Android Code Example: มิถุนายน 2012

--> PutExtra Android Example Code

PutExtra.java

package com.example.extra;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

public class PutExtra extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.putextra);

final EditText et = (EditText)findViewById(R.id.et);

Button bn = (Button)findViewById(R.id.bn);

bn.setOnClickListener(new OnClickListener() {

public void onClick(View arg0) {

Intent intent = new Intent(PutExtra.this, getExtra.class);

intent.putExtra("text", et.getText().toString());

startActivity(intent);

}

});

}

getExtra.java

package com.example.extra;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.widget.TextView;

public class getExtra extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.getextra);

TextView tv = (TextView)findViewById(R.id.tv);

Intent intent = getIntent();

String extra = intent.getStringExtra("text");

tv.setText(extra);

}

putextra.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="#AA66CC"

android:orientation="vertical" >

<EditText

android:id="@+id/et"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="Put Extra Data" />

<Button

android:id="@+id/bn"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="putExtra"/>

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="20dp"

android:layout_marginTop="300dp"

android:textSize="26dp"

android:textColor="#0000FF"

android:text="putextra.xml"

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

</LinearLayout>

getextra.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="#FF4444"

android:orientation="vertical" >

<TextView

android:id="@+id/tv"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_marginTop="20dp"

android:text="Get Extra"

android:textColor="#000000"

android:background="#FFBB33"

android:textSize="30dp" />

<TextView

android:id="@+id/textView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginLeft="20dp"

android:layout_marginTop="300dp"

android:text="getextra.xml"

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

</LinearLayout>

Passing Data Using an Intent Object

How It Works

To use the Intent object to carry data to the target activity, you made use of a Bundle object:

Bundle extras = new Bundle();

extras.putString(“Name”, “Your name here”);

i.putExtras(extras);

Bundle extras = getIntent().getExtras();

if (extras!=null)

{

defaultName = extras.getString(“Name”);

}

//---get the EditText view---

EditText txt_username =

(EditText) findViewById(R.id.txt_username);

txt_username.setHint(defaultName);

Download put Extra Android 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

ติดต่อ amphancm@gmail.com

--> 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>

</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>

</intent-filter>

</activity>

<activity

android:name=".activity2"

android:label="@string/app_name" >

<intent-filter>

</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

-->

Android Code Example

วันพฤหัสบดีที่ 28 มิถุนายน พ.ศ. 2555

PutExtra Android

intent Android example