Apk android is crooked, the display of elements is incorrect, how to fix it?

Question

Java

Started learning android in android studio.
With the help of the editor, I brought out a couple of buttons and a text field, added a button handler, etc.
Collected the project, uploaded to the phone. But the display is not correct. All items are in the top right corner.
The code:

public class MainActivity extends AppCompatActivity {
    private TextView text = null;
    private Button OK = null;
    private Button cancel = null;

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

        text = (TextView) findViewById(R.id.textView);
        OK = (Button) findViewById(R.id.button);
        cancel = (Button) findViewById(R.id.button2);

        OK.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view) {
                text.setText("You pressed OK button!");
                OK.setEnabled(false);
                cancel.setEnabled(true);
            }
        });

        cancel.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view) {
                text.setText("You pressed Cancel button!");
                OK.setEnabled(true);
                cancel.setEnabled(false);
            }
        });
    }
}

XML code

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

    <TextView
        android:id="@+id/textView"
        android:layout_width="179dp"
        android:layout_height="42dp"
        android:text="Hello this world"
        tools:layout_editor_absoluteX="34dp"
        tools:layout_editor_absoluteY="16dp" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="OK"
        tools:layout_editor_absoluteX="34dp"
        tools:layout_editor_absoluteY="75dp" />

    <Button
        android:id="@+id/button2"
        android:layout_width="118dp"
        android:layout_height="46dp"
        android:text="Cancel"
        tools:layout_editor_absoluteX="34dp"
        tools:layout_editor_absoluteY="149dp" />
</android.support.constraint.ConstraintLayout>

It is worth that the rendering of the smartphone window caused an error and I had to change the line in Grald Scripts, build.grald from
implementation 'com.android.support:appcompat-v7:28.0.0-beta01'
to
implementation 'com.android.support:appcompat-v7 :28.0.0-alpha1'

Answer 1

well, you should at least google for decency

Answer 2

You need to make a binding, Google to the rescue

Answer 3

Hello!
You are using ConstraintLayout. Find the Infer Constraints button in Android Studio and click (available in the compositor in visual editor mode). This will add constraints and bind.
https://stackoverflow.com/questions/46977540/infer...