两种方法动态改变ListView布局

在getView()时，通过判断选择加载不同的布局。

点击某个item的时候，变为foucus状态，其他的items还原。

下面用两个方法给item设置两个不同的布局。

//foucus状态，显示一个ImageView
    private View addFocusView(int i) {
        ImageView iv = new ImageView(mContext);
        iv.setImageResource(R.drawable.ic_launcher);
        return iv;
    }
//normal状态显示一个ImageView和一个TextView
    private View addNormalView(int i) {
        LinearLayout layout = new LinearLayout(mContext);
        layout.setOrientation(LinearLayout.HORIZONTAL);
        ImageView iv = new ImageView(mContext);
        iv.setImageResource(R.drawable.ic);
        layout.addView(iv, new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT,
                LinearLayout.LayoutParams.WRAP_CONTENT));
        TextView tv = new TextView(mContext);
        tv.setText(mData.get(i));
        layout.addView(tv, new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT,
                LinearLayout.LayoutParams.WRAP_CONTENT));
        layout.setGravity(Gravity.CENTER);
        return layout;
    }

FocusListViewAdapter.java

package sunny.example.ahfourlistviewfocus;

import android.content.Context;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.List;

public class FocusListViewAdapter extends BaseAdapter {

    private ListmData;
    private Context mContext;
    private int mCurrentItem = 0;

    public FocusListViewAdapter(Context context, Listdata) {
        this.mContext = context;
        this.mData = data;
    }

    public int getCount() {
        return mData.size();
    }

    public Object getItem(int position) {
        return mData.get(position);
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        LinearLayout layout = new LinearLayout(mContext);
        layout.setOrientation(LinearLayout.VERTICAL);
        if (mCurrentItem == position) {
            layout.addView(addFocusView(position));
        } else {
            layout.addView(addNormalView(position));
        }
        return layout;
    }

    public void setCurrentItem(int currentItem) {
        this.mCurrentItem = currentItem;
    }
//foucus状态，显示一个ImageView
    private View addFocusView(int i) {
        ImageView iv = new ImageView(mContext);
        iv.setImageResource(R.drawable.ic_launcher);
        return iv;
    }
//normal状态显示一个ImageView和一个TextView
    private View addNormalView(int i) {
        LinearLayout layout = new LinearLayout(mContext);
        layout.setOrientation(LinearLayout.HORIZONTAL);
        ImageView iv = new ImageView(mContext);
        iv.setImageResource(R.drawable.ic);
        layout.addView(iv, new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT,
                LinearLayout.LayoutParams.WRAP_CONTENT));
        TextView tv = new TextView(mContext);
        tv.setText(mData.get(i));
        layout.addView(tv, new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT,
                LinearLayout.LayoutParams.WRAP_CONTENT));
        layout.setGravity(Gravity.CENTER);
        return layout;
    }
}

activity_main.xml

MainActivity.java

package sunny.example.ahfourlistviewfocus;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends ActionBarActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		 ListView listView = (ListView) findViewById(R.id.focus_listView);
	        Listdata = new ArrayList();
	        data.add("I am item 1");
	        data.add("I am item 2");
	        data.add("I am item 3");
	        data.add("I am item 4");
	        data.add("I am item 5");
	        final FocusListViewAdapter adapter = new FocusListViewAdapter(this, data);
	      
	        /* public void setAdapter (ListAdapter adapter) 
	       Sets the data behind this ListView.*/
	        listView.setAdapter(adapter);
	        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
	            @Override
	            public void onItemClick(AdapterView parent, View view,
	                                    int position, long id) {
	                adapter.setCurrentItem(position);///
	                /*void android.widget.BaseAdapter.notifyDataSetChanged()
Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself.
*/				//刷新布局
	                adapter.notifyDataSetChanged();
	            }
	        });
	    }
	}	

foucus item3的情况