============ Problem Description ============
Hello everyone, I have a problem recently:
As everyone knows, the play/Pause key in the player is the logic: when the user clicks on this key, if the current display is a "play" pattern, it will become a "pause" pattern, conversely, if the current "pause" pattern, will change to "play" pattern, so repeatedly ...
Now I'm working on this effect, and I'm doing it:
On the basis of the above basic effect, I also added the effect of the click Process, that is, when the point is also released when the wood, there will be a click effect (such as to add a halo effect to the current picture or something), this effect I was in the XML with selector tag implementation, on the code:
When on Play: (Xml_player_play.xml)
<?xml version= "1.0" encoding= "Utf-8"? ><selector xmlns:android= "http://schemas.android.com/apk/res/ Android "><itemandroid:state_pressed=" false "android:drawable=" @drawable/player_play_default "/>< Itemandroid:state_pressed= "true" android:drawable= "@drawable/player_play_pressed"/> <itemandroid:state_ Window_focused= "false" android:drawable= "@drawable/player_play_default"/></selector>
When you press pause: (xml_player_pause.xml)
<?xml version= "1.0" encoding= "Utf-8"? ><selector xmlns:android= "http://schemas.android.com/apk/res/ Android "><itemandroid:state_pressed=" false "android:drawable=" @drawable/player_pause_default "/>< Itemandroid:state_pressed= "true" android:drawable= "@drawable/player_pause_pressed"/> <itemandroid:state_ Window_focused= "false" android:drawable= "@drawable/player_pause_default"/></selector>
ImageButton XML file (omit code like ID, width, etc.):
<imagebutton android:background= "#0000" android:src= "@drawable/xml_player_play" Androi D:scaletype= "Centercrop"/>
The onclick () method is then implemented in the code to determine how the image should be changed:
if (Global.bt_play_play = = True) {Play.setbackgroundresource (r.drawable.xml_player_pause); Global.bt_play_play = false;} else if (Global.bt_play_play = = False) {Play.setbackgroundresource (r.drawable.xml_player_play); Global.bt_play_play = true;}
The Global.bt_play_play is a boolean static variable, which, by default, is true, which is used to determine whether a pattern is currently a divine horse or not.
It looks like there's a problem with the wood, but it works:
Just run up:
After clicking:
Click once more:
Why is it that there is an oval circle in it? And the picture changes, the previous picture did not disappear, coincident together?
============ Solution 1============
Before you set up the picture. Let's clear the picture first.
Why Ellipse? I don't know.
is not two pictures. Size (Height*width) is not the same. But the same layout is used. Like what. Automatic expansion.
And then it caused. Will there be an ellipse?
============ Solution 2============
<imagebutton
Android:background= "#0000"
android:src= "@drawable/xml_player_play"
Android:scaletype= "Centercrop"/>
Have src do not set background, background or src Delete to try
Logically your Java code is right ...
============ Solution 3============
Put the selector in the
<item
Android:state_window_focused= "false"
android:drawable= "@drawable/player_pause_default"/>
These are all removed.
Write the following pattern 414
<?xml version= "1.0" encoding= "UTF-8"?>
<selector xmlns:android= "Http://schemas.android.com/apk/res/android" >
<item android:state_pressed= "false" android:drawable= "@drawable/button_add"/>
<item android:state_pressed= "true" android:drawable= "@drawable/button_add_pressed"/>
<item android:state_focused= "true" android:drawable= "@drawable/button_add_pressed"/>
<item android:drawable= "@drawable/button_add"/>
</selector>
============ Solution 4============
if (Global.bt_play_play = = True)
{
Play.setimageresource (R.drawable.xml_player_pause);
Global.bt_play_play = false;
}
Else
{
Play.setimageresource (R.drawable.xml_player_play);
Global.bt_play_play = true;
}
Android help: About the Play/pause button in the player: use ImageButton to set the click Effect
