• 获取Android设备屏幕分辨率

    1.Android 4.3引入的wm工具：

    a.获取Android设备屏幕分辨率： adb shell wm size

    b.获取android设备屏幕密度： adb shell wm density

    Wm.java

    public class Wm extends BaseCommand {
...
public void onShowUsage(PrintStream out) {
        out.println(
                "usage: wm [subcommand] [options]
" +
                "       wm size [reset|WxH]
" +
                "       wm density [reset|DENSITY]
" +
                "       wm overscan [reset|LEFT,TOP,RIGHT,BOTTOM]
" +
                "
" +
                "wm size: return or override display size.
" +
                "
" +
                "wm density: override display density.
" +
                "
" +
                "wm overscan: set overscan area for display.
"
                );
    }

    public void onRun() throws Exception {
        mWm = IWindowManager.Stub.asInterface(ServiceManager.checkService(
                        Context.WINDOW_SERVICE));
        if (mWm == null) {
            System.err.println(NO_SYSTEM_ERROR_CODE);
            throw new AndroidException("Can't connect to window manager; is the system running?");
        }

        String op = nextArgRequired();

        if (op.equals("size")) {
            runDisplaySize();
        } else if (op.equals("density")) {
            runDisplayDensity();
        } else if (op.equals("overscan")) {
            runDisplayOverscan();
        } else {
            showError("Error: unknown command '" + op + "'");
            return;
        }
    }

    private void runDisplaySize() throws Exception {
        String size = nextArg();
        int w, h;
        if (size == null) {
            Point initialSize = new Point();
            Point baseSize = new Point();
            try {
                mWm.getInitialDisplaySize(Display.DEFAULT_DISPLAY, initialSize);
                mWm.getBaseDisplaySize(Display.DEFAULT_DISPLAY, baseSize);
                System.out.println("Physical size: " + initialSize.x + "x" + initialSize.y);
                if (!initialSize.equals(baseSize)) {
                    System.out.println("Override size: " + baseSize.x + "x" + baseSize.y);
                }
            } catch (RemoteException e) {
            }
            return;
        } else if ("reset".equals(size)) {
            w = h = -1;
        } else {
            int div = size.indexOf('x');
            if (div <= 0 || div >= (size.length()-1)) {
                System.err.println("Error: bad size " + size);
                return;
            }
            String wstr = size.substring(0, div);
            String hstr = size.substring(div+1);
            try {
                w = Integer.parseInt(wstr);
                h = Integer.parseInt(hstr);
            } catch (NumberFormatException e) {
                System.err.println("Error: bad number " + e);
                return;
            }
        }

        try {
            if (w >= 0 && h >= 0) {
                // TODO(multidisplay): For now Configuration only applies to main screen.
                mWm.setForcedDisplaySize(Display.DEFAULT_DISPLAY, w, h);
            } else {
                mWm.clearForcedDisplaySize(Display.DEFAULT_DISPLAY);
            }
        } catch (RemoteException e) {
        }
    }

    private void runDisplayDensity() throws Exception {
        String densityStr = nextArg();
        int density;
        if (densityStr == null) {
            try {
                int initialDensity = mWm.getInitialDisplayDensity(Display.DEFAULT_DISPLAY);
                int baseDensity = mWm.getBaseDisplayDensity(Display.DEFAULT_DISPLAY);
                System.out.println("Physical density: " + initialDensity);
                if (initialDensity != baseDensity) {
                    System.out.println("Override density: " + baseDensity);
                }
            } catch (RemoteException e) {
            }
            return;
        } else if ("reset".equals(densityStr)) {
            density = -1;
        } else {
            try {
                density = Integer.parseInt(densityStr);
            } catch (NumberFormatException e) {
                System.err.println("Error: bad number " + e);
                return;
            }
            if (density < 72) {
                System.err.println("Error: density must be >= 72");
                return;
            }
        }

        try {
            if (density > 0) {
                // TODO(multidisplay): For now Configuration only applies to main screen.
                mWm.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, density);
            } else {
                mWm.clearForcedDisplayDensity(Display.DEFAULT_DISPLAY);
            }
        } catch (RemoteException e) {
        }
    }
...
    View Code

    WindowManagerService.java

    View Code

    DisplayContent.java

    DisplayManager.java

    View Code

    2.显示区域分为应用显示区域和真实显示区域。

    a.应用显示区域不包括系统点缀，它可能比真实显示区域小因为系统减掉了点缀元素的空间如导航栏（隐藏/显示导航栏得到的高度不同）

    View Code

    Display.java

    View Code

    DisplayInfo.java

    View Code

    b.真实显示区域包括系统点缀，但它有可能比物理显示小当窗口管理器模拟更小显示（如使用adb shell am display-size）时

    View Code
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  • 原文地址：https://www.cnblogs.com/fanfeng/p/3263853.html
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