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Add and Remove Views in Android Dynamically?
This example demonstrates how to Add and Remove Views in Android Dynamically.
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.xml.
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/parent_linear_layout" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" android:layout_margin="5dp" android:orientation="vertical"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="50dp" android:orientation="horizontal" > <EditText android:id="@+id/number_edit_text" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="5" android:inputType="phone"/> <Spinner android:id="@+id/type_spinner" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="3" android:entries="@array/types" android:gravity="right" /> <Button android:id="@+id/delete_button" android:layout_width="0dp" android:layout_height="40dp" android:layout_weight="1" android:background="@android:drawable/ic_delete" android:onClick="onDelete"/> </LinearLayout> <Button android:id="@+id/add_field_button" android:layout_width="100dp" android:layout_height="wrap_content" android:layout_marginBottom="5dp" android:layout_marginLeft="5dp" android:layout_marginRight="5dp" android:background="#555" android:layout_gravity="center" android:onClick="onAddField" android:textColor="#FFF" android:text="Add Field" android:paddingLeft="5dp"/> </LinearLayout>
Step 2 − Add the following code to res/layout/field.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="50dp" android:orientation="horizontal"> <EditText android:id="@+id/number_edit_text" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="5" android:inputType="phone"/> <Spinner android:id="@+id/type_spinner" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="3" android:entries="@array/types" android:gravity="right" /> <Button android:id="@+id/delete_button" android:layout_width="0dp" android:layout_height="40dp" android:layout_weight="1" android:background="@android:drawable/ic_delete" android:onClick="onDelete"/> </LinearLayout>
Step 3 − Add the following code to res/values/strings.xml
<resources> <string name="app_name">Sample</string> <string-array name="types"> <item>Mobile</item> <item>Office</item> <item>Home</item> </string-array> </resources>
Step 4 − Add the following code to res/values/styles.xml
<resources> <!-- Base application theme. --> <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"> <!-- Customize your theme here. --> <item name="colorPrimary">@color/colorPrimary</item> <item name="colorPrimaryDark">@color/colorPrimaryDark</item> <item name="colorAccent">@color/colorAccent</item> <item name="actionBarSize">36dip</item> </style> </resources>
Step 5 − Add the following code to src/MainActivity.java
package com.example.sample;
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
public class MainActivity extends AppCompatActivity {
private LinearLayout parentLinearLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
parentLinearLayout=(LinearLayout) findViewById(R.id.parent_linear_layout);
}
public void onAddField(View v) {
LayoutInflater inflater=(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final View rowView=inflater.inflate(R.layout.field, null);
// Add the new row before the add field button.
parentLinearLayout.addView(rowView, parentLinearLayout.getChildCount() - 1);
}
public void onDelete(View v) {
parentLinearLayout.removeView((View) v.getParent());
}
}Step 6 − Add the following code to manifests/AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.sample"> <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 −
Click here to download the project code
Updated on: 03-Jul-2020
3K+ Views
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