Android Studio: Cara Membuat Android Apps 5 - Revision history

Onnowpurbo at 13:33, 20 April 2015

2015-04-20T13:33:59Z

Onnowpurbo at 13:08, 20 April 2015

2015-04-20T13:08:49Z

Onnowpurbo at 13:05, 20 April 2015

2015-04-20T13:05:09Z

Onnowpurbo at 12:51, 20 April 2015

2015-04-20T12:51:29Z

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Onnowpurbo: New page: In this tutorial I’ll show you how to create multiple Android Activities and then how you’d go about passing data between Android Activities. I also cover Intents. I’ll specifically...

2015-03-18T08:17:02Z

New page: In this tutorial I’ll show you how to create multiple Android Activities and then how you’d go about passing data between Android Activities. I also cover Intents. I’ll specifically...

New page

In this tutorial I’ll show you how to create multiple Android Activities and then how you’d go about passing data between Android Activities. I also cover Intents.

I’ll specifically cover creating multiple Activity layouts, setting up the manifest file, sending data to an Activity when you open it, retrieving data when an Activity closes and what Intents are. All of the code can be found below and it is heavily commented to help you learn.

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Code from the Video

second_layout.xml

01 <?xml version="1.0" encoding="utf-8"?>
02 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
03 android:layout_width="wrap_content"
04 android:layout_height="wrap_content"
05 android:orientation="vertical"
06 android:gravity="left"
07 android:padding="20dp">
08
09 <LinearLayout
10 android:layout_width="wrap_content"
11 android:layout_height="wrap_content"
12 android:orientation="horizontal">
13
14 <TextView
15 android:layout_width="wrap_content"
16 android:layout_height="wrap_content"
17 android:text="@string/enter_name_text_view"/>
18
19 <EditText
20 android:layout_width="185dp"
21 android:layout_height="wrap_content"
22 android:id="@+id/users_name_edit_text"/>
23
24 </LinearLayout>
25
26 <LinearLayout
27 android:layout_width="wrap_content"
28 android:layout_height="wrap_content"
29 android:orientation="horizontal"
30 android:paddingTop="10dp">
31
32 <Button
33 android:layout_width="wrap_content"
34 android:layout_height="wrap_content"
35 android:text="Enter"
36 android:onClick="onSendUsersName"/>
37
38 <TextView
39 android:id="@+id/calling_activity_info_text_view"
40 android:layout_width="wrap_content"
41 android:layout_height="wrap_content"
42 android:text="@string/calling_activity_message"/>
43
44 </LinearLayout>
45
46 </LinearLayout>

activity_main.xml

01 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
02 xmlns:tools="http://schemas.android.com/tools"
03 android:layout_width="match_parent"
04 android:layout_height="match_parent"
05 android:orientation="vertical"
06 android:gravity="center|top"
07 android:padding="20dp"
08 tools:context="com.newthinktank.switchingscreens2.app.MainActivity">
09
10 <TextView
11 android:text="@string/get_the_name_text_view"
12 android:layout_width="wrap_content"
13 android:layout_height="wrap_content"
14 android:textStyle="bold"
15 android:textSize="20sp"/>
16
17 <Button
18 android:layout_width="wrap_content"
19 android:layout_height="wrap_content"
20 android:text="Go Get It"
21 android:layout_marginTop="20dp"
22 android:onClick="onGetNameClick"/>
23
24 <TextView
25 android:text="@string/users_name_sent_back"
26 android:layout_width="wrap_content"
27 android:layout_height="wrap_content"
28 android:textStyle="bold"
29 android:textSize="20sp"
30 android:layout_marginTop="20dp"
31 android:id="@+id/users_name_message"/>
32
33 </LinearLayout>

MainActivity.java

01 package com.newthinktank.switchingscreens2.app;
02
03 import android.content.Intent;
04 import android.support.v7.app.ActionBarActivity;
05 import android.os.Bundle;
06 import android.view.Menu;
07 import android.view.MenuItem;
08 import android.view.View;
09 import android.widget.TextView;
10
11
12 public class MainActivity extends ActionBarActivity {
13
14 @Override
15 protected void onCreate(Bundle savedInstanceState) {
16 super.onCreate(savedInstanceState);
17 setContentView(R.layout.activity_main);
18 }
19
20
21 @Override
22 public boolean onCreateOptionsMenu(Menu menu) {
23 // Inflate the menu; this adds items to the action bar if it is present.
24 getMenuInflater().inflate(R.menu.main, menu);
25 return true;
26 }
27
28 @Override
29 public boolean onOptionsItemSelected(MenuItem item) {
30 // Handle action bar item clicks here. The action bar will
31 // automatically handle clicks on the Home/Up button, so long
32 // as you specify a parent activity in AndroidManifest.xml.
33 int id = item.getItemId();
34 if (id == R.id.action_settings) {
35 return true;
36 }
37 return super.onOptionsItemSelected(item);
38 }
39
40 public void onGetNameClick(View view) {
41
42 // We have to state that are intention is to open another Activity. We do so
43 // by passing a Context and the Activity that we want to open
44
45 Intent getNameScreenIntent = new Intent(this, SecondScreen.class);
46
47 // We ask for the Activity to start and don't expect a result to be sent back
48 // startActivity(getNameScreenIntent);
49
50 // We use startActivityForResult when we expect a result to be sent back
51
52 final int result = 1;
53
54 // To send data use putExtra with a String name followed by its value
55
56 getNameScreenIntent.putExtra("callingActivity", "MainActivity");
57
58 startActivityForResult(getNameScreenIntent, result);
59
60 }
61
62 @Override
63 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
64 super.onActivityResult(requestCode, resultCode, data);
65
66 // Create the TextView so I can put the users name on it
67 TextView usersNameMessage = (TextView) findViewById(R.id.users_name_message);
68
69 // Get the users name from the previous Activity
70 String nameSentBack = data.getStringExtra("UsersName");
71
72 // Add the users name to the end of the textView
73 usersNameMessage.append(" " + nameSentBack);
74
75 }
76 }

SecondScreen.java

01 package com.newthinktank.switchingscreens2.app;
02
03
04 import android.app.Activity;
05 import android.content.Intent;
06 import android.os.Bundle;
07 import android.view.View;
08 import android.widget.EditText;
09 import android.widget.TextView;
10
11 public class SecondScreen extends Activity{
12 @Override
13 protected void onCreate(Bundle savedInstanceState) {
14 super.onCreate(savedInstanceState);
15
16 // Set the layout for the layout we created
17 setContentView(R.layout.second_layout);
18
19 // Get the Intent that called for this Activity to open
20
21 Intent activityThatCalled = getIntent();
22
23 // Get the data that was sent
24
25 String previousActivity = activityThatCalled.getExtras().getString("callingActivity");
26
27 TextView callingActivityMessage = (TextView)
28 findViewById(R.id.calling_activity_info_text_view);
29
30 callingActivityMessage.append(" " + previousActivity);
31 }
32
33 public void onSendUsersName(View view) {
34
35 // Get the users name from the EditText
36 EditText usersNameET = (EditText) findViewById(R.id.users_name_edit_text);
37
38 // Get the name typed into the EditText
39 String usersName = String.valueOf(usersNameET.getText());
40
41 // Define our intention to go back to ActivityMain
42 Intent goingBack = new Intent();
43
44 // Define the String name and the value to assign to it
45 goingBack.putExtra("UsersName", usersName);
46
47 // Sends data back to the parent and can use RESULT_CANCELED, RESULT_OK, or any
48 // custom values starting at RESULT_FIRST_USER. RESULT_CANCELED is sent if
49 // this Activity crashes
50 setResult(RESULT_OK, goingBack);
51
52 // Close this Activity
53 finish();
54
55 }
56 }

AndroidManifest.xml

01 <?xml version="1.0" encoding="utf-8"?>
02 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
03 package="com.newthinktank.switchingscreens2.app" >
04
05 <application
06 android:allowBackup="true"
07 android:icon="@drawable/ic_launcher"
08 android:label="@string/app_name"
09 android:theme="@style/AppTheme" >
10 <activity
11 android:name="com.newthinktank.switchingscreens2.app.MainActivity"
12 android:label="@string/app_name" >
13 <intent-filter>
14 <action android:name="android.intent.action.MAIN" />
15
16 <category android:name="android.intent.category.LAUNCHER" />
17 </intent-filter>
18 </activity>
19
20 
23
24 <activity android:name=".SecondScreen"
25 android:label="Get Name"
26 android:theme="@style/AppTheme"/>
27
28 </application>
29
30 </manifest>
- See more at: http://www.newthinktank.com/2014/06/make-android-apps-5/#sthash.rMWGEHOx.dpuf

==Referensi==

* http://www.newthinktank.com/2014/06/make-android-apps-5/

← Older revision		Revision as of 13:33, 20 April 2015
Line 173:		Line 173:
	SecondScreen.java		SecondScreen.java

−	01 package com.newthinktank.switchingscreens2.app;	+	package com.newthinktank.switchingscreens2.app;
−	02	+
−	03	+
−	04 import android.app.Activity;	+	import android.app.Activity;
−	05 import android.content.Intent;	+	import android.content.Intent;
−	06 import android.os.Bundle;	+	import android.os.Bundle;
−	07 import android.view.View;	+	import android.view.View;
−	08 import android.widget.EditText;	+	import android.widget.EditText;
−	09 import android.widget.TextView;	+	import android.widget.TextView;
−	10	+
−	11 public class SecondScreen extends Activity{	+	public class SecondScreen extends Activity{
−	12 @Override	+	@Override
−	13 protected void onCreate(Bundle savedInstanceState) {	+	protected void onCreate(Bundle savedInstanceState) {
−	14 super.onCreate(savedInstanceState);	+	super.onCreate(savedInstanceState);
−	15	+
−	16 // Set the layout for the layout we created	+	// Set the layout for the layout we created
−	17 setContentView(R.layout.second_layout);	+	setContentView(R.layout.second_layout);
−	18	+
−	19 // Get the Intent that called for this Activity to open	+	// Get the Intent that called for this Activity to open
−	20	+
−	21 Intent activityThatCalled = getIntent();	+	Intent activityThatCalled = getIntent();
−	22	+
−	23 // Get the data that was sent	+	// Get the data that was sent
−	24	+
−	25 String previousActivity = activityThatCalled.getExtras().getString("callingActivity");	+	String previousActivity = activityThatCalled.getExtras().getString("callingActivity");
−	26	+
−	27 TextView callingActivityMessage = (TextView)	+	TextView callingActivityMessage = (TextView)
−	28 findViewById(R.id.calling_activity_info_text_view);	+	findViewById(R.id.calling_activity_info_text_view);
−	29	+
−	30 callingActivityMessage.append(" " + previousActivity);	+	callingActivityMessage.append(" " + previousActivity);
−	31 }	+	}
−	32	+
−	33 public void onSendUsersName(View view) {	+	public void onSendUsersName(View view) {
−	34	+
−	35 // Get the users name from the EditText	+	// Get the users name from the EditText
−	36 EditText usersNameET = (EditText) findViewById(R.id.users_name_edit_text);	+	EditText usersNameET = (EditText) findViewById(R.id.users_name_edit_text);
−	37	+
−	38 // Get the name typed into the EditText	+	// Get the name typed into the EditText
−	39 String usersName = String.valueOf(usersNameET.getText());	+	String usersName = String.valueOf(usersNameET.getText());
−	40	+
−	41 // Define our intention to go back to ActivityMain	+	// Define our intention to go back to ActivityMain
−	42 Intent goingBack = new Intent();	+	Intent goingBack = new Intent();
−	43	+
−	44 // Define the String name and the value to assign to it	+	// Define the String name and the value to assign to it
−	45 goingBack.putExtra("UsersName", usersName);	+	goingBack.putExtra("UsersName", usersName);
−	46	+
−	47 // Sends data back to the parent and can use RESULT_CANCELED, RESULT_OK, or any	+	// Sends data back to the parent and can use RESULT_CANCELED, RESULT_OK, or any
−	48 // custom values starting at RESULT_FIRST_USER. RESULT_CANCELED is sent if	+	// custom values starting at RESULT_FIRST_USER. RESULT_CANCELED is sent if
−	49 // this Activity crashes	+	// this Activity crashes
−	50 setResult(RESULT_OK, goingBack);	+	setResult(RESULT_OK, goingBack);
−	51	+
−	52 // Close this Activity	+	// Close this Activity
−	53 finish();	+	finish();
−	54	+
−	55 }	+	}
−	56 }	+	}

	AndroidManifest.xml		AndroidManifest.xml

← Older revision		Revision as of 13:08, 20 April 2015
Line 148:		Line 148:

	// To send data use putExtra with a String name followed by its value		// To send data use putExtra with a String name followed by its value
−	55	+
−	56 getNameScreenIntent.putExtra("callingActivity", "MainActivity");	+	getNameScreenIntent.putExtra("callingActivity", "MainActivity");
−	57	+
−	58 startActivityForResult(getNameScreenIntent, result);	+	startActivityForResult(getNameScreenIntent, result);
−	59	+
−	60 }	+	}
−	61	+
−	62 @Override	+	@Override
−	63 protected void onActivityResult(int requestCode, int resultCode, Intent data) {	+	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
−	64 super.onActivityResult(requestCode, resultCode, data);	+	super.onActivityResult(requestCode, resultCode, data);
−	65	+
−	66 // Create the TextView so I can put the users name on it	+	// Create the TextView so I can put the users name on it
−	67 TextView usersNameMessage = (TextView) findViewById(R.id.users_name_message);	+	TextView usersNameMessage = (TextView) findViewById(R.id.users_name_message);
−	68	+
−	69 // Get the users name from the previous Activity	+	// Get the users name from the previous Activity
−	70 String nameSentBack = data.getStringExtra("UsersName");	+	String nameSentBack = data.getStringExtra("UsersName");
−	71	+
−	72 // Add the users name to the end of the textView	+	// Add the users name to the end of the textView
−	73 usersNameMessage.append(" " + nameSentBack);	+	usersNameMessage.append(" " + nameSentBack);
−	74	+
−	75 }	+	}
−	76 }	+	}

	SecondScreen.java		SecondScreen.java
Line 232:		Line 232:
	AndroidManifest.xml		AndroidManifest.xml

−	01 <?xml version="1.0" encoding="utf-8"?>	+	<?xml version="1.0" encoding="utf-8"?>
−	02 <manifest xmlns:android="http://schemas.android.com/apk/res/android"	+	<manifest xmlns:android="http://schemas.android.com/apk/res/android"
−	03 package="com.newthinktank.switchingscreens2.app" >	+	package="com.newthinktank.switchingscreens2.app" >
−	04	+
−	05 <application	+	<application
−	06 android:allowBackup="true"	+	android:allowBackup="true"
−	07 android:icon="@drawable/ic_launcher"	+	android:icon="@drawable/ic_launcher"
−	08 android:label="@string/app_name"	+	android:label="@string/app_name"
−	09 android:theme="@style/AppTheme" >	+	android:theme="@style/AppTheme" >
−	10 <activity	+	<activity
−	11 android:name="com.newthinktank.switchingscreens2.app.MainActivity"	+	android:name="com.newthinktank.switchingscreens2.app.MainActivity"
−	12 android:label="@string/app_name" >	+	android:label="@string/app_name" >
−	13 <intent-filter>	+	<intent-filter>
−	14 <action android:name="android.intent.action.MAIN" />	+	<action android:name="android.intent.action.MAIN" />
−	15	+
−	16 <category android:name="android.intent.category.LAUNCHER" />	+	<category android:name="android.intent.category.LAUNCHER" />
−	17 </intent-filter>	+	</intent-filter>
−	18 </activity>	+	</activity>
−	19	+
−	20 <!-- name defines the class that handles setting up the Activity	+	<!-- name defines the class that handles setting up the Activity
−	21 label will be the title for the activity	+	label will be the title for the activity
−	22 theme defines the theme to use -->	+	theme defines the theme to use -->
−	23	+
−	24 <activity android:name=".SecondScreen"	+	<activity android:name=".SecondScreen"
−	25 android:label="Get Name"	+	android:label="Get Name"
−	26 android:theme="@style/AppTheme"/>	+	android:theme="@style/AppTheme"/>
−	27	+
−	28 </application>	+	</application>
−	29	+
−	30 </manifest>	+	</manifest>

← Older revision		Revision as of 13:05, 20 April 2015
Line 106:		Line 106:

	public class MainActivity extends ActionBarActivity {		public class MainActivity extends ActionBarActivity {
−	13	+
−	14 @Override	+	@Override
−	15 protected void onCreate(Bundle savedInstanceState) {	+	protected void onCreate(Bundle savedInstanceState) {
−	16 super.onCreate(savedInstanceState);	+	super.onCreate(savedInstanceState);
−	17 setContentView(R.layout.activity_main);	+	setContentView(R.layout.activity_main);
−	18 }	+	}
−	19	+
−	20	+
−	21 @Override	+	@Override
−	22 public boolean onCreateOptionsMenu(Menu menu) {	+	public boolean onCreateOptionsMenu(Menu menu) {
−	23 // Inflate the menu; this adds items to the action bar if it is present.	+	// Inflate the menu; this adds items to the action bar if it is present.
−	24 getMenuInflater().inflate(R.menu.main, menu);	+	getMenuInflater().inflate(R.menu.main, menu);
−	25 return true;	+	return true;
−	26 }	+	}
−	27	+
−	28 @Override	+	@Override
−	29 public boolean onOptionsItemSelected(MenuItem item) {	+	public boolean onOptionsItemSelected(MenuItem item) {
−	30 // Handle action bar item clicks here. The action bar will	+	// Handle action bar item clicks here. The action bar will
−	31 // automatically handle clicks on the Home/Up button, so long	+	// automatically handle clicks on the Home/Up button, so long
−	32 // as you specify a parent activity in AndroidManifest.xml.	+	// as you specify a parent activity in AndroidManifest.xml.
−	33 int id = item.getItemId();	+	int id = item.getItemId();
−	34 if (id == R.id.action_settings) {	+	if (id == R.id.action_settings) {
−	35 return true;	+	return true;
−	36 }	+	}
−	37 return super.onOptionsItemSelected(item);	+	return super.onOptionsItemSelected(item);
−	38 }	+	}
−	39	+
−	40 public void onGetNameClick(View view) {	+	public void onGetNameClick(View view) {
−	41	+
−	42 // We have to state that are intention is to open another Activity. We do so	+	// We have to state that are intention is to open another Activity. We do so
−	43 // by passing a Context and the Activity that we want to open	+	// by passing a Context and the Activity that we want to open
−	44	+
−	45 Intent getNameScreenIntent = new Intent(this, SecondScreen.class);	+	Intent getNameScreenIntent = new Intent(this, SecondScreen.class);
−	46	+
−	47 // We ask for the Activity to start and don't expect a result to be sent back	+	// We ask for the Activity to start and don't expect a result to be sent back
−	48 // startActivity(getNameScreenIntent);	+	// startActivity(getNameScreenIntent);
−	49	+
−	50 // We use startActivityForResult when we expect a result to be sent back	+	// We use startActivityForResult when we expect a result to be sent back
−	51	+
−	52 final int result = 1;	+	final int result = 1;
−	53	+
−	54 // To send data use putExtra with a String name followed by its value	+	// To send data use putExtra with a String name followed by its value
	55		55
	56 getNameScreenIntent.putExtra("callingActivity", "MainActivity");		56 getNameScreenIntent.putExtra("callingActivity", "MainActivity");