按钮OnClick从活动到特定的选项卡/片段

Question

public class TabbedActivity extends AppCompatActivity {

    TabLayout tabLayoutaa;
    ViewPager2 pager2aa;
    FragmentAdapter adapteraa;
    int value;

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

        tabLayoutaa = findViewById(R.id.tab_layoutaa);
        pager2aa = findViewById(R.id.view_pager2aa);

        FragmentManager fm = getSupportFragmentManager();
        adapteraa = new FragmentAdapter(fm, getLifecycle());
        pager2aa.setAdapter(adapteraa);

        tabLayoutaa.setTabMode(tabLayoutaa.MODE_SCROLLABLE);
        tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 1"));
        tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 2"));
        tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 3"));
        tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 4"));
        tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 5"));
        tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 6"));
        tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 7"));

        tabLayoutaa.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                pager2aa.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });

        pager2ah.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
            @Override
            public void onPageSelected(int position) {
                tabLayoutaa.selectTab(tabLayoutaa.getTabAt(position));
            }
        });
    }
}

public class ButtonList extends AppCompatActivity {


    private Button btntotab1;
    private Button btntotab2;

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

        btntotab1 = (Button)findViewById(R.id.btntotab1);
        btntotab1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                openTab1();
            }
        });
    }

    public void openTab1(){
        Intent intent = new Intent(this, TabbedActivity.class);
        startActivity(intent);
    }
}

Answer 1

首先，将您的按钮ID传递给包含所有选项卡/片段的活动。

buttonlist.java

   public class ButtonList extends AppCompatActivity {
    private Button btntotab1;
    private Button btntotab2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_buttonlist);
    
        btntotab1 = (Button)findViewById(R.id.btntotab1);
        btntotab1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                openTab(1);
            }
        });
       btntotab2 = (Button)findViewById(R.id.btntotab2);
        btntotab2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                openTab(2);
            }
        });
    }
    
    public void openTab(int buttonId){
        Intent intent = new Intent(this, TabbedActivity.class);
        intent.putExtra("button_id",buttonId);
        startActivity(intent);
    }
   }

现在将该按钮ID传递给fragmentManager或您的视页。

 public class TabbedActivity extends AppCompatActivity {

TabLayout tabLayoutaa;
ViewPager2 pager2aa;
FragmentAdapter adapteraa;
int value, buttonId;

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

    tabLayoutaa = findViewById(R.id.tab_layoutaa);
    pager2aa = findViewById(R.id.view_pager2aa);
     buttonId=getIntent().getIntExtra("button_id",0); // to get the button id

    FragmentManager fm = getSupportFragmentManager();
    adapteraa = new FragmentAdapter(fm, getLifecycle());
    pager2aa.setAdapter(adapteraa);
   
    tabLayoutaa.setTabMode(tabLayoutaa.MODE_SCROLLABLE);
    tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 1"));
    tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 2"));
    tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 3"));
    tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 4"));
    tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 5"));
    tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 6"));
    tabLayoutaa.addTab(tabLayoutaa.newTab().setText("Tab 7"));

     pager2aa.setCurrentItem(buttonId-1);  // to get the current Tab

    tabLayoutaa.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            pager2aa.setCurrentItem(tab.getPosition());
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {

        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {

        }
    });

    pager2ah.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
        @Override
        public void onPageSelected(int position) {
            tabLayoutaa.selectTab(tabLayoutaa.getTabAt(position));
        }
    });
}
}