java - 当焦点从 AutoCompleteTextView 更改为 EditText 时，软键盘不会持续存在

Question

按 AutoCompleteTextView 上软键盘上的下一个按钮(无论是否输入数据)，我尝试将焦点更改到下一个 EditText 并保留软键盘。焦点发生变化，但软键盘消失。我尝试使用 InputMethodManager 但无济于事。我正在做的事情有什么根本不正确的地方吗？

public class AuthorizeLoadActivity extends AppCompatActivity {

TextView operatorNameValue;
ImageButton cameraButton;
TextView ticketNumberValue;
TextView saleNameValue;
Spinner haulerSpinner;
Spinner saleProductSpinner;
Spinner destinationSpinner;
AutoCompleteTextView driverAutoCompleteTextView;
EditText trailerEditText;
Spinner trailerDropSpinner;
Button cancelButton;
Button saveAuthorizationButton;
Button addACommentButton;
String barcodeValue;
ArrayList<SaleObject> savedArrayList;
SaleObject currentSaleObject;
ArrayList<String> haulerNameArrayList = new ArrayList<>();
ArrayList<String> saleProductNameArrayList = new ArrayList<>();
ArrayList<Integer> haulerIDArrayList = new ArrayList<>();
ArrayList<Integer> saleProductIDArrayList = new ArrayList<>();
ArrayList<String> destinationArrayList = new ArrayList<>();
ArrayList<AuthorizationObject> authorizationArrayList = new ArrayList<>();
ArrayList<String> driverArrayList = new ArrayList<>();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_authorizeload);

    //link instance of menu_main
    Toolbar mainToolbar = findViewById(R.id.toolbar);
    setSupportActionBar(mainToolbar);

    //Enable Up Button to return you to home page
    ActionBar actionBar = getSupportActionBar();
    if (actionBar != null) {
        actionBar.setDisplayHomeAsUpEnabled(true);
    }

    barcodeValue = getIntent().getStringExtra("barcodeValue");

    //Link UI to XML
    operatorNameValue = findViewById(R.id.operatorNameValue);
    cameraButton = findViewById(R.id.cameraButton);
    ticketNumberValue = findViewById(R.id.ticketNumberValue);
    saleNameValue = findViewById(R.id.saleNameSpinner);
    haulerSpinner = findViewById(R.id.ticketNumberTextView);
    saleProductSpinner = findViewById(R.id.saleProductSpinner);
    destinationSpinner = findViewById(R.id.buyerSpinner);
    driverAutoCompleteTextView = findViewById(R.id.driverAutoComplete);
    trailerEditText = findViewById(R.id.trailerNumberEditText);
    trailerDropSpinner = findViewById(R.id.trailerDropSpinner);
    cancelButton = findViewById(R.id.cancelButton);
    saveAuthorizationButton = findViewById(R.id.saveLoadButton);
    addACommentButton = findViewById(R.id.addACommentButton);

    //set Security Number Value to barcode information previously collected
    ticketNumberValue.setText(barcodeValue);

    //Reduce EditText/AutoCompleteTextView text sizes if using phone rather than tablet
    boolean tabletSize = getResources().getBoolean(R.bool.isTablet);
    if (!tabletSize) {
        driverAutoCompleteTextView.setTextSize(10);
        trailerEditText.setTextSize(10);
    }

    //Check files for existent drivers and pull them back into an ArrayList
    //Check internal storage for driver data
    try {
        //Set target file to drivers.txt
        File targetFile = new File(getFilesDir(), "drivers.txt");
        //Create new file input stream
        FileInputStream fis = new FileInputStream(targetFile);
        //Create new object input stream, using fis
        ObjectInputStream ois = new ObjectInputStream(fis);
        //write object input stream to object
        //noinspection unchecked
        driverArrayList = (ArrayList<String>) ois.readObject();
        //close object output stream
        ois.close();
        //close file output stream
        fis.close();
    } catch (ClassNotFoundException | IOException e) {
        e.printStackTrace();
    }

    //Setup autoCompleteTextView list with drivers
    ArrayAdapter<String> driverAdapter = new ArrayAdapter<>(this, android.R.layout.simple_dropdown_item_1line, driverArrayList);
    driverAutoCompleteTextView.setAdapter(driverAdapter);

    //show AutoComplete information without having to type first.
    driverAutoCompleteTextView.setOnFocusChangeListener(new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View view, boolean hasFocus) {
            if (hasFocus) {
                driverAutoCompleteTextView.showDropDown();
            } else {
                driverAutoCompleteTextView.dismissDropDown();
            }
        }
    });

    //move to next editText when soft keyboard next button is pressed.
    driverAutoCompleteTextView.setOnKeyListener(new View.OnKeyListener() {

        public boolean onKey(View v, int keyCode, KeyEvent event) {
            // If the event is a key-down event on the "enter" button
            if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
                    (keyCode == KeyEvent.KEYCODE_ENTER)) {
                // remove focus from driverAutoCompleteTextView
                driverAutoCompleteTextView.clearFocus();
                // give focus to trailerEditText
                trailerEditText.setFocusableInTouchMode(true);
                trailerEditText.requestFocus();

                showKeyboard(trailerEditText);

                return true;
            }
            return false;
        }

    });

    //Initiate the barcode reader to replace security number value field
    cameraButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
        }
    });

    cancelButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            finish();
        }
    });

    saveAuthorizationButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (haulerSpinner.getSelectedItemPosition() != 0 && saleProductSpinner.getSelectedItemPosition() != 0 && destinationSpinner.getSelectedItemPosition() != 0 && !driverAutoCompleteTextView.getText().toString().equals("") && !trailerEditText.getText().toString().equals("")) {
                //Get all of the pertinent data
                String currentOperatorID = currentSaleObject.getlbOperatorID();
                String currentSaleName = currentSaleObject.getTimberSaleName();
                Integer currentTimberSaleID = currentSaleObject.getTimberSaleID();
                Integer currentProductID = saleProductIDArrayList.get(saleProductSpinner.getSelectedItemPosition());
                String currentProductName = saleProductNameArrayList.get(saleProductSpinner.getSelectedItemPosition());
                Integer currentHaulerID = haulerIDArrayList.get(haulerSpinner.getSelectedItemPosition());
                String currentHaulerName = haulerNameArrayList.get(haulerSpinner.getSelectedItemPosition());
                String currentDestination = destinationArrayList.get(destinationSpinner.getSelectedItemPosition());
                String currentDriver = driverAutoCompleteTextView.getText().toString();
                String currentTrailerNumber = trailerEditText.getText().toString();
                Boolean currentTrailerDrop = trailerDropSpinner.getSelectedItemPosition() != 0;

                //If new driver, add driver name to drivers.text
                Boolean driverAlreadyExists = false;
                for (int i = 0; i < driverArrayList.size(); i++) {
                    if (driverArrayList.get(i).equals(currentDriver)) {
                        driverAlreadyExists = true;
                    }
                }
                if (!driverAlreadyExists) {
                    //add new driver to driverArrayList
                    driverArrayList.add(currentDriver);

                    //write driver list back to drivers.txt
                    try {
                        //Set target file to drivers.txt
                        File targetFile = new File(getFilesDir(), "drivers.txt");
                        //Create new file output stream
                        FileOutputStream fos = new FileOutputStream(targetFile);
                        //Create new object output stream, using fos
                        ObjectOutputStream oos = new ObjectOutputStream(fos);
                        //write object to object output stream
                        oos.writeObject(driverArrayList);
                        //close object output stream
                        oos.close();
                        //close file output stream
                        fos.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }

                //Get GPS values
                LocationManager mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
                double[] gpsValues = getLastBestLocation(mLocationManager);

                //if GPS data exists...
                if (gpsValues != null) {
                    double currentLatitude = gpsValues[0];
                    double currentLongitude = gpsValues[1];

                    //Create an authorization object with the data
                    AuthorizationObject currentAuthorization = new AuthorizationObject(currentOperatorID, currentTimberSaleID, currentSaleName, currentProductID, currentProductName, currentHaulerID, currentHaulerName, ticketNumberValue.getText().toString(), currentDestination, currentDriver, currentTrailerNumber, currentTrailerDrop, currentLatitude, currentLongitude);

                    //Check files for existent authorizations and pull them back as AuthorizationObjects
                    //Check internal storage for authorization data
                    try {
                        //Set target file to authorizations.txt
                        File targetFile = new File(getFilesDir(), "authorizations.txt");
                        //Create new file input stream
                        FileInputStream fis = new FileInputStream(targetFile);
                        //Create new object input stream, using fis
                        ObjectInputStream ois = new ObjectInputStream(fis);
                        //write object input stream to object
                        //noinspection unchecked
                        authorizationArrayList = (ArrayList<AuthorizationObject>) ois.readObject();
                        //close object output stream
                        ois.close();
                        //close file output stream
                        fis.close();
                    } catch (ClassNotFoundException | IOException e) {
                        e.printStackTrace();
                    }

                    //add authorization to authorizationArrayList
                    authorizationArrayList.add(currentAuthorization);

                    //write authorization list back to authorizations.txt
                    try {
                        //Set target file to authorizations.txt
                        File targetFile = new File(getFilesDir(), "authorizations.txt");
                        //Create new file output stream
                        FileOutputStream fos = new FileOutputStream(targetFile);
                        //Create new object output stream, using fos
                        ObjectOutputStream oos = new ObjectOutputStream(fos);
                        //write object to object output stream
                        oos.writeObject(authorizationArrayList);
                        //close object output stream
                        oos.close();
                        //close file output stream
                        fos.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

                    Intent authorizeLoadToMainIntent = new Intent(AuthorizeLoadActivity.this, MainActivity.class);
                    authorizeLoadToMainIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                    startActivity(authorizeLoadToMainIntent);
                } else {
                    //TODO: Build better GPS permissions thing.
                    Toast.makeText(AuthorizeLoadActivity.this, "Must allow location permissions", Toast.LENGTH_SHORT).show();
                }

            } else {
                //TODO: Build more robust error-handling than just a toast.
                Toast.makeText(AuthorizeLoadActivity.this, "Fill out all fields", Toast.LENGTH_SHORT).show();
            }
        }
    });

    addACommentButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

        }
    });

    //Check internal storage for sale data
    try {
        //Set target file to sales.txt
        File targetFile = new File(getFilesDir(), "sales.txt");
        //Create new file input stream
        FileInputStream fis = new FileInputStream(targetFile);
        //Create new object input stream, using fis
        ObjectInputStream ois = new ObjectInputStream(fis);
        //write object input stream to object
        //noinspection unchecked
        savedArrayList = (ArrayList<SaleObject>) ois.readObject();
        //close object output stream
        ois.close();
        //close file output stream
        fis.close();
    } catch (ClassNotFoundException | IOException e) {
        e.printStackTrace();
    }

    //Start off with non-values in the spinners so I can ensure that users actually interacted with them
    haulerNameArrayList.add("");
    saleProductNameArrayList.add("");
    haulerIDArrayList.add(0);
    saleProductIDArrayList.add(0);
    destinationArrayList.add("");
    //Get range values to check against entered (or scanned) string
    for (int i = 0; i < savedArrayList.size(); i++) {
        ArrayList<RangeObject> currentSaleObjectRanges = savedArrayList.get(i).getRanges();
        for (int j = 0; j < currentSaleObjectRanges.size(); j++) {
            RangeObject currentRange = currentSaleObjectRanges.get(j);
            Integer startValue = currentRange.getStart();
            Integer endValue = currentRange.getEnd();
            //Check if editText string is an Integer
            try {
                Integer editTextInteger = Integer.parseInt(barcodeValue);
                //If it is:
                //If editTextInteger falls between the two of the range:
                if (editTextInteger >= startValue && editTextInteger <= endValue) {
                    currentSaleObject = savedArrayList.get(i);
                    //Set UI elements to correspond with current sale info.
                    operatorNameValue.setText(currentSaleObject.getLbOperatorName());
                    saleNameValue.setText(currentSaleObject.getTimberSaleName());
                    //Create ArrayList for contract objects and get all of their information.
                    //Essentially iterates through all contracts of currentSaleObject and creates an arrayList of contracts.
                    //This (single next line) was auto-generated by Android Studio. Was a for loop.
                    ArrayList<ContractObject> contractArrayList = new ArrayList<>(currentSaleObject.getContract());
                    //iterate through contractArrayList and get the values for the different fields
                    for (int k = 0; k < contractArrayList.size(); k++) {
                        ContractObject currentContract = contractArrayList.get(k);
                        haulerNameArrayList.add(currentContract.getHaulerName());
                        saleProductNameArrayList.add(currentContract.getSaleProductName());
                        haulerIDArrayList.add(currentContract.getHaulerID());
                        saleProductIDArrayList.add(currentContract.getSaleProductID());
                        destinationArrayList.add(currentContract.getDestinationName());
                    }

                    //remove duplicates in each arrayList for spinners
                    HashSet<String> haulerNameHashSet = new HashSet<>(haulerNameArrayList);
                    haulerNameArrayList.clear();
                    haulerNameArrayList.addAll(haulerNameHashSet);

                    HashSet<Integer> haulerIDHashSet = new HashSet<>(haulerIDArrayList);
                    haulerIDArrayList.clear();
                    haulerIDArrayList.addAll(haulerIDHashSet);

                    HashSet<String> productNameHashSet = new HashSet<>(saleProductNameArrayList);
                    saleProductNameArrayList.clear();
                    saleProductNameArrayList.addAll(productNameHashSet);

                    HashSet<Integer> productIDHashSet = new HashSet<>(saleProductIDArrayList);
                    saleProductIDArrayList.clear();
                    saleProductIDArrayList.addAll(productIDHashSet);

                    HashSet<String> destinationHashSet = new HashSet<>(destinationArrayList);
                    destinationArrayList.clear();
                    destinationArrayList.addAll(destinationHashSet);

                    //Set spinner values
                    //set simple adapters for spinners
                    ArrayAdapter<String> haulerSpinnerAdapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item, haulerNameArrayList);
                    haulerSpinner.setAdapter(haulerSpinnerAdapter);

                    ArrayAdapter<String> saleProductSpinnerAdapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item, saleProductNameArrayList);
                    saleProductSpinner.setAdapter(saleProductSpinnerAdapter);

                    ArrayAdapter<String> destinationSpinnerAdapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item, destinationArrayList);
                    destinationSpinner.setAdapter(destinationSpinnerAdapter);

                    //autofill spinner value if only one value is left after removing duplicates.
                    if (haulerNameArrayList.size() == 2) {
                        haulerSpinner.setSelection(1);
                    }
                    if (saleProductNameArrayList.size() == 2) {
                        saleProductSpinner.setSelection(1);
                    }
                    if (destinationArrayList.size() == 2) {
                        destinationSpinner.setSelection(1);
                    }

                }

            } catch (NumberFormatException e) {
                e.printStackTrace();
            }

        }

    }

}

private void showKeyboard(View view) {
    InputMethodManager manager = (InputMethodManager) this.getSystemService(Activity.INPUT_METHOD_SERVICE);

    manager.showSoftInput(view, 0);
}

//add action items to toolbar
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

//add action item functionality
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {

        case R.id.action_filter:
            // User chose the filter item, do stuff...
            return true;

        case R.id.action_first:
            // User chose the first item, do stuff...
            return true;

        case R.id.action_second:
            // User chose the second item, do stuff...
            return true;

        case R.id.action_third:
            // User chose the third item, do stuff...
            return true;

        default:
            // If we got here, the user's action was not recognized.
            // Invoke the superclass to handle it.
            return super.onOptionsItemSelected(item);
    }
}

//Used to bring over scan information from the barcode reader
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
    IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
    if (scanningResult != null) {
        //set scanned data to security number value
        barcodeValue = scanningResult.getContents();
        ticketNumberValue.setText(barcodeValue);

    } else {
        Toast toast = Toast.makeText(getApplicationContext(),
                "No scan data received!", Toast.LENGTH_SHORT);
        toast.show();
    }

}

private double[] getLastBestLocation(LocationManager mLocationManager) {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        // TODO: Consider calling this to handle no GPS permissions
        //    ActivityCompat#requestPermissions
        // here to request the missing permissions, and then overriding
        //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
        //                                          int[] grantResults)
        // to handle the case where the user grants the permission. See the documentation
        // for ActivityCompat#requestPermissions for more details.
        Toast.makeText(this, "You don't have location permissions enabled", Toast.LENGTH_SHORT).show();
        return null;
    } else {
        Location locationGPS = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        Location locationNet = mLocationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

        long GPSLocationTime = 0;
        if (null != locationGPS) {
            GPSLocationTime = locationGPS.getTime();
        }

        long NetLocationTime = 0;

        if (null != locationNet) {
            NetLocationTime = locationNet.getTime();
        }

        if (0 < GPSLocationTime - NetLocationTime) {
            if (locationGPS != null) {
                return new double[]{locationGPS.getLatitude(), locationGPS.getLongitude()};
            } else {
                return null;
                //TODO: Handle nulls, here.
            }
        } else {
            if (locationNet != null) {
                return new double[]{locationNet.getLatitude(), locationNet.getLongitude()};
            } else {
                return null;
                //TODO: Handle nulls, here.
            }
        }
    }
}

}

Answer 1

如果您希望显示软键盘，请执行此操作

driverAutoCompleteTextView.setOnKeyListener(new View.OnKeyListener() {

    public boolean onKey(View v, int keyCode, KeyEvent event) {
        // If the event is a key-down event on the "enter" button
        if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
                (keyCode == KeyEvent.KEYCODE_ENTER))
        {
            // remove focus from driverAutoCompleteTextView
            driverAutoCompleteTextView.clearFocus();
            // give focus to trailerEditText
            trailerEditText.setFocusable(true);
            trailerEditText.setFocusableInTouchMode(true);
            boolean isFocused = trailerEditText.requestFocus();
            Log.d("myTag","isFocused is: "+isFocused);
            Log.d("myTag","driver auto complete text view focused: "+driverAutoCompleteTextView.isFocused());
            showKeyboard(trailerEditText);

            return true;
        }
        return false;
    }
}); 

private void showKeyboard(View view){
    InputMethodManager manager = (InputMethodManager) this.getSystemService(Activity.INPUT_METHOD_SERVICE);

    manager.showSoftInput(view,InputMethodManager.SHOW_IMPLICIT);
}

这虽然又快又脏，但应该可以工作。另外，您应该在 onCreate 方法或 xml 中添加 TrailerEditText.setFocusableInTouchMode(true)。