android - 安卓裁剪系统自带的图片的这些参数去哪里查阅？

Answer 1

这段代码调用的是系统的图片裁剪类，有兴趣可去看系统裁剪器源码

/packages/apps/Gallery2/src/com/android/gallery3d/filltershow/crop/CropActivity.java

这个Activity接收处理"com.android.camera.action.CROP"的Action，里边有个方法

    protected static CropExtras getExtrasFromIntent(Intent intent) {
        Bundle extras = intent.getExtras();
        if (extras != null) {
            return new CropExtras(extras.getInt(CropExtras.KEY_OUTPUT_X, 0),
                    extras.getInt(CropExtras.KEY_OUTPUT_Y, 0),
                    extras.getBoolean(CropExtras.KEY_SCALE, true) &&
                            extras.getBoolean(CropExtras.KEY_SCALE_UP_IF_NEEDED, false),
                    extras.getInt(CropExtras.KEY_ASPECT_X, 0),
                    extras.getInt(CropExtras.KEY_ASPECT_Y, 0),
                    extras.getBoolean(CropExtras.KEY_SET_AS_WALLPAPER, false),
                    extras.getBoolean(CropExtras.KEY_RETURN_DATA, false),
                    (Uri) extras.getParcelable(MediaStore.EXTRA_OUTPUT),
                    extras.getString(CropExtras.KEY_OUTPUT_FORMAT),
                    extras.getBoolean(CropExtras.KEY_SHOW_WHEN_LOCKED, false),
                    extras.getFloat(CropExtras.KEY_SPOTLIGHT_X),
                    extras.getFloat(CropExtras.KEY_SPOTLIGHT_Y));
        }
        return null;
    }

再来看CropExtras类

/packages/apps/Gallery2/src/com/android/gallery3d/filltershow/crop/CropExtras.java

里边定义了常量

public static final String KEY_CROPPED_RECT = "cropped-rect";
    public static final String KEY_OUTPUT_X = "outputX";
    public static final String KEY_OUTPUT_Y = "outputY";
    public static final String KEY_SCALE = "scale";
    public static final String KEY_SCALE_UP_IF_NEEDED = "scaleUpIfNeeded";
    public static final String KEY_ASPECT_X = "aspectX";
    public static final String KEY_ASPECT_Y = "aspectY";
    public static final String KEY_SET_AS_WALLPAPER = "set-as-wallpaper";
    public static final String KEY_RETURN_DATA = "return-data";
    public static final String KEY_DATA = "data";
    public static final String KEY_SPOTLIGHT_X = "spotlightX";
    public static final String KEY_SPOTLIGHT_Y = "spotlightY";
    public static final String KEY_SHOW_WHEN_LOCKED = "showWhenLocked";
    public static final String KEY_OUTPUT_FORMAT = "outputFormat";