Java Android通过毕加索从URL向gridView显示图像
我有一个带有表image的数据库,我有id\u image(int),image\u name(string) 这是用于获取图像名称URL的web服务= 这是如何调用ImageURL的 ImageUrl= gridItem.javaJava Android通过毕加索从URL向gridView显示图像,java,android,image,gridview,picasso,Java,Android,Image,Gridview,Picasso,我有一个带有表image的数据库,我有id\u image(int),image\u name(string) 这是用于获取图像名称URL的web服务= 这是如何调用ImageURL的 ImageUrl= gridItem.java public class gridItem { String imageUrl; String barang; public gridItem(String barang, String imageUrl) { super()
public class gridItem {
String imageUrl;
String barang;
public gridItem(String barang, String imageUrl) {
super();
this.imageUrl = imageUrl;
this.barang = barang;
}
public String getImageUrl() {
return imageUrl;
}
public String getBarang() {
return barang;
}
}
Java
public class CustomGridViewAdapter extends ArrayAdapter<gridItem> {
Context context;
int layoutResourceId;
ArrayList<gridItem> data = new ArrayList<>();
public CustomGridViewAdapter(Context context, int layoutResourceId,
ArrayList<gridItem> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
RecordHolder holder;
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
holder = new RecordHolder();
holder.txtTitle = (TextView) row.findViewById(R.id.tvItem);
holder.imageItem = (ImageView) row.findViewById(R.id.imageView);
row.setTag(holder);
} else {
holder = (RecordHolder) row.getTag();
}
gridItem item = data.get(position);
holder.txtTitle.setText(item.getBarang());
Picasso.with(context).
load(item.getImageUrl()).
into(holder.imageItem);
return row;
}
static class RecordHolder {
TextView txtTitle;
ImageView imageItem;
}
}
公共类CustomGridViewAdapter扩展了ArrayAdapter{
语境;
国际布局资源;
ArrayList数据=新的ArrayList();
公共CustomGridViewAdapter(上下文上下文,int-layoutResourceId,
ArrayList数据){
超级(上下文、布局资源ID、数据);
this.layoutResourceId=layoutResourceId;
this.context=上下文;
这个数据=数据;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
视图行=转换视图;
记录持有者;
if(行==null){
LayoutInflater充气器=((活动)上下文)。getLayoutInflater();
行=充气机。充气(layoutResourceId,父级,false);
holder=新记录持有者();
holder.txtTitle=(TextView)row.findViewById(R.id.tviItem);
holder.imageItem=(ImageView)row.findViewById(R.id.ImageView);
row.setTag(支架);
}否则{
holder=(RecordHolder)row.getTag();
}
gridItem项=data.get(位置);
holder.txtTitle.setText(item.getBarang());
毕加索。与(上下文)。
加载(item.getImageUrl())。
进入(持有人、项目);
返回行;
}
静态类记录保持器{
TextView-txtTitle;
图像查看图像项;
}
}
MainActivity.Java
public class MainActivity extends ActionBarActivity {
JSONParser jParser= new JSONParser();
ArrayList<HashMap<String, String>> nameList;
JSONArray names=null;
GridView data;
private static final String URL_TEST_BARANG= "http://lomapod.azurewebsites.net/readBarang.php?id_penjual=1";
private static final String TAG_PESAN = "message";
private static final String TAG_HASIL = "result";
private static final String TAG_BARANG = "nama_barang";
private static final String TAG_IMAGE= "image_name";
ImageView imageview;
CustomGridViewAdapter mGridAdapter;
ArrayList<gridItem> mGridData;
public MainActivity()
{}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
data=(GridView) findViewById(R.id.lvSeller);
nameList= new ArrayList<HashMap<String, String>>();
imageview =(ImageView) findViewById(R.id.imageView);
mGridData=new ArrayList<>();
mGridAdapter=new CustomGridViewAdapter(this,R.layout.grid_item,mGridData);
data.setAdapter(mGridAdapter);
new AmbilDataJson().execute();
}
public class AmbilDataJson extends AsyncTask<String,String,String> {
int sukses=0;
public AmbilDataJson() {}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected String doInBackground(String... args) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
try
{
JSONObject json = jParser.makeHttpRequest(URL_TEST_BARANG, "GET", params);
if(json != null)
{
sukses = json.getInt(TAG_PESAN);
if(sukses == 0)
{
nameList = new ArrayList<HashMap<String,String>>();
Log.d("Semua Nama: ", json.toString());
names = json.getJSONArray(TAG_HASIL);
for(int i = 0; i < names.length();i++)
{
JSONObject c = names.getJSONObject(i);
String barang = c.getString(TAG_BARANG);
String image = "lomapod.esy.es/assets/"+c.getString(TAG_IMAGE);
HashMap<String,String> map = new HashMap<String,String>();
map.put(TAG_BARANG,barang);
map.put(TAG_IMAGE,image);
nameList.add(map);
}
}
}
}catch(JSONException e)
{
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
if(sukses == 0)
{
CustomGridViewAdapter adapter = new CustomGridViewAdapter(
MainActivity.this,R.layout.grid_item,mGridData);
mGridAdapter.setGridData(mGridData);
}
else
{
Toast.makeText(MainActivity.this,"Failed",Toast.LENGTH_LONG);
}
}
}
}
公共类MainActivity扩展了ActionBarActivity{
JSONParser jParser=新的JSONParser();
ArrayList名称列表;
JSONArray name=null;
网格视图数据;
私有静态最终字符串URL\u TEST\u BARANG=”http://lomapod.azurewebsites.net/readBarang.php?id_penjual=1";
私有静态最终字符串标记_PESAN=“message”;
私有静态最终字符串标记_HASIL=“result”;
私有静态最终字符串标记_BARANG=“nama_BARANG”;
私有静态最终字符串TAG\u IMAGE=“IMAGE\u name”;
图像视图图像视图;
CustomGridViewAdapter mGridAdapter;
ArrayList mGridData;
公共活动()
{}
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
数据=(GridView)findViewById(R.id.lvSeller);
名称列表=新的ArrayList();
imageview=(imageview)findViewById(R.id.imageview);
mGridData=newarraylist();
mGridAdapter=新的CustomGridViewAdapter(此,R.layout.grid_项,mGridData);
data.setAdapter(mGridAdapter);
新的AmbilDataJson().execute();
}
公共类AmbilDataJson扩展异步任务{
int-sukses=0;
公共AmbilDataJson(){}
@凌驾
受保护的void onPreExecute(){
super.onPreExecute();
}
@凌驾
受保护的字符串doInBackground(字符串…args){
List params=new ArrayList();
尝试
{
JSONObject json=jParser.makeHttpRequest(URL_TEST_BARANG,“GET”,params);
if(json!=null)
{
sukses=json.getInt(TAG_PESAN);
if(sukses==0)
{
名称列表=新的ArrayList();
Log.d(“Semua Nama:,json.toString());
name=json.getJSONArray(TAG_HASIL);
对于(int i=0;i
我想在android studio中向gridview显示图像,但我不知道在MainActivity中应该做什么
谁能告诉我怎么做?首先,您需要填写您的列表,并将其传递给适配器。之后,需要将适配器设置为GridView 我不会代替你做,但我会写一些关于你主要活动的评论,并编辑这个答案。我已经更新了主要内容,你能帮我找到错误吗?对不起,我真的忘了。您现在面临什么问题?gridview中的图像无法加载