Question

即使我决定不拍摄图像并按下后退按钮退出相机屏幕，也会在图库中生成并存储“空图像”？有没有办法在MainActivity.java中消除这个连续的“空白图像”问题而不在我的库中的CameraPhoto类中进行编辑？感谢

MainActivity.java

        CameraPicture cameraPhoto = new CameraPicture(getApplicationContext());
                Camera.setOnClickListener(new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {

                                try {
                                    startActivityForResult(cameraPhoto.takePhotoIntent(), CAMERA_REQUEST);

                                    cameraPhoto.addToGallery();
                                }

                                catch (IOException e) {
                                    Toast.makeText(getApplicationContext(), "Error", Toast.LENGTH_SHORT).show();
                                }
                            }
                        });
    @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            if(resultCode == RESULT_OK){
                if(requestCode == CAMERA_REQUEST){
                    String photoPath = cameraPhoto.getPhotoPath();
                    selectedPhoto = photoPath;
                    Bitmap bitmap = null;
                    try {
                        bitmap = ImageLoader.init().from(photoPath).requestSize(512, 512).getBitmap();
                        ivImage.setImageBitmap(getRotatedBitmap(bitmap,90));


                    } catch (FileNotFoundException e) {
                        Toast.makeText(getApplicationContext(),"Something Wrong while loading the photo!", Toast.LENGTH_SHORT).show();
                    }
                }
}

编辑：创建另一个名为CameraPicture的java类来托管更新的推荐代码，而不是从库CameraPhoto .jar文件中调用以防止冲突。

import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class CameraPicture {
    private String photoPath;
    private Context context;

    public String getPhotoPath() {
        return this.photoPath;
    }

    public CameraPicture(Context context) {
        this.context = context;
    }

    public Intent takePhotoIntent() throws IOException {
        Intent in = new Intent("android.media.action.IMAGE_CAPTURE");
        if(in.resolveActivity(this.context.getPackageManager()) != null) {
            File photoFile = this.createImageFileName();
            if(photoFile != null) {
                in.putExtra("output", Uri.fromFile(photoFile));
            }
        }

        return in;
    }

    private File createImageFileName() throws IOException {
        String timeStamp = (new SimpleDateFormat("yyyyMMdd_HHmmss")).format(new Date());
        String imageFileName = "JPEG_" + timeStamp + "_";
        File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
        File image = new File ( storageDir + "/" + imageFileName + ".jpg");
        this.photoPath = image.getAbsolutePath();
        return image;
    }

    public void addToGallery() {
        Intent mediaScanIntent = new Intent("android.intent.action.MEDIA_SCANNER_SCAN_FILE");
        File f = new File(this.photoPath);
        Uri contentUri = Uri.fromFile(f);
        mediaScanIntent.setData(contentUri);
        this.context.sendBroadcast(mediaScanIntent);
    }
}

Answer 1

cameraPhoto.addToGallery();

OMG。你在点击监听器中调用它。非常错误的地方。您应该只在onActivityResult()中执行此操作。

拍照后才拍照。

说完我发现功能名称错了。您没有向Gallery添加任何内容，因为没有Gallery。只有一个图库应用程序。并且通常有更多的图库应用程序。您正在将文件添加到MediaStore。 Gallery和Fotos应用程序在MediaStore中查询图像。

照片库一直生成“空白图像”？

1 个答案: