FinalActivity.java

/**
 * Copyright (c) 2012-2013, Michael Yang 杨福海 (www.yangfuhai.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.tsz.afinal;

import java.lang.reflect.Field;

import net.tsz.afinal.annotation.view.EventListener;
import net.tsz.afinal.annotation.view.Select;
import net.tsz.afinal.annotation.view.ViewInject;
import android.app.Activity;
import android.text.TextUtils;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.AbsListView;

public abstract class FinalActivity extends Activity {


	public void setContentView(int layoutResID) {
		super.setContentView(layoutResID);
		initView();
	}


	public void setContentView(View view, LayoutParams params) {
		super.setContentView(view, params);
		initView();
	}


	public void setContentView(View view) {
		super.setContentView(view);
		initView();
	}

	private void initView(){
		Field[] fields = getClass().getDeclaredFields();
		if(fields!=null && fields.length>0){
			for(Field field : fields){
				try {
					field.setAccessible(true);
					
					if(field.get(this)!= null )
						continue;
				
					ViewInject viewInject = field.getAnnotation(ViewInject.class);
					if(viewInject!=null){
						
						int viewId = viewInject.id();
					    field.set(this,findViewById(viewId));
					
						setListener(field,viewInject.click(),Method.Click);
						setListener(field,viewInject.longClick(),Method.LongClick);
						setListener(field,viewInject.itemClick(),Method.ItemClick);
						setListener(field,viewInject.itemLongClick(),Method.itemLongClick);
						
						Select select = viewInject.select();
						if(!TextUtils.isEmpty(select.selected())){
							setViewSelectListener(field,select.selected(),select.noSelected());
						}
						
					}
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}
	}
	
	
	
	private void setViewSelectListener(Field field,String select,String noSelect)throws Exception{
		Object obj = field.get(this);
		if(obj instanceof View){
			((AbsListView)obj).setOnItemSelectedListener(new EventListener(this).select(select).noSelect(noSelect));
		}
	}
	
	
	private void setListener(Field field,String methodName,Method method)throws Exception{
		if(methodName == null || methodName.trim().length() == 0)
			return;
		
		Object obj = field.get(this);
		
		switch (method) {
			case Click:
				if(obj instanceof View){
					((View)obj).setOnClickListener(new EventListener(this).click(methodName));
				}
				break;
			case ItemClick:
				if(obj instanceof AbsListView){
					((AbsListView)obj).setOnItemClickListener(new EventListener(this).itemClick(methodName));
				}
				break;
			case LongClick:
				if(obj instanceof View){
					((View)obj).setOnLongClickListener(new EventListener(this).longClick(methodName));
				}
				break;
			case itemLongClick:
				if(obj instanceof AbsListView){
					((AbsListView)obj).setOnItemLongClickListener(new EventListener(this).itemLongClick(methodName));
				}
				break;
			default:
				break;
		}
	}
	
	public enum Method{
		Click,LongClick,ItemClick,itemLongClick
	}
	
}