Java tutorial
/* * Copyright (C) 2014 Simple Explorer * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301, USA. */ package com.dnielfe.manager.dialogs; import java.io.File; import java.lang.ref.WeakReference; import java.text.DateFormat; import org.jetbrains.annotations.NotNull; import com.dnielfe.manager.R; import org.apache.commons.io.FileUtils; import com.dnielfe.manager.commands.Permissions; import com.dnielfe.manager.commands.RootCommands; import com.dnielfe.manager.utils.SimpleUtils; import com.dnielfe.manager.utils.MD5Checksum; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.app.DialogFragment; import android.content.Context; import android.content.DialogInterface; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.CompoundButton; import android.widget.TextView; import android.widget.Toast; public final class FilePropertiesDialog extends DialogFragment { private Activity activity; private static File mFile; private PropertiesAdapter mAdapter; public static DialogFragment instantiate(File file) { mFile = file; final FilePropertiesDialog dialog = new FilePropertiesDialog(); return dialog; } @Override public Dialog onCreateDialog(Bundle state) { activity = getActivity(); final AlertDialog.Builder builder = new AlertDialog.Builder(activity); mAdapter = new PropertiesAdapter(activity, mFile); builder.setTitle(mFile.getName()); builder.setNeutralButton(R.string.cancel, null); builder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { final FilePermissionsPagerItem fragment = (FilePermissionsPagerItem) mAdapter.getItem(1); fragment.applyPermissions(getActivity()); } }); final View content = activity.getLayoutInflater().inflate(R.layout.dialog_properties_container, null); this.initView(content); builder.setView(content); final AlertDialog dialog = builder.create(); dialog.setOnShowListener(new DialogInterface.OnShowListener() { @Override public void onShow(final DialogInterface dialog) { ((AlertDialog) dialog).getButton(DialogInterface.BUTTON_POSITIVE).setVisibility(View.GONE); } }); return dialog; } private void initView(@NotNull final View view) { final ViewPager pager = (ViewPager) view.findViewById(R.id.tabsContainer); pager.setAdapter(mAdapter); final CompoundButton tab1 = (CompoundButton) view.findViewById(R.id.tab1); final CompoundButton tab2 = (CompoundButton) view.findViewById(R.id.tab2); pager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { tab1.setChecked(position == 0); tab2.setChecked(position == 1); ((AlertDialog) getDialog()).getButton(DialogInterface.BUTTON_POSITIVE).setVisibility( position == 0 || !((FilePermissionsPagerItem) mAdapter.getItem(1)).areBoxesEnabled() ? View.GONE : View.VISIBLE); } }); tab1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { tab1.setChecked(true); tab2.setChecked(false); pager.setCurrentItem(0); } }); tab2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { tab2.setChecked(true); tab1.setChecked(false); pager.setCurrentItem(1); } }); } @Override public void onStart() { super.onStart(); mAdapter.onStart(); } @Override public void onStop() { super.onStop(); mAdapter.onStop(); } private interface PagerItem { void onStart(); void onStop(); @NotNull View onCreateView(@NotNull LayoutInflater inflater); } private static final class PropertiesAdapter extends PagerAdapter { private final LayoutInflater mLayoutInflater; private final File mFile; private final PagerItem[] mItems; private PropertiesAdapter(@NotNull final Activity context, @NotNull final File file) { mLayoutInflater = context.getLayoutInflater(); mFile = file; mItems = new PagerItem[] { new FilePropertiesPagerItem(mFile), new FilePermissionsPagerItem(mFile) }; } void onStart() { for (final PagerItem item : mItems) { item.onStart(); } } void onStop() { for (final PagerItem item : mItems) { item.onStop(); } } @NotNull PagerItem getItem(final int position) { return mItems[position]; } @Override public Object instantiateItem(final ViewGroup container, final int position) { final PagerItem item = mItems[position]; final View view = item.onCreateView(mLayoutInflater); container.addView(view); item.onStart(); return view; } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } @Override public int getCount() { return mItems.length; } @Override public boolean isViewFromObject(View view, Object object) { return view == object; } } private static final class FilePropertiesPagerItem implements PagerItem { private File file3; private TextView mPathLabel, mTimeLabel, mSizeLabel, mMD5Label; private View mView; private LoadFsTask mTask; private FilePropertiesPagerItem(File file) { this.file3 = file; } @NotNull @Override public View onCreateView(@NotNull final LayoutInflater inflater) { mView = inflater.inflate(R.layout.dialog_properties, null); initView(mView); return mView; } @Override public void onStart() { if (mView != null) { if (mTask == null) { mTask = new LoadFsTask(); mTask.execute(mFile); } } } @Override public void onStop() { if (mTask != null && mTask.getStatus() == AsyncTask.Status.RUNNING) { mTask.cancel(true); } } private void initView(View table) { this.mPathLabel = (TextView) mView.findViewById(R.id.path_label); this.mTimeLabel = (TextView) mView.findViewById(R.id.time_stamp); this.mSizeLabel = (TextView) mView.findViewById(R.id.total_size); this.mMD5Label = (TextView) mView.findViewById(R.id.md5_summary); } private final class LoadFsTask extends AsyncTask<File, Void, String> { private String mDisplaySize; private long size = 0; @Override protected void onPreExecute() { mPathLabel.setText(file3.getAbsolutePath()); mTimeLabel.setText("..."); mSizeLabel.setText("..."); mMD5Label.setText("..."); } @Override protected String doInBackground(final File... params) { DateFormat df = DateFormat.getDateTimeInstance(); mTimeLabel.setText(df.format(file3.lastModified())); if (!file3.canRead()) { mDisplaySize = "---"; return mDisplaySize; } else if (file3.isFile()) { size = file3.length(); } else { size = SimpleUtils.getDirSize(file3); } mDisplaySize = FileUtils.byteCountToDisplaySize(size); return mDisplaySize; } @Override protected void onPostExecute(final String result) { mSizeLabel.setText(result); if (file3.isFile()) { try { mMD5Label.setText(MD5Checksum.getMD5Checksum(file3.getPath())); } catch (Exception e) { e.printStackTrace(); } } else { mMD5Label.setText("-"); } } } } private static final class FilePermissionsPagerItem implements PagerItem, CompoundButton.OnCheckedChangeListener { /** * Permissions that file had when FilePermissionsController was created */ private Permissions mInputPermissions = null; /** * Currently modified permissions */ private Permissions mModifiedPermissions = null; /** * User: read, write, execute */ private CompoundButton ur = null; private CompoundButton uw = null; private CompoundButton ux = null; /** * Group: read, write, execute */ private CompoundButton gr = null; private CompoundButton gw = null; private CompoundButton gx = null; /** * Others: read, write, execute */ private CompoundButton or = null; private CompoundButton ow = null; private CompoundButton ox = null; private final File mFile; private View mView; private TextView mOwner; private LoadFsTask mTask; private TextView mGroup; private Permissions mPermission; private FilePermissionsPagerItem(final File file) { mFile = file; } @NotNull @Override public View onCreateView(@NotNull final LayoutInflater inflater) { mView = inflater.inflate(R.layout.dialog_permissions, null); initView(mView); return mView; } @Override public void onStart() { if (mView != null) { if (mTask == null) { mTask = new LoadFsTask(this); } if (mTask.getStatus() != AsyncTask.Status.RUNNING) { mTask.execute(mFile); } } } @Override public void onStop() { if (mTask != null && mTask.getStatus() == AsyncTask.Status.RUNNING) { mTask.cancel(false); } } private void initView(View table) { this.mOwner = (TextView) mView.findViewById(R.id.owner); this.mGroup = (TextView) mView.findViewById(R.id.group); this.ur = (CompoundButton) mView.findViewById(R.id.uread); this.uw = (CompoundButton) mView.findViewById(R.id.uwrite); this.ux = (CompoundButton) mView.findViewById(R.id.uexecute); this.gr = (CompoundButton) mView.findViewById(R.id.gread); this.gw = (CompoundButton) mView.findViewById(R.id.gwrite); this.gx = (CompoundButton) mView.findViewById(R.id.gexecute); this.or = (CompoundButton) mView.findViewById(R.id.oread); this.ow = (CompoundButton) mView.findViewById(R.id.owrite); this.ox = (CompoundButton) mView.findViewById(R.id.oexecute); try { getPermissions(mFile); } catch (Exception e) { disableBoxes(); this.mInputPermissions = null; this.mModifiedPermissions = null; } } @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { this.mModifiedPermissions = new Permissions(this.ur.isChecked(), this.uw.isChecked(), this.ux.isChecked(), this.gr.isChecked(), this.gw.isChecked(), this.gx.isChecked(), this.or.isChecked(), this.ow.isChecked(), this.ox.isChecked()); } private class LoadFsTask extends AsyncTask<File, Void, String> { private final WeakReference<FilePermissionsPagerItem> mItemRef; private LoadFsTask(@NotNull final FilePermissionsPagerItem item) { this.mItemRef = new WeakReference<FilePermissionsPagerItem>(item); } @Override protected String doInBackground(final File... params) { return params[0].getAbsolutePath(); } @Override protected void onPostExecute(final String file) { final FilePermissionsPagerItem item = mItemRef.get(); if (item != null) { if (file == null) { item.disableBoxes(); } } } } boolean areBoxesEnabled() { return this.ur.isEnabled(); } public void applyPermissions(final Context context) { if (!mInputPermissions.equals(mModifiedPermissions)) { final ApplyTask task = new ApplyTask(context, mModifiedPermissions); task.execute(this.mFile); } } private void disableBoxes() { mOwner.setText("---"); mGroup.setText("---"); this.ur.setEnabled(false); this.uw.setEnabled(false); this.ux.setEnabled(false); this.gr.setEnabled(false); this.gw.setEnabled(false); this.gx.setEnabled(false); this.or.setEnabled(false); this.ow.setEnabled(false); this.ox.setEnabled(false); } private class ApplyTask extends AsyncTask<File, Void, Boolean> { private final Context context; private final Permissions target; private ApplyTask(Context context, Permissions target) { this.context = context; this.target = target; } @Override protected Boolean doInBackground(final File... params) { return RootCommands.applyPermissions(params[0], this.target); } @Override protected void onPostExecute(Boolean result) { if (result) Toast.makeText(this.context, this.context.getString(R.string.permissionschanged), Toast.LENGTH_SHORT).show(); } } private void getPermissions(File file32) { String[] mFileInfo = null; mFileInfo = RootCommands.getFileProperties(file32); if (mFileInfo != null) { mOwner.setText(mFileInfo[1]); mGroup.setText(mFileInfo[2]); } else { disableBoxes(); } mPermission = new Permissions(mFileInfo[0]); this.ur.setChecked(mPermission.ur); this.uw.setChecked(mPermission.uw); this.ux.setChecked(mPermission.ux); this.gr.setChecked(mPermission.gr); this.gw.setChecked(mPermission.gw); this.gx.setChecked(mPermission.gx); this.or.setChecked(mPermission.or); this.ow.setChecked(mPermission.ow); this.ox.setChecked(mPermission.ox); this.ur.setOnCheckedChangeListener(this); this.uw.setOnCheckedChangeListener(this); this.ux.setOnCheckedChangeListener(this); this.gr.setOnCheckedChangeListener(this); this.gw.setOnCheckedChangeListener(this); this.gx.setOnCheckedChangeListener(this); this.or.setOnCheckedChangeListener(this); this.ow.setOnCheckedChangeListener(this); this.ox.setOnCheckedChangeListener(this); this.mInputPermissions = mPermission; this.mModifiedPermissions = mPermission; } } }