无法动态填充表 | 无法动态填充表

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问题描述

我试图从数据库中提取数据，并把它的内容以表格形式。我在网上查找各种教程和结构性我的code如下，但不会以表格形式显示数据在所有。当使用一个TextView工作正常。这里是我的code，请知道我要去哪里错了。遇到不强制关闭，只是数据不会显示！

 包com.example.callandmessagemanager;进口android.app.Activity;
进口android.database.Cursor;
进口android.graphics.Color;
进口android.os.Bundle;
进口android.view.ViewGroup.LayoutParams;
进口android.widget.LinearLayout;
进口android.widget.ScrollView;
进口android.widget.TableLayout;
进口android.widget.TableRow;
进口android.widget.TextView;
进口android.widget.Toast;
公共类ViewEncryptedMessages延伸活动{    的LinearLayout L，
    曲儿q;
    公共无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.viewencryptedmessages）;
        L =（的LinearLayout）findViewById（R.id.LinearLayout1）;
        TableLayout TL =（TableLayout）findViewById（R.id.TL）;
        Q =新曲儿（本）;
        q.open（）;
        游标c1;
        C1 = q.fetchAllTodos（）;
        长C0 = 1;
        诠释计数= c1.getCount（）;        如果（C1！= NULL）
        {
            做
            {
                的TextView吨;                光标C = q.fetchTodo（C0）;
                字符串消息= c.getString（c.getColumnIndexOrThrow（quer.KEY_MESSAGE））;
                串号= c.getString（c.getColumnIndexOrThrow（quer.KEY_NUMBER））;                TR的TableRow =新的TableRow（本）;
                TextView的TV1 =新的TextView（本）;
                TextView中TV2 =新的TextView（本）;
                CreateView的（TR，TV1，消息）;
                CreateView的（TR，TV2，数）;
                TL.addView（TR）;                / *的LayoutParams LA =新的LayoutParams（LayoutParams.WRAP_CONTENT，LayoutParams.WRAP_CONTENT）;
                T =新的TextView（本）;
                t.setLayoutParams（LA）;                t.setText（信息+\\ t+号）;
                L.addView（T）; * /
                C0 ++;
            }而（C0＆LT; = c1.getCount（））;
            q.close（）;
        }
        其他
        {
            q.close（）;
            Toast.makeText（这一点，不加密消息尚未收到，Toast.LENGTH_SHORT）.show（）;
        }
    }    公共无效CreateView的（TR的TableRow，TextView的T，串可视数据）{
        t.setText（可视数据）;
        //调整的TextView的调性质
        t.setLayoutParams（新的LayoutParams（LayoutParams.WRAP_CONTENT，LayoutParams.WRAP_CONTENT））;
        t.setTextColor（Color.DKGRAY）;
        t.setBackgroundColor（Color.CYAN）;
        t.setPadding（20，0，0，0）;
        tr.setPadding（0，1，0，1）;
        //tr.setBackgroundColor(Color.BLACK）;
        tr.addView（T）; //添加的TextView排。
        }
}

解决方案

试试这个

在你的 CreateView的法

替换该

<$c$c>t.setLayoutParams(newLayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));

本

  t.setLayoutParams（新TableRow.LayoutParams（TableRow.LayoutParams.WRAP_CONTENT，TableRow.LayoutParams.WRAP_CONTENT））;

当您添加布局PARAMS同时加入以表，你必须确保你的布局PARAMS是的TableRow的。

I'm trying to fetch data from a database and placing its content in a Table format. I've looked up various tutorials online and structured my code as follows, but it wouldn't show the data in a table format at all. Works fine when a TextView is used. Here's my code, please know where I'm going wrong. No force close is encountered, just that the data won't display!

package com.example.callandmessagemanager;

import android.app.Activity;
import android.database.Cursor;
import android.graphics.Color;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.widget.Toast;


public class ViewEncryptedMessages extends Activity{

    LinearLayout L;
    quer q;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.viewencryptedmessages);
        L=(LinearLayout)findViewById(R.id.LinearLayout1);
        TableLayout TL = (TableLayout)findViewById(R.id.TL);


        q = new quer(this);
        q.open();
        Cursor c1;
        c1=q.fetchAllTodos();
        long c0=1;
        int count = c1.getCount();

        if(c1!=null)
        {
            do
            {
                TextView t;

                Cursor c=q.fetchTodo(c0);
                String message = c.getString(c.getColumnIndexOrThrow(quer.KEY_MESSAGE));
                String number = c.getString(c.getColumnIndexOrThrow(quer.KEY_NUMBER));

                TableRow tr = new TableRow(this);
                TextView tv1 = new TextView(this);
                TextView tv2 = new TextView(this);
                createView(tr, tv1, message);
                createView(tr, tv2, number);
                TL.addView(tr);

                /*LayoutParams la=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
                t=new TextView(this);
                t.setLayoutParams(la);

                t.setText(message+" \t"+number);
                L.addView(t);*/


                c0++;
            }while(c0<=c1.getCount());
            q.close();
        }
        else
        {
            q.close();
            Toast.makeText(this, "No Encrypted Messages Received yet", Toast.LENGTH_SHORT).show();
        }


    }

    public void createView(TableRow tr, TextView t, String viewdata) {
        t.setText(viewdata);
        //adjust the porperties of the textView
        t.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
        t.setTextColor(Color.DKGRAY);
        t.setBackgroundColor(Color.CYAN);
        t.setPadding(20, 0, 0, 0);
        tr.setPadding(0, 1, 0, 1);
        //tr.setBackgroundColor(Color.BLACK);
        tr.addView(t); // add TextView to row.
        }
}

解决方案

Try this

In your createView method

replace this

t.setLayoutParams(newLayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));

with this

 t.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT,TableRow.LayoutParams.WRAP_CONTENT));

Whenever you are adding layout params while adding view to Table, You have to make sure that your layout params are of TableRow.

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