Android Studio: Cara Membuat Android Apps

In this video I start my new Android tutorial. The last Android tutorial I made is still very popular, but I’m going to try and improve on it here.

If you are a beginner to Android and don’t know Java you may prefer my Android tutorial for beginners. I’ll be using Android Studio in this tutorial and I show how to install Android Studio here. All of the code follows the tutorial below.

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Code from the Video

MainActivity.java

package com.newthinktank.helloagain.app;
	 
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
	 
public class MainActivity extends ActionBarActivity {
 
    // onCreate is executed when the activity is created
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
         
    // Sets the file activity_main.xml as the user interface
       setContentView(R.layout.activity_main);

    // To be able to edit the TextView with our code we have to create it and
    // bind it to a TextView object. I need to use final because it will be
    // used in the inner class below
       final TextView firstTextView = (TextView) findViewById(R.id.textView);
 
     // I set up the Button just like I did the TextView
        Button firstButton = (Button) findViewById(R.id.firstButton);

      // This is how you make the Button change the text in the TextView when it is clicked
       firstButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
 
            firstTextView.setText("You Clicked");
	 
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
      // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
       // Handle action bar item clicks here. The action bar will
       // automatically handle clicks on the Home/Up button, so long
       // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

activity_main.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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
   tools:context="com.newthinktank.helloagain.app.MainActivity">

    <TextView
        android:text="@string/hello_world"
        android:textSize="40sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:id="@+id/textView" />
	 
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/button_1_text"
        android:id="@+id/firstButton"
        android:layout_below="@+id/textView"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="52dp" />
 
</RelativeLayout>

dimens.xml

	<resources>
	    <dimen name="activity_horizontal_margin">16dp</dimen>
	    <dimen name="activity_vertical_margin">16dp</dimen>
	</resources>

strings.xml

	<?xml version="1.0" encoding="utf-8"?>
	<resources>
	 
	    <string name="app_name">HelloAgain</string>
	    <string name="hello_world">Hello Again</string>
	    <string name="action_settings">Settings</string>
	    <string name="button_1_text">You Clicked</string>
	 
	</resources>

AndroidManifest.xml

	<?xml version="1.0" encoding="utf-8"?>
	<manifest xmlns:android="http://schemas.android.com/apk/res/android"
	    package="com.newthinktank.helloagain.app" >

	    <application
	        android:allowBackup="true"
	        android:icon="@drawable/ic_launcher"
	        android:label="@string/app_name"
	        android:theme="@style/AppTheme" >
	        <activity

android:name="com.newthinktank.helloagain.app.MainActivity"

	            android:label="@string/app_name" >
	            <intent-filter>
	                <action android:name="android.intent.action.MAIN" />
	 
	                <category android:name="android.intent.category.LAUNCHER" />
	            </intent-filter>
	        </activity>
	    </application>
	 
	</manifest>

Referensi

• http://www.newthinktank.com/2014/06/make-android-apps/
• http://www.newthinktank.com/2014/06/make-android-apps/#sthash.Yhlj67TE.dpuf