例如,以下是使用异步加载来优化应用程序性能的代码示例:
public class MainActivity extends AppCompatActivity {
private ListView listView;
private ArrayAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = findViewById(R.id.list_view);
adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1);
listView.setAdapter(adapter);
loadData();
}
private void loadData() {
new AsyncTask>() {
@Override
protected List doInBackground(Void... voids) {
// Simulate data loading
SystemClock.sleep(5000);
List data = new ArrayList<>();
for (int i = 0; i < 1000; i++) {
data.add("Item " + (i + 1));
}
return