Android——ImageButton按下效果设计
使用Button时为了让用户有“按下”的效果，有两种实现方式：
1.Java代码实现：
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.XML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，使用方法如下：
<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>
?3.采用Drawable的颜色过滤：
/** * 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。
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FROM:?http://blog.csdn.net/sytzz/archive/2010/06/16/5673662.aspx