[Android]AndroidBucket增加碎片SubLayout功能及AISubLayout的注解支持

以下内容为原创，转载请注明：

来自天天博客：http://www.cnblogs.com/tiantianbyconan/p/3709957.html

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。

相关源码：https://github.com/wangjiegulu/AndroidBucket/tree/master/src/com/wangjie/androidbucket/customviews/sublayout

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-----------------------