How to Call Oncreate Again Android

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How to reload activeness in Android?

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In some situations, we need to recall activeness again from onCreate(). This instance demonstrates how to reload activity in Android.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Projection and fill all required details to create a new project.

Footstep 2 − Add the following code to res/layout/activity_main.xml.

<?xml version = "1.0" encoding = "utf-eight"?> <LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"    android:id = "@+id/parent"    xmlns:tools = "http://schemas.android.com/tools"    android:layout_width = "match_parent"    android:layout_height = "match_parent"    tools:context = ".MainActivity"    android:gravity = "heart"    android:orientation = "vertical">    <TextView       android:id = "@+id/text"       android:textSize = "28sp"       android:textAlignment = "center"       android:layout_width = "match_parent"       android:layout_height = "wrap_content" /> </LinearLayout>

In the above lawmaking, We have taken text view, when a user clicks on text view, it will call Main Activity again.

Footstep 3 − Add the post-obit code to src/MainActivity.java

package com.example.andy.myapplication; import android.content.Intent; import android.os.Build; import android.bone.Bundle; import android.support.annotation.RequiresApi; import android.back up.v7.app.AppCompatActivity; import android.view.View; import android.widget.TextView; public course MainActivity extends AppCompatActivity {    int view = R.layout.activity_main;    TextView textview;    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(view);       textview = findViewById(R.id.text);       textview.setText("Click here to recall activeness");       textview.setOnClickListener(new View.OnClickListener() {          @Override          public void onClick(View five) {             Intent i = new Intent(MainActivity.this, MainActivity.course);             finish();             overridePendingTransition(0, 0);             startActivity(i);             overridePendingTransition(0, 0);          }       });    } }

In the above code, we accept used Intent to recreate an activity as shown below -

Intent i = new Intent(MainActivity.this, MainActivity.form); cease(); overridePendingTransition(0, 0); startActivity(i); overridePendingTransition(0, 0);

In the to a higher place code, nosotros have used overridePendingTransition(), information technology is used to remove activity create animation while re-creating activity.

Let's endeavor to run your application. I assume you accept connected your actual Android Mobile device with your calculator. To run the app from android studio, open one of your projection's activity files and click Run  icon from the toolbar. Select your mobile device equally an option and so check your mobile device which will display your default screen −

In the above result, it has shown default screen when you click on text view, it volition re-create Main Activeness from onCreate() as shown below -

Click here to download the project code

Published on 30-Jan-2019 11:35:12

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Source: https://www.tutorialspoint.com/how-to-reload-activity-in-android

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