Question

我在每个项目中使用了Navigation drawer我点击了Fragments所以我在这个片段中调用了一个Fragment的一个项目我需要从相机获取图片并将其设置为为canvas background。在这里我拍摄了相机照片，但不知道如何在拍摄后拍摄这张照片并将其设置为画布背景。

片段代码

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");
    }

}

Answer 1

在活动课程中：

@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：

如果您从片段中调用startActivityForResult()，则应致电startActivityForResult()而不是getActivity().startActivityForResult()，因为它会产生片段onActivityResult()。

如果你不确定你在startActivityForResult()打电话的地方以及你将如何调用方法。

选项2：

由于活动获得onActivityResult()的结果，您需要覆盖活动onActivityResult()并调用super.onActivityResult()以传播到相应的片段以获取未处理的结果代码或所有

如果以上两个选项不起作用，请参阅选项3，因为它肯定会有效。

选项3：

从fragment到onActivityResult函数的显式调用如下

在Parent Activity类中，覆盖onActivityResult()方法，甚至覆盖Fragment Class中的相同方法，并调用以下代码。

活动：

@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
}

Answer 2

替换

getActivity().startActivityForResult(intent, CAMERA_DATA);

与

startActivityForResult(intent, CAMERA_DATA);

Answer 3

应该在Activity中实现

onActivityResult ，这堂课是你的片段在FragmentActivity中应用 onActivityResult 。

如何从片段中获取onActivityResult的结果？

3 个答案: