How can I remove a button or make it invisible in Android?

Android Apps/Applications Mobile Development

This example demonstrates how remove a button or make it invisible in android.

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:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical"
   tools:context=".MainActivity">
   <EditText android:id="@+id/speed" android:maxLines="1"
      android:layout_marginTop="2dip" android:layout_width="wrap_content"
      android:ems="25" android:layout_height="wrap_content"
      android:autoText="true" android:scrollHorizontally="true" />
   <Button android:id="@+id/button1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" android:text="button1" />
      <Button android:id="@+id/button2"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" android:text=" button2" />
</LinearLayout>

Step 3 − Add the following code to src/MainActivity.java

package com.example.sample;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
   OnClickListener listener1=null;
   OnClickListener listener2=null;
   Button button1;
   Button button2;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      listener1=new OnClickListener() {
         public void onClick(View v) {
            setTitle("button1");
            button1.setVisibility(View.INVISIBLE);
            button2.setVisibility(View.VISIBLE);
         }
      };
      listener2=new OnClickListener() {
         public void onClick(View v) {
            setTitle("button2");
            button2.setVisibility(View.INVISIBLE);
            button1.setVisibility(View.VISIBLE);
         }
      };
      setContentView(R.layout.activity_main);
      button1=(Button) findViewById(R.id.button1);
      button1.setOnClickListener(listener1);
      button2=(Button) findViewById(R.id.button2);
      button2.setOnClickListener(listener2);
   }
}

Step 4 − 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

Azhar

Published on 30-Aug-2019 10:52:43

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