Android：TableLayout不显示

Question

I'm new to Android app programming.

I'm trying to use a Table Layout to list some notes. Because their number shouldn't be limited, I have to integrate it programically.

I created a new project for test purposes:

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ScrollView;
import android.widget.TableLayout;
import android.widget.TableRow;

public class MainActivity extends AppCompatActivity {

    private TableLayout table;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        LayoutInflater inflater = (LayoutInflater) getSystemService(MainActivity.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.activity_main, null);

        table = view.findViewById(R.id.table);
        table.setOrientation(TableLayout.HORIZONTAL);


        TableRow tr = new TableRow(MainActivity.this);
        TableRow.LayoutParams paramrow = new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.MATCH_PARENT);
        tr.setLayoutParams(paramrow);

        Button b = new Button(this);
        b.setText("Dynamic Button");
        b.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.MATCH_PARENT));
        tr.addView(b);
        table.addView(tr, TableLayout.LayoutParams.MATCH_PARENT, TableLayout.LayoutParams.MATCH_PARENT);
    }
}

My XML:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.chrobin.beung.MainActivity">

    <TableLayout
        android:id="@+id/table"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:orientation="horizontal"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <TableRow
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </TableLayout>
</android.support.constraint.ConstraintLayout>

It isn't a duplicate because all answers by now involved using TableRow.LayoutParams instead os LayoutParams.

Thanks!

Answer 1

Change your XML file with this below code , you was using 0dp as height and width of your table so it was not working , i have corrected your code -

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.chrobin.beung.MainActivity">

    <TableLayout
        android:id="@+id/table"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:orientation="horizontal"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

        <TableRow
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </TableLayout>
</android.support.constraint.ConstraintLayout>