How do I set a different color for the pressed sta

问题:

I have some Buttons on my android app. They have an icon and text. I can set the background color of a Button in java code. If the button is clicked I want to display with a different color. So, how do I set a different color for the pressed state of the Button?

<Button 
  android:id="@+id/save" 
  android:layout_width="130dip"
  android:layout_height="wrap_content" 
  android:scaleType="center"
  android:drawableTop="@drawable/save"
  android:text="Save"
  android:textColor="#FFFFFF"
  android:textSize="14dip" 
>

The onCreate method:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.homescreen);
 save = (Button)findViewById(R.id.save);
    save.setBackgroundColor(Color.rgb(27,161,226)); }

回答1:

create xml file using the button image like this with mybutton.xml in drawable folder

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
   <item android:state_pressed="true" android:drawable="@color/blue" />
   <item android:state_focused="true" android:drawable="@color/gold" />
   <item android:drawable="@color/grey" />
</selector>

and use this in button xml code

android:background="@drawable/mybutton"

add those color codes in the resource-->values-->colors.xml like this

<?xml version="1.0" encoding="utf-8"?>
<resources>   
  <color name="blue">#0066cc</color>
  <color name="gold">#e6b121</color>
  <color name="grey">#cccccc</color>
</resources>

Reference : Change button background on touch

回答2:

Below is the sample code for color state list used for a button

<?xml version="1.0" encoding="UTF-8"?>

    <selector xmlns:android="http://schemas.android.com/apk/res/android" >
        <item
            android:color="#c0c0c0"
            android:state_selected="true"/>
        <item
            android:color="#ffffff"
            android:state_pressed="true"/>
        <item
            android:color="#9A9A9A"
            android:state_focused="false"
            android:state_pressed="false"
            android:state_selected="false"/>
</selector>

Also please check below link for color state list

http://developer.android.com/guide/topics/resources/color-list-resource.html

回答3:

You need to use a drawable with selector for pressed states, more commonly done in xml links below.

http://developer.android.com/reference/android/graphics/drawable/StateListDrawable.html

http://developer.android.com/guide/topics/resources/drawable-resource.html#StateList

回答4:

Use a StateList. Below is an example of a selector with a different drawable for the pressed state:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/drawable_for_pressed_state" android:state_pressed="true"/>
    <item android:drawable="@drawable/drawable_for_normal_state"/>

</selector>

回答5:

edittext_modified_states.xml

<?xml version="1.0" encoding="UTF-8"?>
<selector
  xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/apptheme_textfield_activated_holo_light" />
    <item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/apptheme_textfield_focused_holo_light" />
    <item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/apptheme_textfield_disabled_focused_holo_light"/>
    <item android:drawable="@drawable/apptheme_textfield_default_holo_light" />
</selector>

here: http://android-holo-colors.com goto this website and select your color and imort into your drawable. goto layout xml and set button background. android:background="@drawable/edittext_modified_states"

回答6:

If you want to change button background color then just do as follow..

@Override
    public void onClick(View v) {       
        if(v.getId() == R.id.btn01) {
                btn1.setBackgroundColor(Color.RED);
                btn1.setTextColor(Color.WHITE);

            }

just add this code in onclick event of button.