如何从Fragment中的onActivityResult获取结果? [英] how get Result from onActivityResult in Fragment?

问题描述

我在每个项目中都使用了Navigation drawer，我将其称为Fragments，因此在一个项目中我将该片段称为了一个Fragment，我需要从相机中获取图片并将其设置为canvas background. 在此，我已经捕获了相机图片，但是不知道如何在捕获后获取此图片并将其设置在画布背景上.

I have used Navigation drawer in each item click i have called Fragments so in one item i have called one Fragment in this fragment i need to get picture from camera and set it to as canvas background. In this I have captured camera picture but don't know how to get this picture after captured and set it to on canvas background.

片段代码

Fragment code

import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.app.Fragment;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.Toast;

import com.ssoft.admin.code.SharedPreferenceStore;
import com.ssoft.admin.code.Tools;
import com.ssoft.admin.salesmateco.FragSiteInspectionAdditional;
import com.ssoft.admin.salesmateco.R;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class FragSignature extends Fragment implements View.OnClickListener {
    Button mSIBtnCamera;
    Fragment fragment;
    Tools mTools;
    private static final int RESULT_OK = 1;
    private static final int RESULT_CANCELED = 0;
    Uri imageUri = null;
    final int CAMERA_DATA = 100, INTENT_DATA = 1;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(
                R.layout.frag_site_inspection_signature, null);
        mSIBtnCamera = (Button) rootView.findViewById(R.id.camera);
        mSIBtnCamera.setOnClickListener(this);

        return rootView;
    }

    @Override
    public void onClick(View v) {
        if (v.getId() == R.id.camera) {
            captureImage();
        }

        else {
            Toast.makeText(getActivity().getApplicationContext(),
                    "FragSIPhotos Add Button OnClick", Toast.LENGTH_SHORT)
                    .show();

        }
    }

    public void captureImage() {
        // Define the file-name to save photo taken by Camera activity

        String fileName = "Images.jpg";

        // Create parameters for Intent with filename

        ContentValues values = new ContentValues();

        values.put(MediaStore.Images.Media.TITLE, fileName);

        values.put(MediaStore.Images.Media.DESCRIPTION,
                "Image capture by camera");

        // imageUri is the current activity attribute, define and save it for
        // later usage

        Uri imageUri = getActivity().getApplicationContext()
                .getContentResolver()
                .insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

        /****
         * EXTERNAL_CONTENT_URI : style URI for the "primary" external storage
         * volume.
         ****/

        // Standard Intent action that can be sent to have the camera
        // application capture an image and return it.

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);

        intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, INTENT_DATA);
        Log.e("captureImage()", "state -1");
        getActivity().startActivityForResult(intent, CAMERA_DATA);
        Log.e("captureImage()", "end");

    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.e("OnActivityResult()", "1");

        if (requestCode == CAMERA_DATA) {
            Log.e("OnActivityResult()", "2");

            if (resultCode == RESULT_OK) {
                // Image captured and saved to fileUri specified in the Intent
                Log.e("OnActivityResult()", "3");
            } else if (resultCode == RESULT_CANCELED) {
                // User cancelled the image capture
                Log.e("OnActivityResult()", "4");
            } else {
                // Image capture failed, advise user
                Log.e("OnActivityResult()", "5");
            }
        }
        Log.e("OnActivityResult()", "6");
        super.onActivityResult(requestCode, resultCode, data);
        Log.e("OnActivityResult()", "7");
    }

}

推荐答案

活动类中:

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{

    super.onActivityResult(requestCode,resultCode,data);

}

在片段中:

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data){}

选项1:

如果要从片段中调用startActivityForResult()，则应调用startActivityForResult()而不是getActivity().startActivityForResult()，因为这将导致片段onActivityResult().

If you're calling startActivityForResult() from the fragment then you should call startActivityForResult() not getActivity().startActivityForResult(), as it will result in fragment onActivityResult().

如果不确定在startActivityForResult()上调用的位置以及如何调用方法.

If you're not sure where you're calling on startActivityForResult() and how you will be calling methods.

选项2:

由于活动获取onActivityResult()的结果，因此您将需要覆盖活动的onActivityResult()并调用super.onActivityResult()以传播到未处理的结果代码或所有未处理结果代码的相应片段.

Since Activity gets the result of onActivityResult(), you will need to override the activity's onActivityResult() and call super.onActivityResult()to propagate to the respective fragment for unhandled results codes or for all.

如果上述2个选项不起作用，请参考选项3，因为它肯定会起作用.

If above 2 options do not work, then refer option 3 as it will definitely work.

选项3:

从片段到onActivityResult函数的显式调用如下所示

Explicit call from fragment to onActivityResult function as follows

在父级活动"类中，覆盖onActivityResult()方法，甚至在片段类"中覆盖该方法，并按以下代码进行调用.

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

活动中:

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

在片段中:

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

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