Android之图文混排（二）源代码

结果截图：

Android之图文混排（二）源代码_第1张图片

包含三个类文件：CommonUri.java 、DownIoadImage.java 、 MainActivity.java

两个layout文件：activity_main.xml item.xml

activity_main.xml文件：

item.xml文件：

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

CommonUri类用于存储Uri

public class CommonUri {public static String PRODUCT_URL = "";public static String PRODUCT_IMG = "";}

DownloadImage类用于从服务器下载图片

public class DownloadImage {private String image_path;public DownloadImage(String image_path) {// TODO Auto-generated constructor stubthis.image_path = image_path;}public void loadImage(final ImageCallBack callBack){final Handler handler = new Handler(){@Overridepublic void handleMessage(Message msg) {// TODO Auto-generated method stubsuper.handleMessage(msg);callBack.getDrawable((Drawable)msg.obj);}};new Thread(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubtry {Drawable drawable = Drawable.createFromStream(new URL(image_path).openStream(), "");Message message = Message.obtain();message.obj = drawable;handler.sendMessage(message);} catch (MalformedURLException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}).start();}//接口的回调方式public interface ImageCallBack{public void getDrawable(Drawable drawable);  }}

MainActivity类：

//图文混排，先保证文字出现public class MainActivity extends Activity {private MyAdapter adapter = null;private ListView listView = null;private ProgressDialog dialog = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);listView = (ListView)findViewById(R.id.listView1);adapter  = new MyAdapter(this);dialog = new ProgressDialog(this);dialog.setTitle("提示下载信息");dialog.setMessage("正在下载，请稍后...");new MyTask().execute(CommonUri.PRODUCT_URL);}public class MyAdapter extends BaseAdapter{Context context = null;private LayoutInflater layoutInflater ;private List > list;public MyAdapter(Context context){this.context = context;layoutInflater = layoutInflater.from(context);}public void setData(List > list){this.list = list;}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn list.size();}@Overridepublic Object getItem(int position) {// TODO Auto-generated method stubreturn list.get(position);}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubView view = null;if(convertView == null){view = layoutInflater.inflate(R.layout.item, null);}elseview = convertView;TextView name = (TextView)findViewById(R.id.textView1);TextView address = (TextView)findViewById(R.id.textView2);TextView price = (TextView)findViewById(R.id.textView3);name.setText(list.get(position).get("proname").toString());//产品名address.setText(list.get(position).get("proaddress").toString());//产品地址price.setText(list.get(position).get("proprice").toString());//产品价格final ImageView imageView = (ImageView)findViewById(R.id.imageView1);DownloadImage downloadImage = new DownloadImage(CommonUri.PRODUCT_IMG + list.get(position).get("proimage").toString());downloadImage.loadImage(new DownloadImage.ImageCallBack() {@Overridepublic void getDrawable(Drawable drawable) {// TODO Auto-generated method stubimageView.setImageDrawable(drawable);}});return view;//imageView.setImageBitmap(bm);实际开发中，最好选用Bitmap}}public class MyTask extends AsyncTask>>{@Overrideprotected void onPreExecute() {// TODO Auto-generated method stubsuper.onPreExecute();dialog.show();}@Overrideprotected void onPostExecute(List> result) {// TODO Auto-generated method stubsuper.onPostExecute(result);dialog.dismiss();adapter.setData(result);listView.setAdapter(adapter);adapter.notifyDataSetChanged();}@Overrideprotected void onProgressUpdate(Void... values) {// TODO Auto-generated method stubsuper.onProgressUpdate(values);}@Overrideprotected List> doInBackground(String... params) {// TODO Auto-generated method stubList> list = new ArrayList>();try {HttpClient client = new DefaultHttpClient();HttpPost  post = new HttpPost(params[0]);HttpResponse response = client.execute(post);if(response.getStatusLine().getStatusCode() == 200){String jsonString = EntityUtils.toString(response.getEntity(), "utf-8");//接下来，对于jsonString进行解析//略......见图////}} catch (Exception e) {e.printStackTrace();}return list;}}}

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