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This article mainly introduces "how to use Android component LinearLayout". In daily operation, I believe many people have doubts about how to use Android component LinearLayout. Xiaobian consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "how to use Android component LinearLayout". Next, please follow the editor to study!

Overview

LinearLayout is a linear layout component in which components are sorted and distributed by column or row (that is, vertical or horizontal).

Common XML configuration properties (1) android:orientation

How to set LinearLayout container layout components: only values can be horizontal (horizontal), vertical (vertical)

(2) android:gravity

Sets the alignment of components for the layout within the LinearLayout container.

Values include top, bottom, left, right, center, start, end (top, bottom, left, right, center, start, end)

(3) attributes inherited in View

(including android:background, android:visibility, etc.) There are also some intervals that improve the beauty of placing components)

1. Android:layout_width and android:layout_height (match_parent/wrap_content)

2. Android: layout_gravity sets the layout of components in the container

3. Android:layout_weight sets the ratio of the spare display space occupied by the component

4. Android:layout_margin, android:layout_marginTop, android:layout_marginBottom, android:layout_marginLeft, android:layout_marginRight set the outer boundary of the component, similar to the use of margin in our web design HTML/CSS.

Code example

Activity_main.xml

MainActivity.java

Package com.example.android_demo02; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle;import android.view.Gravity;import android.widget.LinearLayout;import android.widget.RadioGroup; public class MainActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener {private RadioGroup orientation; private RadioGroup gravity; @ Override protected void onCreate (Bundle savedInstanceState) {super.onCreate (savedInstanceState); setContentView (R.layout.activity_main); orientation= (RadioGroup) findViewById (R.id.orientation) Orientation.setOnCheckedChangeListener (this); gravity= (RadioGroup) findViewById (R.id.gravity); gravity.setOnCheckedChangeListener (this);} @ Override public void onCheckedChanged (RadioGroup radioGroup, int I) {switch (I) {case R.id.horizontal: orientation.setOrientation (LinearLayout.HORIZONTAL); break Case R.id.vertical: orientation.setOrientation (LinearLayout.VERTICAL); break; case R.id.left: gravity.setGravity (Gravity.START); break; case R.id.center: gravity.setGravity (Gravity.CENTER_HORIZONTAL); break Case R.id.right: gravity.setGravity (Gravity.END); break;}}

Achieve results:

At this point, the study on "how to use Android component LinearLayout" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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