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Set Layout gravity for buttons programmatically

Anonymous User 1949 18-Jan-2016
How would I set layout_gravity programatically for buttons?

I am implementing it , but its simply throws me a NullPointer exception:

 Button MyButton = new Button(this);
    LinearLayout.LayoutParams  lllp=(LinearLayout.LayoutParams)MyButton.getLayoutParams();
    lllp.gravity=Gravity.RIGHT;
    MyButton.setLayoutParams(lllp); 

    MyLinearLayout.addView(MyButton)
android android  android layout 
Updated on 27-Jun-2023
Anonymous User

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2 Answers

Aryan Kumar

Aryan Kumar

27-Jun-2023

Sure, here is how to set layout gravity for buttons programmatically:

Code snippet

import android.content.Context;
import android.view.Gravity;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

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

        // Get the button from the layout.
        Button button = findViewById(R.id.button);

        // Set the gravity of the button.
        int gravity = Gravity.TOP | Gravity.LEFT;
        button.setGravity(gravity);
    }
}

In this code, we first get the button from the layout using the findViewById() method. Then, we set the gravity of the button using the setGravity() method. The setGravity() method takes two arguments: the first argument is the horizontal gravity, and the second argument is the vertical gravity. In this case, we are setting the horizontal gravity to LEFT and the vertical gravity to TOP.

The Gravity class defines a number of constants that you can use to specify the gravity of a view. For example, the Gravity.TOP constant specifies that the view should be placed at the top of its parent. The Gravity.LEFT constant specifies that the view should be placed at the left of its parent.

You can also combine the horizontal and vertical gravity constants using the bitwise OR operator (|). For example, the following code sets the gravity of the button to the top-left corner:

Code snippet

int gravity = Gravity.TOP | Gravity.LEFT;
button.setGravity(gravity);
Anonymous User

Anonymous User

18-Jan-2016 
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT);
params.weight = 1.0f;
params.gravity = Gravity.TOP;
button.setLayoutParams(params);

For more check Gravity

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