[英]How to fill AutoCompleteTextView in Android with an API call?
[英]How to implement autocompletetextview in Android Studio with an API call?
我正在尝试使用Android Studio中的autocompletetextview为用户输入的每个字母提供建议。
每次输入一个字母时,都会调用这样的API调用,
http://dev.markitondemand.com/MODApis/Api/v2/Lookup/json?input=app
http://dev.markitondemand.com/MODApis/Api/v2/Lookup/json?input=appl
http://dev.markitondemand.com/MODApis/Api/v2/Lookup/json?input=apple
从API调用返回的JSON数组填充在建议列表框中。
到目前为止,我得到了像这样的activity_main.xml文件,
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.raam.stockmarketviewer.MainActivity">
<AutoCompleteTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/stocks"
android:hint="@string/hint" />
</RelativeLayout>
在此之后,我应该如何构建MainActivity.java文件以完成自动建议功能?
只需创建一个简单的适配器,并在每次获得结果时更新它
List<String> suggestions = new ArrayList<>();
ArrayAdapter<String> adapter ;
.
.
.
// in your onCreate
autocomplete = (AutoCompleteTextView)findViewById(R.id.stocks);
adapter = new ArrayAdapter<>(this,
android.R.layout.simple_dropdown_item_1line, suggestions);
autocomplete.setAdapter(arrayAdapter);
autocomplete.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
//retrieveData(s);
}
@Override
public void afterTextChanged(Editable s) {
retrieveData(s); //this will call your method every time the user stops typing, if you want to call it for each letter, call it in onTextChanged
}
});
.
.
.
// where you get the data, I suppose in a list
private void retrieveData(String s){
//Do your stuff here with the String s and store the list of your results in the list suggestions
suggestions = yourList;
adapter.notifyDataSetChanged();
}
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