Java tutorial
/* * Copyright 2014 Yaroslav Mytkalyk * 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.docd.purefm.ui.activities; import java.util.List; import com.docd.purefm.Extras; import com.docd.purefm.R; import com.docd.purefm.adapters.BrowserBaseAdapter; import com.docd.purefm.adapters.BrowserGridAdapter; import com.docd.purefm.adapters.BrowserListAdapter; import com.docd.purefm.controller.ActionModeController; import com.docd.purefm.file.GenericFile; import com.docd.purefm.settings.Settings; import com.docd.purefm.tasks.AbstractSearchTask; import com.docd.purefm.utils.PFMFileUtils; import android.app.ActionBar; import android.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.graphics.drawable.Drawable; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.NavUtils; import android.view.KeyEvent; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.view.inputmethod.InputMethodManager; import android.widget.AbsListView; import android.widget.AdapterView; import android.widget.ListView; import android.widget.TextView; import android.support.annotation.NonNull; /** * Activity used for Searching files. * @author Doctoror */ public final class SearchActivity extends ActionBarIconThemableActivity implements AbstractSearchTask.SearchTaskListener { private ActionModeController mActionModeController; private InputMethodManager mInputMethodManager; private AbsListView mList; private BrowserBaseAdapter mAdapter; private TextView mInput; private View mProgress; private AbstractSearchTask mSearchTask; private GenericFile mStartDirectory; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setContentView(R.layout.activity_search); mStartDirectory = (GenericFile) getIntent().getSerializableExtra(Extras.EXTRA_FILE); mInputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); initActionBar(); initView(); } @Override protected void setActionBarIcon(final Drawable icon) { final ActionBar actionBar = getActionBar(); if (actionBar == null) { throw new RuntimeException("ActionBar should not be null"); } actionBar.setIcon(icon); } @Override protected void onStart() { super.onStart(); if (mAdapter.isEmpty() && mInput.requestFocus()) { mInputMethodManager.showSoftInput(mInput, InputMethodManager.SHOW_IMPLICIT); getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE); } } @Override protected void onStop() { super.onStop(); if (mSearchTask != null && mSearchTask.getStatus() == AsyncTask.Status.RUNNING) { mSearchTask.cancel(true); } } @Override public boolean onKeyUp(final int keyCode, @NonNull final KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_SEARCH) { this.onSearchClicked(); return true; } return super.onKeyUp(keyCode, event); } @Override public boolean onOptionsItemSelected(final MenuItem item) { switch (item.getItemId()) { case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; default: return super.onOptionsItemSelected(item); } } private void initActionBar() { //noinspection InflateParams final View actionBarCustom = this.getLayoutInflater().inflate(R.layout.activity_search_actionbar, null); if (actionBarCustom == null) { throw new RuntimeException("Inflated View is null"); } final TextView path = (TextView) actionBarCustom.findViewById(android.R.id.text1); path.setText(mStartDirectory.getAbsolutePath()); final ActionBar bar = this.getActionBar(); if (bar == null) { throw new RuntimeException("ActionBar should not be null"); } bar.setDisplayOptions(ActionBar.DISPLAY_HOME_AS_UP | ActionBar.DISPLAY_SHOW_HOME | ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_USE_LOGO); bar.setCustomView(actionBarCustom); mActionModeController = new ActionModeController(this); } private void initView() { this.initList(); this.mProgress = findViewById(android.R.id.progress); this.mInput = (TextView) this.findViewById(android.R.id.input); this.mInput.setOnEditorActionListener(new TextView.OnEditorActionListener() { @Override public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { onSearchClicked(); return true; } }); this.findViewById(R.id.search).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { onSearchClicked(); } }); } private void onSearchClicked() { final String text = mInput.getText().toString().trim(); if (text.isEmpty()) { return; } if (mSearchTask != null && mSearchTask.getStatus() == AsyncTask.Status.RUNNING) { mSearchTask.cancel(true); } mAdapter.updateData(new GenericFile[0]); mSearchTask = AbstractSearchTask.create(this, mStartDirectory, this); mSearchTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, text); } @Override public void onPreExecute(@NonNull AbstractSearchTask task) { mProgress.setVisibility(View.VISIBLE); } @Override public void onProgressUpdate(@NonNull AbstractSearchTask task, GenericFile... files) { mAdapter.addFiles(files); mInputMethodManager.hideSoftInputFromWindow(mInput.getWindowToken(), InputMethodManager.HIDE_IMPLICIT_ONLY); } @Override public void onCancelled(@NonNull AbstractSearchTask task) { onPostExecute(task); } @Override public void onPostExecute(@NonNull AbstractSearchTask task) { mProgress.setVisibility(View.INVISIBLE); final List<String> denied = mSearchTask.getDeniedLocations(); if (!denied.isEmpty()) { final AlertDialog.Builder b = new AlertDialog.Builder(this); final StringBuilder message = new StringBuilder(getString(R.string.search_denied_message)); for (final String deniedItem : denied) { message.append('\n').append(deniedItem); } b.setMessage(message.toString()); b.setNeutralButton(R.string.close, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); final Dialog dialog = b.create(); if (!isFinishing()) { dialog.show(); } } } private void initList() { if (mList != null) { final View emptyView = mList.getEmptyView(); if (emptyView != null) { emptyView.setVisibility(View.GONE); } mList.setVisibility(View.GONE); } final ViewGroup listContainer = (ViewGroup) findViewById(R.id.list_container); if (listContainer == null) { throw new RuntimeException("parent should contain ViewGroup with id R.id.list_container"); } final Settings settings = getSettings(); final View swipeRefreshList; switch (settings.getListAppearance()) { case LIST: swipeRefreshList = getLayoutInflater().inflate(R.layout.browser_listview, listContainer); break; case GRID: swipeRefreshList = getLayoutInflater().inflate(R.layout.browser_gridview, listContainer); break; default: throw new IllegalArgumentException("Unexpected ListApeparance: " + settings.getListAppearance()); } if (swipeRefreshList == null) { throw new RuntimeException("Inflated View is null"); } final ViewGroup swipeRefreshLayoutList = (ViewGroup) swipeRefreshList .findViewById(R.id.browser_list_swipe_refresh); mList = (AbsListView) swipeRefreshLayoutList.getChildAt(0); if (mList instanceof ListView) { mAdapter = new BrowserListAdapter(this); } else { mAdapter = new BrowserGridAdapter(this); } mList.setEmptyView(findViewById(android.R.id.empty)); mList.setAdapter(mAdapter); final View emptyView = mList.getEmptyView(); if (emptyView != null) { emptyView.setVisibility(View.GONE); } mList.setVisibility(View.GONE); mActionModeController.setListView(mList); mList.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> av, View v, int pos, long id) { final GenericFile target = (GenericFile) av.getItemAtPosition(pos); if (target == null) { throw new RuntimeException("Item at position is null"); } PFMFileUtils.openFileInExternalApp(SearchActivity.this, target.toFile()); } }); } }