我已经研究过了，但没有任何东西符合我的要求。我有一个菜谱类型列表，如果我点击其中一个类别（开胃菜），它会把我带到另一个列表中：一个包含开胃菜列表的列表视图。如果我单击列表中的其中一项，它将带我进入一个活动，该活动的图像、标题、标题下的烹饪时间以及图像和文本视图下的食谱本身。
编辑以显示要查询分析的代码：
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>("Appetizers");
query.addAscendingOrder("appetizer");
query.findInBackground(new FindCallback<ParseObject>() {
@Override
public void done(List<ParseObject> recipes, ParseException e) {
if (e == null) {
// success
} else {
// error
}
我该怎么做？
开胃菜清单：
活动：
编辑：
开胃菜：
public class AppetizerAdapter extends ArrayAdapter {
protected Context myContext;
protected List myAppetizer;
public AppetizerAdapter(Context context, List myappetizer) {
super(context, R.layout.custom_appetizer, myappetizer);
myContext = context;
myAppetizer = myappetizer;
}
// inflates each row of the app
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// initialize viewholder
ViewHolder holder;
if (convertView == null) { // If no items in the view to be displayed
convertView = LayoutInflater.from(myContext).inflate(
R.layout.custom_appetizer, null);
// initialize the views
holder = new ViewHolder(); // creates a new view
holder.appetizerTextView = (TextView) convertView // calls the view
.findViewById(R.id.appetizer);
holder.appetizerImageView = (ImageView) convertView.findViewById(R.id.appetizerImage);
holder.cookTimeTextView = (TextView) convertView.findViewById(R.id.cookTime);
// call the view and setTag to the parameter (holder)
convertView.setTag(holder);
} else { // if view is previously displayed
// initialize holder
holder = (ViewHolder) convertView.getTag();
}
// get the position of the row
ParseObject appObject = (ParseObject) myAppetizer.get(position);
// Title and Cook Time
String app = appObject.getString("appetizer"); // column passing
holder.appetizerTextView.setText(app);
String cook = appObject.getString("cookTime");
holder.cookTimeTextView.setText(cook);
// image
Picasso.with(getContext()).load(appObject.getParseFile("imageFiles").getUrl())
.into(holder.appetizerImageView);
return convertView; // return the view
}
public static class ViewHolder {
// declaration of variables
TextView appetizerTextView;
TextView cookTimeTextView;
ImageView appetizerImageView;
}
}
开胃菜.java
public class Appetizer extends ListActivity {
protected List<ParseObject> mAppetizers;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_appetizer);
ParseAnalytics.trackAppOpenedInBackground(getIntent());
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>("Appetizers");
query.addAscendingOrder("appetizer");
query.findInBackground(new FindCallback<ParseObject>() {
@Override
public void done(List<ParseObject> appetizer, ParseException e) {
if (e == null) {
// success
mAppetizers = appetizer;
AppetizerAdapter adapter = new AppetizerAdapter(getListView().getContext(),
mAppetizers);
setListAdapter(adapter);
} else {
// there is a problem
AlertDialog.Builder builder = new AlertDialog.Builder(Appetizer.this);
builder.setMessage(e.getMessage());
builder.setTitle("Sorry");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// close the dialog
dialog.dismiss();
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_directory, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
// click on a row item
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Intent intent = new Intent(Appetizer.this, AppetizerRecipe.class);
startActivity(intent);
}
}
我有一个名为内容开胃菜菜谱的布局，它包含图片图片中的布局和3个文本视图（不是列表）。开胃菜是一种appcompativity。
希望这有助于解决我的问题。
最佳答案
假设您有一个Recipe类和一些ArrayAdapter<Recipe>实现，那么您应该能够遍历解析返回给您的值列表，并使用适当的方法从ParseObject中提取值。
arrayadapter负责在textviews和imageviews中显示正确的数据。
ListView lv = (ListView) findViewById(R.id.listView); // TODO
List<Recipe> recipeList = new ArrayList<Recipe>();
final RecipeAdapter adapter = new RecipeAdapter(RecipeActivity.this, recipeList);
lv.setAdapter(adapter);
ParseQuery<ParseObject> query = new ParseQuery<ParseObject>("Appetizers");
query.addAscendingOrder("appetizer");
query.findInBackground(new FindCallback<ParseObject>() {
@Override
public void done(List<ParseObject> recipes, ParseException e) {
if (e == null) {
for (ParseObject po : recipes) {
Recipe r = new Recipe();
// TODO: Retrieve fields from the ParseObject
r.setName(po.get...);
r.setTime(po.get...);
r.setImageUrl(po.get...);
adapter.add(r);
}
} else {
// error
}
});
如果您没有这个
Recipe类，那么只需像您所做的那样将List<ParseObject>加载到适配器中，然后在onListItemClick方法中，您可以使用position参数从该列表中获取特定对象。在这里，您还需要在
public static final String ARG_NAME = "name";中为AppetizerRecipe.java指定一个字段，以保持参数的一致性。您可以参考Passing data between Activities了解更多信息。您还需要从AppetizerRecipe.java内部的意图获取数据。@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
ParseObject po = mAppetizers.get(position);
String name = po.getString("appetizer");
// TODO: Get more fields from Parse
Intent intent = new Intent(Appetizer.this, AppetizerRecipe.class);
intent.putExtra(AppetizerRecipe.ARG_NAME, name);
// TODO: Put more extras
startActivity(intent); // TODO: In other activity, get these extras
}
关于android - 从 ListView 检索数据并将其显示在textview/imageview中，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37801339/