. , ( ).
Project : app Gradle Scripts. app - , .. , .
app : manifests, java res. .
manifest. manifest AndroidManifest.xml. Gradle. - , , - . , 2- , 1- , . - , . AndroidManifest.xml Android-.
java. - . . MainActivity.
res. res , : drawable, layout, menu, values. .
- drawable , , .. , ..
- layout xml- , ( , , ..). activity_main.xml, .
- menu - xml-, . main.xml, menu.
- value - , : , , , , .
, . , .1.11. (Palette) (.1.12).
.1.11. .1.12. Palette
Palette , , , , . Design Text.
Design . .
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Text . , . , .
AndroidManifest.xml
. (.1.13):
.1.13. AndroidManifest.xml
XML, .
<manifest>. :
xmlns:android Android,
package .
:
android:versionCode .
android:versionName .
<manifest> <application>. . (<activity>, <service>, <receiver>, <provider> ), . , , . . , , . Android:
android:allowBackup - ,
android:icon ,
android:label .
<application> <activity>, (), .
activity_main.xml
activity_main.xml . - Design Text. Text - . (.1.14):
.1.14. activity_main.xml
XML, .
<RelativeLayout>. :
xmlns:android Android,
xmlns:tools - ,
android:layout_width=match_parent - (match_parent - ),
android:layout_ height =match_parent - ,
android:paddingLeft =16dp ,
android:paddingRight =16dp ,
android:paddingTop =16dp ,
android:paddingBottom =16dp ,
android:paddingLeft =16dp ,
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MainActivity.java
, Java, .
:
package com.example.misis.myapplication;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
//Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
. .
public class MainActivity.
, . , Hellow World! , , TextView "Hellow World!" ( "Hellow World!" ) , Text , , ( , ):
< TextView
android:text="@string/hello_world"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="183dp"
android:textSize="25pt"/>
Preview .
! APK , , . , ( , ) Run, Run --- Run "app", Shift + F10. / . , Android !
. activity_main.xml. - Design Text.
Text.
<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=".MainActivity">
<TextView
android:text="@string/hello_world"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
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</RelativeLayout>
, android:text="@string/hello_world" android:text="Hello World!". , Hello World!, . , , , . , , , 16dp. .. , , @string/hello_world. Ctrl + - () .
XML-. RelativeLayout, TextView, . , hello_world. res/values/strings.xml.
Java- (MainActivity.java)
package ru.alexanderklimov.helloworld;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@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);
}
}
, MainActivity java ( Java). - (Package Name). . . . , ( Unused import statement) .
, (extends) Activity. . , ActionBarActivity, . , Android 4.1. , Android 4, , Android . ActionBarActivity . Activity. , . . , .
onCreate() , . .
super.onCreate(savedInstanceState); , . , .
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setContentView(R.layout.activity_main); . setContentView(int) . res/layout. activity_main.xml. cat.xml . :
setContentView(R.layout.cat);
, . . , Settings.
