dataBinding使用

package com.test.databinding; import android.os.Bundle; import android.util.SparseArray; import com.test.databinding.databinding.ActivityMain2Binding; import com.test.databinding.databinding.ActivityMainBinding; import java.util.ArrayList; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import androidx.appcompat.app.AppCompatActivity; import androidx.databinding.DataBindingUtil; public class MainActivity2 extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ActivityMain2Binding binding = DataBindingUtil.setContentView(this, R.layout.activity_main2); String[] array={"array1","array2","array3"}; binding.setArray(array); List<String> list=new ArrayList<>(); list.add("list1"); list.add("list2"); list.add("list3"); binding.setList(list); Map<String,String> map=new HashMap<>(); map.put("map的key","map的value"); map.put("map的key1","map的value1"); map.put("map的key2","map的value2"); binding.setMap(map); Set<String> set=new HashSet<>(); set.add("set值1"); set.add("set值2"); set.add("set值3"); binding.setSet(set); SparseArray<String> sparseArray=new SparseArray<>(); sparseArray.put(0,"sparseArrayValue1"); sparseArray.put(1,"sparseArrayValue2"); sparseArray.put(2,"sparseArrayValue3"); binding.setSparse(sparseArray); binding.setIndex(1); binding.setKey("map的key"); } }