Question

我正在尝试创建一个将采用图像和显示的Android应用程序它是用户的进一步行动。

这是相机活动。当用户按下上一个活动中的浮动操作按钮时，它将启动。 Camera意图在onCreate本身内触发。

相机动作完美无缺，拍照很好。但它既没有保存在图库中，也没有显示在下面定义的ImageView中。

我正在尝试在ImageView中显示捕获的图像，但相机活动只是移回菜单活动而不显示任何内容。我该如何解决这个问题？

public class Camera extends AppCompatActivity {

public static final String TAG = Camera.class.getSimpleName();
static final int REQUEST_IMAGE_CAPTURE = 1;
private Bitmap mImageBitmap;
private String mCurrentPhotoPath;
private ImageView mImageView = (ImageView)findViewById(R.id.mImageView);


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.camera_layout);



    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (cameraIntent.resolveActivity(getPackageManager()) != null) {
        // Create the File where the photo should go
        File photoFile = null;
        try {
            photoFile = createImageFile();
        } catch (IOException ex) {
            // Error occurred while creating the File
            Log.i(TAG, "IOException");
        }
        // Continue only if the File was successfully created
        if (photoFile != null) {
            cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
            startActivityForResult(cameraIntent, REQUEST_IMAGE_CAPTURE);
        }
    }

}

private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
            imageFileName,  // prefix
            ".jpg",         // suffix
            storageDir      // directory
    );

    // Save a file: path for use with ACTION_VIEW intents
    mCurrentPhotoPath = "file:" + image.getAbsolutePath();
    return image;
}

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

    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        try {
            Log.v("This is totally working", "Yeah!");
            mImageBitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), Uri.parse(mCurrentPhotoPath));
            mImageView.setImageBitmap(mImageBitmap);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

}

这是布局的XML代码

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<ImageView
    android:id="@+id/mImageView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_weight="7" />


</FrameLayout>

Answer 1

在AndroidManifest.xml中添加WRITE_EXTERNAL_STORAGE权限

Answer 2

您可以尝试使用Magical Take Photo库。

<强> 1。用gradle编译

 compile 'com.frosquivel:magicaltakephoto:1.0'

<强> 2。您需要在manifest.xml中使用此权限

<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"/>

第3。像这样的类

//＆＃34;这＆＃34;是当前的活动参数

MagicalTakePhoto magicalTakePhoto =  new MagicalTakePhoto(this,ANY_INTEGER_0_TO_4000_FOR_QUALITY);

<强> 4。如果你需要拍照，请使用方法

magicalTakePhoto.takePhoto("my_photo_name");

<强> 5。如果您需要在设备中选择图片，请尝试使用以下方法：

 magicalTakePhoto.selectedPicture("my_header_name");

<强> 6。您需要覆盖活动或片段的onActivityResult方法，如下所示：

@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，您才可以在设备中选择图片，这将使用最小的API 15。

如何在Android中显示Camera中的图像

2 个答案: