有一些特殊情況需要動態設置Selector，所以用代碼實現
XML Selector 如下
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<!-- Non focused states -->
<item android:state_focused="false" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/contact" />
<item android:state_focused="false" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/contact_sel" />
<!-- Focused states -->
<item android:state_focused="true" android:state_selected="false" android:state_pressed="false" android:drawable="@drawable/contact_sel" />
<item android:state_focused="true" android:state_selected="true" android:state_pressed="false" android:drawable="@drawable/contact_sel" />
<!-- Pressed -->
<item android:state_selected="true" android:state_pressed="true" android:drawable="@drawable/contact_sel" />
<item android:state_pressed="true" android:drawable="@drawable/contact_sel" />
</selector>
代碼實現
StateListDrawable drawable = new StateListDrawable();
//Non focused states
drawable.addState(new int[]{-android.R.attr.state_focused, -android.R.attr.state_selected, -android.R.attr.state_pressed},
getResources().getDrawable(R.drawable.contact));
drawable.addState(new int[]{-android.R.attr.state_focused, android.R.attr.state_selected, -android.R.attr.state_pressed},
getResources().getDrawable(R.drawable.contact_sel));
//Focused states
drawable.addState(new int[]{android.R.attr.state_focused,-android.R.attr.state_selected, -android.R.attr.state_pressed},
getResources().getDrawable(R.drawable.contact_sel));
drawable.addState(new int[]{android.R.attr.state_focused,android.R.attr.state_selected, -android.R.attr.state_pressed},
getResources().getDrawable(R.drawable.contact_sel));
//Pressed
drawable.addState(new int[]{android.R.attr.state_selected, android.R.attr.state_pressed},
getResources().getDrawable(R.drawable.contact_sel));
drawable.addState(new int[]{android.R.attr.state_pressed},
getResources().getDrawable(R.drawable.contact_sel));
TextView textView = (TextView) findViewById(R.id.TextView_title);
textView.setCompoundDrawablesWithIntrinsicBounds(null, drawable, null, null);
注意里面的“-”號，當XML的設定是false時，就需要使用資源符號的負值來設定。
我在項目里面的做法是這樣的：
public void setIconDrawableSelector() {
StateListDrawable drawable = new StateListDrawable();
Drawable drawableNoSel = Drawable.createFromPath(mLocalArrayList.get(0));
Drawable drawableSel = Drawable.createFromPath(mLocalArrayList.get(1));
StateListDrawable drawable1 = new StateListDrawable();
Drawable drawableNoSel1 = Drawable.createFromPath(mLocalArrayList.get(2));
Drawable drawableSel1 = Drawable.createFromPath(mLocalArrayList.get(3));
StateListDrawable drawable2 = new StateListDrawable();
Drawable drawableNoSel2 = Drawable.createFromPath(mLocalArrayList.get(4));
Drawable drawableSel2 = Drawable.createFromPath(mLocalArrayList.get(5));
StateListDrawable drawable3 = new StateListDrawable();
Drawable drawableNoSel3 = Drawable.createFromPath(mLocalArrayList.get(6));
Drawable drawableSel3 = Drawable.createFromPath(mLocalArrayList.get(7));
//Non focused states
drawable.addState(new int[]{-android.R.attr.state_focused, -android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableNoSel);
drawable.addState(new int[]{-android.R.attr.state_focused, android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel);
//Focused states
drawable.addState(new int[]{android.R.attr.state_focused, -android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel);
drawable.addState(new int[]{android.R.attr.state_focused, android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel);
((ImageView) findViewById(mainBottomIds[0])).setImageDrawable(drawable);
findViewById(mainBottomIds[0]).setSelected(true);
//Non focused states
drawable1.addState(new int[]{-android.R.attr.state_focused, -android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableNoSel1);
drawable1.addState(new int[]{-android.R.attr.state_focused, android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel1);
//Focused states
drawable1.addState(new int[]{android.R.attr.state_focused, -android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel1);
drawable1.addState(new int[]{android.R.attr.state_focused, android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel1);
((ImageView) findViewById(mainBottomIds[1])).setImageDrawable(drawable1);
findViewById(mainBottomIds[1]).setSelected(false);
//Non focused states
drawable2.addState(new int[]{-android.R.attr.state_focused, -android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableNoSel2);
drawable2.addState(new int[]{-android.R.attr.state_focused, android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel2);
//Focused states
drawable2.addState(new int[]{android.R.attr.state_focused, -android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel2);
drawable2.addState(new int[]{android.R.attr.state_focused, android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel2);
((ImageView) findViewById(mainBottomIds[2])).setImageDrawable(drawable2);
findViewById(mainBottomIds[2]).setSelected(false);
//Non focused states
drawable3.addState(new int[]{-android.R.attr.state_focused, -android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableNoSel3);
drawable3.addState(new int[]{-android.R.attr.state_focused, android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel3);
//Focused states
drawable3.addState(new int[]{android.R.attr.state_focused, -android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel3);
drawable3.addState(new int[]{android.R.attr.state_focused, android.R.attr.state_selected, -android.R.attr.state_pressed},
drawableSel3);
((ImageView) findViewById(mainBottomIds[3])).setImageDrawable(drawable3);
findViewById(mainBottomIds[3]).setSelected(false);
}
我其實只用到兩個狀態就夠了，這里是我的底部導航動態加載。
