标签：复杂的代码布局 代码布局 expandablelistview
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"};
@Override
protected 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() {
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int position, long arg3) {
Toast.makeText(TestExpandableListViewActivity.this, spinnerDatas[position], 1).show();
}
@Override
public 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() {
@Override
public 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() {
@Override
public boolean onChildClick(ExpandableListView arg0, View arg1, int groupPosition,
int childPosition, long arg4) {
return false;
}
});
}
class MyAdapter extends BaseExpandableListAdapter {
@Override
public Object getChild(int groupPosition, int childPosition) {
return childArray.get(groupPosition).get(childPosition);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
String string = childArray.get(groupPosition).get(childPosition);
return getChildView(string,groupPosition,childPosition);
}
@Override
public int getChildrenCount(int groupPosition) {
return childArray.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
return groupArray.get(groupPosition);
}
@Override
public int getGroupCount() {
return groupArray.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String string = groupArray.get(groupPosition);
return getParentView(string,groupPosition);
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public 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() {
@Override
public 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() {
@Override
public void onClick(View arg0) {
Toast.makeText(TestExpandableListViewActivity.this, "删除", 1).show();
childArray.get(GroupPosition).remove(childPosition);
notifyDataSetChanged();
}
});
//添加edittext
RelativeLayout.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);
}
}
标签：复杂的代码布局 代码布局 expandablelistview
原文地址：http://blog.csdn.net/xiaoyi_tdcq/article/details/45082647
