Java tutorial
package com.kaszubski.kamil.emmhelper; import android.app.ProgressDialog; import android.app.SearchManager; import android.content.Context; import android.content.Intent; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.os.AsyncTask; import android.os.Bundle; import android.os.Handler; import android.support.annotation.NonNull; import android.support.design.widget.NavigationView; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v4.view.GravityCompat; import android.support.v4.view.MenuItemCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.SearchView; import android.support.v7.widget.Toolbar; import android.text.TextUtils; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ProgressBar; import android.widget.TextView; import com.kaszubski.kamil.emmhelper.utils.Constants; import com.kaszubski.kamil.emmhelper.utils.Utils; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.lang.reflect.Field; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, SearchView.OnQueryTextListener { private static final String TAG = "MainActivity"; private List<PackageInfo> list; private List<PackageInfo> searchResults; private PackageManager packageManager; private FragmentManager fragmentManager; private SearchView searchView; private ProgressDialog progressDialog; private ProgressBar progressBar; private SearchPackages searchPackages; private Toolbar toolbar; private String previousQuery; private DrawerLayout drawer; private NavigationView navigationView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); fragmentManager = getSupportFragmentManager(); drawer = (DrawerLayout) findViewById(R.id.drawer_layout); if (drawer != null) setDrawer(); setNavigationView(); fragmentManager.beginTransaction().replace(R.id.container, new SearchFragment(), Constants.FRAGMENT_SEARCH) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).commit(); } private void setDrawer() { ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); drawer.addDrawerListener(toggle); toggle.syncState(); } private void setNavigationView() { navigationView = (NavigationView) findViewById(R.id.nav_view); if (navigationView != null) { navigationView.setNavigationItemSelectedListener(this); navigationView.setCheckedItem(R.id.nav_app_list); } } @Override public void onBackPressed() { DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); if (drawer != null && drawer.isDrawerOpen(GravityCompat.START)) { drawer.closeDrawer(GravityCompat.START); } else if (fragmentManager.findFragmentByTag(Constants.FRAGMENT_EXPORT) != null) { if (getTitle().equals("/")) super.onBackPressed(); else { ((ExportFragment) fragmentManager.findFragmentByTag(Constants.FRAGMENT_EXPORT)).moveUp(); } } else super.onBackPressed(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. if (fragmentManager.findFragmentById(R.id.container) != null) { switch (fragmentManager.findFragmentById(R.id.container).getTag()) { case Constants.FRAGMENT_SEARCH: longTextTitleMode(false); setTitle(getString(R.string.application_list)); getMenuInflater().inflate(R.menu.fragment_search, menu); SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); searchView = (SearchView) MenuItemCompat.getActionView(menu.findItem(R.id.action_search)); searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName())); searchView.setQueryHint(getString(R.string.query_hint)); progressDialog = new ProgressDialog(this, ProgressDialog.STYLE_SPINNER); progressDialog.setMessage(getString(R.string.loading_packages)); progressDialog.setIndeterminate(true); progressDialog.setCancelable(false); progressDialog.show(); new LoadPackages().execute(); break; case Constants.FRAGMENT_IP_FIND: longTextTitleMode(false); setTitle(getString(R.string.hostname_ips)); getMenuInflater().inflate(R.menu.fragment_ip_finder, menu); break; case Constants.FRAGMENT_EXPORT: longTextTitleMode(true); break; case Constants.FRAGMENT_LICENSE_CHECK: longTextTitleMode(false); setTitle(getString(R.string.check_elm_key)); break; } } return true; } private void longTextTitleMode(boolean enabled) { try { Field titleField = Toolbar.class.getDeclaredField("mTitleTextView"); titleField.setAccessible(enabled); TextView barTitleView = (TextView) titleField.get(toolbar); barTitleView.setEllipsize(enabled ? TextUtils.TruncateAt.START : TextUtils.TruncateAt.START); barTitleView.setFocusable(enabled); barTitleView.setFocusableInTouchMode(enabled); barTitleView.requestFocus(); barTitleView.setSingleLine(enabled); barTitleView.setSelected(enabled); } catch (NoSuchFieldException e) { Log.e(TAG, "" + e); } catch (IllegalAccessException e) { Log.e(TAG, " " + e); } } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); switch (id) { case R.id.action_share_list: if (fragmentManager.findFragmentByTag(Constants.FRAGMENT_SEARCH) != null) { ArrayList<String> export = ((SearchFragment) fragmentManager .findFragmentByTag(Constants.FRAGMENT_SEARCH)).getExportList(); if (export != null && export.size() > 0) { StringBuilder builder = new StringBuilder(); for (String s : export) builder.append(s).append("\n"); Utils.shareViaList(this, builder.toString().trim()); } else { Utils.showToast(this, getString(R.string.export_list_is_empty)); } } break; case R.id.action_export_to_csv: ArrayList<String> export; if (fragmentManager.findFragmentByTag(Constants.FRAGMENT_SEARCH) != null) export = ((SearchFragment) fragmentManager.findFragmentByTag(Constants.FRAGMENT_SEARCH)) .getExportList(); else export = ((IPFinderFragment) fragmentManager.findFragmentByTag(Constants.FRAGMENT_IP_FIND)) .getExportList(); if (export != null && export.size() > 0) { Intent intent = new Intent(this, ExportActivity.class); intent.putExtra(Constants.ARRAY_KEY, export); intent.putExtra(Constants.FILE_FORMAT_KEY, Constants.CSV_FILE_EXTENSION); startActivity(intent); } else { Utils.showToast(this, getString(R.string.export_list_is_empty)); } break; case R.id.action_clear_export_list: ((SearchFragment) fragmentManager.findFragmentByTag(Constants.FRAGMENT_SEARCH)).clearExportList(); break; case R.id.action_share: if (fragmentManager.findFragmentByTag(Constants.FRAGMENT_IP_FIND) != null) { ArrayList<String> list = ((IPFinderFragment) fragmentManager .findFragmentByTag(Constants.FRAGMENT_IP_FIND)).getExportList(); if (list != null && list.size() > 0) { StringBuilder builder = new StringBuilder(); for (String s : list) builder.append(s).append("\n"); Utils.shareViaList(this, builder.toString().trim()); } else { Utils.showToast(this, "IP list is empty"); } } break; } return super.onOptionsItemSelected(item); } @SuppressWarnings("StatementWithEmptyBody") @Override public boolean onNavigationItemSelected(MenuItem item) { // Handle navigation view item clicks here. int id = item.getItemId(); switch (id) { case R.id.nav_app_list: fragmentManager.beginTransaction() .replace(R.id.container, new SearchFragment(), Constants.FRAGMENT_SEARCH) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).commit(); break; case R.id.nav_manifest_viewer: Utils.showToast(this, getString(R.string.find_apk_file_to_view_its_manifest)); fragmentManager.beginTransaction() .replace(R.id.container, ExportFragment.newInstance(Constants.APK_FILE_EXTENSION), Constants.FRAGMENT_EXPORT) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).commit(); break; case R.id.nav_root_explorer: fragmentManager.beginTransaction() .replace(R.id.container, new ExportFragment(), Constants.FRAGMENT_EXPORT) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).commit(); break; case R.id.nav_ip_for_hostname: fragmentManager.beginTransaction() .replace(R.id.container, new IPFinderFragment(), Constants.FRAGMENT_IP_FIND) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).commit(); break; case R.id.nav_license_checker: fragmentManager.beginTransaction() .replace(R.id.container, new LicenseCheckFragment(), Constants.FRAGMENT_LICENSE_CHECK) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).commit(); } return true; } public void closeDrawer() { DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); if (drawer != null) { drawer.closeDrawer(GravityCompat.START); } } @Override public boolean onQueryTextSubmit(String query) { return false; } @Override public boolean onQueryTextChange(final String newText) { Log.v(TAG, "query \"" + newText + "\""); Fragment fragment = fragmentManager.findFragmentByTag(Constants.FRAGMENT_SEARCH); if (newText.trim().length() > 0) { if (progressBar == null && fragment != null) progressBar = ((SearchFragment) fragment).getProgressBar(); if (previousQuery != null && newText.contains(previousQuery)) { Log.i(TAG, "similar query true"); final Handler handler = new Handler(); handler.post(new Runnable() { @Override public void run() { if (searchPackages.getStatus() == AsyncTask.Status.FINISHED) { searchPackages = new SearchPackages(true); searchPackages.execute(newText); } else { handler.postDelayed(this, 200); } } }); } else { Log.i(TAG, "similar query false"); searchResults.clear(); if (searchPackages != null && searchPackages.getStatus() != AsyncTask.Status.FINISHED) { searchPackages.cancel(true); progressBar.setVisibility(View.INVISIBLE); } searchPackages = new SearchPackages(); searchPackages.execute(newText); } previousQuery = newText; progressBar.setVisibility(View.VISIBLE); } else if (fragment != null) ((SearchFragment) fragment).setSearchResults(list); return true; } class PackagesComparator implements Comparator<PackageInfo> { @Override public int compare(PackageInfo lhs, PackageInfo rhs) { return lhs.packageName.compareTo(rhs.packageName); } } @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { Log.e(TAG, "code " + requestCode); switch (requestCode) { case Constants.WRITE_PERMISSION: if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { Fragment fragment; if ((fragment = fragmentManager.findFragmentByTag(Constants.FRAGMENT_SEARCH)) != null) Utils.extractAPK(this, ((SearchFragment) fragment).getPackageInfo()); else if ((fragment = fragmentManager.findFragmentByTag(Constants.FRAGMENT_EXPORT)) != null) { ((ExportFragment) fragment).permissionGranted(); } } else { Utils.showToast(this, getString(R.string.write_permission_is_required_to_perform_this_action)); } break; case Constants.INTERNET_PERMISSION: { if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { Fragment fragment = fragmentManager.findFragmentByTag(Constants.FRAGMENT_IP_FIND); if (fragment != null) ((IPFinderFragment) fragment).searchIPs(); } else { Utils.showToast(this, getString(R.string.internet_permission_is_required_to_perform_this_action)); } break; } } } class LoadPackages extends AsyncTask<Void, Void, List<PackageInfo>> { @Override protected List<PackageInfo> doInBackground(Void... params) { packageManager = getPackageManager(); list = packageManager.getInstalledPackages(0); if (list.size() < 50) { list = new ArrayList<>(); Process process; BufferedReader bufferedReader = null; try { process = Runtime.getRuntime().exec("pm list packages"); bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream())); String line; while ((line = bufferedReader.readLine()) != null) { final String packageName = line.substring(line.indexOf(':') + 1); final PackageInfo packageInfo = packageManager.getPackageInfo(packageName, 0); list.add(packageInfo); } process.waitFor(); } catch (Exception f) { f.printStackTrace(); } if (bufferedReader != null) try { bufferedReader.close(); } catch (IOException e1) { e1.printStackTrace(); } } searchResults = new ArrayList<>(); return list; } @Override protected void onPostExecute(List<PackageInfo> packageInfos) { super.onPostExecute(packageInfos); Fragment fragment; if ((fragment = fragmentManager.findFragmentByTag(Constants.FRAGMENT_SEARCH)) != null) ((SearchFragment) fragment).setSearchResults(packageInfos); searchView.setOnQueryTextListener(MainActivity.this); progressDialog.dismiss(); } } class SearchPackages extends AsyncTask<String, Void, List<PackageInfo>> { private boolean searchInCurrentResults; SearchPackages(boolean searchInCurrentResults) { this.searchInCurrentResults = searchInCurrentResults; } SearchPackages() { searchInCurrentResults = false; } @Override protected List<PackageInfo> doInBackground(String... params) { String textToFind = params[0].toLowerCase(); ArrayList<PackageInfo> input; ArrayList<PackageInfo> results = new ArrayList<>(); if (searchInCurrentResults) { input = (ArrayList<PackageInfo>) searchResults; } else { input = (ArrayList<PackageInfo>) list; } Log.i(TAG, "similar query " + searchInCurrentResults + " " + input.size()); for (PackageInfo p : input) { if (p.packageName.toLowerCase().contains(textToFind) || String .valueOf(p.applicationInfo.loadLabel(packageManager)).toLowerCase().contains(textToFind)) { results.add(p); } if (isCancelled()) break; } Log.i(TAG, "results size " + results.size()); return results; } @Override protected void onPostExecute(List<PackageInfo> packageInfos) { super.onPostExecute(packageInfos); searchResults = packageInfos; progressBar.setVisibility(View.INVISIBLE); Collections.sort(searchResults, new PackagesComparator()); Fragment fragment; if ((fragment = fragmentManager.findFragmentByTag(Constants.FRAGMENT_SEARCH)) != null) ((SearchFragment) fragment).setSearchResults(searchResults); } } }