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按钮 使用匿名内部类 的一些问题
poker_bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//使用整个包名来跳转
Intent intent=new Intent();
//Intent intent=new Intent(MainActivity.this,poker_game.class);
intent.setClassName(this,"com.example.hackertool.poker_game");
//intent.setClassName(MainActivity.this, "com.example.hackertool.poker_game");
startActivities(intent);
}
});
//为什么失败了？
我是初哥，所以 我觉得是不是 在 this的地方 应该用 Mainactivity.this ?
返回的错误信息是：
Error:(39, 17) error: no suitable method found for startActivities(Intent)
method Activity.startActivities(Intent[],Bundle) is not applicable
(actual and formal argument lists differ in length)
method Activity.startActivities(Intent[]) is not applicable
(actual argument Intent cannot be converted to Intent[] by method invocation conversion)
method ContextWrapper.startActivities(Intent[],Bundle) is not applicable
(actual and formal argument lists differ in length)
method ContextWrapper.startActivities(Intent[]) is not applicable
(actual argument Intent cannot be converted to Intent[] by method invocation conversion)
method Context.startActivities(Intent[],Bundle) is not applicable
(actual and formal argument lists differ in length)
method Context.startActivities(Intent[]) is not applicable
(actual argument Intent cannot be converted to Intent[] by method invocation conversion)
@Override
public void onClick(View v) {
//使用整个包名来跳转
Intent intent=new Intent();
//Intent intent=new Intent(MainActivity.this,poker_game.class);
intent.setClassName(this,"com.example.hackertool.poker_game");
//intent.setClassName(MainActivity.this, "com.example.hackertool.poker_game");
startActivities(intent);
}
});
//为什么失败了？
我是初哥，所以 我觉得是不是 在 this的地方 应该用 Mainactivity.this ?
返回的错误信息是：
Error:(39, 17) error: no suitable method found for startActivities(Intent)
method Activity.startActivities(Intent[],Bundle) is not applicable
(actual and formal argument lists differ in length)
method Activity.startActivities(Intent[]) is not applicable
(actual argument Intent cannot be converted to Intent[] by method invocation conversion)
method ContextWrapper.startActivities(Intent[],Bundle) is not applicable
(actual and formal argument lists differ in length)
method ContextWrapper.startActivities(Intent[]) is not applicable
(actual argument Intent cannot be converted to Intent[] by method invocation conversion)
method Context.startActivities(Intent[],Bundle) is not applicable
(actual and formal argument lists differ in length)
method Context.startActivities(Intent[]) is not applicable
(actual argument Intent cannot be converted to Intent[] by method invocation conversion)
...全文
请发表友善的回复…
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Hcwfc 2014-10-02
1、这里的this指的是你的实现的OnClickListener接口的这个类，所以this不行需要像他们说的MainActivity.this才能引用到Activity。
2、建议在跳转Intent的时候做一个检查，这样不会让你的程序崩溃（如果你的手机上没有你要打开的APP）：
Intent intent = new Intent();
if (intent.resolveActivity(getPackageManager()) != null)
{
startActivity(intent);
}svenwang 2014-09-30
应该用MainActivity.this，指明是MainActivity对象。
小妖森 2014-09-30
因为你用的是匿名内部类。所以intent.setClassName(this,"com.example.hackertool.poker_game");中的this指的是这个匿名内部类。
intent.setClassName(MainActivity.this, "com.example.hackertool.poker_game");这样写是正确的。