Android 用户意图将映像路径发送到另一个活动

有时我会在手机上运行应用程序。问题是，当我在相机拿起照片后单击“确定”按钮时，此时此刻！应用程序'停止运行！事实上，我想看另一个活动的图片！是

拍照：

private void takePhoto() {
    String SDState = Environment.getExternalStorageState();
    if (SDState.equals(Environment.MEDIA_MOUNTED)) {

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        ContentValues values = new ContentValues();
        photoUri = getActivity().getContentResolver().insert(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
        intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, photoUri);
        startActivityForResult(intent, SELECT_PIC_BY_TACK_PHOTO);
        if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
            Toast.makeText(getActivity(), R.string.take_photo_rem,
                    Toast.LENGTH_LONG).show();
        }
    } else {
        Toast.makeText(getActivity(), R.string.takePhoto_msg,
                Toast.LENGTH_LONG).show();
    }
}

相册：

private void pickPhoto() {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(intent, SELECT_PIC_BY_PICK_PHOTO);
}

onActivityResult：用户意图发送图像uri

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == Activity.RESULT_OK) {
        doPhoto(requestCode, data);
    }
    super.onActivityResult(requestCode, resultCode, data);
}

private void doPhoto(int requestCode, Intent data) {

    if (requestCode == SELECT_PIC_BY_PICK_PHOTO) {
        if (data == null) {
            Toast.makeText(getActivity(), R.string.photo_err,
                    Toast.LENGTH_LONG).show();
            return;
        }
        photoUri = data.getData();
        if (photoUri == null) {
            Toast.makeText(getActivity(), R.string.photo_err,
                    Toast.LENGTH_LONG).show();
            return;
        }
    }
    String[] pojo = { MediaStore.Images.Media.DATA };
    Cursor cursor = getActivity().managedQuery(photoUri, pojo, null, null,
            null);
    if (cursor != null) {
        int columnIndex = cursor.getColumnIndexOrThrow(pojo[0]);
        cursor.moveToFirst();
        picPath = cursor.getString(columnIndex);
        try {
            if (Integer.parseInt(Build.VERSION.SDK) < 14) {

                cursor.close();
            }
        } catch (Exception e) {
            Log.e(TAG, "error:" + e);
        }
    }
    Log.i(TAG, "imagePath = " + picPath);
    if (picPath != null) {

        Intent startEx = new Intent(getActivity(), PhotoPre.class);
        Bundle bundle = new Bundle();
        bundle.putString(SAVED_IMAGE_DIR_PATH, picPath);
        startEx.putExtras(bundle);
        startActivity(startEx);

    } else {
        Toast.makeText(getActivity(), R.string.photo_err, Toast.LENGTH_LONG)
                .show();

    }

}

---

1-启动照相机拍摄图像

Intent cameraIntent = new Intent( android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
File imagesFolder = new File(Environment .getExternalStorageDirectory(), "MyImages");
imagesFolder.mkdirs();
File image = new File(imagesFolder, Const.dbSrNo + "image.jpg");
Uri uriSavedImage = Uri.fromFile(image);   
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, uriSavedImage); 
startActivityForResult(cameraIntent, CAMERA_REQUEST);

2-在“onActivityResult”中编写以下代码

3-生成一个java文件Const.java

public class Const {
    public static byte[] imgbyte = "";
}  

4-现在使用在活动中显示该图像

byte[] mybits=Const.imgbyte;
BitmapFactory.Options options = new BitmapFactory.Options();
Bitmap bitmap = BitmapFactory.decodeByteArray(mybits, 0, mybits.length, options);
yourImageview.setImageBitmap(bitmap);

---

检查您的extras键值变量

SAVED_IMAGE_DIR_PATH

和

key_PHOTO_PATH

是否相同，关闭应用程序时出现了什么错误…？请同时发布错误。它很可能是一个空指针。请发布日志，并说明错误发生在哪一行。由于此处没有行，请告诉出现错误的代码Saved_IMAGE_DIR_PATH和KEY_PHOTO_PATH都是不同的参数beteew activity！这段代码完全没有问题吗？我的应用程序的logcat:

java.lang.RuntimeException:无法恢复活动{com.example.newpingziyi/com.example.newpingziyi.MainActivity}:java.lang.RuntimeException:无法将结果ResultInfo{who=null，request=131073，result=-1，data=null}传递到活动{com.example.newpingziyi/com.example.newpingziyi.MainActivity}:java.lang.NullPointerException

您是否尝试过上述代码？？使用Const.java文件将图像字节传输到其他活动？我不是，那些朋友想查看日志，所以…，现在我启动itConst.dbSrNo！**dbSrNo**bitmap bm BitmapFactory.decodeFile是什么(“在这里你可以写下你的图像路径”）……这是我的图像路径。

public class Const {
    public static byte[] imgbyte = "";
}  

byte[] mybits=Const.imgbyte;
BitmapFactory.Options options = new BitmapFactory.Options();
Bitmap bitmap = BitmapFactory.decodeByteArray(mybits, 0, mybits.length, options);
yourImageview.setImageBitmap(bitmap);