如何在android中使用viewGroup

如何在android中使用viewGroup

Answer 1

如前所述，ViewGroup是所有ViewGroups扩展的抽象类，例如LinearLayout就是一个ViewGroup。

MyViewGroup.java：

 public class MyViewGroup extends LinearLayout { public MyViewGroup(Context context) { super(context); } public MyViewGroup(Context context, AttributeSet attrs) { super(context, attrs); } public MyViewGroup(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { super.onLayout(changed, l, t, r, b); Log.e("SWIPED", "onLayout : " + Boolean.toString(changed)); } @Override public boolean onInterceptTouchEvent(MotionEvent event) { super.onInterceptTouchEvent(event); Log.e("SWIPED", "onInterceptTouchEvent : " + event.getAction()); return false; } } 

main.xml中：

 <com.example.MyViewGroup xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/screen" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/tv1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="TEXT ONE" android:padding="20dip" android:background="@android:color/background_dark" /> <TextView android:padding="20dip" android:background="@android:color/background_light" android:id="@+id/tv2" android:layout_height="wrap_content" android:text="TEXT TWO" android:layout_width="fill_parent" /> </com.example.MyViewGroup> 

MainActivity.java：

 public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } }