+id/gridItemTitleTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:text="竞彩足球"
android:textColor="#666666"
android:textSize="15sp" />
<TextView
android:id="@+id/gridItemTitleDescTv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/gridItemTitleTv"
android:layout_centerHorizontal="true"
android:layout_marginBottom="3dp"
android:layout_marginTop="2.5dp"
android:ellipsize="end"
android:singleLine="true"
android:text="2快中100元"
android:textColor="#b0b0b0"
android:textSize="@dimen/text_size_ten" />
<ImageView
android:id="@+id/gridItemIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/gridItemTitleDescTv"
android:layout_centerHorizontal="true"
android:src="@drawable/shouye_pig" />
<View
android:layout_width="@dimen/divider_height"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:background="@color/fa_xian_divider" />
</RelativeLayout>
生成的代码有
private TextView gridItemTitleTv;
private ImageView gridItemIcon;
private TextView gridItemTitleDescTv;
private void initView(){
gridItemTitleTv = (TextView)findViewById(R.id.gridItemTitleTv);
gridItemIcon = (ImageView)findViewById(R.id.gridItemIcon);
gridItemTitleDescTv = (TextView)findViewById(R.id.gridItemTitleDescTv);
gridItemTitleTv.setText();
gridItemTitleDescTv.setText();
}
如果是ListView的item则会是：
private final class ViewHolder {
private TextView gridItemTitleTv;
private ImageView gridItemIcon;
private TextView gridItemTitleDescTv;
}
@Override
public View getView(int position, View convertView, ViewGroup parentViewGroup) {
ViewHolder viewHolder = null ;
if (convertView == null) {
convertView = LayoutInflater.from(context) .inflate(R.layout.shou_ye_ji_fen_item, parentViewGroup,false);
viewHolder = new ViewHolder ();
viewHolder.gridItemTitleTv = (TextView)convertView.findViewById(R.id.gridItemTitleTv);
viewHolder.gridItemIcon = (ImageView)convertView.findViewById(R.id.gridItemIcon);
viewHolder.gridItemTitleDescTv = (TextView)convertView.findViewById(R.id.gridItemTitleDescTv);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder)convertView.getTag();
}
viewHolder.gridItemTitleTv.setText();
viewHolder.gridItemTitleDescTv.setText();
return convertView;
}
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