如何使按钮的大小在按下时略微增加并在释放时再次减小?这是为了突出显示按下的按钮,除了使用不同的颜色外,还使用大小。
问候,琪琪
创建一个字段,并在与之关联的情况下修改Button
其大小。OnTouchListener
使用 OnTouchListener 您可以监听不同的MotionEvents
,例如ACTION_DOWN
和ACTION_UP
。
从 API 21 (Lollipop) 开始,基于stateListAnimator属性的 xml 解决方案可用。尽管它的主要目标是根据状态更改为视图属性设置动画,但如果需要,您可以通过设置来禁用动画duration="0"
。例如:
<!-- res/layout/my_layout.xml -->
<LinearLayout ...
android:stateListAnimator="@animator/zoom_animator">...</layout>
<!-- res/animator/zoom_animator -->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<set>
<objectAnimator android:propertyName="scaleX" android:valueTo="1.0" android:duration="0" />
<objectAnimator android:propertyName="scaleY" android:valueTo="1.0" android:duration="0" />
</set>
</item>
<item android:state_pressed="true">
<set>
<objectAnimator android:propertyName="scaleX" android:valueTo="1.1" android:duration="0" />
<objectAnimator android:propertyName="scaleY" android:valueTo="1.1" android:duration="0" />
</set>
</item>
</selector>
关于动画比例还有两个类似的问题:
button.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) v.getLayoutParams();
//Code to convert height and width in dp.
int height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 35, getResources().getDisplayMetrics());
int width = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 140, getResources().getDisplayMetrics());
if (event.getAction() == MotionEvent.ACTION_DOWN) {
layoutParams.width = width + 5;
layoutParams.height = height + 5;
SearchButton.setLayoutParams(layoutParams);
}
if (event.getAction() == MotionEvent.ACTION_UP) {
layoutParams.width = width;
layoutParams.height = height;
SearchButton.setLayoutParams(layoutParams);
}
return false;
}
});
在你的活动中
Private Button myButton;
//...
protected void onCreate(Bundle savedInstanceState) {
//...
myButton = (Button) findViewById(R.id.my_button);
_button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
myButton.setWidth(50);
myButton.setHeight(50);
}
});
}
//Try it
Private Button myButton;
//...
protected void onCreate(Bundle savedInstanceState) {
//...
myButton = (Button) findViewById(R.id.my_button);
_button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
myButton.setWidth(myButton.getWidth()+5);
myButton.setHeight(myButton.getHeight()+5);
}
});
}