android 图片编辑旋转，放大缩小，剪裁，网格等

package com.yalantis.ucrop.sample;

import android.content.DialogInterface;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;

/**
 * Created by Oleksii Shliama （https://github.com/shliama）.
 */
public class baseActivity extends AppCompatActivity {

    protected static final int REQUEST_STORAGE_READ_ACCESS_PERMISSION = 101;
    protected static final int REQUEST_STORAGE_WRITE_ACCESS_PERMISSION = 102;

    private AlertDialog mAlertDialog;

    /**
     * Hide alert dialog if any.
     */
    @Override
    protected void onstop（） {
        super.onstop（）;
        if （mAlertDialog != null && mAlertDialog.isShowing（）） {
            mAlertDialog.dismiss（）;
        }
    }


    /**
     * Requests given permission.
     * If the permission has been denied previously a Dialog will prompt the user to grant the
     * permission otherwise it is requested directly.
     */
    protected void requestPermission（final String permission String rationale final int requestCode） {
        if （ActivityCompat.shouldShowRequestPermissionRationale（this permission）） {
            showAlertDialog（getString（R.string.permission_title_rationale） rationale
                    new DialogInterface.onclickListener（） {
                        @Override
                        public void onclick（DialogInterface dialog int which） {
                            ActivityCompat.requestPermissions（baseActivity.this
                                    new String[]{permission} requestCode）;
                        }
                    } getString（R.string.label_ok） null getString（R.string.label_cancel））;
        } else {
            ActivityCompat.requestPermissions（this new String[]{permission} requestCode）;
        }
    }

    /**
     * This method shows dialog with given title & message.
     * Also there is an option to pass onclickListener for positive & negative button.
     *
     * @param title                         - dialog title
     * @param message                       - dialog message
     * @param onPositiveButtonclickListener - listener for positive button
     * @param positiveText                  - positive button text
     * @param onNegativeButtonclickListener - listener for negative button
     * @param negativeText                  - negative button text
     */
    protected void showAlertDialog（@Nullable String title @Nullable String message
                                   @Nullable DialogInterface.onclickListener onPositiveButtonclickListener
                                   @NonNull String positiveText
                                   @Nullable DialogInterface.onclickListener onNegativeButtonclickListener
                                   @NonNull String negativeText） {
        AlertDialog.Builder builder = new AlertDialog.Builder（this）;
        build

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-01-04 10:05  uCrop-master
     文件          44  2018-01-04 10:05  uCrop-master.gitattributes
     目录           0  2018-01-04 10:05  uCrop-master.github
     文件         489  2018-01-04 10:05  uCrop-master.githubISSUE_TEMPLATE.md
     文件         367  2018-01-04 10:05  uCrop-master.gitignore
     文件        7221  2018-01-04 10:05  uCrop-masterREADME.md
     文件         619  2018-01-04 10:05  uCrop-masteruild.gradle
     文件        1369  2018-01-04 10:05  uCrop-mastergradle.properties
     目录           0  2018-01-04 10:05  uCrop-mastergradle
     目录           0  2018-01-04 10:05  uCrop-mastergradlewrapper
     文件       49896  2018-01-04 10:05  uCrop-mastergradlewrappergradle-wrapper.jar
     文件         230  2018-01-04 10:05  uCrop-mastergradlewrappergradle-wrapper.properties
     文件        5080  2018-01-04 10:05  uCrop-mastergradlew
     文件        2314  2018-01-04 10:05  uCrop-mastergradlew.bat
     文件        2748  2018-01-04 10:05  uCrop-mastermavenpush.gradle
     文件     8148837  2018-01-04 10:05  uCrop-masterpreview.gif
     文件     1466051  2018-01-04 10:05  uCrop-masterpreview.png
     目录           0  2018-01-04 10:05  uCrop-mastersample
     文件           7  2018-01-04 10:05  uCrop-mastersample.gitignore
     文件         752  2018-01-04 10:05  uCrop-mastersampleuild.gradle
     文件         665  2018-01-04 10:05  uCrop-mastersampleproguard-rules.pro
     目录           0  2018-01-04 10:05  uCrop-mastersamplesrc
     目录           0  2018-01-04 10:05  uCrop-mastersamplesrcmain
     文件        1701  2018-01-04 10:05  uCrop-mastersamplesrcmainAndroidManifest.xml
     目录           0  2018-01-04 10:05  uCrop-mastersamplesrcmainjava
     目录           0  2018-01-04 10:05  uCrop-mastersamplesrcmainjavacom
     目录           0  2018-01-04 10:05  uCrop-mastersamplesrcmainjavacomyalantis
     目录           0  2018-01-04 10:05  uCrop-mastersamplesrcmainjavacomyalantisucrop
     目录           0  2018-01-04 10:05  uCrop-mastersamplesrcmainjavacomyalantisucropsample
     文件        3265  2018-01-04 10:05  uCrop-mastersamplesrcmainjavacomyalantisucropsampleaseActivity.java
     文件        7303  2018-01-04 10:05  uCrop-mastersamplesrcmainjavacomyalantisucropsampleResultActivity.java
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