Question

我有一个MainActivity类，是否可以使用Button onclicklistner启动片段类

主要活动类：

public class MainActivity extends AppCompatActivity  {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Button r_btn=(Button) findViewById(R.id.btn_register);
    r_btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent i = new Intent(MainActivity.this, test.class);
            startActivity(i);
        }
    });

片段类

public class test extends Fragment{

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_test, container, false);
    rootView.findViewById(R.id.label1);

    // Inflate the layout for this fragment
    return rootView;
    }
}

任何提示都会有所帮助..

Answer 1

是的，你可以，但你不能处理像活动这样的片段，所以你不能使用startActivity方法。使用片段管理器调用片段

 fragmentContainer = (RelativeLayout) findViewById(R.id.fragmentContainer);

  r_btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
           replaceFragmentInContainer(new test(), fragmentContainer.getId(), getSupportFragmentManager());
        }
    });



 public void replaceFragmentInContainer(Fragment DestinationFragment,int containerResourceID,FragmentManager fragmentManager )
    {
        FragmentTransaction ft=fragmentManager.beginTransaction();
        int viewResourceID = containerResourceID;
        ft.replace(viewResourceID, DestinationFragment);
        ft.commit();
    }

您的容器在活动xml中将处理您的片段

 <RelativeLayout
            android:id="@+id/fragmentContainer"
            android:layout_width="match_parent"
            android:layout_below="@+id/toolbar"
            android:layout_height="match_parent"
            >
        </RelativeLayout>

或者您可以查看this

是否可以从Activity类启动Fragment类。使用Intent

1 个答案: