android - 如何将捕获的图像传递给不同的活动以设置为 android 中的图像视图并存储在数据库中

Question

谁能告诉如何将捕获的图像传递给不同的活动以在 android 中设置图像视图并存储在数据库中？有人可以提供代码吗？

谢谢

Answer 1

尝试这个...

1.在onActivityResult()中捕获并获取捕获图像的位图

public void capture(View view) {
    Intent cameraIntent = new Intent(
            android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(cameraIntent, CAPTURE_REQUEST);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        if (requestCode == CAPTURE_REQUEST) {
            Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
        }
    }
}

2 将图像发送到下一个活动...您可以发送位图，因为它实现了 Parcelable

private void sendImage() {
    Intent intent = new Intent(MainActivity.this, NextActivity.class);
    intent.putExtra("image", thumbnail);
    startActivity(intent);
}

3 在NextActivity中获取图片

Bundle extras = getIntent().getExtras();
if (extras != null) {
    Bitmap image = (Bitmap) extras.get("image");
    if (image != null) {
        imageView.setImageBitmap(image);
    }
}

Answer 2

您需要按照以下步骤操作：-

1. 使用相机捕捉图像
2. 保存这张图片
3. 获取文件 URI
4. 在您的下一个活动中，您可以使用该文件 URI 显示此图像

如果您有任何问题，请告诉我。

要将位图保存在 sdcard 中，请使用以下代码

店铺形象

private void storeImage(Bitmap image) {
    File pictureFile = getOutputMediaFile();
    if (pictureFile == null) {
        Log.d(TAG,
                "Error creating media file, check storage permissions: ");// e.getMessage());
        return;
    } 
    try {
        FileOutputStream fos = new FileOutputStream(pictureFile);
        image.compress(Bitmap.CompressFormat.PNG, 90, fos);
        fos.close();
    } catch (FileNotFoundException e) {
        Log.d(TAG, "File not found: " + e.getMessage());
    } catch (IOException e) {
        Log.d(TAG, "Error accessing file: " + e.getMessage());
    }  
}

获取图像存储路径

/** Create a File for saving an image or video */
private  File getOutputMediaFile(){
    // To be safe, you should check that the SDCard is mounted
    // using Environment.getExternalStorageState() before doing this. 
    File mediaStorageDir = new File(Environment.getExternalStorageDirectory()
            + "/Android/data/"
            + getApplicationContext().getPackageName()
            + "/Files"); 

    // This location works best if you want the created images to be shared
    // between applications and persist after your app has been uninstalled.

    // Create the storage directory if it does not exist
    if (! mediaStorageDir.exists()){
        if (! mediaStorageDir.mkdirs()){
            return null;
        }
    } 
    // Create a media file name
    String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmm").format(new Date());
    File mediaFile;
        String mImageName="MI_"+ timeStamp +".jpg";
        mediaFile = new File(mediaStorageDir.getPath() + File.separator + mImageName);  
    return mediaFile;
}