ini adalah Bagian dari Project Crop Image

MainActivity.java

package com.example.putuguna.croppingimage;

import android.Manifest;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;

import com.theartofdev.edmodo.cropper.CropImage;
import com.theartofdev.edmodo.cropper.CropImageView;

public class MainActivity extends AppCompatActivity {

    private Uri mCropImageUri;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



    }

    /**
     * start pick image activity with chooser
     * method ini tercipta dari onCLick diLayout
     */
    public void onSelectImageClick(View view) {
        CropImage.startPickImageActivity(this);
    }

    @TargetApi(Build.VERSION_CODES.M)
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if(requestCode == CropImage.PICK_IMAGE_CHOOSER_REQUEST_CODE && resultCode== Activity.RESULT_OK){
            Uri imageUri = CropImage.getPickImageResultUri(this, data);

            // For API >= 23 we need to check specifically that we have permissions to read external storage.
            boolean requirePermission = false;
            if(CropImage.isReadExternalStoragePermissionsRequired(this,imageUri)){
                requirePermission = true;
                mCropImageUri = imageUri;
                requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},0);
            }else{
                startCropImageActivity(imageUri);
            }
        }
        if(requestCode==CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE){
            CropImage.ActivityResult result = CropImage.getActivityResult(data);
            if(resultCode==RESULT_OK){
                ImageView aa = (ImageView) findViewById(R.id.quick_start_cropped_image);
                aa.setImageURI(result.getUri());
            }else if(resultCode==CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE){
                Toast.makeText(this, "Cropping failed: " + result.getError(), Toast.LENGTH_LONG).show();
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        if(mCropImageUri!=null && grantResults.length>0 && grantResults[0]== PackageManager.PERMISSION_GRANTED){
            // required permissions granted, start crop image activity
            startCropImageActivity(mCropImageUri);
        }else{
            Toast.makeText(this, "Cancelling, required permissions are not granted", Toast.LENGTH_LONG).show();
        }
    }

    /**
     * Start crop image dengan image yang telah diambil.
     */
    private void startCropImageActivity(Uri imageUri) {
        CropImage.activity(imageUri)
                .setGuidelines(CropImageView.Guidelines.ON)
                .start(this);
    }
}