Java 在Android Studio中从摄像头访问位图图像

我在获取从android studio中的摄像头服务返回的位图图像路径时遇到问题。我当前的代码如下所示：

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

    Bitmap image = (Bitmap) data.getExtras().get("data");
    imageView.setImageBitmap(Bitmap);
}

---

我想用这种方法获取位图图像的路径。

如果要获取

数据

额外数据，则没有路径。那张位图就是全部

如果您想让第三方相机应用程序拍摄全分辨率照片并保存，请在设置

动作图像捕获的
意图时使用
额外输出
：

/***
 Copyright (c) 2008-2016 CommonsWare, LLC
 Licensed under the Apache License, Version 2.0 (the "License"); you may not
 use this file except in compliance with the License. You may obtain a copy
 of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
 by applicable law or agreed to in writing, software distributed under the
 License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
 OF ANY KIND, either express or implied. See the License for the specific
 language governing permissions and limitations under the License.

 From _The Busy Coder's Guide to Android Development_
 https://commonsware.com/Android
 */

package com.commonsware.android.camcon;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import java.io.File;

public class CameraContentDemoActivity extends Activity {
  private static final String EXTRA_FILENAME=
    "com.commonsware.android.camcon.EXTRA_FILENAME";
  private static final String FILENAME="CameraContentDemo.jpeg";
  private static final int CONTENT_REQUEST=1337;
  private File output=null;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    Intent i=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    if (savedInstanceState==null) {
      File dir=
        Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);

      dir.mkdirs();
      output=new File(dir, FILENAME);
    }
    else {
      output=(File)savedInstanceState.getSerializable(EXTRA_FILENAME);
    }

    if (output.exists()) {
      output.delete();
    }

    i.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(output));

    startActivityForResult(i, CONTENT_REQUEST);
  }

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);

    outState.putSerializable(EXTRA_FILENAME, output);
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode,
                                  Intent data) {
    if (requestCode == CONTENT_REQUEST) {
      if (resultCode == RESULT_OK) {
        Intent i=new Intent(Intent.ACTION_VIEW);

        i.setDataAndType(Uri.fromFile(output), "image/jpeg");
        startActivity(i);
        finish();
      }
    }
  }
}

EXTRA\u输出
包含要保存图像的
Uri
。如果一切顺利，第三方相机应用程序将按照说明将图像放在那里，然后您可以在任何需要的地方访问图像。请记住，当摄像头应用程序位于前台时，您的进程可能会终止，因此您需要在某个地方保持路径，就像我在这里保存的实例状态
Bundle
中所做的那样，我创建了一个新类，您在上面用这个CameraContentDemoActivity这样的名称编写了这个新类。我在onActivityResult中遇到了一个问题，无法将数据发送回主活动