如何传递文件路径，从片段到意图

Question

我想使用蓝牙制作文件传输应用程序，但是选择文件时遇到问题，即所选文件的地址没有出现在我的主活动中。如何获取文件路径？

我已经使用了获取和设置文本，但是我的文件路径未出现在“主要活动”中

StorageFragment.java

File root;
private List<FileInfo> mCurFileInfoList;
private String mCurPath;
private FileItemAdapter mFileItemAdapter;
private PathItemAdapter mFilePathAdapter;
private ProgressDialog dialog;

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mCurFileInfoList = new ArrayList<>();
    root = new File(Environment.getExternalStorageDirectory().getAbsolutePath());
    mCurPath = Environment.getExternalStorageDirectory().getAbsolutePath();

    if (ContextCompat.checkSelfPermission(getContext(), Manifest.permission.READ_EXTERNAL_STORAGE)
            == PackageManager.PERMISSION_GRANTED) {
        loadPathInfo(mCurPath);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        requestPermissions(new String[]
                {Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_READ_EXTERNAL_STORAGE);
    }
}

/**
 *  Method request Permission
 * @param requestCode
 * @param permissions
 * @param grantResults
 */
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                       @NonNull int[] grantResults) {
    if (requestCode == REQUEST_READ_EXTERNAL_STORAGE) {
        if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            loadPathInfo(mCurPath);
        }
    }
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.fragment_storage, null);
    ButterKnife.bind(this, rootView);


    mPathListView.setLayoutManager(new LinearLayoutManager(getContext(), HORIZONTAL, false));
    mPathListView.setAdapter(mFilePathAdapter = new PathItemAdapter(getActivity(), this));

    mStorageListView.setLayoutManager(new LinearLayoutManager(getContext()));
    mStorageListView.setAdapter(mFileItemAdapter = new FileItemAdapter(getActivity(), this, this));
    mSwipeRefresh.setOnRefreshListener(this);
    return rootView;
}

private void loadPathInfo(final String path) {
    mCurFileInfoList.clear();
    Observable.create(new ObservableOnSubscribe<List<FileInfo>>() {
        @Override
        public void subscribe(ObservableEmitter<List<FileInfo>> e) throws Exception {
            mCurFileInfoList = FileUtils.getInfoListFromPath(path);
            e.onNext(mCurFileInfoList);

            e.onComplete();
        }
    }).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread())
            .subscribe(new Consumer<List<FileInfo>>() {
                @Override
                public void accept(List<FileInfo> fileInfos) throws Exception {
                    mFileItemAdapter.setDataList(mCurFileInfoList);
                    mSwipeRefresh.setRefreshing(false);
                    mCurPath = path;
                    mFilePathAdapter.setPathView(mCurPath);
                    mStorageListView.smoothScrollToPosition(0);
                    mPathListView.scrollToPosition(mFilePathAdapter.getItemCount() - 1);
                }
            });
}

@Override
public void onRefresh() {
    loadPathInfo(mCurPath);
}

/**
 * Methode to select file
 * @param v
 */
@Override
public void onClick(View v) {
    Object tag = v.getTag();
    if (tag instanceof String) {
        loadPathInfo((String) tag);
    } else if (tag instanceof FileInfo) {
        FileInfo info = (FileInfo) tag;
        if (info.isFolder()) {
            loadPathInfo(info.getFilePath());
        } else{
            getPathFile(root);
        }
    }
}

public void getPathFile(File f) {
    root = f;
    TextView pathFile = (TextView) mPathListView.findViewById(R.id.path_list_text);
    pathFile.setText(f.getAbsolutePath());
    Intent sendPath = new Intent(this.getActivity(), mainbluetooth.class);
    sendPath.putExtra("pathId", "StorageFragment");
    sendPath.putExtra("1", pathFile.getText().toString());
    startActivityForResult(sendPath, 1990);
}

mainbluetooth.java

public class mainbluetooth extends AppCompatActivity {

@BindView(R.id.file_path)
EditText dataPath;
//Create Objects-------------------------------------------------------
public static final int FILE_REQUEST_CODE = 10;
private static final int DISCOVER_DURATION = 300;
private static final int REQUEST_BLU = 1;
BluetoothAdapter btAdatper = BluetoothAdapter.getDefaultAdapter();

//---------------------------------------------------------------
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_mainbluetooth);
    ButterKnife.bind(this);
}

@OnClick(R.id.Sendblue)
public void sendViaBluetooth() {
    if (!dataPath.equals(null)) {
        if (btAdatper == null) {
            Toast.makeText(this, "Device not support bluetooth", Toast.LENGTH_LONG).show();
        } else {
            enableBluetooth();
        }
    } else {
        Toast.makeText(this, "Please select a file.", Toast.LENGTH_LONG).show();
    }
}

@OnClick(R.id.select_file)
public void btnSelectFile() {
    Intent intent = new Intent(this, StorageActivity.class);
    startActivityForResult(intent, FILE_REQUEST_CODE);
}


//exit to application---------------------------------------------------------------------------
@OnClick(R.id.buttonQuit)
public void Exit() {
    btAdatper.disable();
    Toast.makeText(this, "*** Now Bluetooth is off... Thanks. ***", Toast.LENGTH_LONG).show();
    finish();
}

//Method for send file via bluetooth------------------------------------------------------------

public void enableBluetooth() {
    Intent discoveryIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
    discoveryIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, DISCOVER_DURATION);
    startActivityForResult(discoveryIntent, REQUEST_BLU);
}

//Override method for sending data via bluetooth availability--------------------------
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (resultCode == FILE_REQUEST_CODE) {
            try {
                final String sender =this.getIntent().getExtras().getString("SENDER_KEY");
                if (sender!=null){
                    Intent recievePath = getIntent();
                    String pathSelectFile = recievePath.getStringExtra("1");
                    dataPath.setText(pathSelectFile);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else if (resultCode == DISCOVER_DURATION && requestCode == REQUEST_BLU) {
            Intent i = new Intent();
            i.setAction(Intent.ACTION_SEND);
            i.setType("*/*");
            File file = new File(dataPath.getText().toString());

            i.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));

            PackageManager pm = getPackageManager();
            List<ResolveInfo> list = pm.queryIntentActivities(i, 0);
            if (list.size() > 0) {
                String packageName = null;
                String className = null;
                boolean found = false;

                for (ResolveInfo info : list) {
                    packageName = info.activityInfo.packageName;
                    if (packageName.equals("com.android.bluetooth")) {
                        className = info.activityInfo.name;
                        found = true;
                        break;
                    }
                }
                //CHECK BLUETOOTH available or not------------------------------------------------
                if (!found) {
                    Toast.makeText(this, "Bluetooth not been found", Toast.LENGTH_LONG).show();
                } else {
                    i.setClassName(packageName, className);
                    startActivity(i);
                }
            }
        } else {
            Toast.makeText(this, "Bluetooth is cancelled", Toast.LENGTH_LONG).show();
        }
    }

}
}