BoxDrawingView.java
package com.example.aster.draganddraw;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
public class BoxDrawingView extends View {
public BoxDrawingView (Context context) {
this (context, null );
}
public BoxDrawingView (Context context, AttributeSet attrs) {
super (context, attrs);
}
}
DragAndDrawActivity.java
package com.example.aster.draganddraw;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class DragAndDrawActivity extends SingleFragmentActivity {
@Override
public Fragment createFragment () {
return DragAndDrawFragment.newInstance();
}
}
DragAndDrawFragment.java
package com.example.aster.draganddraw;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class DragAndDrawFragment extends Fragment {
public static DragAndDrawFragment newInstance () {
return new DragAndDrawFragment();
}
@Override
public View onCreateView (LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_drag_and_draw, container, false );
return v;
}
}
SingleFragmentActivity.java
package com.example.aster.draganddraw;
import android.os.Bundle;
import android.support.annotation.LayoutRes;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
public abstract class SingleFragmentActivity extends AppCompatActivity {
protected abstract Fragment createFragment ();
@LayoutRes
protected int getLayoutResId () {
return R.layout.activity_fragment;
}
@Override
protected void onCreate (Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(getLayoutResId());
FragmentManager fm = getSupportFragmentManager();
Fragment fragment = fm.findFragmentById(R.id.fragment_container);
if (fragment == null ) {
fragment = createFragment();
fm.beginTransaction().add(R.id.fragment_container, fragment).commit();
}
}
}
activity_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android ="http://schemas.android.com/apk/res/android"
android:id ="@+id/fragment_container"
android:layout_width ="match_parent"
android:layout_height ="match_parent" />
fragment_drag_and_draw.xml
<?xml version="1.0" encoding="utf-8"?>
<com.example.aster.draganddraw.BoxDrawingView
xmlns:android ="http://schemas.android.com/apk/res/android"
android:layout_width ="match_parent"
android:layout_height ="match_parent" />