Android Intent Example

                                                       Intents

An Intent is a messaging object. We can use to request an action from an other application component. Although intents facilitate communication between components in several ways.

Types of Intents:

There are two types of intents:

• Explicit intents specify the component to start by name (the fully-qualified class name). You'll typically use an explicit intent to start a component in your own app, because you know the class name of the activity or service you want to start. For example, start a new activity.

• Implicit intents do not name a specific component, but instead declare a general action to perform, which allows a component from another app to handle it. For example, if you want to show the user a location on a map, you can use an implicit intent to request that another capable app show a specified location web url.

IntentExample.java

package com.example.crudapps;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.widget.Button;

public class IntentExample extends Activity implements OnClickListener {
    Button btn_explicit,btn_implicit,btn_weburl;
   
   
    Intent mintent;
   
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_intent_example);
       
        btn_explicit = (Button)findViewById(R.id.btn_explicit);
        btn_explicit.setOnClickListener(this);
        btn_implicit = (Button)findViewById(R.id.btn_implicit);
        btn_implicit.setOnClickListener(this);
        btn_weburl = (Button)findViewById(R.id.btn_weburl);
        btn_weburl.setOnClickListener(this);
       
       
       
    }

    @Override
    public void onClick(View v) {
       
        switch(v.getId())
        {
        case R.id.btn_explicit:
                      
            mintent = new Intent(IntentExample.this,NextActivity.class);
            startActivity(mintent);
           
            break;
        case R.id.btn_implicit:
           
            mintent = new Intent(Intent.ACTION_VIEW,Uri.parse("http://chandandroid.blogspot.in/"));
            startActivity(mintent);
           
            break;
        case R.id.btn_weburl:
           
            WebView myWebView = (WebView) findViewById(R.id.webView1);
            myWebView.loadUrl("http://chandandroid.blogspot.in/");
           
            break;
        }
    }
   
   
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.intent_example, menu);
        return true;
    }

}


activity_intent_example.xml

<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"
    android:background="@drawable/bg_background"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.crudapps.IntentExample" >

    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:orientation="vertical" >

        <Button
            android:id="@+id/btn_explicit"
            android:layout_width="458dp"
            android:layout_height="wrap_content"
            android:text="Explicit" />

        <Button
            android:id="@+id/btn_implicit"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Implicit" />

        <Button
            android:id="@+id/btn_weburl"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Web URL" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/linearLayout1"
        android:layout_below="@+id/linearLayout1"
        android:layout_marginLeft="96dp"
        android:layout_marginTop="53dp"
        android:orientation="vertical" >
    </LinearLayout>

    <WebView
        android:id="@+id/webView1"
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:layout_alignParentLeft="true"
        android:layout_alignTop="@+id/linearLayout2" />

</RelativeLayout>


Screen:-

Explicit Intent

Implicit Intent