[Android]AndroidBucket增加碎片SubLayout功能及AISubLayout的注解支持
之前写过一篇博客，是使用Fragment来实现TabHost的效果，并且模拟TabHost的切换各个fragment生命周期的调用，见http://www.cnblogs.com/tiantianbyconan/p/3360938.html
但是如果要实现的效果是两级的Tab，比如在第一级tab中又有三个子Tab切换不同的布局，
相当于在Fragment中嵌套来Fragment，这个怎么实现？
也有个官方的实现方法，通过使用android-support-v13.jar包中的getChildFragmentManager方法来获取一个Manager。
这里带来我写的一个新的方案，使用SubLayout来实现。
下面使用一个例子来说下使用方法，先看下最后的效果（项目使用了我的开源AndroidBucket和AndroidInject 请先添加依赖项目，欢迎star／fork）：
效果跟以前的例子大同小异，点击第一个tab上的TextView，然后Toast提示EditText上的信息，但是使用方式却是不一样的。
大体的思路是在MainActivity布局中增加一个FrameLayout，然后在切换过程中不停的用相应的布局去替换FrameLayout中。
main.xml布局如下：
1 <?xml version=”1.0” encoding=”utf-8”?>
2 <LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android“
3 android:orientation=”vertical”
4 android:layout_width=”fill_parent”
5 android:layout_height=”fill_parent”
6 >
7
8 <FrameLayout
9 android:id=”@+id/main_content_view”
10 android:layout_width=”match_parent”
11 android:layout_height=”0dp”
12 android:layout_weight=”1.0”
13 />
14
15 <RadioGroup
16 android:id=”@+id/main_tabs_rg”
17 android:layout_width=”fill_parent”
18 android:layout_height=”65dp”
19 android:background=”#aabbcc”
20 android:gravity=”center_vertical”
21 android:orientation=”horizontal” >
22
23 <RadioButton
24 android:id=”@+id/main_tab_a_rb”
25 style=”@style/tab_item_background”
26 android:drawableTop=”@drawable/ic_launcher”
27 android:paddingTop=”7dp”
28 android:textSize=”13sp”
29 android:checked=”true”
30 />
31
32 <RadioButton
33 android:id=”@+id/main_tab_b_rb”
34 style=”@style/tab_item_background”
35 android:drawableTop=”@drawable/ic_launcher”
36 android:paddingTop=”7dp”
37 android:textSize=”13sp”
38 />
39
40 <RadioButton
41 android:id=”@+id/main_tab_c_rb”
42 style=”@style/tab_item_background”
43 android:drawableTop=”@drawable/ic_launcher”
44 android:paddingTop=”7dp”
45 android:textSize=”13sp”
46 />
47
48 </RadioGroup>
49
50 </LinearLayout>
布局很简单，一个FrameLayout用于存放不同界面的布局，3个RadioButton表示下面的每一项Tab按钮。
在MainActivity中代码如下：
@AILayout(R.layout.main)
public class MainActivity extends AIActivity {
public static final String TAG = MainActivity.class.getSimpleName();
@AIView(R.id.main_content_view)
ViewGroup contentView;
@AIView(R.id.main_tabs_rg)
RadioGroup rg;
SubLayoutManager sbManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
sbManager = new SubLayoutManager<SubLayout>(context, contentView, TabASubLayout.class, TabBSubLayout.class, TabCSubLayout.class);
sbManager.setSwitchListener(new SubLayoutManager.LayoutSwitchListener<SubLayout>() {
@Override
public void switchSelf(SubLayout subLayout, int position) {
Logger.d(TAG, “[switch listener]switchSelf, subLayout: “ + subLayout + “, position: “ + position);
}
@Override
public void switchCompleted(SubLayout subLayout, int position) {
Logger.d(TAG, “[switch listener]switchCompleted, subLayout: “ + subLayout + “, position: “ + position);
}
});
rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
int index = -1;
switch(i){
case R.id.main_tab_a_rb:
index = 0;
break;
case R.id.main_tab_b_rb:
index = 1;
break;
case R.id.main_tab_c_rb:
index = 2;
break;
}
if(index < 0 || index >= sbManager.getSubLayoutSize()){
return;
}
sbManager.switchLayout(index);
}
});
sbManager.switchLayout(0); // 默认切换第一页
}
@Override
protected void onDestroy() {
super.onDestroy();
sbManager.destoryClear();
sbManager = null;
}
}
上面的SubLayout相当于一个Fragment，SubLayoutManager用于管理多个SubLayout之间的切换。SubLayoutManager可以通过new获取。
其中构造方法中：
public SubLayoutManager(Context context, ViewGroup contentView, Class<? extends T>… slszzs) {
参数二：contentView表示在MainActivity中预留给SubLayout显示的FrameLayout。
参数三：是个可变长参数，可以在后面（有序）追加所有需要切换的SubLayout的Class对象。
第一次初始化后各个SubLayout对象不会马上生成，只会在切换到改页面时才会生成该对象，会执行SubLayout的initLayout()方法，这个方法只会调用一次（类似onCreate()方法）
需要切换页面时只需要执行SubLayoutManager的switchLayout()方法，传入SubLayout的position就可以了，这个position跟参数三的顺序一致。
接下来看下几个SubLayout是怎么去实现的，因为三个SubLayout大致相同，所以只分析一个就可以了：
TabASubLayout代码如下：
1 @AILayout(R.layout.tab_a)
2 public class TabASubLayout extends AISubLayout {
3 public static final String TAG = TabASubLayout.class.getSimpleName();
4
5
6 // @AIView(R.id.tab_a_tv)
7 // TextView tv;
8 @AIView(R.id.tab_a_et)
9 EditText et;
10
11 public TabASubLayout(Context context) {
12 super(context);
13 // setContentView(R.layout.tab_a);
14
15 }
16
17 @Override
18 public void initLayout() {
19 super.initLayout();
20 Logger.d(TAG, “initLayout…”);
21 }
22
23 @AIClick({R.id.tab_a_tv})
24 public void onClickCallbackSample(View view) {
25 Toast.makeText(context, “clicked: “ + ((TextView)view).getText() + “, “ + et.getText(), Toast.LENGTH_SHORT).show();
26 }
27
28 @Override
29 public void onResume() {
30 super.onResume();
31 Logger.d(TAG, “onResume…”);
32 }
33
34 @Override
35 public void onPause() {
36 super.onPause();
37 Logger.d(TAG, “onPause…”);
38 }
39
40 }
代码很简单，继承AISubLayout即可，AISubLayout是AndroidInject中AndroidBucket的子类，实现了SubLayout的注解的支持。当然你也可以直接继承SubLayout，这样的话就不能使用注解了，看上面的被注释的代码，可以通过setContentView来设置对应的布局，可以通过findViewById来获取控件对象。
它也有onResume和onPause方法，当前页A被切换到B的话会调用A的onPause，然后调用B的onResume（如果之前B没有被初始化过，则先调用initLayout再调用onResume方法）
下面来看看log打印的日志：
// 以下为启动应用，默认加载TabA
05-05 08:22:32.216 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ —–switch start———————–
05-05 08:22:32.216 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ switch before………: [DelayObj{clazz=class com.wangjie.sublayouttest.TabASubLayout, delayObj=null}, DelayObj{clazz=class com.wangjie.sublayouttest.TabBSubLayout, delayObj=null}, DelayObj{clazz=class com.wangjie.sublayouttest.TabCSubLayout, delayObj=null}]
05-05 08:22:32.336 1086-1086/com.wangjie.sublayouttest D/TabASubLayout﹕ initLayout…
05-05 08:22:32.336 1086-1086/com.wangjie.sublayouttest D/TabASubLayout﹕ onResume…
05-05 08:22:32.336 1086-1086/com.wangjie.sublayouttest D/MainActivity﹕ [switch listener]switchCompleted, subLayout: com.wangjie.sublayouttest.TabASubLayout@b4dff088, position: 0
05-05 08:22:32.336 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ switch after………: [DelayObj{clazz=class com.wangjie.sublayouttest.TabASubLayout, delayObj=com.wangjie.sublayouttest.TabASubLayout@b4dff088}, DelayObj{clazz=class com.wangjie.sublayouttest.TabBSubLayout, delayObj=null}, DelayObj{clazz=class com.wangjie.sublayouttest.TabCSubLayout, delayObj=null}]
05-05 08:22:32.336 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ —–switch end———————–
// TabA切换到TabB
05-05 08:22:37.926 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ —–switch start———————–
05-05 08:22:37.926 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ switch before………: [DelayObj{clazz=class com.wangjie.sublayouttest.TabASubLayout, delayObj=com.wangjie.sublayouttest.TabASubLayout@b4dff088}, DelayObj{clazz=class com.wangjie.sublayouttest.TabBSubLayout, delayObj=null}, DelayObj{clazz=class com.wangjie.sublayouttest.TabCSubLayout, delayObj=null}]
05-05 08:22:37.946 1086-1086/com.wangjie.sublayouttest D/TabASubLayout﹕ onPause…
05-05 08:22:37.986 1086-1086/com.wangjie.sublayouttest D/TabBSubLayout﹕ initLayout…
05-05 08:22:37.996 1086-1086/com.wangjie.sublayouttest D/TabBSubLayout﹕ onResume…
05-05 08:22:37.996 1086-1086/com.wangjie.sublayouttest D/MainActivity﹕ [switch listener]switchCompleted, subLayout: com.wangjie.sublayouttest.TabBSubLayout@b4de1d80, position: 1
05-05 08:22:37.996 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ switch after………: [DelayObj{clazz=class com.wangjie.sublayouttest.TabASubLayout, delayObj=com.wangjie.sublayouttest.TabASubLayout@b4dff088}, DelayObj{clazz=class com.wangjie.sublayouttest.TabBSubLayout, delayObj=com.wangjie.sublayouttest.TabBSubLayout@b4de1d80}, DelayObj{clazz=class com.wangjie.sublayouttest.TabCSubLayout, delayObj=null}]
05-05 08:22:37.996 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ —–switch end———————–
// TabB切换到TabC
05-05 08:22:41.486 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ —–switch start———————–
05-05 08:22:41.486 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ switch before………: [DelayObj{clazz=class com.wangjie.sublayouttest.TabASubLayout, delayObj=com.wangjie.sublayouttest.TabASubLayout@b4dff088}, DelayObj{clazz=class com.wangjie.sublayouttest.TabBSubLayout, delayObj=com.wangjie.sublayouttest.TabBSubLayout@b4de1d80}, DelayObj{clazz=class com.wangjie.sublayouttest.TabCSubLayout, delayObj=null}]
05-05 08:22:41.496 1086-1086/com.wangjie.sublayouttest D/TabBSubLayout﹕ onPause…
05-05 08:22:41.516 1086-1086/com.wangjie.sublayouttest D/TabCSubLayout﹕ initLayout…
05-05 08:22:41.516 1086-1086/com.wangjie.sublayouttest D/TabCSubLayout﹕ onResume…
05-05 08:22:41.516 1086-1086/com.wangjie.sublayouttest D/MainActivity﹕ [switch listener]switchCompleted, subLayout: com.wangjie.sublayouttest.TabCSubLayout@b4e17840, position: 2
05-05 08:22:41.516 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ switch after………: [DelayObj{clazz=class com.wangjie.sublayouttest.TabASubLayout, delayObj=com.wangjie.sublayouttest.TabASubLayout@b4dff088}, DelayObj{clazz=class com.wangjie.sublayouttest.TabBSubLayout, delayObj=com.wangjie.sublayouttest.TabBSubLayout@b4de1d80}, DelayObj{clazz=class com.wangjie.sublayouttest.TabCSubLayout, delayObj=com.wangjie.sublayouttest.TabCSubLayout@b4e17840}]
05-05 08:22:41.526 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ —–switch end———————–
_// TabC切换到TabA
05-05 08:22:44.086 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ —–switch start———————–
05-05 08:22:44.086 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ switch before………: [DelayObj{clazz=class com.wangjie.sublayouttest.TabASubLayout, delayObj=com.wangjie.sublayouttest.TabASubLayout@b4dff088}, DelayObj{clazz=class com.wangjie.sublayouttest.TabBSubLayout, delayObj=com.wangjie.sublayouttest.TabBSubLayout@b4de1d80}, DelayObj{clazz=class com.wangjie.sublayouttest.TabCSubLayout, delayObj=com.wangjie.sublayouttest.TabCSubLayout@b4e17840}]
05-05 08:22:44.086 1086-1086/com.wangjie.sublayouttest D/TabCSubLayout﹕ onPause…
05-05 08:22:44.136 1086-1086/com.wangjie.sublayouttest D/TabASubLayout﹕ onResume…
05-05 08:22:44.136 1086-1086/com.wangjie.sublayouttest D/MainActivity﹕ [switch listener]switchCompleted, subLayout: com.wangjie.sublayouttest.TabASubLayout@b4dff088, position: 0
05-05 08:22:44.136 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ switch after………: [DelayObj{clazz=class com.wangjie.sublayouttest.TabASubLayout, delayObj=com.wangjie.sublayouttest.TabASubLayout@b4dff088}, DelayObj{clazz=class com.wangjie.sublayouttest.TabBSubLayout, delayObj=com.wangjie.sublayouttest.TabBSubLayout@b4de1d80}, DelayObj{clazz=class com.wangjie.sublayouttest.TabCSubLayout, delayObj=com.wangjie.sublayouttest.TabCSubLayout@b4e17840}]
05-05 08:22:44.136 1086-1086/com.wangjie.sublayouttest D/SubLayoutManager﹕ —–switch end———————–
_
本文链接：https://blog.wangjiegulu.com/2014/05/05/Android-AndroidBucket增加碎片SubLayout功能及AISubLayout的注解支持/
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