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Merge pull request #539 from gogowitczak/custom-key-length-info

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Modified Spinner values for CreateKeyDialog. Added info for user about custom key length restrictions.
This commit is contained in:
Dominik Schürmann
2014-04-09 00:51:58 +02:00
parent b682cb2ae5 19cab919af
commit e9efd0ec87
4 changed files with 112 additions and 42 deletions
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123
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/CreateKeyDialogFragment.java
View File

@@ -20,6 +20,7 @@ package org.sufficientlysecure.keychain.ui.dialog;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
@@ -37,6 +38,7 @@ import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.util.Choice;
import java.util.ArrayList;
import java.util.Arrays;
public class CreateKeyDialogFragment extends DialogFragment {
@@ -53,6 +55,7 @@ public class CreateKeyDialogFragment extends DialogFragment {
private Spinner mKeySizeSpinner;
private TextView mCustomKeyTextView;
private EditText mCustomKeyEditText;
private TextView mCustomKeyInfoTextView;
public void setOnAlgorithmSelectedListener(OnAlgorithmSelectedListener listener) {
mAlgorithmSelectedListener = listener;
@@ -110,32 +113,16 @@ public class CreateKeyDialogFragment extends DialogFragment {
}
mKeySizeSpinner = (Spinner) view.findViewById(R.id.create_key_size);
ArrayAdapter<CharSequence> keySizeAdapter = ArrayAdapter.createFromResource(
context, R.array.key_size_spinner_values,
android.R.layout.simple_spinner_item);
keySizeAdapter
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// dynamic ArrayAdapter must be created (instead of ArrayAdapter.getFromResource), because it's content may change
ArrayAdapter<CharSequence> keySizeAdapter = new ArrayAdapter<CharSequence>(context, android.R.layout.simple_spinner_item,
new ArrayList<CharSequence>(Arrays.asList(getResources().getStringArray(R.array.rsa_key_size_spinner_values))));
keySizeAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mKeySizeSpinner.setAdapter(keySizeAdapter);
mKeySizeSpinner.setSelection(3); // Default to 4096 for the key length
mKeySizeSpinner.setSelection(1); // Default to 4096 for the key length
mCustomKeyTextView = (TextView) view.findViewById(R.id.custom_key_size_label);
mCustomKeyEditText = (EditText) view.findViewById(R.id.custom_key_size_input);
final AdapterView.OnItemSelectedListener customKeySelectedLisener = new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
final String selectedItemString = (String) parent.getSelectedItem();
final String customLengthString = getResources().getString(R.string.key_size_custom);
final boolean customSelected = customLengthString.equals(selectedItemString);
final int visibility = customSelected ? View.VISIBLE : View.GONE;
mCustomKeyEditText.setVisibility(visibility);
mCustomKeyTextView.setVisibility(visibility);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
};
mCustomKeyInfoTextView = (TextView) view.findViewById(R.id.custom_key_size_info);
dialog.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
@@ -158,20 +145,6 @@ public class CreateKeyDialogFragment extends DialogFragment {
final AlertDialog alertDialog = dialog.create();
final AdapterView.OnItemSelectedListener weakRsaListener = new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if (mKeySizeSpinner == parent) {
customKeySelectedLisener.onItemSelected(parent, view, position, id);
}
setOkButtonAvailability(alertDialog);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
};
mCustomKeyEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
@@ -187,8 +160,31 @@ public class CreateKeyDialogFragment extends DialogFragment {
}
});
mKeySizeSpinner.setOnItemSelectedListener(weakRsaListener);
mAlgorithmSpinner.setOnItemSelectedListener(weakRsaListener);
mKeySizeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
setCustomKeyVisibility();
setOkButtonAvailability(alertDialog);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
mAlgorithmSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
setKeyLengthSpinnerValuesForAlgorithm(((Choice) parent.getSelectedItem()).getId());
setCustomKeyVisibility();
setOkButtonAvailability(alertDialog);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
return alertDialog;
}
@@ -263,4 +259,55 @@ public class CreateKeyDialogFragment extends DialogFragment {
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(properKeyLength > 0);
}
private void setCustomKeyVisibility() {
final String selectedItemString = (String) mKeySizeSpinner.getSelectedItem();
final String customLengthString = getResources().getString(R.string.key_size_custom);
final boolean customSelected = customLengthString.equals(selectedItemString);
final int visibility = customSelected ? View.VISIBLE : View.GONE;
mCustomKeyEditText.setVisibility(visibility);
mCustomKeyTextView.setVisibility(visibility);
mCustomKeyInfoTextView.setVisibility(visibility);
}
private void setKeyLengthSpinnerValuesForAlgorithm(int algorithmId) {
final ArrayAdapter<CharSequence> keySizeAdapter = (ArrayAdapter<CharSequence>) mKeySizeSpinner.getAdapter();
final Object selectedItem = mKeySizeSpinner.getSelectedItem();
keySizeAdapter.clear();
switch (algorithmId) {
case Id.choice.algorithm.rsa:
replaceArrayAdapterContent(keySizeAdapter, R.array.rsa_key_size_spinner_values);
mCustomKeyInfoTextView.setText(getResources().getString(R.string.key_size_custom_info_rsa));
break;
case Id.choice.algorithm.elgamal:
replaceArrayAdapterContent(keySizeAdapter, R.array.elgamal_key_size_spinner_values);
mCustomKeyInfoTextView.setText(""); // ElGamal does not support custom key length
break;
case Id.choice.algorithm.dsa:
replaceArrayAdapterContent(keySizeAdapter, R.array.dsa_key_size_spinner_values);
mCustomKeyInfoTextView.setText(getResources().getString(R.string.key_size_custom_info_dsa));
break;
}
keySizeAdapter.notifyDataSetChanged();
// when switching algorithm, try to select same key length as before
for (int i = 0; i < keySizeAdapter.getCount(); i++) {
if (selectedItem.equals(keySizeAdapter.getItem(i))) {
mKeySizeSpinner.setSelection(i);
break;
}
}
}
private void replaceArrayAdapterContent(ArrayAdapter<CharSequence> arrayAdapter, int stringArrayResourceId) {
final String[] spinnerValuesStringArray = getResources().getStringArray(stringArrayResourceId);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
arrayAdapter.addAll(spinnerValuesStringArray);
} else {
for (final String value : spinnerValuesStringArray) {
arrayAdapter.add(value);
}
}
}
}