Question

我尝试使用该法典,从家长活动中开始多项活动:

for (int i=0; i<NUM_ACTIVITIES; i++) 
{
    Intent intent = new Intent(this, MyActivity.class);
    startActivity(intent);
}

然而,根据我在<代码>MyActative.onCreate()上的记录,实际上只创造了1项活动。这些行为是否有望? 如果是的话,发动多重活动的适当途径是什么?

Answer 1

你可以同时开展多项活动。你们是否试图让他们走到一起?

实现这一点的一个途径是开展每一项活动,以便取得结果:

Intent intent = new Intent(this, MyActivity.class);
startActivityForResult(intent, 0);

如果你使用请求书,跟踪活动何时进行。接着,在积极恢复中,你可以开始下一步工作:

protected void  onActivityResult  (int requestCode, int resultCode, Intent  data) {
  if (requestCode < NUM_ACTIVITIES) {
    Intent intent = new Intent(this, MyActivity.class);
    startActivityForResult(intent, requestCode + 1);
  }
}

Edit: If you want to have some of the activities immediatly in the background, you can chain them together by calling startActivity in each Activity s onCreate. If you start a new Activity in onCreate before creating any views, the activity will never be visible.

protected void  onCreate  (Bundle savedInstanceState) {
  int numLeft = getIntent().getIntExtra("numLeft");
  if (numLeft > 0) {
    Intent intent = new Intent(this, MyActivity.class);
    intent.putExtra("numLeft", numLeft - 1);
    startActivity(intent);
  }
}

这应当完成你想要的 st。

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