代码中设置drawableright

TextView的xml

[html]view plaincopy

android:id="@+id/textciew1"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:background="#000"

android:drawableRight="@drawable/button_nav_down"

android:gravity="center_vertical"

android:paddingLeft="16dp"

android:paddingRight="16dp"

android:text="展开"

android:textColor="#fff"

/>

在代码中如果要修改drawableRight设置的图片可以使用

setCompoundDrawables(Drawableleft,Drawabletop,Drawableright,Drawablebottom)

Drawable可以通过 Drawable nav_up=getResources().getDrawable(R.drawable.button_nav_up);得到

但是API提示,setCompoundDrawables()调用的时候,Drawable对象必须调用setBounds(int left, int top, int right, int bottom)方法,于是我们加一行代码就可以了

[java]view plaincopy

nav_up.setBounds(0,0, nav_up.getMinimumWidth(), nav_up.getMinimumHeight());

代码合在一起是这样的:

[java]view plaincopy

Drawable nav_up=getResources().getDrawable(R.drawable.button_nav_up);

nav_up.setBounds(0,0, nav_up.getMinimumWidth(), nav_up.getMinimumHeight());

textview1.setCompoundDrawables(null,null, nav_up,null);

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