ListView+CheckBox(三)

标签：setchecked   state_checked   oncreatedrawablestat   mergedrawablestates   setitemchecked   

activity_main.xml（）

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.harvic.checkableimageview.MainActivity" >

    <ListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="100dp"
        android:choiceMode="multipleChoice"
        android:dividerHeight="1px"
        android:scrollbars="none" />

    <Button
        android:id="@+id/all_sel"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:layout_marginBottom="50dip"
        android:text="全选" />

    <Button
        android:id="@+id/all_unsel"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:text="全部取消" />

</FrameLayout>

<?xml version="1.0" encoding="utf-8"?>
<com.harvic.checkableimageview.CheckableFrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="68dp" >

    <com.harvic.checkableimageview.CheckableImageView
        android:layout_gravity="right|center_vertical"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:layout_marginRight="10dp"
        android:clickable="false"
        android:src="@drawable/toggle" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="17dp"
        android:layout_marginTop="17dp"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="16sp" />

        <TextView
            android:id="@+id/subtitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="12sp" />
    </LinearLayout>

</com.harvic.checkableimageview.CheckableFrameLayout>

<?xml version="1.0" encoding="utf-8"?>

<selector android:constantSize="true" android:variablePadding="false" xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/toggle_on"  android:state_checked="true"/>
    <item android:drawable="@drawable/toggle_off" android:state_checked="false"/>
    <item android:drawable="@drawable/toggle_off"/>
</selector>

package com.harvic.checkableimageview;

public class DataHolder{
	public String titleStr;
	public String subTitleStr;
	
	public DataHolder(String title,String subTitle){
		titleStr = title;
		subTitleStr = subTitle;
	}
}

package com.harvic.checkableimageview;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Checkable;
import android.widget.FrameLayout;

public class CheckableFrameLayout extends FrameLayout implements Checkable {

	public CheckableFrameLayout(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	private boolean mChecked = false;

	// @Override
	// public void toggle() {
	// setChecked(!mChecked);
	// }
	//
	// @Override
	// public boolean isChecked() {
	// return mChecked;
	// }

	@Override
	public void setChecked(boolean checked) {
		if (mChecked != checked) {
			mChecked = checked;
			refreshDrawableState();
			for (int i = 0, len = getChildCount(); i < len; i++) {
				View child = getChildAt(i);
				if (child instanceof Checkable) {
					((Checkable) child).setChecked(checked);
				}
			}
		}
	}

	@Override
	public boolean isChecked() {
		// TODO Auto-generated method stub
		return false;
	}

	@Override
	public void toggle() {
		// TODO Auto-generated method stub

	}

}

package com.harvic.checkableimageview;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.Checkable;
import android.widget.ImageView;

/**
 * extraSpace如果不为0,多余的位置就可以用来放置自定义的状态,使该Drawable具有我们添加的属性 setChecked ->
 * refreshDrawableState ->onCreateDrawableState ->调用selector设置状态
 * 派生自Checkable接口,使CheckableImageView具有的可选中的状态
 * ,但当用户点击选中时,我们感觉会调用selector的state_checked="true"的状态,
 * 但state_checked属性对ImageView是无效的
 * ,因为ImageView并不具有可选中的属性,所以我们在调用selector前,应该为ImageView添加上state_checked属性
 * 这就是重写onCreateDrawableState
 * ()的原因,当用户选中时,给ImageView设置选中状态,强制使它处于选中状态中,这时,它就会调用我们的state_checked属性
 * 
 */
public class CheckableImageView extends ImageView implements Checkable {

	public CheckableImageView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	private boolean mChecked = false;
	// <attr name="state_checked" format="boolean"/>
	private static final int[] CHECKED_STATE_SET = { android.R.attr.state_checked };

	/**
	 * 返回值：如果extraSpace为0，直接返回控件本身所具有的状态集。如果extraSpace不为0，返回的值除了具有控件本身所具有的状态集，
	 * 会额外分配指定的空间以便用户自主指定状态。
	 */
	@Override
	public int[] onCreateDrawableState(int extraSpace) {
		final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
		if (mChecked) {
			mergeDrawableStates(drawableState, CHECKED_STATE_SET);
		}
		return drawableState;
	}

	@Override
	public void setChecked(boolean checked) {
		if (mChecked != checked) {
			mChecked = checked;
			refreshDrawableState();
		}
	}

	@Override
	public boolean isChecked() {
		return false;
	}

	@Override
	public void toggle() {
		
	}

//	@Override
//	public boolean isChecked() {
//		return mChecked;
//	}
//
//	@Override
//	public void toggle() {
//		setChecked(!mChecked);
//	}

}

package com.harvic.checkableimageview;

import java.util.ArrayList;
import java.util.List;
import com.example.trylistviewcheckbox.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		// 构造数据
		final List<DataHolder> dataList = new ArrayList<DataHolder>();
		for (int i = 0; i < 10; i++) {
			dataList.add(new DataHolder("harvic的blog------" + i, "harvic"));
		}
		// 构造Adapter
		ListitemAdapter adapter = new ListitemAdapter(MainActivity.this,
				dataList);
		final ListView listView = (ListView) findViewById(R.id.list);
		listView.setAdapter(adapter);

		// 全部选中按钮的处理
		Button all_sel = (Button) findViewById(R.id.all_sel);
		Button all_unsel = (Button) findViewById(R.id.all_unsel);
		all_sel.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				for (int i = 0; i < dataList.size(); i++) {
					listView.setItemChecked(i, true);
				}
			}
		});

		// 全部取消按钮处理
		all_unsel.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				for (int i = 0; i < dataList.size(); i++) {
					listView.setItemChecked(i, false);
				}
			}
		});
	}

}

package com.harvic.checkableimageview;

import java.util.List;

import com.example.trylistviewcheckbox.R;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class ListitemAdapter extends BaseAdapter {

	private List<DataHolder> mList;
	private Context mContext;
	private LayoutInflater mInflater;
	public ListitemAdapter(Context context,List<DataHolder> list){
		mList = list;
		mContext = context;
		mInflater = LayoutInflater.from(context);
	}
	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		return mList.size();
	}

	@Override
	public Object getItem(int position) {
		// TODO Auto-generated method stub
		return mList.get(position);
	}

	@Override
	public long getItemId(int position) {
		// TODO Auto-generated method stub
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		ViewHolder holder = null;  
        if (convertView == null) {  
              
            holder=new ViewHolder();    
              
            convertView = mInflater.inflate(R.layout.check_list_item, null);   
            holder.mTitle = (TextView)convertView.findViewById(R.id.title);  
            holder.mSubTitile = (TextView)convertView.findViewById(R.id.subtitle);  
            convertView.setTag(holder);  
              
        }else {  
              
            holder = (ViewHolder)convertView.getTag();  
        }  
           
        holder.mTitle.setText((String)mList.get(position).titleStr);  
        holder.mSubTitile.setText((String)mList.get(position).subTitleStr);  
        return convertView;  
	}
	
	public class ViewHolder{
		public TextView mTitle;
		public TextView mSubTitile;	
	};
	
	
	

}

ListView+CheckBox(三)

标签：setchecked   state_checked   oncreatedrawablestat   mergedrawablestates   setitemchecked   

原文地址：http://blog.csdn.net/u013210620/article/details/47807157