button在底部的多个view切换优化之<实例二3D切换>

在button在底部的多个view切换<实例二3D切换> 代码结构不甚合理，也不利于实现我后面计划实现的另外一个功能，先这里抛砖引玉一下--及通过touch屏幕，也可以实现3D切换。经过考虑之后，决定将代码重构为：

1.将View的操作借助一个单实例的MainViewmanager分离开来；

2.实现真正意义上的MVC；

3.继续使用原来的索引也即表驱动的方式来管理view的添加和删除等；

在重构之后，感觉代码的结构更简洁清晰，希望大家指点批评，下面贴上重构之后的代码：

MainActivity.java:

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:

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);
}

// 第一次启动时，默认跳转到第一个activity
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) {
// 可以设置buttons的背景或者状态(是否可点击等)
}

public void onAnimationRepeat(Animation animation) {

}

public void onAnimationStart(Animation animation) {
// 可以设置buttons的背景或者状态(是否可点击等)
}
}
}

整个工程源代码详见： http://download.csdn.net/detail/androidzhaoxiaogang/3639973