复杂的代码布局

今天研究了一下全代码布局，使用了TextView、EditText、ScrollView、Spinner、ArrayAdapter、LinearLayout、RelativeLayout、ExpandableListView、BaseExpandableListAdapter等控件，其中ExpandableListView是属于复杂的控件。

效果图如下：

关键代码如下：

package com.example.mytest;import java.util.ArrayList;import java.util.List;import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.graphics.Color;import android.text.InputFilter;import android.view.Gravity;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.view.ViewGroup.LayoutParams;import android.widget.AbsListView;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.BaseExpandableListAdapter;import android.widget.Button;import android.widget.EditText;import android.widget.ExpandableListView;import android.widget.ExpandableListView.OnChildClickListener;import android.widget.ExpandableListView.OnGroupClickListener;import android.widget.ImageView;import android.widget.ImageView.ScaleType;import android.widget.LinearLayout;import android.widget.RelativeLayout;import android.widget.ScrollView;import android.widget.Spinner;import android.widget.TextView;import android.widget.Toast;public class TestExpandableListViewActivity extends Activity {private ExpandableListView exListView;private List<String> groupArray = new ArrayList<String>();private List<ArrayList<String>> childArray = new ArrayList<ArrayList<String>>();private MyAdapter myAdapter;String[] spinnerDatas = new String[]{"第一个选项","第二个选项","第三个选项"};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);initView();initData();}private void initData() {groupArray.add("好友");groupArray.add("同学");ArrayList<String> ay1 = new ArrayList<String>();ay1.add("张三");childArray.add(ay1);ArrayList<String> ay2 = new ArrayList<String>();ay2.add("万物2");childArray.add(ay2);myAdapter = new MyAdapter();exListView.setAdapter(myAdapter);exListView.setGroupIndicator(null);//去掉箭头//展开for(int i = 0; i < myAdapter.getGroupCount(); i++){  exListView.expandGroup(i);  } }/** * 初始化界面 */private void initView() {ScrollView main = new ScrollView(this);   main.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));   main.setBackgroundColor(Color.WHITE);          //根布局参数    LinearLayout.LayoutParams layoutParamsRoot = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT);   layoutParamsRoot.gravity = Gravity.CENTER;   //根布局    LinearLayout layoutRoot = new LinearLayout(this);   layoutRoot.setLayoutParams(layoutParamsRoot);   layoutRoot.setOrientation(LinearLayout.VERTICAL);   //上边距（dp值）    int margin = dip2px(this, 5);   //添加一个textview LinearLayout.LayoutParams layoutParamsTextInfo = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,dip2px(this, 50));   TextView textInfo = new TextView(TestExpandableListViewActivity.this);   textInfo.setGravity(Gravity.CENTER_VERTICAL);   textInfo.setTextSize(18);   textInfo.setBackgroundColor(Color.CYAN); textInfo.setPadding(margin, 0, 0, 0); textInfo.setText("什么配电系统参数"); layoutRoot.addView(textInfo,layoutParamsTextInfo); //添加输入项 LinearLayout.LayoutParams layoutParamsEdittext = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,dip2px(this, 50));   EditText editInfo = new EditText(TestExpandableListViewActivity.this);   editInfo.setHint("请输入文字内容");   //设置可输入的最大长度    InputFilter[] filters = {new InputFilter.LengthFilter(5)};     editInfo.setFilters(filters);   editInfo.setTextSize(18);   editInfo.setPadding(dip2px(this, 8), 0, 0, 0); layoutRoot.addView(editInfo,layoutParamsEdittext);  LinearLayout.LayoutParams layoutParamsTextInfo2 = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,dip2px(this, 50));   TextView textInfo2 = new TextView(TestExpandableListViewActivity.this);   textInfo2.setGravity(Gravity.CENTER_VERTICAL);   textInfo2.setTextSize(18);   textInfo2.setBackgroundColor(Color.CYAN); textInfo.setPadding(margin, 0, 0, 0); textInfo2.setText("选择配电系统参数"); layoutRoot.addView(textInfo2,layoutParamsTextInfo2); //添加下来选择框 Spinner sp = new Spinner(this); LinearLayout.LayoutParams layoutParamsSp = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT,dip2px(this, 50));   ArrayAdapter<String> myadapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,spinnerDatas ); myadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); sp.setAdapter(myadapter); sp.setOnItemSelectedListener(new OnItemSelectedListener() {@Overridepublic void onItemSelected(AdapterView<?> arg0, View arg1,int position, long arg3) {Toast.makeText(TestExpandableListViewActivity.this, spinnerDatas[position], 1).show();}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {}}); layoutRoot.addView(sp,layoutParamsSp); //添加expandablelistview LinearLayout.LayoutParams layoutParamsExpand = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);   exListView = new MyExpandableListView(this); layoutRoot.addView(exListView, layoutParamsExpand); //添加点击上一页下一页按钮 LinearLayout.LayoutParams layoutParamsBottom = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,dip2px(this, 70));   LinearLayout layoutBottom = new LinearLayout(this);   layoutBottom.setLayoutParams(layoutParamsBottom);   layoutBottom.setOrientation(LinearLayout.HORIZONTAL);  layoutBottom.setGravity(Gravity.CENTER); Button leftBtn = new Button(this); leftBtn.setText("上一步");  Button rightBtn = new Button(this); rightBtn.setText("下一步");  layoutBottom.addView(leftBtn); layoutBottom.addView(rightBtn); layoutRoot.addView(layoutBottom,layoutParamsBottom);   //将界面加载进去 main.addView(layoutRoot);   setContentView(main);  exListView.setOnGroupClickListener(new OnGroupClickListener() {@Overridepublic boolean onGroupClick(ExpandableListView arg0, View arg1, int position,long arg3) {//true无法关闭，false可以点击打开关闭return true;}});exListView.setOnChildClickListener(new OnChildClickListener() {@Overridepublic boolean onChildClick(ExpandableListView arg0, View arg1, int groupPosition,int childPosition, long arg4) {return false;}});}class MyAdapter extends BaseExpandableListAdapter {@Overridepublic Object getChild(int groupPosition, int childPosition) {return childArray.get(groupPosition).get(childPosition);}@Overridepublic long getChildId(int groupPosition, int childPosition) {return childPosition;}@Overridepublic View getChildView(int groupPosition, int childPosition,boolean isLastChild, View convertView, ViewGroup parent) {String string = childArray.get(groupPosition).get(childPosition);return getChildView(string,groupPosition,childPosition);}@Overridepublic int getChildrenCount(int groupPosition) {return childArray.get(groupPosition).size();}@Overridepublic Object getGroup(int groupPosition) {return groupArray.get(groupPosition);}@Overridepublic int getGroupCount() {return groupArray.size();}@Overridepublic long getGroupId(int groupPosition) {return groupPosition;}@Overridepublic View getGroupView(int groupPosition, boolean isExpanded,View convertView, ViewGroup parent) {String string = groupArray.get(groupPosition);return getParentView(string,groupPosition);}@Overridepublic boolean hasStableIds() {return false;}@Overridepublic boolean isChildSelectable(int arg0, int arg1) {return true;}public RelativeLayout getParentView(final String string,final int position) {AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, dip2px(TestExpandableListViewActivity.this, 60));RelativeLayout relaLayout = new RelativeLayout(TestExpandableListViewActivity.this);  relaLayout.setLayoutParams(layoutParams);  relaLayout.setBackgroundColor(Color.CYAN);RelativeLayout.LayoutParams paramsImageText = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);  paramsImageText.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);  paramsImageText.setMargins(dip2px(TestExpandableListViewActivity.this, 15), 0, 0, 0);  //初始化textInfo   TextView textInfo = new TextView(TestExpandableListViewActivity.this);  textInfo.setGravity(Gravity.CENTER_HORIZONTAL);  textInfo.setTextSize(18);  textInfo.setText(string);//初始化右边add按钮RelativeLayout.LayoutParams paramsImageAdd = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);  paramsImageAdd.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);  paramsImageAdd.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);  paramsImageAdd.setMargins(0, 0, dip2px(TestExpandableListViewActivity.this, 5), 0);  paramsImageAdd.width = dip2px(TestExpandableListViewActivity.this, 20);paramsImageAdd.height = dip2px(TestExpandableListViewActivity.this, 20);//初始化右边add按钮   ImageView imageAdd = new ImageView(TestExpandableListViewActivity.this);  imageAdd.setScaleType(ScaleType.FIT_XY);  imageAdd.setAdjustViewBounds(true);  imageAdd.setImageResource(R.drawable.add); imageAdd.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {Toast.makeText(TestExpandableListViewActivity.this, "添加", 1).show();childArray.get(position).add("new add");notifyDataSetChanged();}});relaLayout.addView(textInfo, paramsImageText);  relaLayout.addView(imageAdd, paramsImageAdd);  return relaLayout;}public RelativeLayout getChildView(final String string,final int GroupPosition,final int childPosition) {AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, dip2px(TestExpandableListViewActivity.this, 60));RelativeLayout relaLayout = new RelativeLayout(TestExpandableListViewActivity.this);  relaLayout.setLayoutParams(layoutParams);  RelativeLayout.LayoutParams paramsImageText = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);  paramsImageText.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);  paramsImageText.setMargins(dip2px(TestExpandableListViewActivity.this, 25), 0, 0, 0);  //初始化textInfo   TextView textInfo = new TextView(TestExpandableListViewActivity.this);  textInfo.setGravity(Gravity.CENTER_HORIZONTAL);  textInfo.setTextSize(18);  textInfo.setText(string);textInfo.setId(100000001);//初始化右边delete按钮RelativeLayout.LayoutParams paramsImageDel = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);  paramsImageDel.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);  paramsImageDel.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);  paramsImageDel.setMargins(0, 0, dip2px(TestExpandableListViewActivity.this, 5), 0);  paramsImageDel.width = dip2px(TestExpandableListViewActivity.this, 20);paramsImageDel.height = dip2px(TestExpandableListViewActivity.this, 20);//初始化右边删除按钮   ImageView imageAdd = new ImageView(TestExpandableListViewActivity.this);  imageAdd.setScaleType(ScaleType.FIT_XY);  imageAdd.setAdjustViewBounds(true);  imageAdd.setImageResource(R.drawable.delete); imageAdd.setId(100000002);imageAdd.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {Toast.makeText(TestExpandableListViewActivity.this, "删除", 1).show();childArray.get(GroupPosition).remove(childPosition);notifyDataSetChanged();}});//添加edittextRelativeLayout.LayoutParams paramsEdit = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);  paramsEdit.addRule(RelativeLayout.LEFT_OF, 100000002);  paramsEdit.addRule(RelativeLayout.RIGHT_OF, 100000001);  paramsEdit.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);  paramsEdit.setMargins(dip2px(TestExpandableListViewActivity.this, 5), 0, 0, 0);  EditText editInfo = new EditText(TestExpandableListViewActivity.this);   editInfo.setHint("请输入文字内容");   //设置可输入的最大长度    InputFilter[] filters = {new InputFilter.LengthFilter(5)};     editInfo.setFilters(filters);   editInfo.setTextSize(18);   editInfo.setPadding(dip2px(TestExpandableListViewActivity.this, 8), 0, 0, 0);relaLayout.addView(editInfo, paramsEdit);  relaLayout.addView(textInfo, paramsImageText);  relaLayout.addView(imageAdd, paramsImageDel);  return relaLayout;}}/**  * 根据手机的分辨率从 dp 的单位 转成为 px(像素)  */  public static int dip2px(Context context, float dpValue) {  final float scale = context.getResources().getDisplayMetrics().density;  return (int) (dpValue * scale + 0.5f);  }  /**  * 根据手机的分辨率从 px(像素) 的单位 转成为 dp  */  public static int px2dip(Context context, float pxValue) {  final float scale = context.getResources().getDisplayMetrics().density;  return (int) (pxValue / scale + 0.5f);  }  }

源码下载地址：http://download.csdn.net/detail/xiaoyi848699/8602437