Xposed修改屏幕分辨率，5种方法

最近在借助Xposed写一个改机工具来测试公司的安全产品的有效性，发现DeviceInfoHw这个App获取到的分辨率，用网上已有的方法怎么都Hook不掉。
通过Jadx反编译发现，DeviceInfoHw创新性地调用了Display类的getSupportedModes方法。由于涉及到私有成员变量，我使用反射成功实现了Hook。
在谷歌和Github上搜了下，这应该是全网第一个研究出这个方法的:)
为大家总结出了工具函数如下：

public void hookResolution2(XC_LoadPackage.LoadPackageParam lpparam, int width, int height) {
        // 反编译DeviceInfoHw后，发现的获取分辨率的新方法。需要用到反射
        // 1. 目标函数：getSupportedModes()
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
            XposedHelpers.findAndHookMethod(Display.class, "getSupportedModes", new XC_MethodHook(XCallback.PRIORITY_LOWEST) {
                @Override
                protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                    super.afterHookedMethod(param);
                    Display.Mode[] modes = (Display.Mode[]) param.getResult();
                    if (modes.length > 0) {
                        Display.Mode firstMode = modes[0];
                        Field mWidthField = Display.Mode.class.getDeclaredField("mWidth");
                        Field mHeightField = Display.Mode.class.getDeclaredField("mHeight");
                        mWidthField.setAccessible(true);
                        mHeightField.setAccessible(true);
                        mWidthField.set(firstMode, width);
                        mHeightField.set(firstMode, height);
                        modes[0] = firstMode;
                    }
                    param.setResult(modes);
                }
            });
        }

        // 2. 目标函数：getMetrics(DisplayMetrics outMetrics)
        XposedHelpers.findAndHookMethod(Display.class, "getMetrics", DisplayMetrics.class, new XC_MethodHook(XCallback.PRIORITY_LOWEST) {
            @Override
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                DisplayMetrics metrics = (DisplayMetrics) param.args[0];
                metrics.widthPixels = width;
                metrics.heightPixels = height;
            }
        });

        // 3. 目标函数：getRealMetrics(DisplayMetrics outMetrics)
        XposedHelpers.findAndHookMethod(Display.class, "getRealMetrics", DisplayMetrics.class, new XC_MethodHook(XCallback.PRIORITY_LOWEST) {
            @Override
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                DisplayMetrics metrics = (DisplayMetrics) param.args[0];
                metrics.widthPixels = width;
                metrics.heightPixels = height;
            }
        });

        // 4. 目标函数：getSize(Point outSize)
        XposedHelpers.findAndHookMethod(Display.class, "getSize", Point.class, new XC_MethodHook(XCallback.PRIORITY_LOWEST) {
            @Override
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                Point mPoint = (Point) param.args[0];
                mPoint.x = width;
                mPoint.y = height;
            }
        });

        // 5. 目标函数：getWidth()、getHeight()、
        XposedHelpers.findAndHookMethod(Display.class, "getWidth", new XC_MethodHook() {
            @Override
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                super.afterHookedMethod(param);
                param.setResult(width);
            }
        });
        XposedHelpers.findAndHookMethod(Display.class, "getHeight", new XC_MethodHook() {
            @Override
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                super.afterHookedMethod(param);
                param.setResult(height);
            }
        });
    }

部分代码（2-5）参考自：https://github.com/Dovar66/FakerMobile/blob/master/app/src/main/java/com/dovar/fakermobile/fms/Resolution.java