调用位于另一个片段的视图寻呼机索引上的片段的 onActivityResult

Question

我有一个 MainAcitivity，在它上面我有片段 A，其中包含带有两个片段 B 和 C 的视图寻呼机.....Frgamnet B 位于片段 A 中 viewpager 的 0 索引处并包含配置文件部分从图库或相机上传个人资料图片。选择图片时，将调用 main activity 的 onActivity 结果，然后我将其重定向到 viewpager frgamentA 的实例，但我的问题是如何调用主显示的片段 B 的 onActivityResult图片要设置在imageview中？？ MainAcitivity -> frgamentA -> 片段 B

期待肯定的答复..

FRAGMENTB.java......

private void galleryIntent() {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);//
    check="file";
    startActivityForResult(Intent.createChooser(intent, "Select File"), SELECT_FILE);
}

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
      if (check.equalsIgnoreCase("file"))
            onSelectFromGalleryResult(data);
        else if (check.equalsIgnoreCase("camera"))
            onCaptureImageResult(data);
    }
}

主要ACTIVITY.java.

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    Fragment f = getSupportFragmentManager().findFragmentById(R.id.frame);
    if (f instanceof FragmentA) {    //fragement A  is viewpager fragment
        f.onActivityResult(requestCode, resultCode, intent);
    }
}

FRAGMENTA.java.......

public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    getTargetFragment().onActivityResult(requestCode, resultCode, intent);
}

HI 需要调用 FragmentB 的 onActivityResult ??

Answer 1

如果您想在片段中调用 startActivityForResult，您将首先使用 getActivity()。

private void galleryIntent() {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);//
    check="file";
    getActivity().startActivityForResult(Intent.createChooser(intent, "Select File"), SELECT_FILE);

}

Answer 2

您需要使用请求代码调用 startActivityForResult 我已经创建了一个示例，因为它运行良好，试试吧。

Activity 文件

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;

public class ViewPagerActivity extends AppCompatActivity {

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


        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        transaction.replace(R.id.frameContainer, new FragmentA(), "ft");
        transaction.addToBackStack(null);
        transaction.commit();

    }
}

片段A

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import java.util.Objects;

public class FragmentA extends Fragment {


    ViewPager viewPager;
    ViewPagerAdapter viewPagerAdapter;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.frag_a, container, false);
    }


    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        viewPager = view.findViewById(R.id.viewPager);
        viewPagerAdapter = new ViewPagerAdapter(Objects.requireNonNull(getActivity()).getSupportFragmentManager());
        viewPager.setAdapter(viewPagerAdapter);

    }

    public class ViewPagerAdapter extends FragmentStatePagerAdapter {
        private int NUM_ITEMS = 2;

        public ViewPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int i) {
            switch (i) {
                case 0: // Fragment # 0 - This will show FirstFragment
                    return new FragmentB();
                case 1: // Fragment # 0 - This will show FirstFragment different title
                    return new FragmentC();
                default:
                    return null;
            }
        }

        @Override
        public int getCount() {
            return 2;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            switch (position) {
                case 0:
                    return "Frag B";
                case 1:
                    return "Frag C";
            }
            return "Page " + position;
        }
    }
}

片段B

public class FragmentB extends Fragment {


    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.frag_b, container, false);
    }
}

这里是 FragmentC 你调用 startActivityForResult

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class FragmentC extends Fragment {

    Button btnSelect;

    int CAMERA_CODE = 1001;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.frag_c, container, false);
    }


    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        btnSelect = view.findViewById(R.id.btnSelect);


        btnSelect.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent cameraI = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(cameraI, CAMERA_CODE);
            }
        });

    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == CAMERA_CODE) {
            Log.e("got it", "Frag C Got it.");
        }
    }
}

Answer 3

您必须从必须处理 activityResult 的组件调用 startActivityForResult()。

例如：

如果你想处理Activity myAwesomeActivity中的结果：

myAwesomeActivity.startActivityForResult();

如果你想在Fragment myAwesomeFragment

中处理结果

myAwesomeFragment.startActivityForResult();

Answer 4

为此，你最好打电话给

getParentFragment().startActivityForResult(),

然后在该父片段中，您可以实现

 onActivityResult()

并在该方法中将结果传递给子片段，

  childFragment.getParentFragment().onActivityResult(requestCode, resultCode, data)

调用位于另一个片段的视图寻呼机索引上的片段的 onActivityResult

Call onActivityResult of a fragment which is on view pager index of another fragment

android

android-fragments

onactivityresult