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Code Issues Packages Projects Releases Wiki Activity

new "back to the top" feature

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This commit is contained in:
kelson42 2013-11-22 18:48:04 +01:00
parent c40a1aad93
commit f878e0f1f5
2 changed files with 113 additions and 7 deletions
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65
src/org/kiwix/kiwixmobile/KiwixMobileActivity.java
View File

@ -49,11 +49,13 @@ import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import android.widget.Toast;
import android.view.View.OnClickListener;
import android.view.animation.AnimationUtils;
public class KiwixMobileActivity extends Activity {
/** Called when the activity is first created. */
private WebView webView;
private SharedPreferences mySharedPreferences;
private KiwixWebView webView;
private ArrayAdapter<String> adapter;
protected boolean requestClearHistoryAfterLoad;
protected boolean requestInitAllMenuItems;
@ -65,7 +67,9 @@ public class KiwixMobileActivity extends Activity {
private AutoCompleteTextView articleSearchtextView;
private LinearLayout articleSearchBar;
private Menu menu;
private boolean isFullscreenOpened;
//Tracks the user preference of of showing the button or not
private boolean isButtonEnabled = true;
private boolean isFullscreenOpened;
private ImageButton exitFullscreenButton;
@ -146,7 +150,14 @@ public class KiwixMobileActivity extends Activity {
this.setProgressBarVisibility(true);
setContentView(R.layout.main);
webView = (WebView) findViewById(R.id.webview);
//Locate and hook up the Back to top button
findViewById(R.id.btn_back_to_top).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
webView.pageUp(true);
}
});
webView =(KiwixWebView) findViewById(R.id.webview);
articleSearchBar = (LinearLayout) findViewById(R.id.articleSearchBar);
articleSearchtextView = (AutoCompleteTextView) findViewById(R.id.articleSearchTextView);
@ -298,7 +309,38 @@ public class KiwixMobileActivity extends Activity {
}
public void onPageFinished(WebView view, String url) {
String title = getResources().getString(R.string.app_name);
//register a {@KiwixWebView.OnPageChangeListener} to get changes in scroll position
webView.registerOnPageChangedListener(new KiwixWebView.OnPageChangeListener() {
@Override
public void onPageChanged(int page, int maxPages) {
if (isButtonEnabled)
{
//Don't go on the values these are observed to be working :p
//Simple logic if scrolled to more than the threshold then show the button.
if (((double)page/maxPages) >= 0.1)
{
if (KiwixMobileActivity.this.findViewById(R.id.btn_back_to_top).getVisibility() == View.INVISIBLE)
{
KiwixMobileActivity.this.findViewById(R.id.btn_back_to_top).setVisibility(View.VISIBLE);
//U said you wanted fancy huh,then this might just do it.
KiwixMobileActivity.this.findViewById(R.id.btn_back_to_top).startAnimation(AnimationUtils.loadAnimation(KiwixMobileActivity.this,android.R.anim.fade_in));
}
}
else
{
if (KiwixMobileActivity.this.findViewById(R.id.btn_back_to_top).getVisibility() == View.VISIBLE)
{
KiwixMobileActivity.this.findViewById(R.id.btn_back_to_top).setVisibility(View.INVISIBLE);
//U said you wanted fancy huh,then this might just do it.
KiwixMobileActivity.this.findViewById(R.id.btn_back_to_top).startAnimation(AnimationUtils.loadAnimation(KiwixMobileActivity.this,android.R.anim.fade_out));
}
}
}
}
});
String title = getResources().getString(R.string.app_name);
if (webView.getTitle()!=null && !webView.getTitle().isEmpty())
title = webView.getTitle();
getActionBar().setTitle(title);
@ -360,11 +402,11 @@ public class KiwixMobileActivity extends Activity {
}
private void loadPref(){
SharedPreferences mySharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
mySharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
String pref_zoom = mySharedPreferences.getString("pref_zoom", "automatic");
Boolean pref_zoom_enabled = mySharedPreferences.getBoolean("pref_zoom_enabled", false);
Boolean pref_nightmode= mySharedPreferences.getBoolean("pref_nightmode", false);
isButtonEnabled = mySharedPreferences.getBoolean("pref_top_button",isButtonEnabled);
if (pref_zoom.equals("automatic")) {
setDefaultZoom();
} else if (pref_zoom.equals("medium")) {
@ -384,7 +426,16 @@ public class KiwixMobileActivity extends Activity {
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setDisplayZoomControls(pref_zoom_enabled);
//Night mode status
Log.d("kiwix","pref_top_button value ("+pref_zoom_enabled+")");
//DONT register a onSharedPrefenceChangedListener as the activity is haulted when on
//PreferenceFrag. so it might cause issues
if (!isButtonEnabled)
{
if (findViewById(R.id.btn_back_to_top).getVisibility() == View.VISIBLE)
findViewById(R.id.btn_back_to_top).setVisibility(View.INVISIBLE);
}
//Night mode status
Log.d("kiwix","pref_nightmode value ("+pref_nightmode+")");
if(NightMode!=pref_nightmode)
ToggleNightMode();

55
src/org/kiwix/kiwixmobile/KiwixWebView.java Normal file
View File

@ -0,0 +1,55 @@
package org.kiwix.kiwixmobile;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.webkit.WebView;
/**
* Created by sakchham on 20/11/13.
*/
/*
* Custom version of link{@android.webkit.WebView}
* to get scroll positions for implimenting the Back to top
*/
public class KiwixWebView extends WebView
{
OnPageChangeListener changeListener = null;
public KiwixWebView(Context context) {
super(context);
}
public KiwixWebView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public KiwixWebView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
int windowHeight = getMeasuredHeight();
int pages = getContentHeight()/windowHeight;
int page = t/windowHeight;
//alert the listeners
if (changeListener != null);
changeListener.onPageChanged(page,pages);
}
public interface OnPageChangeListener {
public void onPageChanged(int page,int maxPages);
}
/*
* We wouldn't be needing more than one so doesn't matter if it wont work for more
* than one.
*/
public void registerOnPageChangedListener(OnPageChangeListener listener)
{
changeListener = listener;
}
}