Android背景颜色滑动渐变效果（上下滑动，左右滑动，安卓面试项目经验

5.获取控件与屏幕高度(宽度)的比例，根据比例设置颜色个数

java代码如下：

public class BaseActivity extends Activity {

private LinearLayout ll_base;

private int heights;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_base);

initView();

}

private void initView() {

ll_base = (LinearLayout) findViewById(R.id.ll_base);

}

@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)

@Override

public void onWindowFocusChanged(boolean hasFocus) {

super.onWindowFocusChanged(hasFocus);

heights = ll_base.getMeasuredHeight();

float coloramount=getScreenHeightScale(heights);

if (coloramount>=0&&coloramount<1.5f){

GradientDrawable aDrawable = new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM,