[Android] Create a tab with fragment, androidfragment

[Android] Create a tab with fragment, androidfragment

Interface layout, linear layout, horizontal arrangement, and average center Distribution

Four textviews, 0 dip in width, 1 in weight, and center content

Use the LinearLayout control to set the id of the subject content.

 

Creates four Fragment Option Classes that inherit the Fragment class of the system.

Override onCreateView () to return a View object

 

Create four layout files to display the content of the tab

 

In activity

Obtain the LinearLayout object by using the findViewById () method.

First, find the four TextView control objects.

Call the setOnClickListener () method of the four TextView objects and set the click event. Parameter: this

The current activity implements the OnClickLisntenr interface, implements the onClick () method, and passes it to the View object.

 

Set the default Interface

Get the FragmentManager object by using the getFragmentManager () method

Call the beginTransaction () method of the FragmentManager object to start the transaction and obtain the FragmentTransaction object.

Call the replace () method of the FragmentTransaction object and replace the current interface with Fragment. Parameter: containerViewId, the first Fragment object

ContainerViewId is the container id, which is the id of the content body we define

Call the commit () method of the FragmentTransaction object to submit the transaction.

 

In The onClick () method

Call the getId () method of the View object to obtain the id of the currently clicked control.

Switch determines the id and displays different fragment based on different IDs.

 

In the replace () method of the FragmentTransaction object, parameter 1 must be a container object. I use TextView to report an exception in type conversion. The LinearLayout control must have a subcontrol.

 

No animation effect currently

 

Package com. tsh. mytabfrag; import android. app. activity; import android. app. fragment; import android. app. fragmentManager; import android. app. fragmentTransaction; import android. OS. bundle; import android. view. view; import android. view. view. onClickListener; import android. widget. textView; public class MainActivity extends Activity implements OnClickListener {private TextView tv1, tv2, tv3; private FragmentManager fm; private FragmentTransaction ft; private Fragment fm1, fm2, fm3; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); // initialize the control tv1 = (TextView) findViewById (R. id. tv1); tv2 = (TextView) findViewById (R. id. tv2); tv3 = (TextView) findViewById (R. id. tv3); fm1 = new Fragment1 (); fm2 = new Fragment2 (); fm3 = new Fragment3 (); tv1.setOnClickListener (this); tv2.setOnClickListener (this); tv3.setOnClickListener (this ); fm = getFragmentManager (); ft = fm. beginTransaction (); ft. replace (R. id. content, fm1); ft. commit () ;}@ Override public void onClick (View v) {ft = fm. beginTransaction (); switch (v. getId () {case R. id. tv1: ft. replace (R. id. content, fm1); break; case R. id. tv2: ft. replace (R. id. content, fm2); break; case R. id. tv3: ft. replace (R. id. content, fm3); break; default: break;} ft. commit ();}}