关于android:IWindowManageraidl的使用

环境

win10 + android studio

文件

IRotationWatcher.aidl

package android.view;

interface IRotationWatcher {void onRotationChanged(int rotation);
}

IWindowManager.aidl

// IWindowManager.aidl
package android.view;

import android.graphics.Point;
import android.view.IRotationWatcher;

/***
 * Define this same aidl file here to make it compiling when calling system hidden APIs.
 *
 * According to the 'delegation model' for loading classes on Java plattform, the actual
 * implementation of IWindowManager from the Framework will be applied.
 */
interface IWindowManager {void getInitialDisplaySize(int displayId, out Point size);

    void getBaseDisplaySize(int displayId, out Point size);

    void getRealDisplaySize(out Point paramPoint);

    /**
     * Remove a rotation watcher set using watchRotation.
     * @hide
     */
    void removeRotationWatcher(IRotationWatcher watcher);
}

配置

在我的项目内创立 aidl 文件目录

留神我的项目包名必须与零碎包名统一否则报错
文件配置好后须要
build->make project
这样在我的项目文件内就能够应用了

DisplayUtil.java 工具类

package com.xxx.xxx;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.Point;
import android.os.Build;
import android.os.IBinder;
import android.os.RemoteException;
import android.view.Display;
import android.view.IRotationWatcher;
import android.view.IWindowManager;

import java.lang.reflect.Method;

/** Created by Sean on 5/27/17. */
/* package */ final class DisplayUtil {

    private IWindowManager iWindowManager;

    @SuppressLint("PrivateApi")
    public DisplayUtil() {
        Class<?> serviceManagerClass = null;

        try {serviceManagerClass = Class.forName("android.os.ServiceManager");

            Method getService = serviceManagerClass.getDeclaredMethod("getService", String.class);

            // WindowManager
            Object ws = getService.invoke(null, Context.WINDOW_SERVICE);

            iWindowManager = IWindowManager.Stub.asInterface((IBinder) ws);

        } catch (Exception e) {e.printStackTrace();
        }
    }

    /**
     * * Retrieves the device actual display size.
     *
     * @return {@link Point}
     */
    Point getCurrentDisplaySize() {
        try {Point localPoint = new Point();

            // Resolve the screen resolution for devices with OS version 4.3+
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {iWindowManager.getInitialDisplaySize(0, localPoint);
            } else {// void getDisplaySize(out Point size)
                Point out = new Point();

                iWindowManager
                        .getClass()
                        .getMethod("getDisplaySize", Point.class)
                        .invoke(iWindowManager, out);
                if (out.x > 0 && out.y > 0) {localPoint = out;}
            }

            System.out.println(">>> Dimension:" + localPoint);
            return localPoint;

        } catch (Exception e) {e.printStackTrace();
        }
        return null;
    }

    /**
     * Retrieve the current orientation of the primary screen.
     *
     * @return Constant as per {@link android.view.Surface.Rotation}.
     * @see Display#DEFAULT_DISPLAY
     */
    int getScreenRotation() {
        int rotation = 0;

        try {Class<?> cls = iWindowManager.getClass();
            try {rotation = (Integer) cls.getMethod("getRotation").invoke(iWindowManager);
            } catch (NoSuchMethodException e) {
                rotation =
                        (Integer) cls.getMethod("getDefaultDisplayRotation").invoke(iWindowManager);
            }
        } catch (Exception e) {e.printStackTrace();
        }
        System.out.println(">>> Screen rotation:" + rotation);

        return rotation;
    }

    void setRotateListener(RotateListener listener) {
        try {Class<?> clazz = iWindowManager.getClass();

            IRotationWatcher watcher =
                    new IRotationWatcher.Stub() {
                        @Override
                        public void onRotationChanged(int rotation) throws RemoteException {if (listener != null) {listener.onRotate(rotation);
                            }
                        }
                    };

            try {clazz.getMethod("watchRotation", IRotationWatcher.class, int.class)
                        .invoke(iWindowManager, watcher, Display.DEFAULT_DISPLAY); // 26+

            } catch (NoSuchMethodException ex) {clazz.getMethod("watchRotation", IRotationWatcher.class)
                        .invoke(iWindowManager, watcher);
            }

        } catch (Exception e) {e.printStackTrace();
        }
    }

    Bitmap rotateBitmap(Bitmap bitmap, float degree) {Matrix matrix = new Matrix();
        matrix.postRotate(degree);

        return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
    }

    interface RotateListener {void onRotate(int rotate);
    }
}

应用

DisplayUtil du = new DisplayUtil();
Point size = du.getCurrentDisplaySize();
// 屏幕分辩率
System.out.println(size.x);
System.out.println(size.y);

起源：https://github.com/rayworks/D…