Android Camera Intent无法正常工作 - 改为启动图库

时间:2013-05-27 14:35:07

标签: android android-intent camera

我正试图通过意图启动Android camaera,拍照并返回URI。应该非常简单,毕竟有关于如何在SO上执行此操作的负载和负载。

然而,我正在使用带有ICS的星系S3,并发现当我调用相机意图时它会把我带到画廊而不是相机。

这是我尝试过的代码。

首先是一个简单的:

public static final int REQUEST_CODE_CAMERA = 1337;
.
.
. 
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
startActivityForResult(intent, REQUEST_CODE_CAMERA); 

这不起作用。我试过Vogella.com

的例子
private static final int REQUEST_CODE = 1;
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, REQUEST_CODE);

我还读过人们建议不同的请求代码,例如1888,1337和2500.我可以使用基于通用请求代码或框架的静态int吗?或者这些代码是众多SO red herrings之一,因此可以使用任何代码吗?

BTW我知道S3不能与MediaStore.EXTRA_OUTPUT一起使用的错误。我需要的不是这个。我已经知道如何克服这个障碍了。

[编辑]

* *请注意

对于那些阅读此方向的人来说,这可能是一个严重的问题,需要在使用相机意图时注意。虽然启动相机的活动将其方向锁定在清单中。当设备处于纵向模式时,它会在 OnActivityResult 之前和之后调用 OnCreate ;因此擦除了类全局变量。解决方案是通过* onSaveInstanceStat * e方法保存所有类全局变量,并在 OnCreate 中使用这些来重新加载并在视图中显示图像。根据从SO收集到的信息,并非所有设备都会执行此操作,但每台设备的设置一致。我的猜测是活动的内存管理依赖于可用的硬件和Android平台。我真的希望情况并非如此,但Android是Android。

[/编辑]

4 个答案:

答案 0 :(得分:1)

使用相机我使用以下意图:

Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");

答案 1 :(得分:0)

MainActivity.java

public class MainActivity extends Activity {
private static final int CAMERA_REQUEST = 1888; 
private ImageView imageView;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    this.imageView = (ImageView)this.findViewById(R.id.imageView1);
    Button photoButton = (Button) this.findViewById(R.id.button1);
    photoButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
            startActivityForResult(cameraIntent, CAMERA_REQUEST); 
            File imagesFolder = new File(Environment.getExternalStorageDirectory(), "MyCameraImages");
            imagesFolder.mkdirs();   
            File image = new File(imagesFolder, "image.jpg");
            Uri uriSavedImage = Uri.fromFile(image);
            cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, uriSavedImage);

        }
    });
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {  
        Bitmap photo = (Bitmap) data.getExtras().get("data"); 
        imageView.setImageBitmap(photo);        
} 
}
}

activity_main.xml中

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:layout_marginBottom="79dp" />

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="26dp"
    android:text="StartCamera" />

</RelativeLayout>

快照保存在图库中的图像

enter image description here

答案 2 :(得分:0)

android.media.action.IMAGE_CAPTURE

android.provider.MediaStore.ACTION_IMAGE_CAPTURE

是同一件事。变量android.provider.MediaStore.ACTION_IMAGE_CAPTURE 指的是上面的字符串。引用变量而不是字符串的原因是为了确保字符串没有变化。如果字符串改变,android人员也应该改变常量,你应该能够知道你指的是错误的常量,但对于字符串,编译时不会出现错误。  我希望它能够清除。

答案 3 :(得分:0)

从图库中选择照片并拍摄新照片的代码也受SDK 24或更高版本的支持

  

活动

private File filePathImageCamera;
private Uri imagePath;
private static final int IMAGE_GALLERY_REQUEST = 2;
private static final int IMAGE_CAMERA_REQUEST = 3;
private String imageFilePath;

private void selectImage() {


        final CharSequence[] options = {"Take Photo", "Choose from Gallery", "Cancel"};

        AlertDialog.Builder builder = new AlertDialog.Builder(DocumentActivity.this);

        builder.setTitle("Upload Photo!");

        builder.setItems(options, new DialogInterface.OnClickListener() {

            @Override

            public void onClick(DialogInterface dialog, int item) {

                if (options[item].equals("Take Photo")) {
                    photoCameraIntent();
                } else if (options[item].equals("Choose from Gallery")) {
                    photoGalleryIntent();
                } else if (options[item].equals("Cancel")) {
                    dialog.dismiss();
                }

            }

        });

        builder.show();

    }

 private void photoCameraIntent() {

        Intent pictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        Uri uri = null;

        try {
            filePathImageCamera = createImageFile();
        } catch (IOException ex) {
            // Error occurred while creating the File

        }


        if (pictureIntent.resolveActivity(getPackageManager()) != null) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {

                //Create a file to store the image

                if (filePathImageCamera != null) {
                    Uri photoURI = FileProvider.getUriForFile(this, BuildConfig.APPLICATION_ID + ".provider", filePathImageCamera);
                    pictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
                            photoURI);
                    startActivityForResult(pictureIntent,
                            IMAGE_CAMERA_REQUEST);
                }


            } else {


                if (filePathImageCamera != null) {
                    uri = Uri.fromFile(filePathImageCamera);

                    pictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
                    startActivityForResult(pictureIntent, IMAGE_CAMERA_REQUEST);
                }


            }
        }

    }

    private File createImageFile() throws IOException {
        String timeStamp =
                new SimpleDateFormat("yyyyMMdd_HHmmss",
                        Locale.getDefault()).format(new Date());
        String imageFileName = "IMG_" + timeStamp + "_";
        File storageDir =
                getExternalFilesDir(Environment.DIRECTORY_PICTURES);

        // Create the storage directory if it does not exist
        if (!storageDir.exists() && !storageDir.mkdirs()){
            Log.d("error", "failed to create directory");
        }

        File image = File.createTempFile(
                imageFileName,  /* prefix */
                ".jpg",         /* suffix */
                storageDir      /* directory */
        );

        imageFilePath = image.getAbsolutePath();
        return image;
    }

    private void photoGalleryIntent() {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Get Image From"), IMAGE_GALLERY_REQUEST);
    }

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


        if (requestCode == IMAGE_GALLERY_REQUEST) {
            if (resultCode == RESULT_OK) {

                imagePath = data.getData();


                Glide.with(MainActivity.this).load(imagePath).into(imageview);







            }
        } else if (requestCode == IMAGE_CAMERA_REQUEST) {
            if (resultCode == RESULT_OK) {
                if (filePathImageCamera != null && filePathImageCamera.exists()) {

                    imagePath = Uri.fromFile(filePathImageCamera);


                    Glide.with(MainActivity.this).load(imagePath).into(imageview);




                } 
            }
        }

    }
  

清单

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

 <application>

  <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="${applicationId}.provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths" />
        </provider>

</application>
  

在res / xml目录中创建新文件provider_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">

    <external-path name="my_images"
        path="Android/data/your_package_name/files/Pictures" />

</paths>

注意-需要申请许可