无法解析符号“make text”

Question

我试图在第二个活动中使用makeText（）。但它说“不能reolve symbol'make text”“我尝试将上下文更改为getApplicationContext（）,但没有效果。

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity2 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        String[] Listofmobiles = {"Samsung", "Nokia","IPhone","Oppo","Vivo"};



        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,R.layout.listviewtext,Listofmobiles);
        ListView listView = findViewById(R.id.lvmobile);
        listView.setAdapter(arrayAdapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Toast toast = new Toast.makeText(this,"I will buy",Toast.LENGTH_SHORT);
            }
        });
    }
}

Answer 1

makeText是一个静态方法。这样使用Toast.MakeText()，而不是新建Toast.MakeText()