().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,R.drawable.qq);getWindow

.drawable.qq 为自己想要更换的图标。其中 R

注意在写改行代码之前先加一：requestWindowFeature(Window.FEATURE_LEFT_ICON);

不然会报错说没有要求Window.FEATURE_LEFT_ICON这个属性

而且该句代码要加在setContentView之前，不然也会报错说没有加在该函数之前。

01.public class Test01 extends Activity {

02. /** Called when the activity is first created. */

03. @Override

04. public void onCreate(Bundle savedInstanceState) {

05. super.onCreate(savedInstanceState);

06. requestWindowFeature(Window.FEATURE_LEFT_ICON);

07. setContentView(R.layout.main);

08. getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,

09. R.drawable.qq);

10. }

11.}