用相机意图拍照并保存到文件

Question

可能重复:
Android Camera - 将图像保存到SD卡中的新文件夹中

我正在尝试拍照并将其保存到文件中.问题出现了我试图将位图保存到文件.这是我的代码:

private void takePic() {
    Intent cameraIntent = new Intent(
            android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(cameraIntent, 2);


}

public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 2) {
            Bitmap photo = (Bitmap) data.getExtras().get("data");
            ImageView test = (ImageView) findViewById(R.id.test);
            test.setImageBitmap(photo);

            try {
                FileOutputStream out = new FileOutputStream("filename");
                photo.compress(Bitmap.CompressFormat.JPEG, 90, out);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

和logcat中的例外:

04-02 14:46:51.975: W/IInputConnectionWrapper(2225): showStatusIcon on inactive InputConnection
04-02 14:46:56.135: W/System.err(2225): java.io.FileNotFoundException: /filename (Read-only file system)
04-02 14:46:56.135: W/System.err(2225):     at org.apache.harmony.luni.platform.OSFileSystem.open(Native Method)
04-02 14:46:56.145: W/System.err(2225):     at dalvik.system.BlockGuard$WrappedFileSystem.open(BlockGuard.java:232)
04-02 14:46:56.145: W/System.err(2225):     at java.io.FileOutputStream.<init>(FileOutputStream.java:94)
04-02 14:46:56.145: W/System.err(2225):     at java.io.FileOutputStream.<init>(FileOutputStream.java:165)
04-02 14:46:56.145: W/System.err(2225):     at java.io.FileOutputStream.<init>(FileOutputStream.java:144)

Answer 1

以下代码是您的问题的解决方案之一::

static Uri capturedImageUri = null;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.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) {
            Calendar cal = Calendar.getInstance();
            File file = new File(Environment.getExternalStorageDirectory(), (cal.getTimeInMillis() + ".jpg"));
            if (!file.exists()) {
                try {
                    file.createNewFile();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            } else {
                file.delete();
                try {
                    file.createNewFile();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            capturedImageUri = Uri.fromFile(file);
            Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            i.putExtra(MediaStore.EXTRA_OUTPUT, capturedImageUri);
            startActivityForResult(i, CAMERA_RESULT);
        }
    });
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == CAMERA_REQUEST) {
            //Bitmap photo = (Bitmap) data.getExtras().get("data");
            //imageView.setImageBitmap(photo);
            try {
                Bitmap bitmap = MediaStore.Images.Media.getBitmap(getApplicationContext().getContentResolver(), capturedImageUri);
                imageView.setImageBitmap(bitmap);
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

Answer 2

你的错误清楚地表明了这一点java.io.FileNotFoundException: /filename

请提供确切的路径“/sdcard/文件名”

new FileOutputStream(getExternalStorageDirectory()+"filename");

或者

String imageFilePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/name.png";

注意：在清单文件中添加权限 WRITE_EXTERNAL_STORAGE 。