我在动态创建按钮。我首先使用XML样式他们,我试图采取下面的XML,使其编程。

<Button
    android:id="@+id/buttonIdDoesntMatter"
    android:layout_height="wrap_content"
    android:layout_width="fill_parent"
    android:text="buttonName"
    android:drawableLeft="@drawable/imageWillChange"
    android:onClick="listener"
    android:layout_width="fill_parent">
</Button>

这是我目前得到的。我什么都能做,就是画不出来。

linear = (LinearLayout) findViewById(R.id.LinearView);
Button button = new Button(this);
button.setText("Button");
button.setOnClickListener(listener);
button.setLayoutParams(
    new LayoutParams(
        android.view.ViewGroup.LayoutParams.FILL_PARENT,         
        android.view.ViewGroup.LayoutParams.WRAP_CONTENT
    )
);      

linear.addView(button);

当前回答

试试这个:

((Button)btn).getCompoundDrawables()[0].setAlpha(btn.isEnabled() ? 255 : 100);

其他回答

我是这样做的:

 // Left, top, right, bottom drawables.
            Drawable[] drawables = button.getCompoundDrawables();
            // get left drawable.
            Drawable leftCompoundDrawable = drawables[0];
            // get new drawable.
            Drawable img = getContext().getResources().getDrawable(R.drawable.ic_launcher);
            // set image size (don't change the size values)
            img.setBounds(leftCompoundDrawable.getBounds());
            // set new drawable
            button.setCompoundDrawables(img, null, null, null);

如果你正在使用drawableStart, drawableEnd, drawableTop或drawableBottom;你必须使用“setCompoundDrawablesRelativeWithIntrinsicBounds”

edittext.setCompoundDrawablesRelativeWithIntrinsicBounds(0, 0, R.drawable.anim_search_to_close, 0)

试试这个:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
     fillButton[i].setBackground(getBaseContext().getResources().getDrawable(R.drawable.drawable_name));
}
else {
    fillButton[i].setBackgroundColor(Color.argb(255,193,234,203));
}

下面是改变编辑文本中左侧图标的颜色并将其设置在左侧的方法。

 Drawable img = getResources().getDrawable( R.drawable.user );
img.setBounds( 0, 0, 60, 60 );
mNameEditText.setCompoundDrawables(img,null, null, null);

int color = ContextCompat.getColor(this, R.color.blackColor);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    DrawableCompat.setTint(img, color);

} else {
    img.mutate().setColorFilter(color, PorterDuff.Mode.SRC_IN);
}

@Jérémy Reynaud指出,正如在这个回答中所描述的,在不改变其他可绘制对象(顶部、右侧和底部)的值的情况下设置左侧可绘制对象最安全的方法是使用setCompoundDrawablesWithIntrinsicBounds按钮中的先前值:

Drawable leftDrawable = getContext().getResources()
                          .getDrawable(R.drawable.yourdrawable);

// Or use ContextCompat
// Drawable leftDrawable = ContextCompat.getDrawable(getContext(),
//                                        R.drawable.yourdrawable);

Drawable[] drawables = button.getCompoundDrawables();
button.setCompoundDrawablesWithIntrinsicBounds(leftDrawable,drawables[1],
                                               drawables[2], drawables[3]);

所以你之前画的东西都会被保留。