无法解析Toast的maketext()方法 [英] Cannot resolve maketext() method of Toast

问题描述

创建 Toast

Toast toast = Toast.makeText(this, text, duration);

我无法解析 Toast 的 makeText()方法.

我收到此错误

java: no suitable method found for makeText(idtech.ESDN.ShapeData,java.lang.CharSequence,int)
    method android.widget.Toast.makeText(android.content.Context,int,int) is not applicable
      (actual argument idtech.ESDN.ShapeData cannot be converted to android.content.Context by method invocation conversion)
    method android.widget.Toast.makeText(android.content.Context,java.lang.CharSequence,int) is not applicable
      (actual argument idtech.ESDN.ShapeData cannot be converted to android.content.Context by method invocation conversion)

推荐答案

makeText的签名如下

The makeText's signature is the following

public static Toast makeText (Context context, CharSequence text, int duration)

第一个参数必须是上下文对象.您放置了 this ，但是 this 引用了此对象，它可能与 Activity ( Fragment 例如).

the first paramter has to be a context object. You put this, but this refers to this object and it can be something different from an Activity (a Fragment for instance).

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