Question

在我的设备上运行应用程序并且它在模拟器上运行不正常。页面存储为片段，并使用底部导航栏切换。

public class HomeController extends FragmentActivity implements Serializable {
    private BottomNavigationViewEx navBar;
    private Fragment selectedFragment;
    private HomeFragment homeActivity;
    private OverviewFragment overviewActivity;
    private UploadFragment uploadActivity;
    private ProfileFragment profileActivity;
    private SettingsFragment settingsActivity;

    // Called when the page is created.
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.home_activity);

        // Setup the onclick listener for the bottom
        navBar.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                boolean upload = false;
                // Check if the same tab is not clicked twice.
                if(item.getItemId() != lastNumber){
                    switch (item.getItemId()){
                        case R.id.nav_home:
                            selectedFragment = homeActivity;
                            break;
                        case R.id.nav_overrview:
                            selectedFragment = overviewActivity;
                            break;
                        case R.id.nav_upload:
                            selectedFragment = uploadActivity;
                            upload = true;
                            break;
                        case R.id.nav_profile:
                            selectedFragment = profileActivity;
                            break;
                        case R.id.nav_settings:
                            selectedFragment = settingsActivity;
                            break;
                    }
                    // Set the fragment holder as the selected fragment.
                    FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

                    // Work out what animation to use for the fragment transition.
                    if(upload){
                        transaction.setCustomAnimations(R.anim.push_up_in, R.anim.push_up_out);
                    }else{
                        if((item.getItemId() < lastNumber) && !firstTime){
                            transaction.setCustomAnimations(R.anim.push_right_enter, R.anim.push_right_exit);
                        }else{
                            transaction.setCustomAnimations(R.anim.push_left_enter, R.anim.push_left_exit);
                        }
                        firstTime = false;
                    }
                    lastNumber = item.getItemId();
                    transaction.replace(R.id.fragmentHolder, selectedFragment);
                    transaction.commit();
                    return true;
                }
                return false;
            }
        });

        //Manually displaying the first fragment - one time only
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        transaction.replace(R.id.fragmentHolder, homeActivity);
        transaction.commit();
    }

然后调用文件选择器意图的片段。

public class UploadFragment extends Fragment {
    private void selectFile(){
        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
        intent.setType("*/*");
        startActivityForResult(intent, READ_REQUEST_CODE);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, final Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode == READ_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
            // Check if the data selected is valid.
            if(data != null){
                copyFileForUpload(data);
            }
        }
    }

}

在模拟器上运行时，它可以正常工作并返回正确的片段并调用onActivityResult。当我把它放在我的设备上时，只调用来自家庭控制器的onActivityResult并将片段更改回HomeFragment（默认）。

我试过了：

getActivity（）。startActivityForResult（intent，READ_REQUEST_CODE）;
getParentFragment（）。startActivityForResult（intent，READ_REQUEST_CODE）;

正如我所看到的其他一些帖子所示。

编辑：我还确保我在模拟器和设备上运行相同版本的android。问题仍然存在。

edit2：刚试过另一台设备pixelXL，它工作正常，它只是在我的三星s8上工作。可能是api等级差异s8 =等级24和像素= 27？

任何帮助都会很棒！谢谢！

Answer 1

请在Activity

中添加onActivityResult（）方法

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(upload)
    selectedFragment.onActivityResult(requestCode, resultCode, data);
}

Answer 2

  In the parent Activity class, override the onActivityResult() method and even override the same in the Fragment class and call as the following code.

In the parent class:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.dualPane);
    fragment.onActivityResult(requestCode, resultCode, data);
}

In the child class:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // In fragment class callback
}

onActivityResult没有从设备上的片段调用，但在模拟器上工作正常

2 个答案: