Java tutorial
/* * Copyright (C) 2013 * Arnav Gupta * Saurav Tomar * Umair Khan * * 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 3 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, see <http://www.gnu.org/licenses/>. */ package in.ac.dtu.subtlenews; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.app.Activity; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.NavUtils; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.webkit.WebChromeClient; import android.webkit.WebView; import android.widget.Button; import android.widget.ProgressBar; import java.util.ArrayList; import in.ac.dtu.subtlenews.util.SystemUiHider; /** * An example full-screen activity that shows and hides the system UI (i.e. * status bar and navigation/system bar) with user interaction. * * @see SystemUiHider */ public class InstapaperViewer extends Activity { public String summaryUrl = "http://google.com"; public Integer urlId = 0; public ArrayList<String> urlList; /** * Whether or not the system UI should be auto-hidden after * {@link #AUTO_HIDE_DELAY_MILLIS} milliseconds. */ private static final boolean AUTO_HIDE = true; /** * If {@link #AUTO_HIDE} is set, the number of milliseconds to wait after * user interaction before hiding the system UI. */ private static final int AUTO_HIDE_DELAY_MILLIS = 3000; /** * If set, will toggle the system UI visibility upon interaction. Otherwise, * will show the system UI visibility upon interaction. */ private static final boolean TOGGLE_ON_CLICK = true; /** * The flags to pass to {@link SystemUiHider#getInstance}. */ private static final int HIDER_FLAGS = SystemUiHider.FLAG_HIDE_NAVIGATION; /** * The instance of the {@link SystemUiHider} for this activity. */ private SystemUiHider mSystemUiHider; @SuppressLint("NewApi") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { setImmersive(true); } setTheme(R.style.AppTheme_NoActionBar); setContentView(R.layout.activity_instapaper_viewer); //setupActionBar(); Bundle extras = getIntent().getExtras(); if (extras != null) { urlId = extras.getInt("URLID"); urlList = extras.getStringArrayList("URLList"); } final WebView instapaperView = (WebView) findViewById(R.id.instapaper_viewer); final Activity activity = this; final ProgressBar progressBar; progressBar = (ProgressBar) findViewById(R.id.progressBar); instapaperView.setWebChromeClient(new WebChromeClient() { public void onProgressChanged(WebView view, int progress) { if (progress < 100 && progressBar.getVisibility() == ProgressBar.GONE) { progressBar.setVisibility(ProgressBar.VISIBLE); //txtview.setVisibility(View.VISIBLE); } progressBar.setProgress(progress); if (progress == 100) { progressBar.setVisibility(ProgressBar.GONE); //txtview.setVisibility(View.GONE); } } }); final View controlsView = findViewById(R.id.fullscreen_content_controls); final View contentView = findViewById(R.id.instapaper_viewer); final Button prevButton = (Button) findViewById(R.id.summary_prev_button); final Button nextButton = (Button) findViewById(R.id.summary_next_button); // Set up an instance of SystemUiHider to control the system UI for // this activity. mSystemUiHider = SystemUiHider.getInstance(this, contentView, HIDER_FLAGS); mSystemUiHider.setup(); mSystemUiHider.setOnVisibilityChangeListener(new SystemUiHider.OnVisibilityChangeListener() { // Cached values. int mControlsHeight; int mShortAnimTime; @Override @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2) public void onVisibilityChange(boolean visible) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { // If the ViewPropertyAnimator API is available // (Honeycomb MR2 and later), use it to animate the // in-layout UI controls at the bottom of the // screen. if (mControlsHeight == 0) { mControlsHeight = controlsView.getHeight(); } if (mShortAnimTime == 0) { mShortAnimTime = getResources().getInteger(android.R.integer.config_shortAnimTime); } controlsView.animate().translationY(visible ? 0 : mControlsHeight).setDuration(mShortAnimTime); } else { // If the ViewPropertyAnimator APIs aren't // available, simply show or hide the in-layout UI // controls. controlsView.setVisibility(visible ? View.VISIBLE : View.GONE); } if (visible && AUTO_HIDE) { // Schedule a hide(). delayedHide(AUTO_HIDE_DELAY_MILLIS); } } }); // Set up the user interaction to manually show or hide the system UI. contentView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (TOGGLE_ON_CLICK) { mSystemUiHider.toggle(); } else { mSystemUiHider.show(); } } }); // Upon interacting with UI controls, delay any scheduled hide() // operations to prevent the jarring behavior of controls going away // while interacting with the UI. prevButton.setOnTouchListener(mDelayHideTouchListener); nextButton.setOnTouchListener(mDelayHideTouchListener); try { summaryUrl = "http://www.instapaper.com/text?u=" + urlList.get(urlId); } catch (Exception e) { e.printStackTrace(); } instapaperView.loadUrl(summaryUrl); prevButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { try { summaryUrl = "http://www.instapaper.com/text?u=" + urlList.get(--urlId); } catch (Exception e) { e.printStackTrace(); } instapaperView.loadUrl(summaryUrl); } }); nextButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { try { summaryUrl = "http://www.instapaper.com/text?u=" + urlList.get(++urlId); } catch (Exception e) { e.printStackTrace(); } instapaperView.loadUrl(summaryUrl); } }); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Trigger the initial hide() shortly after the activity has been // created, to briefly hint to the user that UI controls // are available. delayedHide(100); } /** * Set up the {@link android.app.ActionBar}, if the API is available. */ /*@TargetApi(Build.VERSION_CODES.JELLY_BEAN) private void setupActionBar() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { // Show the Up button in the action bar. getActionBar().setDisplayHomeAsUpEnabled(true); } }*/ @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == android.R.id.home) { // This ID represents the Home or Up button. In the case of this // activity, the Up button is shown. Use NavUtils to allow users // to navigate up one level in the application structure. For // more details, see the Navigation pattern on Android Design: // // http://developer.android.com/design/patterns/navigation.html#up-vs-back // // TODO: If Settings has multiple levels, Up should navigate up // that hierarchy. NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } /** * Touch listener to use for in-layout UI controls to delay hiding the * system UI. This is to prevent the jarring behavior of controls going away * while interacting with activity UI. */ View.OnTouchListener mDelayHideTouchListener = new View.OnTouchListener() { @Override public boolean onTouch(View view, MotionEvent motionEvent) { if (AUTO_HIDE) { delayedHide(AUTO_HIDE_DELAY_MILLIS); } return false; } }; Handler mHideHandler = new Handler(); Runnable mHideRunnable = new Runnable() { @Override public void run() { mSystemUiHider.hide(); } }; /** * Schedules a call to hide() in [delay] milliseconds, canceling any * previously scheduled calls. */ private void delayedHide(int delayMillis) { mHideHandler.removeCallbacks(mHideRunnable); mHideHandler.postDelayed(mHideRunnable, delayMillis); } }