로딩페이지(Loading) 만들기(1)

로딩액티비티(Loading) 

- Intent와 postDelayed를 사용한다

- splash라고 많이 부른다.

- 보통 이미지 한장을 많이 쓴다.

1)  기본 MainActivity 생성

public class MainActivity extends Activity
{

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

2)  LoadingActivity생성(복붙한후에 이름만 바꿔준다)

public class LoadingActivity extends Activity
{

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

3)  activity_main.xml

<LinearLayout
    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:orientation="vertical"
    android:gravity="center"
    tools:context=".MainActivity">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Main Activity"
            android:textColor="#000000"
            android:textSize="30sp"/>

</LinearLayout>

4)  activity_loading.xml

<LinearLayout
    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:orientation="vertical"
    android:gravity="center"
    tools:context=".LoadingActivity">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Loading Activity"
            android:textColor="#000000"
            android:textSize="30sp"/>

</LinearLayout>

5)  LoadingActivity에서 postDelayed로 딜레이를 넣고 인텐트로 액티비티 전환을 한다

public class LoadingActivity extends Activity
{
    Intent intent;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_loading);
        loading();
    }

    private void loading()
    {
        Handler mHandler = new Handler();
        mHandler.postDelayed(new Runnable()
        {
            @Override
            public void run()
            {
                intent = new Intent(getApplicationContext(), MainActivity.class);
                startActivity(intent);
            }
        }, 3000);
    }
}

6) Manifest.xml에서 위에 있는 <activity> ~ </activity> 대충 복붙해서 붙인다음 name만 바꿔준다.

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

    <activity
        android:name=".LoadingActivity"
        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=".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>