如何修复的方法startActivity（意向）是未定义的类型新View.OnClickListener（）语法错误 [英] How to fix The method startActivity(Intent) is undefined for the type new View.OnClickListener() syntax error

问题描述

我有一个语法错误与我的code，在getView我想使听者按钮更新移动到另一个活动：

I have a syntax errors with my code , in the "getView" I want to make a listener for the button "update" to move to another activity :

@Override
    public View getView(int position, View convertView, ViewGroup parent) {


        LayoutInflater l = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
        View rowView = l.inflate(R.layout.temp, parent, false);
        TextView textView = (TextView) rowView.findViewById(R.id.textView1);
        ImageView imageView = (ImageView) rowView.findViewById(R.id.imageView1);
        Button update = (Button) rowView.findViewById(R.id.button1);

//      update.setOnClickListener(new View.OnClickListener() {
//          
//          @Override
//          public void onClick(View v) {
//
//                 Intent redirect = new Intent(getApplicationContext(),Update.class);
//                 startActivity(redirect);
//              
//          }
//      });




        textView.setText(sa.get(position));


        return rowView;
    }

我试图解决关于意图这些错误，但我失败了:(

I've tried to fix these errors about "Intent" but I failed :(

1. 该方法startActivity（意向）是未定义的类型新View.OnClickListener（）

1. The method startActivity(Intent) is undefined for the type new View.OnClickListener()

该方法getApplicationContext（）是未定义的类型新View.OnClickListener（）

The method getApplicationContext() is undefined for the type new View.OnClickListener()

甚至whene我感动从的onClick这些语句的方法的问题并没有改变！ 我进口的意图库，如何解决????

and even whene I moved these statements from "onClick" method the problem didn't change !! I imported "Intent" library , how to solve that ????

推荐答案

如果您的适配器是在不同的文件，您需要的活动环境。

If your adapter is in a different file you will need activity context.

您需要从活动类传递活动的背景下，以您的适配器的构造。

You need to pass the activity context from your activity class to your adapter constructor.

<一个href="http://developer.android.com/reference/android/content/Context.html#startActivity(android.content.Intent)">http://developer.android.com/reference/android/content/Context.html#startActivity(android.content.Intent)

startActivity 是活动类的方法。所以，你需要的活动范围内展开活动。

startActivity is a method of your activity class. So you need activity context to start the activity.

此外 getApplicationContext 使用活动方面。

<一个href="http://stackoverflow.com/questions/7298731/when-to-call-activity-context-or-application-context">When调用活动上下文或应用程序上下文？

由commonsware检查答案。

Check the answer by commonsware.

     update.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {

            Intent redirect = new Intent(context,Update.class);
            context.startActivity(redirect);    
      }
      });

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