Question

使用Toast和makeText()方法

时出错

 import android.content.Context;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.RatingBar;
 import android.widget.Toast;

 public class RateME extends Fragment {


public RateME() {
    // Required empty public constructor
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View v= inflater.inflate(R.layout.fragment_rate_me, container, false);
    final RatingBar ratingBar_default = (RatingBar) v.findViewById(R.id.ratingbar_default);
    ratingBar_default.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
        @Override
        public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
         if (rating > 2 )

在这里收到错误我试过了

 Toast toast = Toast.makeText(RateME.this, "Value of:" + String.valueOf(rating), Toast.LENGTH_LONG).show();

并尝试了

Toast toast = new Toast.makeText(RateME.this, "Value of:" + String.valueOf(rating), Toast.LENGTH_LONG).show();


    {
                 Toast.makeText(RateME.this, "Value of:" + String.valueOf(rating), Toast.LENGTH_LONG).show();
             }
                else
             {
                 //Toast.makeText(RateME.this, "here"+String.valueOf(rating),Toast.LENGTH_SHORT).show();
             }
            }
        });

    return v;
    }

 }

这里是logcat

错误：（35,23）错误：找不到合适的方法 makeText（RateME，String，int）方法Toast.makeText（Context，int，int）是不适用（实际参数RateME无法转换为Context 通过方法调用转换）方法 Toast.makeText（Context，CharSequence，int）不适用（实际参数RateME无法通过方法调用转换为Context 转化率）

Answer 1

你需要在片段中使用 getActivity（）而不是 RateME.this

 Toast.makeText(getActivity(), "Value of:" + String.valueOf(rating), Toast.LENGTH_LONG).show();

在片段中尝试这种方式。

Answer 2

在使用片段时尝试此操作：

Toast.makeText(getActivity(), "Value of:" + String.valueOf(rating), Toast.LENGTH_LONG).show();

吐司方法makeText（）没有解决

2 个答案: