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   源码介绍

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package com.example.meituandemo;

import java.util.ArrayList;

import com.example.meituan.view.ExpandTabView;
import com.example.meituan.view.ViewLeft;
import com.example.meituan.view.ViewMiddle;
import com.example.meituan.view.ViewRight;
import com.example.meituandemo2.R;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;

/**
 * 主活动页面。
 * 
 * @author Administrator
 * 
 */
public class MainActivity extends Activity {

	private ExpandTabView expandTabView;
	private ViewLeft viewLeft;
	private ViewMiddle viewMiddle;
	private ViewRight viewRight;
	private ArrayList<View> mViewArray = new ArrayList<View>();
	private static final String TAG = "MainActivity";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initView();
		initVaule();
		initListener();
	}

	private void initListener() {

		viewLeft.setOnSelectListener(new ViewLeft.OnSelectListener() {

			@Override
			public void getValue(String distance, String showText) {
				onRefresh(viewLeft, showText);
			}
		});
		

		viewMiddle.setOnSelectListener(new ViewMiddle.OnSelectListener() {

			@Override
			public void getValue(String showText) {

				onRefresh(viewMiddle, showText);

			}
		});

		viewRight.setOnSelectListener(new ViewRight.OnSelectListener() {

			@Override
			public void getValue(String distance, String showText) {
				onRefresh(viewRight, showText);
			}
		});

	}

	private void onRefresh(View view, String showText) {

		expandTabView.onPressBack();
		int position = getPositon(view);
		if (position >= 0 && !expandTabView.getTitle(position).equals(showText)) {
			expandTabView.setTitle(showText, position);
		}
		Toast.makeText(MainActivity.this, showText, Toast.LENGTH_SHORT).show();

	}

	private int getPositon(View tView) {
		for (int i = 0; i < mViewArray.size(); i  ) {
			if (mViewArray.get(i) == tView) {
				return i;
			}
		}
		return -1;
	}

	@Override
	public void onBackPressed() {

		if (!expandTabView.onPressBack()) {
			finish();
		}

	}

	private void initVaule() {
		Log.d(TAG, "initValue");
		mViewArray.add(viewLeft);
		mViewArray.add(viewMiddle);
		mViewArray.add(viewRight);
		ArrayList<String> mTextArray = new ArrayList<String>();
		mTextArray.add("全部分类");
		mTextArray.add("全城");
		mTextArray.add("只能排序");
		expandTabView.setValue(mTextArray, mViewArray);// 将三个下拉列表设置进去
		// expandTabView.setTitle(viewLeft.getShowText(), 0);
		// expandTabView.setTitle(viewMiddle.getShowText(), 1);
		// expandTabView.setTitle(viewRight.getShowText(), 2);

	}

	private void initView() {
		expandTabView = (ExpandTabView) findViewById(R.id.expandtab_view);
		viewLeft = new ViewLeft(this);
		viewMiddle = new ViewMiddle(this);
		viewRight = new ViewRight(this);

	}
}