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How to set margins in an Android LinearLayout programmatically?
This example demonstrate about How to set margins in an Android LinearLayout programmatically.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.java
<? xml version= "1.0" encoding= "utf-8" ?> <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" xmlns: tools = "http://schemas.android.com/tools" android :layout_width= "match_parent" android :id= "@+id/linearLayout" android :layout_height= "match_parent" android :orientation= "vertical" tools :context= ".MainActivity" />
Step 3 − Add the following code to src/MainActivity.java
package app.tutorialspoint.com.sample ; import android.os.Bundle ; import android.support.v7.app.AppCompatActivity ; import android.widget.Button ; import android.widget.LinearLayout ; public class MainActivity extends AppCompatActivity { @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ; setContentView(R.layout. activity_main ) ; LinearLayout ll = findViewById(R.id. linearLayout ) ; LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams( LinearLayout.LayoutParams. MATCH_PARENT , LinearLayout.LayoutParams. WRAP_CONTENT ) ; layoutParams.setMargins( 30 , 20 , 30 , 0 ) ; Button okButton= new Button( this ) ; okButton.setText( "some text" ) ; ll.addView(okButton , layoutParams) ; } }
Step 4 − Add the following code to androidManifest.xml
<? xml version= "1.0" encoding= "utf-8" ?> <manifest xmlns: android = "http://schemas.android.com/apk/res/android" package= "app.tutorialspoint.com.sample" > <uses-permission android :name= "android.permission.VIBRATE" /> <application android :allowBackup= "true" android :icon= "@mipmap/ic_launcher" android:label= "@string/app_name" android:roundIcon= "@mipmap/ic_launcher_round" android:supportsRtl= "true" android:theme= "@style/AppTheme" > <activity android:name= ".MainActivity" > <intent-filter> <action android:name= "android.intent.action.MAIN" /> <category android:name= "android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –
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