请问我一直在尝试将recson视图中的json数据显示到另一个活动，但只显示textview而图像没有显示。这是我的代码
public class MainActivity extends AppCompatActivity {
public String content;
public static MainActivity parse(JSONObject object){
MainActivity post=new MainActivity();
post.content = Html.fromHtml(object.optString("content")).toString();
return post;
}
ImageView thumbnail;
TextView title;
private static final String TAG = "RecyclerViewExample";
private SwipeRefreshLayout swipeRefreshLayout;
private List<FeedItem> feedsList;
private RecyclerView mRecyclerView;
private MyRecyclerAdapter adapter;
private ProgressBar progressBar;
public MainActivity(){
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_feed_list);
// Initialize recycler view
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
progressBar = (ProgressBar) findViewById(R.id.progress_bar);
progressBar.setVisibility(View.VISIBLE);
// Downloading data from below url
final String url = "http://street2view.com/api/get_recent_posts/";
new AsyncHttpTask().execute(url);
}
public class AsyncHttpTask extends AsyncTask<String, Void, Integer> {
@Override
protected void onPreExecute() {
setProgressBarIndeterminateVisibility(true);
}
@Override
protected Integer doInBackground(String... params) {
Integer result = 0;
HttpURLConnection urlConnection;
try {
URL url = new URL(params[0]);
urlConnection = (HttpURLConnection) url.openConnection();
int statusCode = urlConnection.getResponseCode();
// 200 represents HTTP OK
if (statusCode == 200) {
BufferedReader r = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder response = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
response.append(line);
}
parseResult(response.toString());
result = 1; // Successful
} else {
result = 0; //"Failed to fetch data!";
}
} catch (Exception e) {
Log.d(TAG, e.getLocalizedMessage());
}
return result; //"Failed to fetch data!";
}
@Override
protected void onPostExecute(Integer result) {
// Download complete. Let us update UI
progressBar.setVisibility(View.GONE);
if (result == 1) {
adapter = new MyRecyclerAdapter(MainActivity.this, feedsList);
mRecyclerView.setAdapter(adapter);
} else {
Toast.makeText(MainActivity.this, "Check Your Internet Connection", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public boolean onCreateOptionsMenu(final Menu menu) {
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (item.getItemId() == R.id.about) {
Intent settingsActivityIntent = new Intent();
settingsActivityIntent.setClass(this, AboutActivity.class);
this.startActivityForResult(settingsActivityIntent, 111);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onBackPressed() {
new AlertDialog.Builder(this)
.setTitle("Quit")
.setMessage("Do you wish to exit the app?")
.setCancelable(false)
.setNegativeButton(android.R.string.no, null)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
finish();
}
}).create().show();
}
public String stripHtmlTags(String html) {
return Html.fromHtml(html).toString();
}
private void parseResult(String result) {
try {
JSONObject response = new JSONObject(result);
JSONArray posts = response.optJSONArray("posts");
feedsList = new ArrayList<>();
for (int i = 0; i < posts.length(); i++) {
JSONObject post = posts.optJSONObject(i);
FeedItem item = new FeedItem();
item.setTitle(post.optString("title"));
item.setContent(post.optString("content"));
item.setdate(post.optString("date"));
JSONArray attachments = post.getJSONArray("attachments");
if (null != attachments && attachments.length() > 0) {
JSONObject attachment = attachments.getJSONObject(0);
if (attachment != null)
item.setAttachmentUrl(attachment.getString("url"));
}
JSONArray categories = post.getJSONArray("categories");
if (null != categories && categories.length() > 0) {
JSONObject attachment = categories.getJSONObject(0);
if (categories != null)
item.setCategories(attachment.getString("title"));
}
feedsList.add(item);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
这是我用来将数据从回收站视图发送到第二个活动的适配器类
public class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerAdapter.CustomViewHolder> {
private List<FeedItem> feedItemList;
private Context mContext;
public MyRecyclerAdapter(Context context, List<FeedItem> feedItemList) {
this.feedItemList = feedItemList;
this.mContext = context;
}
@Override
public CustomViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_row, null);
CustomViewHolder viewHolder = new CustomViewHolder(view,mContext, (ArrayList<FeedItem>) feedItemList);
return viewHolder;
}
@Override
public void onBindViewHolder(CustomViewHolder customViewHolder, int i) {
FeedItem feedItem = feedItemList.get(i);
//Download image using picasso library
Glide.with(mContext).load(feedItem.getAttachmentUrl())
.error(R.color.list_item_title)
.placeholder(R.color.list_item_title)
.into(customViewHolder.imageView);
//Setting text view title
customViewHolder.textView.setText((feedItem.getTitle()));
customViewHolder.textView2.setText(feedItem.getdate());
customViewHolder.categories.setText(feedItem.getCategories());
}
@Override
public int getItemCount() {
return (null != feedItemList ? feedItemList.size() : 0);
}
public class CustomViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
protected ImageView imageView;
protected TextView textView2;
protected TextView textView;
protected TextView content;
protected TextView categories;
public RelativeLayout relativeLayout;
ArrayList<FeedItem> feeditem = new ArrayList<FeedItem>();
Context ctx;
public CustomViewHolder(View view, Context ctx, ArrayList<FeedItem> feeditem) {
super(view);
view.setOnClickListener(this);
this.ctx = ctx;
this.feeditem = feeditem;
this.imageView = (ImageView) view.findViewById(R.id.thumbnail);
this.textView2 = (TextView) view.findViewById(R.id.date);
this.categories = (TextView) view.findViewById(R.id.categories);
this.textView = (TextView) view.findViewById(R.id.title);
}
@Override
public void onClick(View v) {
int position = getAdapterPosition();
FeedItem feeditem = this.feeditem.get(position);
Intent intent = new Intent(this.ctx,Main2Activity.class);
intent.putExtra("title",feeditem.getTitle());
intent.putExtra("content",feeditem.getContent());
Html.fromHtml(String.valueOf(intent.putExtra("content",feeditem.getContent()))).toString();
intent.putExtra("thumbnail",feeditem.getAttachmentUrl());
this.ctx.startActivity(intent);
}
}
}
这是我要显示json数据的第二个活动（当我运行应用程序时，textview显示但是imageview非常感谢）
public class Main2Activity extends AppCompatActivity {
ImageView imageView;
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
imageView = (ImageView)findViewById(R.id.contentImage);
textView = (TextView)findViewById(R.id.title2);
textView.setText(getIntent().getStringExtra("title"));
imageView.setImageResource(getIntent().getIntExtra("thumbnail", 00));
}}
答案 0 :(得分：0)
你可以试试这个
public class Main2Activity extends AppCompatActivity {
ImageView imageView;
TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
imageView = (ImageView) findViewById(R.id.contentImage);
textView = (TextView) findViewById(R.id.title2);
String title = getIntent().getStringExtra("title");
String thumbnail = getIntent().getStringExtra("thumbnail");
textView.setText(title);
// set image here
Glide.with(this).load(thumbnail)
.into(imageView);
}
}