View getLocationInWindow getLocationOnScreen

最新推荐文章于 2022-06-20 10:36:26 发布

最新推荐文章于 2022-06-20 10:36:26 发布 · 159 阅读

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#ui

本文介绍了如何在Android应用中通过获取View的测量高度和窗口管理器的显示元数据，来计算某个View相对于主View的y坐标。通过这种方式，开发者可以更精确地定位和调整界面元素，提升用户体验。

I ended up solving this issue by determining the height of the status/notification bar like so:

View globalView = ...; // the main view of my activity/application DisplayMetrics dm = new DisplayMetrics(); this.getWindowManager().getDefaultDisplay().getMetrics(dm); int topOffset = dm.heightPixels - globalView.getMeasuredHeight(); View tempView = ...; // the view you'd like to locate int[] loc = new int[2]; tempView.getLocationOnScreen(loc); final int y = loc[1] - topOffset;

这段代码的作用是，在View中（不包含title）计算某个view相对Main View的y坐标

int[] location = new int[2] ;
view.getLocationInWindow(location); //获取在当前窗口内的绝对坐标
view.getLocationOnScreen(location);//获取在整个屏幕内的绝对坐标
location [0]--->x坐标,location [1]--->y坐标
如果在Activity的OnCreate()事件输出那些参数，是全为0，要等UI控件都加载完了才能获取到这些。

private ViewFlipper flipper; @Override public void onCreate(Bundle savedInstanceState) { Log.i("demo", "onCreate"); super.onCreate(savedInstanceState); setContentView(R.layout.main); flipper = (ViewFlipper)findViewById(R.id.flipper); Log.d("demo", "left:" + flipper.getLeft()); Log.d("demo", "right:" + flipper.getRight()); Log.d("demo", "Top:" + flipper.getTop()); Log.d("demo", "Bottom:" + flipper.getBottom()); Button btn = (Button)findViewById(R.id.button2); btn.setOnClickListener(new OnClickListener(){ public void onClick(View v) { Log.i("demo", "onClick"); Log.d("demo", "left:" + flipper.getLeft()); Log.d("demo", "right:" + flipper.getRight()); Log.d("demo", "Top:" + flipper.getTop()); Log.d("demo", "Bottom:" + flipper.getBottom()); } }); }