andorid12 截图方法 screenshot_android screenshot

//android 12之前的截图方式
	 /**
     * 应用内截屏
     *
     * @param activity 截屏的activity
     * @return 截屏图片
     */
    public static Bitmap takeScreenShot(Activity activity) {
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);
        view.buildDrawingCache();
        Bitmap b1 = view.getDrawingCache();

        Bitmap bmp = Bitmap.createBitmap(b1, 0, 0, b1.getWidth(), b1.getHeight());
        view.destroyDrawingCache();
        return bmp;
    }

     /**
     * 获取系统界面截屏，需要系统权限（an12删除了该方法）
     *
     * @param mContext
     * @return
     */
    public static Bitmap screenshot(Context mContext) {
        Display display = mContext.getDisplay();
        DisplayMetrics metrics = new DisplayMetrics();
        display.getRealMetrics(metrics);

        String surfaceClass = "android.view.SurfaceControl";
        Class<?> surfaceClazz;
        Bitmap bm = null;
        try {
            surfaceClazz = Class.forName(surfaceClass);
            Method method = surfaceClazz.getMethod("screenshot", Rect.class,
                    int.class, int.class, int.class);
            // 分辨率
            Object[] values = new Object[]{
                    new Rect(0, 0, metrics.widthPixels, metrics.heightPixels),
                    metrics.widthPixels,
                    metrics.heightPixels,
                    display.getRotation()};
            bm = (Bitmap) method.invoke(surfaceClazz, values);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return bm;
    }

     /**
     * Android12 获取界面截屏 需要framework.jar
     *
     * @param context
     * @return
     */
    public static Bitmap screenshot12(Context context) {
        Bitmap bm = null;
        final DisplayManager mDisplayManager = requireNonNull(context.getSystemService(DisplayManager.class));
        final Display display = mDisplayManager.getDisplay(DEFAULT_DISPLAY);
        DisplayMetrics metrics = new DisplayMetrics();
        display.getRealMetrics(metrics);
        int width = metrics.widthPixels;
        int height = metrics.heightPixels;
        Rect crop = new Rect(0, 0, width, height);
        final DisplayAddress address = display.getAddress();
        if (!(address instanceof DisplayAddress.Physical)) {
            Log.e("screenshot", "Skipping Screenshot - Default display does not have a physical address: "
                    + display);
        } else {
            final DisplayAddress.Physical physicalAddress = (DisplayAddress.Physical) address;

            final IBinder displayToken = SurfaceControl.getPhysicalDisplayToken(
                    physicalAddress.getPhysicalDisplayId());
            final SurfaceControl.DisplayCaptureArgs captureArgs =
                    new SurfaceControl.DisplayCaptureArgs.Builder(displayToken)
                            .setSourceCrop(crop)
                            .setSize(width, height)
                            .build();
            final SurfaceControl.ScreenshotHardwareBuffer screenshotBuffer =
                    SurfaceControl.captureDisplay(captureArgs);
            bm = screenshotBuffer == null ? null : screenshotBuffer.asBitmap();
        }
        return bm;
    }
    
    // 需在项目的build.gradle添加以下代码，不然找不到方法
    allprojects {
  	  String path = getRootDir().getAbsolutePath() + '/app/libs/framework.jar'
  	  gradle.projectsEvaluated {
  	      tasks.withType(JavaCompile) {
  	          println(path)
   	         options.compilerArgs << '-Xbootclasspath/p:' + path
   	     }
   	  }
   }
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screenshot12 方法来源：
frameworks/base/packages/SystemUI/src/com/android/systemui/screenshot/ScreenshotController.java

	private Bitmap captureScreenshot(Rect crop) {
        int width = crop.width();
        int height = crop.height();
        Bitmap screenshot = null;
        final Display display = getDefaultDisplay();
        final DisplayAddress address = display.getAddress();
        if (!(address instanceof DisplayAddress.Physical)) {
            Log.e(TAG, "Skipping Screenshot - Default display does not have a physical address: "
                    + display);
        } else {
            final DisplayAddress.Physical physicalAddress = (DisplayAddress.Physical) address;

            final IBinder displayToken = SurfaceControl.getPhysicalDisplayToken(
                    physicalAddress.getPhysicalDisplayId());
            final SurfaceControl.DisplayCaptureArgs captureArgs =
                    new SurfaceControl.DisplayCaptureArgs.Builder(displayToken)
                            .setSourceCrop(crop)
                            .setSize(width, height)
                            .build();
            final SurfaceControl.ScreenshotHardwareBuffer screenshotBuffer =
                    SurfaceControl.captureDisplay(captureArgs);
            screenshot = screenshotBuffer == null ? null : screenshotBuffer.asBitmap();
        }
        return screenshot;
    }
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或许可以通过反射的方式调用该方法

编译源码，生成的framework.jar路径(暂时找到的这个是模块最全的)：
out\soong\.intermediates\frameworks\base\framework-all\android_common\combined
改个名字即可，该目录jar包未必包含所有模块，可以从其他jar包复制进来