具有选定状态的Android ImageButton？
如果我使用一个ImageButton的背景select器，是否有一个状态，我可以改变这将改变它的外观？ 现在我可以用它来改变图像时，但似乎没有“突出显示”或“select”或类似的状态，让我切换其外观随意。
这是我的XML; 它只在按下时才改变外观。
<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" />
这适用于我：
<?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>
然后在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 } } });
为了平滑过渡，你还可以提到animation时间：
<selector xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_mediumAnimTime">
ToggleImageButton实现ToggleImageButton接口并支持OnCheckedChangeListener和android:checked xml属性：
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 /值/ attrs.xml：
<?xml version="1.0" encoding="utf-8"?> <resources> <declare-styleable name="ToggleImageButton"> <attr name="android:checked" /> </declare-styleable> </resources>
最好的方式做到这一点，没有更多的图像：
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; } }); }
尝试这个：
<item android:state_focused="true" android:state_enabled="true" android:drawable="@drawable/map_toolbar_details_selected" />
也为我成功的颜色
<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>
在res/drawable文件夹中创build一个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>
你可以结合你喜欢的文件，例如，将“bg_state_1”改为“bg_state_deselected”，“bg_state_2”改为“bg_state_selected”。
在这些文件的任何一个，你可以写如下的东西：
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <solid android:color="#ccdd00"/> <corners android:radius="5dp"/> </shape>
在布局文件中创build具有以下属性的ImageView或ImageButton：
<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"/>
后来在代码中：
image.setSelected(!image.isSelected());
