Unable to dynamically populate a table

问题

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.
        }
}

回答1:

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.

来源：https://stackoverflow.com/questions/15732729/unable-to-dynamically-populate-a-table