从assets中读取xml文件再动态的创建界面

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我刚到公司的时候看程序代码,怎么都找不到对应的布局文件,后来才发现他们是从assets中读取一篇xml文件动态的创建界面,可能我是个初学者的原因还什么都没怎么见过,对此感到特别的好奇所以研究了一下。
1首先准备了一篇xml文件放到了assets目录下,

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <root>
  3. <assess_item title="评分项目" hide="true">
  4. <spinner title="姓名:" >[],张三,李四</spinner>
  5. <spinner >[],吃,喝,玩,乐</spinner>
  6. <input title="犯罪前科:" ></input>
  7. <input title="既往史:" ></input>
  8. <input title="身高:" >未测,卧床</input>
  9. <input title="体重:" >未测,卧床</input>
  10. <spinner title="文化程度:" >小学,初中,高中,大专,本科以上</spinner>
  11. <input title="饮酒:" />
  12. <input title="脉搏:" />
  13. <input title="呼吸:" />
  14. <input title="收缩压:"/>
  15. <input title="舒张压:" />
  16. <spinner title="意识:" >清楚,模糊,谵妄,嗜睡,昏迷</spinner>
  17. <spinner title="表情:" >正常,急性病容,慢性病容</spinner>
  18. <spinner title="言语:" >正常,含糊不清,失语</spinner>
  19. <input title="皮肤破损:" />
  20. <spinner title="营养状况:" >好,中,差</spinner>
  21. <spinner title="四肢:" >活动自如,功能障碍</spinner>
  22. <input title="四肢异常:" />
  23. <spinner title="感官功能:" >正常,异常</spinner>
  24. <input title="感官异常:" />
  25. <input title="排便异常:" />
  26. <spinner title="静脉输液:" >无,有,表浅静脉,套管针,PICC管,大静脉置管</spinner>
  27. <input title="输液部位:" />
  28. <input title="其他"/>
  29. </assess_item>
  30. <!-- <no_danger/> -->
  31. <!-- <export/> -->
  32. </root>


最后加载完成的界面的效果

添加布局文件主要的布局文件 activity_main.xml

  1. <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" >
  2.  
  3.  
  4.  
  5. <LinearLayout android:id="@+id/ll_2" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" >
  6. </LinearLayout>
  7.  
  8.  
  9. </ScrollView>

上述代码就比较简单就是一个scrollView里边嵌套一个线性布局。
以下两个item,item.xml和item2.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="40dp" android:orientation="horizontal" >
  3.  
  4. <TextView android:id="@+id/tv_item_1" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="2" android:gravity="center" android:text="身高:" />
  5.  
  6. <Spinner android:id="@+id/sp_item_1" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="5" />
  7.  
  8. </LinearLayout>
  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" >
  3.  
  4. <TextView android:id="@+id/tv_item2_1" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="2" android:gravity="center" android:text="TextView:" />
  5.  
  6. <EditText android:id="@+id/et_item2_1" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="5" android:ems="10" >
  7.  
  8. <requestFocus />
  9. </EditText>
  10.  
  11. </LinearLayout>

2 获取这篇xml文件的输入流;

  1. AssetManager assetManager = this.getAssets();
  2.  
  3. parser = Xml.newPullParser();
  4.  
  5.  
  6. InputStream is = assetManager.open("NurseAssess_InHospital.xml",AssetManager.ACCESS_STREAMING);//按顺序读取

这里用到了一个assetManger用这个类的open方法得到这篇xml文件的输入流。
给解析器设置输入流:

  1. parser.setInput(is,"utf-8");
  2. int type;
  3. while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) {
  4. if (type == XmlPullParser.START_TAG) {
  5. }
  6. }

开始读取,

以下代码写在上边代码的if语句里边。

  1. if (name.equals("spinner")) {
  2. String tag = parser.getAttributeValue(null,"title");
  3.  
  4. Log.i("TAG","tag=" + tag);
  5.  
  6. inflater = getLayoutInflater();
  7. view = inflater.inflate(R.layout.item,null);
  8. textView = (TextView) view.findViewById(R.id.tv_item_1);
  9. textView.setText(tag);
  10.  
  11. spinner = (Spinner) view.findViewById(R.id.sp_item_1);
  12. String string = parser.nextText();
  13. String[] strings = string.split(",");
  14. // Log.i("TAG","string="+string);
  15. list = new ArrayList<String>();
  16. for (String string2 : strings) {
  17. Log.i("TAG","string2" + string2);
  18. list.add(string2);
  19. }
  20. Log.i("TAG","strings=" + strings);
  21.  
  22. adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item,list);
  23. adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
  24. spinner.setAdapter(adapter);
  25.  
  26. ll_2.addView(view);
  27.  
  28. if (name.equals("input")) {
  29. inflater = getLayoutInflater();
  30. String string = parser.getAttributeValue(null,"title");
  31. Log.i("TAG","string=" + string);
  32.  
  33. View view = inflater.inflate(R.layout.item2,null);
  34. et = (EditText) view.findViewById(R.id.et_item2_1);
  35. textView2 = (TextView) view
  36. .findViewById(R.id.tv_item2_1);
  37.  
  38. textView2.setText(string);
  39.  
  40. ll_2.clearFocus();
  41. ll_2.setFocusable(true);
  42. ll_2.setFocusableInTouchMode(true);
  43. ll_2.addView(view);
  44.  
  45. }

以下是完整的MianActivity的代码

  1. package com.example.day1403;
  2.  
  3. import java.io.FileNotFoundException;
  4. import java.io.IOException;
  5. import java.io.InputStream;
  6. import java.util.ArrayList;
  7. import java.util.List;
  8.  
  9. import org.xmlpull.v1.XmlPullParser;
  10. import org.xmlpull.v1.XmlPullParserException;
  11.  
  12. import android.app.Activity;
  13. import android.content.res.AssetManager;
  14. import android.os.Bundle;
  15. import android.util.Log;
  16. import android.util.Xml;
  17. import android.view.LayoutInflater;
  18. import android.view.View;
  19. import android.widget.ArrayAdapter;
  20. import android.widget.EditText;
  21. import android.widget.LinearLayout;
  22. import android.widget.Spinner;
  23. import android.widget.TextView;
  24.  
  25. public class MainActivity extends Activity {
  26. private Spinner spinner;
  27. private XmlPullParser parser;
  28. private LayoutInflater inflater;
  29. private ArrayAdapter<String> adapter;
  30. private List<String> list;
  31. private EditText et;
  32. private LinearLayout ll_2;
  33. private TextView textView;
  34. private TextView textView2;
  35.  
  36. private View view;
  37.  
  38. @Override
  39. protected void onCreate(Bundle savedInstanceState) {
  40. super.onCreate(savedInstanceState);
  41. setContentView(R.layout.activity_main);
  42. ll_2 = (LinearLayout) findViewById(R.id.ll_2);
  43. getView();
  44. }
  45.  
  46. private void getView() {
  47. try {
  48.  
  49. AssetManager assetManager = this.getAssets();
  50.  
  51. parser = Xml.newPullParser();
  52. Log.i("TAG","执行了");
  53.  
  54. InputStream is = assetManager.open("NurseAssess_InHospital.xml",AssetManager.ACCESS_STREAMING);
  55.  
  56. parser.setInput(is,"utf-8");
  57. int type;
  58. while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) {
  59. String name = parser.getName();
  60. Log.i("TAG","name=" + name);
  61. if (type == XmlPullParser.START_TAG) {
  62.  
  63. if (name.equals("spinner")) {
  64. String tag = parser.getAttributeValue(null,list);
  65. adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
  66. spinner.setAdapter(adapter);
  67.  
  68. ll_2.addView(view);
  69. }
  70. if (name.equals("input")) {
  71. inflater = getLayoutInflater();
  72. String string = parser.getAttributeValue(null,null);
  73. et = (EditText) view.findViewById(R.id.et_item2_1);
  74. textView2 = (TextView) view
  75. .findViewById(R.id.tv_item2_1);
  76.  
  77. textView2.setText(string);
  78.  
  79. ll_2.clearFocus();
  80. ll_2.setFocusable(true);
  81. ll_2.setFocusableInTouchMode(true);
  82. ll_2.addView(view);
  83.  
  84. }
  85. }
  86. }
  87. is.close;
  88. } catch (FileNotFoundException e) {
  89. Log.i("TAG","文件没找到");
  90. e.printStackTrace();
  91. } catch (XmlPullParserException e) {
  92. e.printStackTrace();
  93. } catch (IOException e) {
  94. e.printStackTrace();
  95. }
  96. }
  97.  
  98. }

因为我是新手难免有错误,希望有错误的地方大家积极指出谢谢

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