android 自定义dialog listview自适应屏幕显示

【实例截图】

【核心代码】

package com.dialogtest;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.graphics.Rect;
import android.os.Bundle;
import android.view.Display;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.google.gson.Gson;

public class DialogTestScreen extends Activity implements OnClickListener {
	private TextView select;
	private String build = "", unit = "", room = "";
	private ListView bListView;
	private CustomDialog treeDialog;
	private int Tag = -1;
	private TextView title;
	private SearchBuildingAdapter buildAdapter;
	private SearchRoomAdapter roomAdapter;
	private SearchUnitAdapter unitAdapter;
	private ListtreeData = new ArrayList();
	private ListunitData = new ArrayList();
	private ListroomData = new ArrayList();
	public static int screenWidth = 0;
	private int screenHeight = 0;
	private View dialogView, search_btitle;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		Display display = getWindowManager().getDefaultDisplay();
		screenWidth = display.getWidth();
		screenHeight = display.getHeight();
		setContentView(R.layout.activity_main);
		select = (TextView) findViewById(R.id.select);
		select.setOnClickListener(this);
		readLocalFile();
	}

	// 读取本地文件
	private void readLocalFile() {
		InputStreamReader inputReader = null;
		try {
			inputReader = new InputStreamReader(getAssets().open(
					"data.json"));
		} catch (IOException e2) {
			e2.printStackTrace();
		}
		BufferedReader bufReader = new BufferedReader(inputReader);
		String line = "";
		StringBuilder buffer = new StringBuilder();
		try {
			while ((line = bufReader.readLine()) != null) {
				buffer.append(line);
			}
		} catch (IOException e1) { // TODO Auto-generated catch block
			e1.printStackTrace();
		}
		Gson gson = new MGsonBuilder().createGson();
		SearchTreeResponse data = gson.fromJson(buffer.toString(),
				SearchTreeResponse.class);
		treeData = data.getBuilding_list();
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.select:
			CustomDialog.Builder builder = new CustomDialog.Builder(this);
			dialogView = getLayoutInflater().inflate(R.layout.listview_dialog,
					null);
			title = (TextView) dialogView.findViewById(R.id.custom_title);
			search_btitle = dialogView.findViewById(R.id.search_btitle);
			TextView back = (TextView) dialogView
					.findViewById(R.id.custom_back);
			bListView = (ListView) dialogView
					.findViewById(R.id.buildings_listview);
			back.setOnClickListener(this);
			treeDialog = builder.listDialog(dialogView);
			treeDialog.show();
			initBuilds();
			Tag = -1;

			bListView.setOnItemClickListener(new OnItemClickListener() {
				@Override
				public void onItemClick(AdapterView parent, View view,
						int position, long id) {
					// TODO Auto-generated method stub
					switch (Tag) {
					case -1:
						Tag = 0;
						SearchTreeChild vo1 = buildAdapter.getItem(position);
						build = vo1.getBuilding_name();
						title.setText(build);
						unitData = vo1.getUnit_list();
						initUnits();
						break;

					case 0:
						Tag = 1;
						SearchTreeVo vo2 = unitAdapter.getItem(position);
						unit = vo2.getUnit_name();
						title.setText(unit   "单元");
						roomData = vo2.getRoom_nmber_list();
						initRooms();
						break;

					case 1:
						TreeVo vo3 = roomAdapter.getItem(position);
						room = vo3.getRoom_nmber();
						id = vo3.getHouse_id();
						select.setText(build   "、"   unit   "、"   room);
						treeDialog.dismiss();
						Tag = -1;
						break;
					default:
						break;
					}

				}
			});

			break;

		case R.id.custom_back:
			switch (Tag) {
			case -1:
				if (treeDialog != null && treeDialog.isShowing()) {
					build = "";
					unit = "";
					room = "";
					treeDialog.dismiss();
				}
				break;

			case 0:
				Tag = -1;
				initBuilds();
				break;

			case 1:
				Tag = 0;
				title.setText(build);
				initUnits();
				break;

			default:
				break;
			}

			break;
		default:
			break;
		}
	}

	private void initBuilds() {
		if (buildAdapter == null) {
			buildAdapter = new SearchBuildingAdapter(this);
		}
		bListView.setAdapter(buildAdapter);
		buildAdapter.setData(treeData);
		title.setText("选择楼栋");
		refreshHeight();
	}

	private void initUnits() {
		if (unitAdapter == null) {
			unitAdapter = new SearchUnitAdapter(this);
		}
		bListView.setAdapter(unitAdapter);
		unitAdapter.setData(unitData);
		refreshHeight();
	}

	private void initRooms() {
		if (roomAdapter == null) {
			roomAdapter = new SearchRoomAdapter(this);
		}
		bListView.setAdapter(roomAdapter);
		roomAdapter.setData(roomData);
		refreshHeight();
	}

	public void refreshHeight() {
		int totalHeight = 0;
		ListAdapter listAdapter = bListView.getAdapter();
		for (int i = 0; i < listAdapter.getCount(); i  ) { // listAdapter.getCount()返回数据项的数目
			View listItem = listAdapter.getView(i, null, bListView);
			listItem.measure(0, 0); // 计算子项View 的宽�?
			totalHeight  = listItem.getMeasuredHeight(); // 统计�?��子项的�?高度
		}
		Rect rectangle = new Rect();
		Window window = getWindow();
		window.getDecorView().getWindowVisibleDisplayFrame(rectangle);
		int th = search_btitle.getMeasuredHeight();

		int height = totalHeight   th   rectangle.top;

		WindowManager.LayoutParams p = treeDialog.getWindow().getAttributes();
		if (height > screenHeight || height == screenHeight) {
			p.height = screenHeight - th * 2;
		} else {
			p.height = p.WRAP_CONTENT;
		}
		treeDialog.getWindow().setAttributes(p);
	}

}