具有選定狀態的Android ImageButton？

Question

如果我使用一個帶選擇器的ImageButton作爲背景，是否有一個狀態可以改變，這會改變它的外觀？現在我可以在按下時更改圖像，但似乎沒有「突出顯示」或「選定」或類似的狀態，可讓我隨意切換其外觀。

這是我的XML;它只在按下時改變外觀。

<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
<item android:state_focused="true" android:state_pressed="false" android:drawable="@drawable/map_toolbar_details_selected" /> 
<item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/map_toolbar_details_selected" /> 
<item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/map_toolbar_details_selected" /> 
<item android:drawable="@drawable/map_toolbar_details" /> 

Answer 1

這個工作對我來說：

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
    <!-- NOTE: order is important (the first matching state(s) is what is rendered) --> 
    <item 
     android:state_selected="true" 
     android:drawable="@drawable/info_icon_solid_with_shadow" /> 
    <item 
     android:drawable="@drawable/info_icon_outline_with_shadow" /> 
</selector> 

然後在Java中：

//assign the image in code (or you can do this in your layout xml with the src attribute) 
imageButton.setImageDrawable(getBaseContext().getResources().getDrawable(R.drawable....)); 

//set the click listener 
imageButton.setOnClickListener(new OnClickListener() { 

    public void onClick(View button) { 
     //Set the button's appearance 
     button.setSelected(!button.isSelected()); 

     if (button.isSelected()) { 
      //Handle selected state change 
     } else { 
      //Handle de-select state change 
     } 

    } 

}); 

爲了平穩過渡，你也可以提動畫時間：

<selector xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_mediumAnimTime"> 

Answer 2

試試這個：

<item 
    android:state_focused="true" 
    android:state_enabled="true" 
    android:drawable="@drawable/map_toolbar_details_selected" /> 

也爲色彩我有成功與

<selector 
     xmlns:android="http://schemas.android.com/apk/res/android"> 
     <item 
      android:state_selected="true" 

      android:color="@color/primary_color" /> 
     <item 
      android:color="@color/secondary_color" /> 
</selector> 

Answer 3

這樣做沒有更多的圖像，最好的辦法：

public static void buttonEffect(View button){ 
    button.setOnTouchListener(new OnTouchListener() { 

     public boolean onTouch(View v, MotionEvent event) { 
      switch (event.getAction()) { 
       case MotionEvent.ACTION_DOWN: { 
        v.getBackground().setColorFilter(0xe0f47521,PorterDuff.Mode.SRC_ATOP); 
        v.invalidate(); 
        break; 
       } 
       case MotionEvent.ACTION_UP: { 
        v.getBackground().clearColorFilter(); 
        v.invalidate(); 
        break; 
       } 
      } 
      return false; 
     } 
    }); 
} 

Answer 4

ToggleImageButton這實現Checkable接口並支持OnCheckedChangeListener和android:checked xml屬性：

public class ToggleImageButton extends ImageButton implements Checkable { 
    private OnCheckedChangeListener onCheckedChangeListener; 

    public ToggleImageButton(Context context) { 
     super(context); 
    } 

    public ToggleImageButton(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     setChecked(attrs); 
    } 

    public ToggleImageButton(Context context, AttributeSet attrs, int defStyle) { 
     super(context, attrs, defStyle); 
     setChecked(attrs); 
    } 

    private void setChecked(AttributeSet attrs) { 
     TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.ToggleImageButton); 
     setChecked(a.getBoolean(R.styleable.ToggleImageButton_android_checked, false)); 
     a.recycle(); 
    } 

    @Override 
    public boolean isChecked() { 
     return isSelected(); 
    } 

    @Override 
    public void setChecked(boolean checked) { 
     setSelected(checked); 

     if (onCheckedChangeListener != null) { 
      onCheckedChangeListener.onCheckedChanged(this, checked); 
     } 
    } 

    @Override 
    public void toggle() { 
     setChecked(!isChecked()); 
    } 

    @Override 
    public boolean performClick() { 
     toggle(); 
     return super.performClick(); 
    } 

    public OnCheckedChangeListener getOnCheckedChangeListener() { 
     return onCheckedChangeListener; 
    } 

    public void setOnCheckedChangeListener(OnCheckedChangeListener onCheckedChangeListener) { 
     this.onCheckedChangeListener = onCheckedChangeListener; 
    } 

    public static interface OnCheckedChangeListener { 
     public void onCheckedChanged(ToggleImageButton buttonView, boolean isChecked); 
    } 
} 

RES /價值/ attrs.xml：

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
    <declare-styleable name="ToggleImageButton"> 
     <attr name="android:checked" /> 
    </declare-styleable> 
</resources> 

Answer 5

創建一個res/drawable文件夾中的XML文件。例如， 「btn_image.xml」：

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
    <item android:drawable="@drawable/bg_state_1" 
      android:state_pressed="true" 
      android:state_selected="true"/> 
    <item android:drawable="@drawable/bg_state_2" 
      android:state_pressed="true" 
      android:state_selected="false"/> 
    <item android:drawable="@drawable/bg_state_selected" 
      android:state_selected="true"/> 
    <item android:drawable="@drawable/bg_state_deselected"/> 
</selector> 

您可以將那些你喜歡的文件，例如，變 「bg_state_1」 到 「bg_state_deselected」 和 「bg_state_2」 到 「bg_state_selected」。

在任何這些，你可以寫類似的文件：

<shape xmlns:android="http://schemas.android.com/apk/res/android" 
     android:shape="rectangle"> 
    <solid android:color="#ccdd00"/> 
    <corners android:radius="5dp"/> 
</shape> 

佈局中的文件創建的ImageView或ImageButton的具有以下屬性：

<ImageView 
    android:id="@+id/image" 
    android:layout_width="50dp" 
    android:layout_height="50dp" 
    android:adjustViewBounds="true" 
    android:background="@drawable/btn_image" 
    android:padding="10dp" 
    android:scaleType="fitCenter" 
    android:src="@drawable/star"/> 

在後面的代碼：

image.setSelected(!image.isSelected());