PreviewImageFromLocalActivity.java

package com.netease.nim.uikit.common.media.picker.activity;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.netease.nim.uikit.R;
import com.netease.nim.uikit.common.activity.UI;
import com.netease.nim.uikit.common.media.picker.adapter.ImagePagerAdapterInImageSwitch;
import com.netease.nim.uikit.common.ui.dialog.EasyAlertDialog;
import com.netease.nim.uikit.common.ui.imageview.BaseZoomableImageView;
import com.netease.nim.uikit.common.util.file.AttachmentStore;
import com.netease.nim.uikit.common.util.file.FileUtil;
import com.netease.nim.uikit.common.util.media.BitmapDecoder;
import com.netease.nim.uikit.common.util.media.ImageUtil;
import com.netease.nim.uikit.common.util.storage.StorageType;
import com.netease.nim.uikit.common.util.storage.StorageUtil;
import com.netease.nim.uikit.session.constant.Extras;
import com.netease.nim.uikit.session.constant.RequestCode;

import java.io.File;
import java.util.ArrayList;

public class PreviewImageFromLocalActivity extends UI {
    
	private boolean needShowSendOriginal = false;
	
	private ImageButton originalImage;
	
	private boolean isSendOriginalImage;

	private TextView originalImageSizeTip;
	
	private File imageFile;

	private ArrayList<String> selectImageList;

	private ArrayList<String> origImageList;

	protected ViewPager imageViewPager;

	private ImagePagerAdapterInImageSwitch imageViewPagerAdapter;

	protected BaseZoomableImageView currentImageView;

	protected int currentPostion = -1;

	private int tempIndex = -1;

	private View sendButton;

    public static Intent initPreviewImageIntent(
            ArrayList<String> thumbnailImageList,
            ArrayList<String> orignialImageList,
            boolean isOrignial
            ) {        
        Intent intent = new Intent();
        intent.putStringArrayListExtra(Extras.EXTRA_SCALED_IMAGE_LIST, thumbnailImageList);
        intent.putStringArrayListExtra(Extras.EXTRA_ORIG_IMAGE_LIST, orignialImageList);
        intent.putExtra(Extras.EXTRA_IS_ORIGINAL, isOrignial);
        return intent;
    }

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.nim_preview_image_from_local_activity);
				
		originalImageSizeTip = (TextView) findViewById(R.id.picker_image_preview_orignal_image_tip);       
        originalImage = (ImageButton) findViewById(R.id.picker_image_preview_orignal_image);
		originalImage.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				isSendOriginalImage = !isSendOriginalImage;
				updateOriImageSizeTip(isSendOriginalImage);
			}
		});
		
		needShowSendOriginal = getIntent().getBooleanExtra(Extras.EXTRA_NEED_SHOW_SEND_ORIGINAL, false);
		if (needShowSendOriginal) {
			originalImage.setVisibility(View.VISIBLE);
			originalImageSizeTip.setVisibility(View.VISIBLE);		
		} else {
			originalImage.setVisibility(View.INVISIBLE);
			originalImageSizeTip.setVisibility(View.INVISIBLE);				
		}
        
		sendButton = findViewById(R.id.buttonSend);
		sendButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				if (isSendOriginalImage) {
					sendOrigImage();
				} else {
					sendSelectedImage(false);					
				}				
			}
		});
		
		initViewPager();		
	}
    
	private void restoreList() {
		if (tempIndex != -1) {
			imageViewPager.setAdapter(imageViewPagerAdapter);
			setTitleIndex(tempIndex);
			imageViewPager.setCurrentItem(tempIndex);
			tempIndex = -1;
		}
	}

	private void setTitleIndex(int index) {
		if (selectImageList.size() <= 0) {
			setTitle("");
		}
		else {
			index++;
			setTitle(index + "/" + selectImageList.size());
		}
	}

	private void sendSelectedImage(boolean isOrig) {
	    Intent intent = initPreviewImageIntent(selectImageList, origImageList, isOrig);
	    intent.setClass(PreviewImageFromLocalActivity.this, getIntent().getClass());
	    setResult(RESULT_OK, intent);
	    PreviewImageFromLocalActivity.this.finish();
	}

	@SuppressLint("NewApi")
	private void sendOrigImage() {
		final UI activity = PreviewImageFromLocalActivity.this;
		final EasyAlertDialog allAlertDialog = new EasyAlertDialog(activity);
		allAlertDialog.setTitle(getString(R.string.picker_image_preview_original));
		
		long fileSize = 0;
		for (String filepath : origImageList) {
			fileSize += AttachmentStore.getFileLength(filepath);
		}

		if (origImageList.size() == 1) {
			allAlertDialog.setMessage(getString(R.string.image_compressed_size, FileUtil.formatFileSize(fileSize))
					+ getString(R.string.is_send_image));
		} else {
			allAlertDialog.setMessage(getString(R.string.multi_image_compressed_size,
					FileUtil.formatFileSize(fileSize))
					+ getString(R.string.is_send_multi_image));
		}

		allAlertDialog.addPositiveButton(getString(R.string.ok), EasyAlertDialog.NO_TEXT_COLOR, EasyAlertDialog.NO_TEXT_SIZE,
				new OnClickListener() {
					@Override
					public void onClick(View view) {
						sendSelectedImage(true);
					}
				});
		allAlertDialog.addNegativeButton(getString(R.string.cancel), EasyAlertDialog.NO_TEXT_COLOR,
				EasyAlertDialog.NO_TEXT_SIZE, new OnClickListener() {
					@Override
					public void onClick(View view) {
						allAlertDialog.dismiss();
					}
				});
		if (!activity.isDestroyedCompatible()) {
			allAlertDialog.show();
		}
	}
	
	private void updateOriImageSizeTip(boolean isOrig){
		if(origImageList == null)
			return;
		if(isOrig){
			long totalSize = 0;
			
			for (String filepath : origImageList) {
				totalSize += AttachmentStore.getFileLength(filepath);
			}
			originalImageSizeTip.setText(String.format(this.getResources().getString(
					R.string.picker_image_preview_original_select), FileUtil.formatFileSize(totalSize)));
			originalImage.setImageResource(R.drawable.nim_picker_orignal_checked);
		}else{
			originalImageSizeTip.setText(R.string.picker_image_preview_original);
			originalImage.setImageResource(R.drawable.nim_picker_orignal_normal);
		}
	}

    /**
	 * 初始化图片查看
	 */
	private void initViewPager() {
		imageViewPager = (ViewPager) findViewById(R.id.viewPagerImage);
		imageViewPager.setOnPageChangeListener(new OnPageChangeListener() {
			@Override
			public void onPageScrollStateChanged(int arg0) {
			}

			@Override
			public void onPageScrolled(int arg0, float arg1, int arg2) {
			}

			@Override
			public void onPageSelected(int arg0) {
				setTitleIndex(arg0);
			}
		});
		imageViewPager.setOffscreenPageLimit(2);

		String imageFilePath = getIntent().getExtras().getString("ImageFilePath");
		String origImageFilePath = getIntent().getExtras().getString("OrigImageFilePath");

		imageFile = new File(imageFilePath);

		selectImageList = new ArrayList<String>();
		selectImageList.add(imageFilePath);

		origImageList = new ArrayList<String>();
		origImageList.add(origImageFilePath);

		imageViewPagerAdapter = new ImagePagerAdapterInImageSwitch(this, selectImageList, getLayoutInflater(),
				imageViewPager.getLayoutParams().width, imageViewPager.getLayoutParams().height, this);
		imageViewPager.setAdapter(imageViewPagerAdapter);
	}

	@Override
	public void onBackPressed() {
		deleteTempFiles();
		
		Intent intent = new Intent();
		intent.setClass(PreviewImageFromLocalActivity.this, getIntent().getClass());
		setResult(RESULT_CANCELED, intent);
		PreviewImageFromLocalActivity.this.finish();
	}

	@Override
	public void onResume() {
		// restore the data source
		restoreList();

		super.onResume();
	}

	@Override
	public void onPause() {
		// recycleBitmap(previewImageView);

		// save the data source and recycle all bitmaps
		imageViewPager.setAdapter(null);
		tempIndex = currentPostion;
		currentPostion = -1;

		super.onPause();
	}

	/**
	 * 获取本地图片
	 */
	protected void choosePictureFromLocal() {
		if (!StorageUtil.hasEnoughSpaceForWrite(PreviewImageFromLocalActivity.this, StorageType.TYPE_IMAGE, true)) {
			return;
		}

		new AsyncTask<String, Integer, Boolean>() {
			@Override
			protected void onPreExecute() {
				Toast.makeText(PreviewImageFromLocalActivity.this, R.string.waitfor_image_local, Toast.LENGTH_LONG).show();
			}

			@Override
			protected Boolean doInBackground(String... params) {
				return true;
			}

			@Override
			protected void onPostExecute(Boolean result) {
				int from = PickImageActivity.FROM_LOCAL;
				Activity thiz = PreviewImageFromLocalActivity.this;
				PickImageActivity.start(thiz, RequestCode.GET_LOCAL_IMAGE, from, "");
			}
		}.execute();
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		if (resultCode != RESULT_CANCELED) {
			if (requestCode == RequestCode.GET_LOCAL_IMAGE) {
				onGetLocalPictureResult(requestCode, resultCode, data);
			}
		} else {
			if (selectImageList.size() == 0) {
				sendButton.setEnabled(false);
			}
		}
	}

	public void onGetLocalPictureResult(int requestCode, int resultCode, final Intent data) {
		if (data == null) {
			return;
		}
		final String photoPath = data.getStringExtra(Extras.EXTRA_FILE_PATH);
		if (TextUtils.isEmpty(photoPath)) {
			return;
		}
		
		imageFile = new File(photoPath);
		String mimeType = FileUtil.getExtensionName(photoPath);
		imageFile = ImageUtil.getScaledImageFileWithMD5(imageFile, mimeType);
		if (imageFile == null) {
			Toast.makeText(this, R.string.picker_image_error, Toast.LENGTH_LONG).show();
			return;
		} else {
			ImageUtil.makeThumbnail(PreviewImageFromLocalActivity.this,
                    imageFile);
		}
		
		origImageList.add(photoPath);
		selectImageList.add(imageFile.getAbsolutePath());
		imageViewPagerAdapter.notifyDataSetChanged();

		final Handler handler = new Handler();
		handler.postDelayed(new Runnable() {
			@Override
			public void run() {
				imageViewPager.setCurrentItem(selectImageList.size() - 1);
			}
		}, 100);
        //有可用的图片
        if(selectImageList.size() >= 1){
            sendButton.setEnabled(true);
        }
	}

	public void updateCurrentImageView(final int position) {
		if (selectImageList == null 
				|| (position > 0
				&& position >= selectImageList.size()))
			return;

		if (currentPostion == position) {
			return;
		} else {
			currentPostion = position;
		}
		setTitleIndex(position);

		// LinearLayout currentLayout = (LinearLayout)
		// imageViewPager.getChildAt(position);
		LinearLayout currentLayout = (LinearLayout) imageViewPager.findViewWithTag(position);

		if (currentLayout == null) {
			Handler mHandler = new Handler();
			mHandler.postDelayed(new Runnable() {
				@Override
				public void run() {
					updateCurrentImageView(position);
				}
			}, 300);
			return;
		}
		currentImageView = (BaseZoomableImageView) currentLayout.findViewById(R.id.imageView);
		currentImageView.setViewPager(imageViewPager);

		setImageView(selectImageList.get(position));
	}

	public void setImageView(String imageFilePath) {
		if (imageFilePath == null) {
			return;
		}

		Bitmap bitmap = BitmapDecoder.decodeSampledForDisplay(imageFilePath);
		if (bitmap == null) {
			currentImageView.setImageBitmap(ImageUtil.getDefaultBitmapWhenGetFail());
			Toast.makeText(this, R.string.picker_image_error, Toast.LENGTH_LONG).show();
		} else {
			currentImageView.setImageBitmap(bitmap);
		}
	}
	
	private void deleteTempFiles() {
		for (String file : selectImageList) {
			new File(file).delete();
		}
	}
}