Executing simple code on android app before closing - java

Hello, I've been trying to integrate airpush in andriod but I've been having some issues.
#Override public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
mWebView.goBack();
return true;
}
return super.onKeyDown(keyCode, event);
}
As you can see is the andriod go back code for webview via history.
The problem is that I want execute this code when it has no more history, meaning when the application is about to close.
airpush.startLandingPageAd();
Any help will be greatly appreciated guys :)..


You need to edit your code, like this:
#Override public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK)) {
if(mWebView.canGoBack())
{
mWebView.goBack();
return true;
}
else
{
//Your webview doesn't have any history here and you can close your app here.
//You can also execute your Airpush code here.
airpush.startLandingPageAd();
return true;
}
}
return super.onKeyDown(keyCode, event);
}
I hope this helps.


Consider overriding onPause method of Activity for executing a piece of code before the activity hides.
#Override
protected void onPause() {
super.onPause();
airpush.startLandingPageAd();
}

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Log.d("mytag", "keycode_power");
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return super.onKeyDown(keyCode, event);
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However, nothing prints to log. I've also tried:
#Override
public boolean dispatchKeyEvent(KeyEvent event) {
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but that doesn't work either.
Any suggestions?

I'm No Expert, But I Don't Think That The Power Button Counts As A Keypress

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I need to minimize the application when back button is pressed.
I use following code to catch hardware back button click event
help me with the code of minimize on back key pressed
#Override
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I think that you need to treat back event as home event. The code below is how I emulate home pressed when User press back button:
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This is a simple code to minimize the application
#Override
public void onBackPressed() {
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try this code, this will minimize Activity.
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0)
{
this.moveTaskToBack(true);
return true;
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return super.onKeyDown(keyCode, event);
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or
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How can i make the below code work with a viewpagers that is loading 3 fragments, all are webviews with different URL's. Im simply trying to make it so that when clicking back on whatever fragment, it calls web.goBack();
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if ((KeyCode == KeyEvent.KEYCODE_BACK) && web.canGoBack()) {
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return true;
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You can override this in main Activity and then in on onKeyDown(int KeyCode, KeyEvent event) get your ViewPagers current fragment. In the end you will able to do something like this :
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Best wishes.

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The code below only works in 2.2 and 2.3, so how would I change this so it can work in 4.0?
/* FIXME: How does it works within Android 4.0? */
#Override
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Try this:
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if ((keyCode == KeyEvent.KEYCODE_HOME)) {
//do nothing
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}
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public void onBackPressed() {return;}
but still doesn't work.

You need this:
#Override
public void onBackPressed() {
super.onBackPressed();
}
Or this pre API level 5:
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
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// your implementation here
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}
return super.onKeyDown(keyCode, event);
}

write
super.onBackPressed();
or
this.finish();
instead of return;

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