android左右滚动焦点图【改】

package com.demo.activity; import java.util.HashMap; import java.util.Map; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.LayoutInflater; import android.view.View; import android.widget.AdapterView; import android.widget.ImageView; import android.widget.TextView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.Gallery; public class MainActivity extends Activity { private Gallery gallery; private FocusAdapter adapter; private TextView focusIntroText; private ImageView focusPointImage; private int preIndex=0; private Handler handler=new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); switch(msg.arg1){ case 1: String intro=msg.getData().getString("intro"); int index=msg.getData().getInt("index"); focusIntroText.setText(intro); int resid=R.drawable.focus_point_1; switch (index){ case 0: resid=R.drawable.focus_point_1; break; case 1: resid=R.drawable.focus_point_2; break; case 2: resid=R.drawable.focus_point_3; break; case 3: resid=R.drawable.focus_point_4; break; case 4: resid=R.drawable.focus_point_5; break; } focusPointImage.setBackgroundResource(resid); break; } } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); gallery=(Gallery)findViewById(R.id.gallery); adapter=new FocusAdapter(this); Map<String,Object> map1=new HashMap<String,Object>(); map1.put("focusImage",R.drawable.focus_1); map1.put("intro", "这是内容简介1这是内容简介1这是内容简介1这是内容简介1这是内容简介1这是内容简介1"); Map<String,Object> map2=new HashMap<String,Object>(); map2.put("focusImage",R.drawable.focus_2); map2.put("intro", "这是内容简介2这是内容简介2这是内容简介2这是内容简介2这是内容简介2这是内容简介2"); Map<String,Object> map3=new HashMap<String,Object>(); map3.put("focusImage",R.drawable.focus_3); map3.put("intro", "这是内容简介3这是内容简介3这是内容简介3这是内容简介3这是内容简介3这是内容简介3"); Map<String,Object> map4=new HashMap<String,Object>(); map4.put("focusImage",R.drawable.focus_4); map4.put("intro", "这是内容简介4这是内容简介4这是内容简介4这是内容简介4这是内容简介4这是内容简介4"); Map<String,Object> map5=new HashMap<String,Object>(); map5.put("focusImage",R.drawable.focus_5); map5.put("intro", "这是内容简介5这是内容简介5这是内容简介5这是内容简介5这是内容简介5这是内容简介5"); adapter.addFocus(map1); adapter.addFocus(map2); adapter.addFocus(map3); adapter.addFocus(map4); adapter.addFocus(map5); gallery.setAdapter(adapter); gallery.setOnItemSelectedListener(new OnItemSelectedListener(){ @Override public void onItemSelected(AdapterView<?> arg0, final View view, final int position, long arg3) { //影片说明 focusIntroText=(TextView)view.findViewById(R.id.focus_introText); //焦点指针 focusPointImage=(ImageView)view.findViewById(R.id.focus_pointImage); int resid=R.drawable.focus_point_1; switch (preIndex){ case 0: resid=R.drawable.focus_point_1; break; case 1: resid=R.drawable.focus_point_2; break; case 2: resid=R.drawable.focus_point_3; break; case 3: resid=R.drawable.focus_point_4; break; case 4: resid=R.drawable.focus_point_5; break; } focusPointImage.setBackgroundResource(resid); preIndex=position; new Thread(new Runnable(){ @Override public void run() { try { Thread.sleep(700); Map map=adapter.getItem(position); Message msg=new Message(); msg.getData().putString("intro",map.get("intro").toString()); msg.getData().putInt("index",position); msg.arg1=1; handler.sendMessage(msg); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }).start(); } @Override public void onNothingSelected(AdapterView<?> arg0) { // TODO Auto-generated method stub } }); } }