我正在尝试创建具有3D效果的平面按钮,当您单击该按钮时会按下
我为可点击的文本视图设置了样式,并带有一个选择器,该选择器显示了未按下的版本和已按下的版本。麻烦的是我不知道如何使文本看起来像背景一样移动,即看起来应该像是按下了物理键,所以按下文本时会向下移动一点,释放文本时会返回。这是我的代码。
我要设置样式的TextView /按钮:
<TextView
android:id="@+id/chip_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:paddingLeft="15dp"
android:paddingRight="15dp"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:ellipsize="end"
android:singleLine="true"
android:scrollHorizontally="false"
android:textColor="@color/speedDialText"
android:background="@drawable/chip_view_selector"
/>
chip_view_selector.xml:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="false">
<layer-list>
<item android:drawable="@drawable/chip_view_shadow" android:top="4dp"/>
<item android:drawable="@drawable/chip_view_btn_face" android:bottom="4dp"/>
</layer-list>
</item>
<item android:state_pressed="true">
<layer-list>
<item android:drawable="@drawable/chip_view_shadow" android:top="4dp"/>
<item android:drawable="@drawable/chip_view_btn_face" android:top="4dp" android:bottom="1dp" />
</layer-list>
</item>
</selector>
chip_view_btn_face.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<!-- Button foreground -->
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@color/speedDialButtonBackground" />
<padding
android:left="1dp"
android:right="1dp"
android:bottom="1dp"
android:top="1dp" />
<corners android:radius="6dp" />
</shape>
</item>
</selector>
chip_view_shadow.xml(实际上不是阴影,而是使它具有3d外观的底层):
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<!-- 3d effect part of button (not the button face) -->
<shape>
<solid android:color="#D3D3D3" />
<corners android:radius="6dp" />
</shape>
</item>
</selector>
public class VariableGravityButton extends Button {
public VariableGravityButton(Context context) {
super(context);
}
public VariableGravityButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
public VariableGravityButton(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void setPressed(boolean pressed) {
if (pressed != isPressed()) {
setGravity(pressed ? Gravity.CENTER_HORIZONTAL |
Gravity.BOTTOM : Gravity.CENTER);
}
super.setPressed(pressed);
}}
有时,扩展按钮-可能会出错,不要害怕,请继续。然后使用按钮:您的包名称+上面的类名称,如下所示:
<android.learning.learning.VariableGravityButton
android:id="@+id/chip_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="15dp"
android:paddingRight="15dp"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:textColor="@color/speedDialText"
android:background="@drawable/chip_view_selector"/>
此按钮文本在按下时将跳到底部。