java - 如何使用 onClick 方法加载到特定的 Fragment/Viewpager 中？

Question

基本上我有一个名为 ComputerOptions 的 Activity 。在 ComputerOptions 内部有一些按钮，您可以单击这些按钮将您带到选项卡式 Activity 。此 TabbedActivity 具有不同的 fragment ，其中包括一组选项的 ListView 。每次我设置 Intent 时，它只会加载 Tab1 而不会加载到 Tab2 中。我需要使用什么代码，以便如果我单击 ComputerOptions 上的按钮2，它将加载 tab2 和 TabbedActivity 中的 fragment Listview？这是代码和图像。正如你所知，我是 Android 开发的新手，所以任何帮助将不胜感激。

ComputerOptions.java

public class ComputerOptions extends AppCompatActivity {

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



    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    TextView toolTitle = (TextView) findViewById(R.id.toolbar_title);
    toolTitle.setText("Computer");
    toolTitle.setTextColor(Color.parseColor("#FFFFFF"));
    setSupportActionBar(toolbar);


    // add back arrow to toolbar_layout
    if (getSupportActionBar() != null){
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
    }

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // handle arrow click here
    if (item.getItemId() == android.R.id.home) {
        finish(); // close this activity and return to preview activity (if there is any)
    }
    return super.onOptionsItemSelected(item);
}

public void Button1(View view) {
    Intent intent = new Intent(view.getContext(), TabbedActivity.class);
    startActivityForResult(intent, 0);
}

public void Button2(View view) {

    /** I think I do something like this in the intent to load tab2 
    Intent i = new Intent(this, TabbedActivity.class);
    i.putExtra("frgToLoad", 1);
    // Now start your activity
    startActivity(i);
     */
}

}

PageAdapter.java

class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;

public PagerAdapter(FragmentManager fm, int NumOfTabs) {
    super(fm);
    this.mNumOfTabs = NumOfTabs;
}

@Override
public Fragment getItem(int position) {

    switch (position) {
        case 0:
            FragmentOne tab1 = new FragmentOne();
            return tab1;
        case 1:
            FragmentTwo tab2 = new FragmentTwo();
            return tab2;
        case 2:
            FragmentThree tab3 = new FragmentThree();
            return tab3;
        case 3:
            FragmentFour  tab4 = new FragmentFour();
            return tab4;
        case 4:
            FragmentFive tab5 = new FragmentFive();
            return tab5;
        default:
            return null;
    }
}

@Override
public int getCount() {
    return mNumOfTabs;
}

}

Button2.java

public class Button2 extends Fragment {


public Button2() {
    // Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {


    return inflater.inflate(R.layout.tab_fragment_2, container, false);


}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    ListView lv = (ListView)getActivity().findViewById(R.id.listView2);


    String[] values = new String[] { "Ex1", "Ex2", "Ex3",
            "Ex4", "Ex5", "Ex6", "Ex7", "Ex8",
            "Ex9", "Ex10" };
    ArrayAdapter<String> adapter = new ArrayAdapter<>(getActivity(),
            android.R.layout.simple_list_item_1, values);

    lv.setAdapter(adapter);


    // Handles items being clicked
    lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
            if (position == 0) {
                Intent intent = new Intent(getContext(), ComputerOptions.class);
                startActivity(intent);
            }
        }
    }
    );

}

}

Answer 1

试试这个:

在每个按钮单击上传递选项卡位置:

Intent intent = new Intent(view.getContext(), TabbedActivity.class);
final Bundle bundle = new Bundle();
bundle.putString("TabNumber", tab_number);
intent.putExtras(bundle);
startActivity(intent);

现在在 TabbedActivity 中:

 //get tab number
  final Intent intent = getIntent();
        if (intent.hasExtra("TabNumber")) {
            String tab = intent.getExtras().getString("TabNumber");
            Log.e("TabNumberFriendList",tab);
            switchToTab(tab);
        }
 public void switchToTab(String tab){
         if(tab.equals("0")){
             viewPager.setCurrentItem(0);
         }else if(tab.equals("1")){
             viewPager.setCurrentItem(1);
         }else if(tab.equals("2")){
             viewPager.setCurrentItem(2);
         }
     }