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"};
	@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);
	}
}

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

时间： 2024-10-06 00:29:27

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