ListView 使用问题

问题1：不能动态获取ViewHolder的TextView控件的getlinecount()，只能返回0？

if(convertView == null){
	convertView = lInflater.inflate(R.layout.listview, null);
	holder = new ViewHolder();
	holder.text2 = (TextView)convertView.findViewById(R.id.TextView02);
	convertView.setTag(holder);
}else{
	holder = (ViewHolder)convertView.getTag();
}

holder.text2.setText(arr2[position]);
int lineCnt = holder.text2.getLineCount();

static class ViewHolder{
    TextView text2;
}

解决方法：

holder.text2.setText(arr2[position]);
holder.text2.post(new Runnable() {
	@Override
	public void run() {
		int lineCnt = holder.text2.getLineCount();
		// Perform any actions you want based on the line count here.
	}
});

问题2：ListView 的Item布局文件中，有TextView控件，TextView控件的内容行数会变化，全部不能肯定大小，致使android:layout_weight="1"或height为match_parent的控件不能显示

解决方法： public View getView(int position, View convertView, ViewGroup parent) 中须要计算根布局控件的高度 // 计算ListView 的Item的高度（系统不能自动肯定） adjustMemoHeight(viewHolder);

/**
 * 调整ListView Item 的高度
 *
 * @param viewHolder
 */

private static void adjustMemoHeight(ViewHolder viewHolder) {

	int totalHeight = 0; //统计高度
	// 测量全部包含控件的高度
	viewHolder.tv_time.measure(0,0);
	viewHolder.tv_action.measure(0,0);
	viewHolder.tv_memo.measure(0,0);
	viewHolder.tv_voice.measure(0,0);

	//int memoHeight = viewHolder.tv_memo.getLineHeight() * viewHolder.tv_memo.getLineCount();
	//int padding =viewHolder.tv_memo.getCompoundPaddingTop() + viewHolder.tv_memo.getPaddingBottom();

	totalHeight = viewHolder.tv_time.getMeasuredHeight()
			+ viewHolder.tv_action.getMeasuredHeight()
			+ viewHolder.tv_memo.getMeasuredHeight()
			+ viewHolder.tv_memo.getLineHeight()  // 加一行文本高度，系统测定有些会少算一行（但最后一行只有2，3个字时）
	;
	if(viewHolder.tv_voice.getVisibility() == View.VISIBLE){
		totalHeight += viewHolder.tv_voice.getMeasuredHeight() ;
	}

	//Log.d(TAG, "totalHeight====" + totalHeight
	//		+ "，1="+ viewHolder.tv_time.getMeasuredHeight()
	//		+ "，2="+ viewHolder.tv_action.getMeasuredHeight()
	//		+ "，3="+ viewHolder.tv_memo.getMeasuredHeight()
	//		+"=高度="+memoHeight +"=padding高度="+padding
	//		+ "，4="+ viewHolder.tv_voice.getMeasuredHeight()
	//);

	//viewHolder.rl_item为根布局控件
	ViewGroup.LayoutParams params = viewHolder.rl_item.getLayoutParams();
	params.height = totalHeight;
}

问题3：ListView中嵌套ListView的高度问题

解决方法：计算ListView的子控件高度总和，从新设置ListView 的高度

/** 
 * 设置Listview的高度 
 */  

public void setListViewHeight(ListView listView) {   

    ListAdapter listAdapter = listView.getAdapter();    
    if (listAdapter == null) {   
        return;   
    }   
	
    int totalHeight = 0;   
    for (int i = 0; i < listAdapter.getCount(); i++) {   
        View listItem = listAdapter.getView(i, null, listView);   
        listItem.measure(0, 0);   
        totalHeight += listItem.getMeasuredHeight();   
    }   

    ViewGroup.LayoutParams params = listView.getLayoutParams();   
    params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));   
    listView.setLayoutParams(params);  
}