Optimization of button switching among multiple views at the bottom & lt; instance two 3D switching & gt;

The code structure of multiple view switches at the bottom of the button <instance 2 3D switch> is not reasonable, and it is not conducive to implementing another function planned to be implemented later, let's talk about it first-and through touch screen, you can also implement 3D switching. After consideration, I decided to refactor the code:
1. Separate View operations with the MainViewmanager of a single instance;
2. Implement MVC in the true sense;
3. Continue to manage view addition and deletion using the original index, that is, table-driven;
 
After refactoring, I feel that the code structure is more concise and clear. I hope you can give some suggestions and post the restructured code below:
MainActivity. java:
View plain
Package com. isomobile. widgets;
 
Import android. app. ActivityGroup;
Import android. OS. Bundle;
Import android. view. View;
 
Public class MainActivity extends ActivityGroup implements View. OnClickListener {
Private int mCurId = 0;
Private MainViewManager mViewManager;

/** Called when the activity is first created .*/
@ Override
Public void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. main );
MViewManager = MainViewManager. getInstance ();
MViewManager. setupViews (this );
}
 
@ Override
Public void onClick (View v ){
Final int id = v. getId ();
If (mCurId = id ){
Return;
}
MCurId = id;
MViewManager. processViews (this, id );
MViewManager. onRotateAnimation (mViewManager. getCurButtonIndex (id ));
}
}

MainViewManager. java:
View plain
Package com. isomobile. widgets;
 
Import android. app. Activity;
Import android. app. ActivityGroup;
Import android. content. Context;
Import android. content. Intent;
Import android. view. View;
Import android. view. View. OnClickListener;
Import android. view. animation. Animation;
Import android. widget. Button;
Import android. widget. RelativeLayout;
 
Public class MainViewManager {
Public static String EXTRA_NAME_BUTTON_INDEX = "buton. index ";
 
Public final static Class <?> [] SActivityClasses = {
Activity1.class, Activity2.class, Activity3.class, Activity4.class, Activity5.class
};
 
Public final static int [] sResIds = {
R. id. btn1, R. id. btn2, R. id. btn3, R. id. btn4, R. id. btn5
};
 
Public final static String [] sActivityIds = {
"Activity1", "Activity2", "Activity3", "Activity4", "Activity5"
};
 
Private final static int DISTENCE_X = 240, DISTENCE_Y = 0;
 
Private final static int ROTATE_ANIMATION_DURATION = 300;
 
Private int mPreBtnPos, mCurBtnPos = 0;
 
Private RelativeLayout mViewContainer;
 
Private View mPreView;
 
Private View [] mCurView = new View [sResIds. length];
 
Private Button [] mBtns = new Button [sResIds. length];
 
Private static MainViewManager mInstance = new MainViewManager ();
 
Private MainViewManager (){
}
 
Public static MainViewManager getInstance (){
Return mInstance;
}
 
Public void setupViews (Context context ){
MViewContainer = (RelativeLayout) (Activity) context). findViewById (R. id. container );
Final Button [] btns = mBtns;
For (int I = 0; I <btns. length; I ++ ){
Btns [I] = (Button) (Activity) context). findViewById (sResIds [I]);
Btns [I]. setOnClickListener (OnClickListener) context );
}
 
// The first activity is redirected to the first activity by default.
MCurView [0] = (ActivityGroup) context). getLocalActivityManager (). startActivity (
SActivityIds [0],
New Intent (context, sActivityClasses [0]). addFlags (Intent. FLAG_ACTIVITY_CLEAR_TOP ))
. GetDecorView ();
MViewContainer. addView (mCurView [0]);
MPreView = mCurView [0];
MPreBtnPos = 0;
}
 
Public int getCurButtonIndex (int rid ){
Final int length = sResIds. length;
For (int I = 0; I <length; I ++ ){
If (rid = sResIds [I]) {
Return I;
}
}
Return 0;
}
 
Public void processViews (Context context, int rid ){
MViewContainer. removeAllViews ();
MCurBtnPos = getCurButtonIndex (rid );
Final Intent intent = new Intent (context, sActivityClasses [mCurBtnPos]);
Intent. putExtra (EXTRA_NAME_BUTTON_INDEX, mCurBtnPos );
Intent. addFlags (Intent. FLAG_ACTIVITY_CLEAR_TOP );
MCurView [mCurBtnPos] = (ActivityGroup) context). getLocalActivityManager (). startActivity (
SActivityIds [mCurBtnPos], intent). getDecorView ();
}
 
Public void onRotateAnimation (int index ){
If (mPreBtnPos> mCurBtnPos ){
Rotate3d. rightRotate (mPreView, mCurView [index], DISTENCE_X, DISTENCE_Y,
ROTATE_ANIMATION_DURATION, new AnimListener ());
} Else {
Rotate3d. leftRotate (mPreView, mCurView [index], DISTENCE_X, DISTENCE_Y,
ROTATE_ANIMATION_DURATION, new AnimListener ());
}
 
MPreView = mCurView [index];
MViewContainer. removeAllViews ();
MViewContainer. addView (mCurView [index]);
MPreBtnPos = mCurBtnPos;
}
 
Private final static class AnimListener implements Animation. AnimationListener {
 
Public void onAnimationEnd (Animation animation ){
// You can set the background or status of buttons (whether to click or not)
}
 
Public void onAnimationRepeat (Animation animation ){
 
}
 
Public void onAnimationStart (Animation animation ){
// You can set the background or status of buttons (whether to click or not)
}
}
}

Author: "androidzhaoxiaogang column"