Spinner实现联动

<?xml version="1.0" encoding="utf-8"?>

<Spinner
    android:id="@+id/spinner_county"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:entries="@array/cities"/>

<Spinner
    android:id="@+id/spinner_area"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1" />

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

import com.thomas.android.base.R;

public class LinkageSpinnerActivity extends AppCompatActivity {

private Spinner spinner_county,spinner_area;
private ArrayAdapter<CharSequence> areaAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_linkage_spinner);
    spinner_county = findViewById(R.id.spinner_county);
    spinner_area = findViewById(R.id.spinner_area);
    initSpinner();
}

private void initSpinner() {
    final String[][] areaData=new String[][]{
            {"东城","西城","朝阳","大兴"},
            {"黄埔","杨浦","闵行"},
            {"厦一","厦二"}
    };
    areaAdapter = new ArrayAdapter<>(LinkageSpinnerActivity.this,R.layout.support_simple_spinner_dropdown_item);

    spinner_county.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            areaAdapter.clear();
            areaAdapter.addAll(areaData[position]);
            //areaAdapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item);
            spinner_area.setAdapter(areaAdapter);
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });
}

}

来源：CSDN

作者：weixin_46444429

链接：https://blog.csdn.net/weixin_46444429/article/details/104600682