Java tutorial
/* * Copyright (c) 2015 HIQES LLC * * 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 com.hiqes.android.demopermissionsm.ui; import android.content.Context; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.text.method.ScrollingMovementMethod; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import com.hiqes.android.demopermissionsm.R; import com.hiqes.android.demopermissionsm.util.Logger; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; public class ProgLogFragment extends Fragment implements LogLoadDialog.Callbacks { private static final String TAG = ProgLogFragment.class.getSimpleName(); private Button mLoad; private TextView mLoadedLog; public static ProgLogFragment newInstance() { ProgLogFragment fragment = new ProgLogFragment(); return fragment; } public ProgLogFragment() { // Required empty public constructor } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View root; root = inflater.inflate(R.layout.fragment_prog_log, container, false); mLoadedLog = (TextView) root.findViewById(R.id.progress_log); mLoadedLog.setMovementMethod(ScrollingMovementMethod.getInstance()); mLoad = (Button) root.findViewById(R.id.prog_log_load); mLoad.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startLoadDialog(); } }); return root; } @Override public void onResume() { super.onResume(); } private void startLoadDialog() { // Load the dialog to choose which file to load DialogFragment df = new LogLoadDialog(); df.show(getChildFragmentManager(), getString(R.string.prog_load_title)); } public void doLoadFile(String filePath) { String errMsg; Context ctx = getActivity(); try { File inFile = new File(filePath); FileReader reader = new FileReader(inFile); char[] text = new char[(int) inFile.length()]; int readCount = reader.read(text); if (readCount != inFile.length()) { errMsg = ctx.getString(R.string.warn_file_truncated); Toast.makeText(getActivity(), R.string.warn_file_truncated, Toast.LENGTH_LONG).show(); Logger.w(TAG, errMsg); } Logger.d(TAG, "Read contents from log: " + inFile.getName()); reader.close(); mLoadedLog.setText(text, 0, readCount); } catch (FileNotFoundException e) { Logger.e(TAG, "Unable to open file: " + filePath); errMsg = ctx.getString(R.string.err_file_not_found); Toast.makeText(getActivity(), errMsg, Toast.LENGTH_LONG).show(); } catch (IOException e) { Logger.e(TAG, "Failed to read saved file: " + e.getMessage()); errMsg = ctx.getString(R.string.err_file_read); Toast.makeText(getActivity(), errMsg, Toast.LENGTH_LONG).show(); } } @Override public void onFileSelected(String path) { doLoadFile(path); } }