BaseActivity.java

package com.hbwhale.seedmoney.tabs;

import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
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;
import android.widget.Toast;

import com.hbwhale.seedmoney.R;
import com.hbwhale.seedmoney.utils.AndroidUtils;
import com.yalantis.ucrop.UCrop;

import java.io.File;

/**
 * source from : https://github.com/Yalantis/uCrop/blob/master/sample/src/main/java/com/yalantis/ucrop/sample/BaseActivity.java
 * modified by namh
 */
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);
        builder.setTitle(title);
        builder.setMessage(message);
        builder.setPositiveButton(positiveText, onPositiveButtonClickListener);
        builder.setNegativeButton(negativeText, onNegativeButtonClickListener);
        mAlertDialog = builder.show();
    }





    //----------------------------------------------------> for cropper
    protected final int REQUEST_SELECT_PICTURE = 0x01;
    private static final String SAMPLE_CROPPED_IMAGE_NAME = "SampleCropImage.jpeg";
    protected Uri mDestinationUri;



    private boolean needRequestPermission(Context context){
        return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN // Permission was added in API Level 16
                &&
                ActivityCompat.checkSelfPermission(
                        context,
                        Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED);

    }


    protected void pickFromGallery() {
        if(needRequestPermission(this)){
            requestPermission(Manifest.permission.READ_EXTERNAL_STORAGE,
                    getString(R.string.permission_read_storage_rationale),
                    REQUEST_STORAGE_READ_ACCESS_PERMISSION);
        } else {
            Intent intent = new Intent();
            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            intent.addCategory(Intent.CATEGORY_OPENABLE);
            startActivityForResult(
                    Intent.createChooser(intent, getString(R.string.label_select_picture)),
                    REQUEST_SELECT_PICTURE);
        }
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (resultCode == RESULT_OK) {
            ////////////////////
            // <-- from gallery
            if (requestCode == REQUEST_SELECT_PICTURE) {
                final Uri selectedUri = data.getData();
                if (selectedUri != null) {
                    startCropActivity(data.getData());
                } else {
                    Toast.makeText(this, R.string.toast_cannot_retrieve_selected_image, Toast.LENGTH_SHORT).show();
                }
            }
            ////////////////////
            // <-- from cropper
            else if (requestCode == UCrop.REQUEST_CROP) {
                handleCropResult(data);
            }
        }
        if (resultCode == UCrop.RESULT_ERROR) {
            handleCropError(data);
        }
    }

    private void startCropActivity(@NonNull Uri uri) {
        if(mDestinationUri == null){
            mDestinationUri = Uri.fromFile(new File(getCacheDir(), SAMPLE_CROPPED_IMAGE_NAME));
        }
        UCrop.of(uri, mDestinationUri).start(getActivity());

    }

    protected Activity getActivity(){
        return this;
    }

    protected void handleCropResult(@NonNull Intent result) {
        // final Uri resultUri = UCrop.getOutput(result);
        // if (resultUri != null) {
        //     ResultActivity.startWithUri(SampleActivity.this, resultUri);
        // } else {
        //     Toast.makeText(SampleActivity.this, R.string.toast_cannot_retrieve_cropped_image, Toast.LENGTH_SHORT).show();
        // }
    }

    @SuppressWarnings("ThrowableResultOfMethodCallIgnored")
    protected void handleCropError(@NonNull Intent result) {
        // final Throwable cropError = UCrop.getError(result);
        // if (cropError != null) {
        //     Log.e(TAG, "handleCropError: ", cropError);
        //     Toast.makeText(SampleActivity.this, cropError.getMessage(), Toast.LENGTH_LONG).show();
        // } else {
        //     Toast.makeText(SampleActivity.this, R.string.toast_unexpected_error, Toast.LENGTH_SHORT).show();
        // }
    }
    


}