Java tutorial
/* * Copyright 2013 str4d * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package net.i2p.android.wizard.ui; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import net.i2p.android.router.R; import net.i2p.android.router.util.Util; import net.i2p.android.wizard.model.Page; import net.i2p.android.wizard.model.SingleTextFieldPage; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.Fragment; import android.text.Editable; import android.text.TextWatcher; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.inputmethod.InputMethodManager; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class I2PB64DestinationFragment extends Fragment { static final int REQUEST_DESTINATION_FILE = 1; private static final String ARG_KEY = "key"; private PageFragmentCallbacks mCallbacks; private String mKey; private SingleTextFieldPage mPage; protected TextView mFieldView; private TextView mFeedbackView; public static I2PB64DestinationFragment create(String key) { Bundle args = new Bundle(); args.putString(ARG_KEY, key); I2PB64DestinationFragment fragment = new I2PB64DestinationFragment(); fragment.setArguments(args); return fragment; } public I2PB64DestinationFragment() { } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle args = getArguments(); mKey = args.getString(ARG_KEY); mPage = (SingleTextFieldPage) mCallbacks.onGetPage(mKey); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_wizard_page_single_text_field_picker, container, false); ((TextView) rootView.findViewById(android.R.id.title)).setText(mPage.getTitle()); ((TextView) rootView.findViewById(R.id.wizard_text_field_desc)).setText(mPage.getDesc()); Button b = (Button) rootView.findViewById(R.id.wizard_text_field_pick); b.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { Intent i = new Intent(Intent.ACTION_GET_CONTENT); i.setType("text/plain"); i.addCategory(Intent.CATEGORY_OPENABLE); try { startActivityForResult(Intent.createChooser(i, "Select B64 file"), REQUEST_DESTINATION_FILE); } catch (android.content.ActivityNotFoundException ex) { Toast.makeText(getActivity(), "Please install a File Manager.", Toast.LENGTH_SHORT).show(); } } }); mFieldView = ((TextView) rootView.findViewById(R.id.wizard_text_field)); mFieldView.setHint(mPage.getTitle()); if (mPage.getData().getString(Page.SIMPLE_DATA_KEY) != null) mFieldView.setText(mPage.getData().getString(Page.SIMPLE_DATA_KEY)); else if (mPage.getDefault() != null) { mFieldView.setText(mPage.getDefault()); mPage.getData().putString(Page.SIMPLE_DATA_KEY, mPage.getDefault()); } mFeedbackView = (TextView) rootView.findViewById(R.id.wizard_text_field_feedback); return rootView; } @Override public void onAttach(Activity activity) { super.onAttach(activity); if (!(activity instanceof PageFragmentCallbacks)) { throw new ClassCastException("Activity must implement PageFragmentCallbacks"); } mCallbacks = (PageFragmentCallbacks) activity; } @Override public void onDetach() { super.onDetach(); mCallbacks = null; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); mFieldView.addTextChangedListener(new TextWatcher() { public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) { } public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) { } public void afterTextChanged(Editable editable) { mPage.getData().putString(Page.SIMPLE_DATA_KEY, (editable != null) ? editable.toString() : null); mPage.notifyDataChanged(); if (mPage.showFeedback()) { mFeedbackView.setText(mPage.getFeedback()); } } }); } @Override public void setMenuVisibility(boolean menuVisible) { super.setMenuVisibility(menuVisible); // In a future update to the support library, this should override setUserVisibleHint // instead of setMenuVisibility. if (mFieldView != null) { InputMethodManager imm = (InputMethodManager) getActivity() .getSystemService(Context.INPUT_METHOD_SERVICE); if (!menuVisible) { imm.hideSoftInputFromWindow(getView().getWindowToken(), 0); } } } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == REQUEST_DESTINATION_FILE) { if (resultCode == Activity.RESULT_OK) { Uri result = data.getData(); String path = result.getPath(); File file = new File(path); BufferedReader br; try { br = new BufferedReader(new InputStreamReader(new FileInputStream(file))); try { mFieldView.setText(br.readLine()); } catch (IOException ioe) { Util.e("Failed to read B64 file", ioe); Toast.makeText(getActivity(), "Failed to read B64 file.", Toast.LENGTH_SHORT).show(); } } catch (FileNotFoundException fnfe) { Util.e("Could not find B64 file", fnfe); Toast.makeText(getActivity(), "Could not find B64 file.", Toast.LENGTH_SHORT).show(); } } } } }