GridView 子View 获取

 

在eoe.android论坛浏览时 发现很多人对这个问题有困惑 所以今天说一下

 

 

[代码 步骤]

1. 你要放入GricView 的布局比较复杂 包括一个image & text 且二者以线性排列

 

* 定义图片和文字的数组 供后续使用

int count = 5;
	int[] image = {
			R.drawable.beijing_001_big,R.drawable.beijing_002_big,R.drawable.beijing_003_big,R.drawable.beijing_004_big,R.drawable.beijing_005_big
	};
	String[] name = {
			"贝贝","晶晶","欢欢","盈盈","妮妮"
	};

 

* 定义包含二者的View

 

public View composeLayout(int i){
			LinearLayout layout = new LinearLayout(activity);
	        layout.setOrientation(LinearLayout.VERTICAL);
	        
	        ImageView iv = new ImageView(activity);
	        iv.setImageResource(image[i]);
	        
	        layout.addView(iv,
	        		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
	        
	        
	        TextView tv = new TextView(activity);
	        tv.setGravity(Gravity.CENTER_HORIZONTAL);
	        tv.setTextColor(Color.BLACK);
	        tv.setText(name[i]);
	        
	        layout.addView(tv,
	        		new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT));
	        
	        
	        return layout;
	        
		}

 

 

2. 因为View 不是TextView 所有只能自己扩展BaseAdapter

public class ComplexLayoutAdapter extends BaseAdapter {
    	Activity activity;
    	
    	public ComplexLayoutAdapter(Activity a){
    		activity = a;
    	}
		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return count;
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return null;
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return position;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			return composeLayout(position);
		}
		
		
    }

 

 

3. 使用问题 因为不是今天的重点 就此略过 现在说下 更改 TextView 使之为红色的问题 当其被点击时

grid.setOnItemClickListener(new OnItemClickListener(){

			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1,
					int arg2, long arg3) {
				// TODO Auto-generated method stub
				
				//重置上次颜色为Color.BLACK
				setLastColorBlack();
				
				LinearLayout lLayout = (LinearLayout)arg1;
				
				//ImageView lImage = (ImageView)lLayout.getChildAt(0);
				TextView lText = (TextView)lLayout.getChildAt(1);
				
				//lImage.setBackgroundResource(R.drawable.dot);
				lText.setTextColor(Color.RED);
				
				
			}
        	
        });

 

 

4. 当然 我们还需要把上次点击目标的字体颜色重置

* 定义变量 last 用于标记上次点击的ID

int last = 0;

 

* 修改 setOnItemClickListener() 如下：

grid.setOnItemClickListener(new OnItemClickListener(){

			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1,
					int arg2, long arg3) {
				// TODO Auto-generated method stub
				
				//重置上次颜色为Color.BLACK
				setLastColorBlack();
				
				LinearLayout lLayout = (LinearLayout)arg1;
				
				//ImageView lImage = (ImageView)lLayout.getChildAt(0);
				TextView lText = (TextView)lLayout.getChildAt(1);
				
				//lImage.setBackgroundResource(R.drawable.dot);
				lText.setTextColor(Color.RED);
				
				//保存最新的上次ID
				last = arg2;
			}
        	
        });


public void setLastColorBlack(){
    	LinearLayout lastLayout = (LinearLayout)grid.getChildAt(last);
    	
    	TextView lastText = (TextView)lastLayout.getChildAt(1);
    	
    	lastText.setTextColor(Color.BLACK);
    	
    }

 

 

that's all!

 

6. emulator 运行截图：

 

 

 

现上传代码 供有需要的人！

 

评论

4 楼 JavaJ2me 2011-07-29  

lLayout.getChildAt(1);  
不太理解。。

3 楼 lc228 2010-11-09  

学习中，非常不错，谢谢！

2 楼 goontosoon 2010-05-14  

这篇文章不错，解决问题

1 楼 meiyouren 2010-03-19  

学习了！  谢谢啊