显示位图图像的ImageView通过简单的适配器位图、适配器、图像、简单
2023-09-06 00:53:04
作者：强颜≠欢笑
我从一个URL获得的图像。我使用的ImageView的列表视图。我要位图图像列表添加到列表项的每一行。我用SimpleAdapter但ImageView的显示blank.My code低于!!
的ArrayList＆LT; HashMap的＆LT;字符串，位图＆GT;＆GT; mylist中=新的ArrayList＆LT; HashMap的＆LT;字符串，位图＆GT;＆GT;（）;
束束= this.getIntent（）getExtras（）。
GET = bundle.getString（姓名）;
尝试{
HttpClient的HttpClient的=新DefaultHttpClient（）;
HttpPost httppost =新HttpPost（http://www.propertyhookup.com/mobile/propertylist.php）;
namevaluepairs中=新的ArrayList＆LT;的NameValuePair＆GT;（1）;
nameValuePairs.add（新BasicNameValuePair（ZIP code，get.trim（）））;
httppost.setEntity（新UrlEn codedFormEntity（namevaluepairs中））;
HTT presponse响应= httpclient.execute（httppost）;
HttpEntity实体= response.getEntity（）;
是= entity.getContent（）;
}赶上（例外五）{
Toast.makeText（getApplicationContext（），e.getMessage（），Toast.LENGTH_LONG）.show（）;
}
//转换响应串
尝试{
的BufferedReader读卡器=新的BufferedReader（新InputStreamReader的（就是，ISO-8859-1），8）;
StringBuilder的SB =新的StringBuilder（）;
串线= NULL;
而（（行= reader.readLine（））！= NULL）{
sb.append（行+\ N）;
}
is.close（）;
结果= sb.toString（）;
}赶上（例外五）{
Toast.makeText（getApplicationContext（），e.getMessage（），Toast.LENGTH_LONG）.show（）;
}
如果（result.length（）＆其中; = 7）{
Toast.makeText（getApplicationContext（），无属性这个zip code或检查你的拉链code，Toast.LENGTH_LONG）.show（）;
//text.setText("No属性这个zip code或检查你的拉链code）;
}
其他{
尝试{
jArray =新的JSONObject的（结果）;
}赶上（JSONException E）{
Toast.makeText（getApplicationContext（），e.getMessage（），Toast.LENGTH_LONG）.show（）;
}
// JSONObject的JSON = JSONfunctions.getJSONfromURL（http://192.168.1.111/propertyhookup.com/mobile/propertylist.php）;
尝试{
JSONArray地震= jArray.getJSONArray（地震）;
的for（int i = 0;我小于10;我++）{
图=新的HashMap＆LT;字符串，位图＆GT;（）;
// HashMap的＆LT;字符串，可绘制＆GT; MAP1 =新的HashMap＆LT;字符串，可绘制＆GT;（）;
JSONObject的E = earthquakes.getJSONObject（我）;
如果（e.getString（房产类型）。包含（1））{
proptype =套房;
}否则如果（e.getString（房产类型）。包含（2））{
proptype =公寓;
}否则如果（e.getString（房产类型）。包含（3））{
proptype =联排别墅;
}
如果（e.getString（estimated_price）。包含（0））{
估计=没有足够的市场价值;
// estimat =（TextView中）findViewById（R.id.estimat）;
//estimat.setTextColor(Color.rgb(0，0，23））;
}其他 {
估计=$+ e.getString（estimated_price）;
}
相片= e.getString（照片1）;
绘制= LoadImageFromWebOperations（照片）;
//text.setImageDrawable(d）;
尝试
{
aURL =新的URL（照片）;
}
赶上（MalformedURLException的E1）
{
// TODO自动生成的catch块
e1.printStackTrace（）;
}
URLConnection的康恩= NULL;
尝试
{
康恩= aURL.openConnection（）;
}
赶上（IOException异常E1）
{
// TODO自动生成的catch块
e1.printStackTrace（）;
}
尝试
{
conn.connect（）;
}
赶上（IOException异常E1）
{
// TODO自动生成的catch块
e1.printStackTrace（）;
}
InputStream的是= NULL;
尝试
{
是= conn.getInputStream（）;
}
赶上（IOException异常E1）
{
// TODO自动生成的catch块
e1.printStackTrace（）;
}
的BufferedInputStream双=新
的BufferedInputStream（是，8 * 1024）;
位图BM = BitmapFactory.de codeStream（之二）;
map.put（照片，BM）;
mylist.add（图）
}
}赶上（JSONException E）{
Toast.makeText（getApplicationContext（），e.getMessage（），Toast.LENGTH_LONG）.show（）;
}
SimpleAdapter适配器=新SimpleAdapter（这一点，mylist中，R.layout.main4，
新的String [] {百分比，物业ID，城市名，国家code，属性类型，素材，卫浴，卧室，价格，估计，照片}，
新的INT [] {R.id.percent，R.id.property_id，R.id.city_name，R.id.state_ code，R.id.prop_type，R.id.foot，R.id.bath ，R.id.bed，R.id.list，R.id.estimat，R.id.image}）;
setListAdapter（适配器）;
解决方案
我觉得是因为你下载的网站形象，你需要在异步做这些见无痛thrething下载图像和刷新后只是imageviews。
I am getting image from an url. I am using imageview in listview. I want to add the list of bitmap images into the each row of the list item. I used SimpleAdapter but the imageview shows blank.My code is below !!
ArrayList<HashMap<String, Bitmap>> mylist = new ArrayList<HashMap<String, Bitmap>>();
Bundle bundle = this.getIntent().getExtras();
get = bundle.getString("name");
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.propertyhookup.com/mobile/propertylist.php");
nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("zipcode", get.trim()));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}catch(Exception e){
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
if(result.length()<= 7){
Toast.makeText(getApplicationContext(), "No properties for this zipcode or check your zipcode ", Toast.LENGTH_LONG).show();
//text.setText("No properties for this zipcode or check your zipcode");
}
else{
try{
jArray = new JSONObject(result);
}catch(JSONException e){
Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
//JSONObject json = JSONfunctions.getJSONfromURL("http://192.168.1.111/propertyhookup.com/mobile/propertylist.php");
try{
JSONArray earthquakes = jArray.getJSONArray("earthquakes");
for(int i=0;i<10;i++){
map = new HashMap<String, Bitmap>();
//HashMap<String, Drawable> map1 = new HashMap<String, Drawable>();
JSONObject e = earthquakes.getJSONObject(i);
if(e.getString("property_type").contains("1")) {
proptype ="Single Family Home";
}else if(e.getString("property_type").contains("2")) {
proptype="Condo";
}else if(e.getString("property_type").contains("3")) {
proptype="Townhouse";
}
if(e.getString("estimated_price").contains("0")) {
estimate = "Not Enough Market Value";
//estimat = (TextView) findViewById(R.id.estimat);
//estimat.setTextColor(Color.rgb(0, 0, 23));
}else {
estimate = "$"+e.getString("estimated_price");
}
photo = e.getString("photo1");
drawable = LoadImageFromWebOperations(photo);
//text.setImageDrawable(d);
try
{
aURL = new URL(photo);
}
catch (MalformedURLException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
URLConnection conn = null;
try
{
conn = aURL.openConnection();
}
catch (IOException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
try
{
conn.connect();
}
catch (IOException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
InputStream is = null;
try
{
is = conn.getInputStream();
}
catch (IOException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
BufferedInputStream bis = new
BufferedInputStream(is,8*1024);
Bitmap bm = BitmapFactory.decodeStream(bis);
map.put(photos, bm);
mylist.add(map);
}
}catch(JSONException e) {
Toast.makeText(getApplicationContext(),e.getMessage(), Toast.LENGTH_LONG).show();
}
SimpleAdapter adapter = new SimpleAdapter(this, mylist , R.layout.main4,
new String[] { "percent","propertyid", "cityname", "statecode", "propertytype", "footage", "bathroom", "bedroom", "price", "estimated", "photos" },
new int[] { R.id.percent, R.id.property_id, R.id.city_name, R.id.state_code, R.id.prop_type, R.id.foot, R.id.bath, R.id.bed, R.id.list, R.id.estimat, R.id.image});
setListAdapter(adapter);
解决方案
i think is because you are downloading the image from web and you need to do these in ASYNC see painless thrething download image and after that refresh just the imageviews.
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