ApplicationFramework层

ActivityManager

PackageManager

WindowManager

TelphonyManager

ContentProvider

ResourceManager

ViewSystem

LocationManager

NotificationManager

XMPPService

获取LinearLayout的长宽

View view = getLayoutInflater().inflate(R.layout.main, null);

LinearLayout linearLayout = (LinearLayout) view.findViewById(R.id.linearLayout);

linearLayout.measure(0, 0);

int width = linearLayout.getMeasuredWidth();

int height = linearLayout.getMeasuredHeight();

获取按钮在屏幕上的坐标

View view = findViewById(R.id.button1);

int[] locations = new int[2];

view.getLocationOnScreen(locations);

int x = locations[0];

int y = locations[1];

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