Android the next day

1. Start with visible activity

protected void OnCreate (Bundle savedinstancestate) {    

    Super.oncreate (savedinstancestate); The OnCreate () method of the parent class was called.

Setcontentview (R.layout.aty_timeline);   //Set layout file.

}

Hide the title bar: Requestwindowfeature (window.feature_no_title), placed in front of Setcontentview (R.layout.aty_timeline).

2. Layout files

Use of 3.Toast

Toast.maketext (Firstactivity.this,r.string.abc,toast.length_long). Show ();

4. Destruction activities, one sentence.
Finish ();
The use of 5.Intent.
Show + implicit

Show:

Intent i = new Intent (atylogin.this,atytimeline.class);

I.putextra (Config.key_token,token);

StartActivity (i);

Gets the value of the intent pass:

Intent data = Getintent ();
msg = Data.getstringextra (config.key_msg);

Implicit: Add category to your profile and find out what you're looking for in your book.

Intent Intent = new Intent (Intent.action_view);
Intent.setdata (Uri.parse ("http://www.baidu.com"));

StartActivity (Intent);
6. Transfer and return data:
Transfer:

Intent Intent = new Intent (atylogin.this,atytimeline.class);

Startactivityforresult (intent,1);
Receive:

Intent Intent = new Intent ();

Intent.putextra ("Data_return", "hello!");

Setresult (result_ok,intent);
This method is important for passing data to the previous activity,Setresult has two parameters, the first is the return processing result,RESULT_OK , or result_canceled. The second parameter is to pass the intent with the data back.
7. The life cycle of the activity: (Be sure to understand, remember in the heart!) ）
OnCreate  
OnStart
Onresume
OnPause
OnStop
OnDestroy
Onrestart

  8. Progress bar

Final ProgressDialog PD = Progressdialog.show (Atymessage.this,getresources (). getString (r.string.connecting), Getresources (). getString (R.string.connecting_to_server));

Pd.dismiss ();

Android the next day