头条新闻（3）

默认选中推荐类型：

需要自定义adapter:

package com.cmge.news;

import java.util.List;
import java.util.Map;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.SimpleAdapter;
import android.widget.TextView;

public class CustomSimplerAdapter extends SimpleAdapter{

	public CustomSimplerAdapter(Context context, List<? extends Map<String, ?>> data, int resource, String[] from, int[] to) {
		super(context, data, resource, from, to);
	}
	
	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		View view = super.getView(position, convertView, parent);
		if(position == 0){
			TextView categoryView = (TextView)view;
			categoryView.setBackgroundColor(categoryView.getResources().getColor(R.color.select_category));
			categoryView.setTextColor(categoryView.getResources().getColor(R.color.white));
		}
		
		return view;
	}
}

 

选中分类修改样式：

package com.cmge.news;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.HorizontalScrollView;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.SimpleAdapter;
import android.widget.TextView;

public class IndexActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.index);
		
		// 获取新闻分类
		String[] categorys = getResources().getStringArray(R.array.categorys);
		
		List<HashMap<String,Object>> list = new ArrayList<HashMap<String,Object>>();
		for(int i = 0;i<categorys.length;i++){
			HashMap<String,Object> map = new HashMap<String,Object>();
			map.put("category_title",categorys[i]);
			list.add(map);
		}
		
		// 绑定数据
		SimpleAdapter adapter = new CustomSimplerAdapter(this,list,R.layout.category_title,new String[]{"category_title"},new int[]{R.id.category_title});
		
		GridView view = new GridView(this);
		view.setColumnWidth(55);
		view.setNumColumns(GridView.AUTO_FIT);
		view.setGravity(Gravity.CENTER);
		view.setSelector(new ColorDrawable(Color.TRANSPARENT));
		
		view.setOnItemClickListener(new OnItemClickListener() {
			
			@Override
			public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
				// 重置其他分类样式
				TextView textView;
				for(int i = 0;i<parent.getChildCount();i++){
					textView = (TextView)parent.getChildAt(i);
					textView.setBackgroundDrawable(null);
					textView.setTextColor(getResources().getColor(R.color.black));
				}
				
				// 设置当前点击的分类样式
				TextView categoryView = (TextView)view;
				categoryView.setBackgroundColor(getResources().getColor(R.color.select_category));
				categoryView.setTextColor(getResources().getColor(R.color.white));
			}
			
		});
		
		// 设置相关参数
		int width = categorys.length * 55;
		LayoutParams params = new LayoutParams(width, LayoutParams.WRAP_CONTENT);
		
		view.setLayoutParams(params);
		view.setAdapter(adapter);
		
		// 设置View
		LinearLayout linearLayout = (LinearLayout)findViewById(R.id.newsCategory);
		linearLayout.addView(view);
		
		final HorizontalScrollView horizontalScrollView = (HorizontalScrollView)findViewById(R.id.navigate);
		
		// 滑动按钮 绑定事件
		ImageButton button = (ImageButton)findViewById(R.id.add);
		button.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// 滚动
				horizontalScrollView.fling(600);
			}
		});
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.index, menu);
		return true;
	}

}