【原创】Android中ImageButton自定义按钮的按下效果的代码实现方法,附网上2种经典解决方法。 收藏
首先看看网上的 2 种方法:
【以下为引用网络,来源: http://www.eoeandroid.com/thread-7931-1-1.html 】
使用 Button 时为了让用户有“按下”的效果,有两种实现方式:
1. 在代码里面。
- imageButton.setOnTouchListener( new OnTouchListener(){
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- if (event.getAction() == MotionEvent.ACTION_DOWN){
- //更改为按下时的背景图片
- v.setBackgroundResource(R.drawable.pressed);
- }else if (event.getAction() == MotionEvent.ACTION_UP){
- //改为抬起时的图片
- v.setBackgroundResource(R.drawable.released);
- }
- return false ;
- }
- });
- imageButton.setOnTouchListener(new OnTouchListener(){
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- if (event.getAction() == MotionEvent.ACTION_DOWN){
- //更改为按下时的背景图片
- v.setBackgroundResource(R.drawable.pressed);
- }else if (event.getAction() == MotionEvent.ACTION_UP){
- //改为抬起时的图片
- v.setBackgroundResource(R.drawable.released);
- }
- return false ;
- }
- });
2. 用 XML 文件实现。
- <? 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 >
- <? 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 >
这个文件放在 drawable 目录下面。命名为 button_add_x.xml
使用的时候
- < ImageButton
- android:id = "@+id/ImageButton"
- android:layout_width = "wrap_content"
- android:layout_height = "wrap_content"
- android:background = "#00000000"
- android:src = "@drawable/button_add_x" >
- </ ImageButton >
- < ImageButton
- android:id = "@+id/ImageButton"
- android:layout_width = "wrap_content"
- android:layout_height = "wrap_content"
- android:background = "#00000000"
- android:src = "@drawable/button_add_x" >
- </ ImageButton >
【以上为引用网络,来源: http://www.eoeandroid.com/thread-7931-1-1.html 】
【以下为原创,转载请注明出处: http://blog.youkuaiyun.com/sytzz/archive/2010/06/16/5673662.aspx 】
我自己摸索摸索,发现这样的实现过程虽然通用性好,但是很麻烦,一个按钮实现效果需要多张图片甚至再加一个布局…
那一个游戏要是有几百个按钮怎么办呢?
于是:以下代码被酝酿出来了:
- /**
- * 按下这个按钮进行的颜色过滤
- */
- public final static float [] BT_SELECTED= new float [] {
- 2 , 0 , 0 , 0 , 2 ,
- 0 , 2 , 0 , 0 , 2 ,
- 0 , 0 , 2 , 0 , 2 ,
- 0 , 0 , 0 , 1 , 0 };
- /**
- * 按钮恢复原状的颜色过滤
- */
- public final static float [] BT_NOT_SELECTED= new float [] {
- 1 , 0 , 0 , 0 , 0 ,
- 0 , 1 , 0 , 0 , 0 ,
- 0 , 0 , 1 , 0 , 0 ,
- 0 , 0 , 0 , 1 , 0 };
- /**
- * 按钮焦点改变
- */
- public final static OnFocusChangeListener buttonOnFocusChangeListener= new OnFocusChangeListener() {
- @Override
- public void onFocusChange(View v, boolean hasFocus) {
- if (hasFocus) {
- v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_SELECTED));
- v.setBackgroundDrawable(v.getBackground());
- }
- else
- {
- v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_NOT_SELECTED));
- v.setBackgroundDrawable(v.getBackground());
- }
- }
- };
- /**
- * 按钮触碰按下效果
- */
- public final static OnTouchListener buttonOnTouchListener= new OnTouchListener() {
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- if (event.getAction() == MotionEvent.ACTION_DOWN){
- v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_SELECTED));
- v.setBackgroundDrawable(v.getBackground());
- }
- else if (event.getAction() == MotionEvent.ACTION_UP){
- v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_NOT_SELECTED));
- v.setBackgroundDrawable(v.getBackground());
- }
- return false ;
- }
- };
- /**
- * 设置图片按钮获取焦点改变状态
- * @param inImageButton
- */
- public final static void setButtonFocusChanged(View inView)
- {
- inView.setOnTouchListener(buttonOnTouchListener);
- inView.setOnFocusChangeListener(buttonOnFocusChangeListener);
- }
- /**
- * 按下这个按钮进行的颜色过滤
- */
- public final static float [] BT_SELECTED= new float [] {
- 2 , 0 , 0 , 0 , 2 ,
- 0 , 2 , 0 , 0 , 2 ,
- 0 , 0 , 2 , 0 , 2 ,
- 0 , 0 , 0 , 1 , 0 };
- /**
- * 按钮恢复原状的颜色过滤
- */
- public final static float [] BT_NOT_SELECTED= new float [] {
- 1 , 0 , 0 , 0 , 0 ,
- 0 , 1 , 0 , 0 , 0 ,
- 0 , 0 , 1 , 0 , 0 ,
- 0 , 0 , 0 , 1 , 0 };
- /**
- * 按钮焦点改变
- */
- public final static OnFocusChangeListener buttonOnFocusChangeListener= new OnFocusChangeListener() {
- @Override
- public void onFocusChange(View v, boolean hasFocus) {
- if (hasFocus) {
- v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_SELECTED));
- v.setBackgroundDrawable(v.getBackground());
- }
- else
- {
- v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_NOT_SELECTED));
- v.setBackgroundDrawable(v.getBackground());
- }
- }
- };
- /**
- * 按钮触碰按下效果
- */
- public final static OnTouchListener buttonOnTouchListener= new OnTouchListener() {
- @Override
- public boolean onTouch(View v, MotionEvent event) {
- if (event.getAction() == MotionEvent.ACTION_DOWN){
- v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_SELECTED));
- v.setBackgroundDrawable(v.getBackground());
- }
- else if (event.getAction() == MotionEvent.ACTION_UP){
- v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_NOT_SELECTED));
- v.setBackgroundDrawable(v.getBackground());
- }
- return false ;
- }
- };
- /**
- * 设置图片按钮获取焦点改变状态
- * @param inImageButton
- */
- public final static void setButtonFocusChanged(View inView)
- {
- inView.setOnTouchListener(buttonOnTouchListener);
- inView.setOnFocusChangeListener(buttonOnFocusChangeListener);
- }
使用时,调用方法
public final static void setButtonFocusChanged(View inView)
即可。
【原理】
利用 Drawable 类的 setColorFilter 方法对图片进行颜色偏移过滤处理。
以下为效果图,登陆按钮此时为获取焦点状态。
代码可以适当修改实现 3 个不同的状态:正常,获取焦点,点击。