以编程方式在Android上用相机拍照

7 回答

• -3

  请看下面的演示代码 .

  这是用于UI的XML文件，

  <?xml version="1.0" encoding="utf-8"?>
  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:orientation="vertical" >
  
      <Button
          android:id="@+id/btnCapture"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="Camera" />
  
  </LinearLayout>
  

  这是你的Java类文件，

  public class CameraDemoActivity extends Activity {
      int TAKE_PHOTO_CODE = 0;
      public static int count = 0;
  
      /** Called when the activity is first created. */
      @Override
      public void onCreate(Bundle savedInstanceState)
      {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
  
          // Here, we are making a folder named picFolder to store
          // pics taken by the camera using this application.
          final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/";
          File newdir = new File(dir);
          newdir.mkdirs();
  
          Button capture = (Button) findViewById(R.id.btnCapture);
          capture.setOnClickListener(new View.OnClickListener() {
              public void onClick(View v) {
  
                  // Here, the counter will be incremented each time, and the
                  // picture taken by camera will be stored as 1.jpg,2.jpg
                  // and likewise.
                  count++;
                  String file = dir+count+".jpg";
                  File newfile = new File(file);
                  try {
                      newfile.createNewFile();
                  }
                  catch (IOException e)
                  {
                  }
  
                  Uri outputFileUri = Uri.fromFile(newfile);
  
                  Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                  cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
  
                  startActivityForResult(cameraIntent, TAKE_PHOTO_CODE);
              }
          });
      }
  
      @Override
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
          super.onActivityResult(requestCode, resultCode, data);
  
          if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK) {
              Log.d("CameraDemo", "Pic saved");
          }
      }
  }
  

  Note:

  在清单文件中指定以下权限，

  <uses-permission android:name="android.permission.CAMERA"/>
  
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
  

  回复于 2024-04-29T05:24:19+08:00
• 1

  拍照有两种方法：

  1 - 使用Intent制作照片

  2 - 使用相机API

  我认为你应该使用第二种方式，其中两种方式有sample code here .

  回复于 2024-04-29T05:24:19+08:00
• 93

  You can use Magical Take Photo library.

  1. try with compile in gradle

  compile 'com.frosquivel:magicaltakephoto:1.0'
  

  2. You need this permission in your manifest.xml

  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.CAMERA"/>
  

  3. instance the class like this

  //“this”是当前的活动参数

  MagicalTakePhoto magicalTakePhoto =  new MagicalTakePhoto(this,ANY_INTEGER_0_TO_4000_FOR_QUALITY);
  

  4. if you need to take picture use the method

  magicalTakePhoto.takePhoto("my_photo_name");
  

  5. if you need to select picture in device, try with the method:

  magicalTakePhoto.selectedPicture("my_header_name");
  

  6. You need to override the method onActivityResult of the activity or fragment like this:

  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
       super.onActivityResult(requestCode, resultCode, data);
       magicalTakePhoto.resultPhoto(requestCode, resultCode, data);
  
       // example to get photo
       // imageView.setImageBitmap(magicalTakePhoto.getMyPhoto());
  }
  

  注意：只有使用此库，您才能在设备中选择图片，这使用最小的API 15 .

  回复于 2024-04-29T05:24:19+08:00
• 28

  对于那些来到这里寻找使用Android的Camera和Camera2 API以编程方式拍摄照片/照片的方法，请查看Google自己提供的开源示例here .

  回复于 2024-04-29T05:24:19+08:00
• -1

  将图像存储在所需的文件夹中

  //Global Variables
     private static final int CAMERA_IMAGE_REQUEST = 101;
      private String imageName;
  

  拍照功能

  public void captureImage() {
  
              // Creating folders for Image
              String imageFolderPath = Environment.getExternalStorageDirectory().toString()
                      + "/AutoFare";
              File imagesFolder = new File(imageFolderPath);
              imagesFolder.mkdirs();
  
              // Generating file name
              imageName = new Date().toString() + ".png";
  
              // Creating image here
              Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
              takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(imageFolderPath, imageName)));
              startActivityForResult(takePictureIntent,
                      CAMERA_IMAGE_REQUEST);
  
          }
  

  广播新图像否则 pic will not be visible in image gallery

  public void onActivityResult(int requestCode, int resultCode, Intent data) {
                  // TODO Auto-generated method stub
                  super.onActivityResult(requestCode, resultCode, data);
  
                  if (resultCode == Activity.RESULT_OK && requestCode == CAMERA_IMAGE_REQUEST) {
  
                      Toast.makeText(getActivity(), "Success",
                              Toast.LENGTH_SHORT).show();
  
   //Scan new image added
                      MediaScannerConnection.scanFile(getActivity(), new String[]{new File(Environment.getExternalStorageDirectory()
                              + "/AutoFare/" + imageName).getPath()}, new String[]{"image/png"}, null);
  
  
   // Work in few phones
                      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
  
                          getActivity().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse(Environment.getExternalStorageDirectory()
                                  + "/AutoFare/" + imageName)));
  
                      } else {
                          getActivity().sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse(Environment.getExternalStorageDirectory()
                                  + "/AutoFare/" + imageName)));
                      }
                  } else {
                      Toast.makeText(getActivity(), "Take Picture Failed or canceled",
                              Toast.LENGTH_SHORT).show();
                  }
              }
  

  权限

  <uses-permission android:name="android.permission.CAMERA" />
      <uses-feature android:name="android.hardware.camera" />
      <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  

  回复于 2024-04-29T05:24:19+08:00
• 4

  以下是打开相机的简单方法：

  private void startCamera() {
  
      Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
      intent.putExtra(MediaStore.EXTRA_OUTPUT,
                      MediaStore.Images.Media.EXTERNAL_CONTENT_URI.getPath());
      startActivityForResult(intent, 1);
  }
  

  回复于 2024-04-29T05:24:19+08:00
• 2

  Intent takePhoto = new Intent("android.media.action.IMAGE_CAPTURE");
  startActivityForResult(takePhoto, CAMERA_PIC_REQUEST)
  

  并设置 CAMERA_PIC_REQUEST= 1 or 0

  回复于 2024-04-29T05:24:19+08:00