intent Android example

--> Intent Android Example

 Package Explorer

Intent Android Activity.java

package android.example.intent;

import android.app.Activity;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

public class IntentAndroidActivity extends Activity {

   

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

       

        final Button btn1 = (Button)findViewById(R.id.button1);      

        btn1.setOnClickListener(new View.OnClickListener() {

           

            public void onClick(View v) {                  

                  startActivity(new Intent("android.example.intent.activity2"));

                  }

            });

       

        // Calling Built-In Applications Using Intents

       

        final Button btn2 = (Button)findViewById(R.id.button2);      

        btn2.setOnClickListener(new View.OnClickListener() {                 

            public void onClick(View v) {

                 

                  Intent i = new Intent(android.content.Intent.ACTION_VIEW,                          

                                          Uri.parse("http://www.google.com"));                 

                  startActivity(i);

                  }

        });

       

        final Button btn3 = (Button)findViewById(R.id.button3);      

        btn3.setOnClickListener(new View.OnClickListener() {                 

            public void onClick(View v) {

                 

                  Intent i = new Intent(android.content.Intent.ACTION_DIAL,

                              Uri.parse("tel:+651234567"));                  

                  startActivity(i);

                  }

        });

    }

}

Activity2.java

package android.example.intent;

import android.app.Activity;

import android.os.Bundle;

public class activity2 extends Activity {

     

     

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity2);

                                      

    }// onCreate

      

}

 main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="@drawable/bg"

    android:orientation="vertical" >

    <TextView

        android:layout_width="224dp"

        android:layout_height="wrap_content"

        android:layout_gravity="center_horizontal"

        android:text="Android Intent"

        android:textColor="#FF00FF"

        android:textSize="30dp" />

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="50dp"

        android:layout_marginTop="20dp"

        android:textSize="26dp"

        android:text="Intent to Activity2" />

<Button

        android:id="@+id/button2"

        android:layout_width="wrap_content"

        android:layout_height="50dp"

        android:layout_marginTop="20dp"

        android:textSize="26dp"

        android:text="Intent.ACTION_VIEW" />

<Button

        android:id="@+id/button3"

        android:layout_width="wrap_content"

        android:layout_height="50dp"

        android:layout_marginTop="20dp"

        android:textSize="26dp"

        android:text="Intent.ACTION_DIAL" />

 <TextView

     android:id="@+id/textView1"

     android:layout_width="match_parent"

     android:layout_height="match_parent"

     android:layout_marginLeft="20dp"

     android:layout_marginTop="180dp"

     android:text="main.xml"

     android:textAppearance="?android:attr/textAppearanceMedium"

     android:textColor="#FF0000"

     android:textSize="26dp" />

</LinearLayout>

 activity2.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="#FFBB33"

    android:orientation="vertical" >

    <ScrollView

        android:id="@+id/scrollView1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" >

        <LinearLayout

            android:id="@+id/linearLayout2"

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:orientation="vertical" >

            <TextView

                android:id="@+id/textView1"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:layout_gravity="center_horizontal"

                android:text="Activity 2"

                android:textColor="#FF00FF"

                android:textSize="30dp" />

            <Button

                android:id="@+id/button1"

                android:layout_width="66dp"

                android:layout_height="38dp"

                android:background="#00FF00"

                android:text="Button 1" />

            <LinearLayout

                android:id="@+id/linearLayout1"

                android:layout_width="match_parent"

                android:layout_height="match_parent" >

                <Button

                    android:id="@+id/button3"

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:layout_weight="2"

                    android:background="@drawable/ic_launcher"

                    android:text="Button" />

                <Button

                    android:id="@+id/button4"

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:layout_weight="2"

                    android:text="Button" />

                <Button

                    android:id="@+id/button5"

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:layout_weight="2"

                    android:text="Button" />

                <Button

                    android:id="@+id/button6"

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:layout_weight="2"

                    android:text="Button" />

                <Button

                    android:id="@+id/button7"

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:layout_weight="2"

                    android:text="Button" />

            </LinearLayout>

        </LinearLayout>

    </ScrollView>

    <TextView

        android:id="@+id/textView2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginLeft="20dp"

        android:layout_marginTop="300dp"

        android:text="activity2.xml"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:textColor="#FF0000" />

</LinearLayout>

AndroidMainifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="android.example.intent"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:name=".IntentAndroidActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

       

        <activity

            android:name=".activity2"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.example.intent.activity2" />

                <category android:name="android.intent.category.DEFAULT" />

            </intent-filter>

        </activity>

       

    </application>

</manifest>

Calling Built-In Applications Using Intents

 

 

In the first button, you create an Intent object and then pass two arguments to its constructor — the

action and the data:

Intent i = new Intent(android.content.Intent.ACTION_VIEW,

Uri.parse(“http://www.amazon.com”));

startActivity(i);

Intent i = new Intent(android.content.Intent.ACTION_DIAL,

Uri.parse(“tel:+651234567”)); 
startActivity(i);

Understanding the Intent Object

You can also create an Intent object by passing in an action constant and data, such as the following:

Intent i = new Intent(android.content.Intent.ACTION_VIEW,

Uri.parse(“http://www.amazon.com”));

startActivity(i);

The action portion defines what you want to do, while the data portion contains the data for the target

activity to act upon. You can also pass the data to the Intent object using the setData() method:

Intent i = new Intent(android.content.Intent.ACTION_VIEW); 
i.setData(Uri.parse(“http://www.amazon.com”));

For some intents, there is no need to specify the data. For example, to select a contact from the Contacts

application, you specify the action and then indicate the MIME type using the setType() method:

Intent i = new Intent(android.content.Intent.ACTION_PICK);

i.setType(ContactsContract.Contacts.CONTENT_TYPE);

To summarize, an Intent object can contain the following information:

➤➤ Action

➤➤ Data

➤➤ Type

➤➤ Category

Download Android intent example code

Android Control ควบคุมอุปกรณ์ต่างๆ ด้วย Android

http://androidcontrol.blogspot.com

สอนเขียน Android  สอนเขียนโปรแกรม Android

http://androidcontrol.blogspot.com/2012/01/beginning-android-training-android.html

-->