Showing posts with label open activity.. Show all posts
Showing posts with label open activity.. Show all posts

Friday, December 23, 2016

Intent, Explicit Intent

Intent is a communication medium between components. Like Activities, Services, Receivers and internal components like contact list, camera etc. 

When a intent is created with directly define target component then it is called Explicit Intent.

 
 
 
 
Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("name", "Call By Explicit Intent.");
startActivity(intent);




Steps to use Explicit Intent in your project.
  1. Crate a project in android studio.
  2.  Open your main_activity.xml and update it-
    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="com.pankaj.explicitintent.demo.MainActivity">
    
        <Button
            android:layout_width="match_parent"
            android:text="Explicit Intent"
            android:onClick="openSecondActivity"
            android:layout_height="wrap_content" />
    
    </RelativeLayout>
    
      
  3. Open your MainActivity.JAVA class and update it for change text at run time-

    package com.pankaj.explicitintent.demo;
    
    import android.content.Intent;
    import android.os.Bundle;
    import android.support.v7.app.AppCompatActivity;
    import android.view.View;
    
    public class MainActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
    
        //___________methode will be call when click on "Explicit Intent"
        public void openSecondActivity(View view) {
    
            //__________create intent to open SecondActivity.
            Intent intent = new Intent(this, SecondActivity.class);
    
            //__________put some data for sending to second activity.
            intent.putExtra("name", "Call By Explicit Intent.");
    
            //____________call to start the second activity.
            startActivity(intent);
        }
    }
    
    

  4. Create an activity(MainActivity.java) which will be open by explicit intent. Open your MainActivity.java and update it-


    package com.pankaj.explicitintent.demo;
    
    import android.os.Bundle;
    import android.support.v7.app.AppCompatActivity;
    import android.widget.Toast;
    
    public class SecondActivity extends AppCompatActivity {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_second);
    
            //____________get data which is sent from mainactivity by intent
            String name = getIntent().getStringExtra("name");
    
            //____________Show this data into the toast.
            Toast.makeText(this, name, Toast.LENGTH_SHORT).show();
        }
    }
    

  5. Open your activity_second.xml and update it-


    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="com.pankaj.explicitintent.demo.SecondActivity">
    
        <TextView
            android:layout_centerInParent="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="second activity" />
    
    </RelativeLayout>
    
    


     
  6. Now all the development process for Explicit Intent has completed, Please run the application.


     
  7. Click on "Explicit Intent".
     



  8.  Good bye, Thanks to read this blog.