基本的な処理の流れ

1.AndroidManifest.xml

▼C:/Users/Administrator/AndroidStudioProjects/MyApp01/app/src/main/AndroidManifest.xml
・最初に、「android.intent.action.MAIN」を読込

<action android:name="android.intent.action.MAIN" />

・次に、そこで指定されたアクティビティを読込

 android:name="net.e1blue.android0.myapp01.MyActivity"

---

2.MyActivity.java

▼C:/Users/Administrator/AndroidStudioProjects/MyApp01/app/src/main/java/net/e1blue/android0/myapp01/MyActivity.java
・MyActivity.java読込
・最初にonCreateメソッド読込
・R.layoutで指定された「activity_my」読込

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_my);

    }

---

3.activity_my.xml

▼C:/Users/Administrator/AndroidStudioProjects/MyApp01/app/src/main/res/layout/activity_my.xml
・activity_my.xml読込