如何在android中使用viewGroup
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时间：2020-08-20 03:00:29 来源:igfitidea点击:
How to use viewGroup in android
提问by
How to use viewGroup in android
如何在android中使用viewGroup
回答by worked
As mentioned, ViewGroup is an abstract class that all ViewGroups extend, LinearLayout for instance is a ViewGroup.
如前所述，ViewGroup 是所有 ViewGroup 扩展的抽象类，例如 LinearLayout 是一个 ViewGroup。
MyViewGroup.java:
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:
主要.XML：
<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:
主活动.java：
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
