android开发,我在我的 activity 插入一个按钮,如果andriod market找不到的话就使用 toast进行提示,在使用的时候出现了一些问题,下面的代码报错了 Context cannot be resolved to a variable
1 2 3 4 5 6 7class="java plain">Uri uri = Uri.parse(
"market://details?id="
+ getApplicationContext().getPackageName());
Intent goToMarket =
new
Intent(Intent.ACTION_VIEW, uri);
try
{
startActivity(goToMarket);
}
catch
(ActivityNotFoundException e) {
Toast.makeText(Activity.
this
,
"Couldn't launch the market"
, Toast.LENGTH_LONG).show();
}
我试过如下调用
Toast.makeText(this, "Couldn't launch the market", Toast.LENGTH_LONG).show();
然后开发工具提示 The method makeText(Context, CharSequence, int) in the type Toast is not applicable for the arguments (new View.OnClickListener(){}, String, int)
我以前这么使用没有问题,不明白现在怎么就不行了
你过你继承了Activity,就使用下面的2个方式
Toast.makeText(ClassName.this, "Couldn't launch the market",Toast.LENGTH_LONG).show();
或者
Toast.makeText(getApplicationContext(), "Couldn't launch the market",Toast.LENGTH_LONG).show();
如果你的类继承了 Fragment ,就使用下面的方式
Toast.makeText(getActivity(), "Couldn't launch market",Toast.LENGTH_LONG).show();
原文地址:http://www.itmmd.com/201411/153.html
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