Question

我正在构建一个应用程序以使用相机拍照，但我不知道我可以将我的应用程序的照片保存在avd android（我的AVD：Nexus 5X API 26 Android 8.0）的sd卡上。我拍了照片，并在应用程序中显示了照片，但在为应用程序创建的文件夹中（在SDCard中）找不到该照片。谢谢。

Answer 1

首先在清单中添加权限：

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

，因此您需要获取Bitmap。您可以尝试从ImageView获取它，例如：

BitmapDrawable drawable = (BitmapDrawable) mImageView1.getDrawable();
Bitmap bitmap = drawable.getBitmap();

您必须从SD卡进入目录

    File sdCardDirectory = Environment.getExternalStorageDirectory();
// Next, create your specific file for image storage:

    File image = new File(sdCardDirectory, "test.png");
//After that, you just have to write the Bitmap :

    boolean success = false;

    // Encode the file as a PNG image.
    FileOutputStream outStream;
    try {

        outStream = new FileOutputStream(image);
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream); 
        /* 100 to keep full quality of the image */

        outStream.flush();
        outStream.close();
        success = true;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    if (success) {
        Toast.makeText(getApplicationContext(), "Image saved with success",
                Toast.LENGTH_LONG).show();
    } else {
        Toast.makeText(getApplicationContext(),
                "Error during image saving", Toast.LENGTH_LONG).show();
    }

我可以将Android应用程序的照片保存在SD卡上吗？

1 个答案: