[android] 切换界面的问题详解手机开发

    /** 
     * 初始化主体 
     */ 
    public void initMiddle() { 
        mainContainer=(RelativeLayout) findViewById(R.id.il_main); 
        MiddleManager.getInstance().setMainContainer(mainContainer); 
        MiddleManager.getInstance().loadView(LoginView.class); 
    }

package com.tsh.lottery.views; 
 
import java.lang.reflect.Constructor; 
import java.util.HashMap; 
import java.util.Map; 
 
import android.content.Context; 
import android.view.View; 
import android.view.animation.AnimationUtils; 
import android.widget.RelativeLayout; 
 
import com.tsh.lottery.R; 
 
public class MiddleManager { 
    private RelativeLayout mainContainer; 
    //单例 
    private static MiddleManager manager=new MiddleManager(); 
    private MiddleManager(){}; 
    public static MiddleManager getInstance(){ 
        return manager; 
    } 
    public void setMainContainer(RelativeLayout mainContainer) { 
        this.mainContainer = mainContainer; 
    } 
    //界面缓存 
    private Map<String,BaseView> VIEWCACHE=new HashMap<String,BaseView>(); 
    //当前界面 
    private BaseView currentView; 
    /** 
     * 加载界面 
     */ 
    public void loadView(Class<? extends BaseView> baseViewClass) { 
         
        BaseView baseView=null; 
        //判断是否存在 
        String key=baseViewClass.getSimpleName(); 
        if(VIEWCACHE.containsKey(key)){ 
            baseView=VIEWCACHE.get(key); 
        }else{ 
            try { 
                Constructor<? extends BaseView> constructor; 
                constructor = baseViewClass.getConstructor(Context.class); 
                baseView=constructor.newInstance(mainContainer.getContext()); 
            } catch (Exception e) { 
                e.printStackTrace(); 
            } 
            VIEWCACHE.put(key, baseView); 
        } 
        mainContainer.removeAllViews(); 
//        if(currentView!=null){ 
//            SlideUtil.slideOut(currentView.getView(), 2000); 
//        } 
         
        View child=baseView.getView(); 
        mainContainer.addView(child); 
        //SlideUtil.slideIn(child, 2000); 
        child.startAnimation(AnimationUtils.loadAnimation(mainContainer.getContext(), R.anim.left_to_right)); 
        currentView=baseView; 
    } 
}

package com.tsh.lottery.views; 
 
import android.content.Context; 
import android.util.AttributeSet; 
import android.view.View; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.TextView; 
/** 
 * 会员界面 
 * @author taoshihan 
 * 
 */ 
public class IndexView extends BaseView{ 
    private TextView textView; 
    /** 
     * 构造函数 
     * 经过之前的处理，这个构造函数只会执行一次 
     * @param context 
     */ 
    public IndexView(Context context) { 
        super(context); 
        initView(); 
    } 
    /** 
     * 初始化界面 
     */ 
    private void initView() { 
        textView=new TextView(context); 
        LayoutParams params=new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT); 
        textView.setLayoutParams(params); 
        textView.setText("我是会员界面"); 
    } 
    @Override 
    public View getView() { 
        return textView; 
    } 
}