[英]how to make infinite loop in android?
我想在代码中做while(true)
,但是,当我运行时,我什么也没看到:我尝试了AsyncTask
但我认为无限循环太重了。
public class openActivity extends AppCompatActivity {
ArrayList<String> myArraylist = new Arraylist<> ();
CustomAdapter myAdapter;
ListView list;
protected void onCreate(Bundle savedInstanceState) {
setContentView(R.layout.myActivity);
list = findViewById(R.id.myList);
try {
while (true) {
Document doc = Jsoup.connect(myUrl).get;
//here i get info i need
//add that info to myArraylist
myAdapter = new CustomAdapter(this, myArraylist);
list.setAdapter(myAdapter);
myAdapter.notifyDataSetChanged();
while (myArrayList.get(0).equals(myArraylist.get(0))) {
Thread.sleep(900000);
}
}
} catch (Exception ex) {
ex.getLocalizeMessage()
}
}
您的循环阻塞了UI线程。 要执行定期任务,您应该使用ScheduledExecutorService 。
另外,请避免在每次迭代时重新创建适配器。 更新现有数据,并使用DiffUtils通知更改。
或者您可以尝试以下方法:
myAdapter = new CustomAdapter(this, myArraylist);
list.setAdapter(myAdapter);
getData();
public void getData(){
Document doc = Jsoup.connect(myUrl).get;
//here i get info i need
//add that info to myArraylist
myAdapter.notifyDataSetChanged();
getData()
}
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