Android Studio and genymotion Android start from scratch-1

The life cycle of activity: I don't have a detailed record.
Understanding activity:
Activity components:

Setcontentview set the activity's view to show activity:

Here we comment out the Setcontentview code, and we can see that the interface inside the genymotion becomes blank.

Press F4 here

You can jump to the called R layout file.

Here we try to use our own defined layout file to display:

We define two buttons in the layout of our own definition:

The effect is like this:

We can experiment by calling our layout in mainactivity:

So here we can see the effect:

At the same time we can also be configured in the Androidmanifest file:

To start our custom activity:

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Start a new activity for us to jump,

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This is another aty.

In the main interface we call this code to set the listener event for the button.

  findviewbyid  (R.id.   butstartanotheractivity  ). Setonclicklistener ( Span style= "COLOR: #cc7832" >new view.onclicklistener () {
  @Override 
 public void  Onclick (View v) {
 StartActivity (new intent (Mainactivity. This,anotheraty. Class } 
}) ; 
 }              /span>       

So we move the button-pressing event to another Aty

You can see that we are successful and return to the original activity when the click returns.

To start a page:

startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.baidu.com")));

Use this method to start a page (the default browser is called and automatically returns to the previous page when the page is closed):

Here's a successful jump back.
In the list of recent applications, we can see that we have called the default browser to implement this function.

So, to the end of this, I will continue to update the ~ new Blogger Master all progress together Oh, Sina Weibo: Hong Evil

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Android Studio and genymotion Android start from scratch-1