启动画面活动单击以打开主活动并替换该活动的片段容器中的片段

Question

我真的很纠结这个问题，所以我花了一天时间寻找解决方案，但运气不好。

我有一个闪屏，其中有一个ImageView与onClickListener，当点击打开我的MainActivity只是很好:

SplashActivity.java

      bookMain.setOnClickListener(new View.OnClickListener() {
       @Override
        public void onClick(View view) {
            Intent intent = new Intent(SplashActivity.this, MainActivity.class);
            startActivity(intent);
            }

然而，我想要实现的是，当按钮被点击，它打开我的MainActivity，但取代的是在MainActivity的fragment_container我有另一个片段(这就是我的底部栏导航的工作方式)。

这是MainActivity中的代码，当导航按钮被点击时，处理碎片的替换，本质上我希望启动屏幕的点击打开"BookFragment"，而不是直接进入"RoomsFragment":

MainActivity.java

public class MainActivity extends AppCompatActivity {
    //STANDARD ON CREATE OPEN TO LOAD INITIAL LAYOUT
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

//THIS CREATES A BLANK CONTAINER FOR EACH FRAGMENT YOU CREATE TO GO IN
    if (findViewById(R.id.fragment_container) != null) {
        // However, if we're being restored from a previous state,
        // then we don't need to do anything and should return or else
        // we could end up with overlapping fragments.
        if (savedInstanceState != null) {
            return;
        }
        // Create a new Fragment to be placed in the activity layout
        RoomsFragment firstFragment = new RoomsFragment();
        // Add the fragment to the 'fragment_container' FrameLayout
        getSupportFragmentManager().beginTransaction()
                .add(R.id.fragment_container, firstFragment).commit();

//THIS CREATES THE NAV BAR AND TELLS WHAT FRAGMENT TO PUT IN THE CONTAINER WHEN A TAB IS SELECTED
        BottomBar bottomBar = (BottomBar) findViewById(R.id.bottomBar);
        bottomBar.setOnTabSelectListener(new OnTabSelectListener() {
            @Override
            public void onTabSelected(@IdRes int tabId) {
                FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
                //TAB1 - THE DEFAULT TAB
                if (tabId == R.id.tab_rooms) {
                    RoomsFragment newFragment = new RoomsFragment();
                    transaction.replace(R.id.fragment_container, newFragment);
                    transaction.addToBackStack(null);
                    transaction.commit();
                    //TAB2
                } else if (tabId == R.id.tab_shisha) {
                    // THIS BIT BELOW IS WHAT CHANGES THE FRAGMENT IN THE CONTAINER
                    ShishaFragment newFragment = new ShishaFragment();
                    transaction.replace(R.id.fragment_container, newFragment);
                    transaction.addToBackStack(null);
                    transaction.commit();
                    //TAB3
                } else if (tabId == R.id.tab_cocktails) {
                    // THIS BIT BELOW IS WHAT CHANGES THE FRAGMENT IN THE CONTAINER
                    CocktailsFragment newFragment = new CocktailsFragment();
                    transaction.replace(R.id.fragment_container, newFragment);
                    transaction.addToBackStack(null);
                    transaction.commit();
                    //TAB4
                } else if (tabId == R.id.tab_food) {
                    // THIS BIT BELOW IS WHAT CHANGES THE FRAGMENT IN THE CONTAINER
                    FoodFragment newFragment = new FoodFragment();
                    transaction.replace(R.id.fragment_container, newFragment);
                    transaction.addToBackStack(null);
                    transaction.commit();
                    //TAB5
                } else if (tabId == R.id.tab_book) {
                    // THIS BIT BELOW IS WHAT CHANGES THE FRAGMENT IN THE CONTAINER
                    BookFragment newFragment = new BookFragment();
                    transaction.replace(R.id.fragment_container, newFragment);
                    transaction.addToBackStack(null);
                    transaction.commit();
                }

            }

        });

纠正工作SplashActivity.java:

在onCreate方法中:

//ONCLICK LISTENER FOR THE ENTER BUTTON AND BOOK BUTTON ON SPLASH PAGE

    Button enterButton = (Button) findViewById(R.id.enter_button);
    enterButton.setOnClickListener(SplashActivity.this);
    Button bookButton = (Button) findViewById(R.id.book_button);
    bookButton.setOnClickListener(SplashActivity.this);
}
public void onClick(View v) {
    Intent intent = new Intent(SplashActivity.this, MainActivity.class);
    switch (v.getId()) {
        case R.id.enter_button:
            startActivity(intent);
            break;
        case R.id.book_button:
            intent.putExtra("source","onClick");
            startActivity(intent);
            break;
        default:
            break;
    }
}

修正MainActivity.java

在onCreate方法中(输入与您相关的底部栏选项卡的位置):

        Intent intent = getIntent();
        String source = intent.getStringExtra("source");
        if (source != null && source.equals("onClick")) {
            bottomBar.selectTabAtPosition(4);
        }

祝你好运!

Answer 1

因为你使用了这个:

getSupportFragmentManager().beginTransaction()
            .add(R.id.fragment_container, firstFragment).commit();

它会显示firstFragment的默认值

你可以试试:

Spalsh Activity

Intent intent = new Intent(SplashActivity.this, MainActivity.class);
startActivity(intent);

为intent添加一些参数

Intent intent = new Intent(SplashActivity.this, MainActivity.class);
intent.putExtra("source","onClick");   //add like this line
startActivity(intent);

Main Activity

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ```your code
    Intent intent = getIntent();
    String source = intent.getStringExtra("source");
    if (source.equals("onClick")) {
        bottomBar.onTabSelected(R.id.tab_book);
    }
}

当Main Activity接收参数source，并且source值是您的设置时，它将运行if