设置在左边的图标

 　　getWindow().requestFeature(Window.FEATURE_LEFT_ICON);
        setContentView(R.layout.main);
        getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON, R.drawable.pic1);

设置在右边的图标

 　　getWindow().requestFeature(Window.FEATURE_RIGHT_ICON);
        setContentView(R.layout.main);
        getWindow().setFeatureDrawableResource(Window.FEATURE_RIGHT_ICON, R.drawable.pic1);

注意：getWindow().requestFeature(Window.FEATURE_LEFT_ICON);必须要在setContentView前面使用