PreviewImageFromCameraActivity.java

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

import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.provider.MediaStore;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
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.util.file.AttachmentStore;
import com.netease.nim.uikit.common.util.media.BitmapDecoder;
import com.netease.nim.uikit.common.util.storage.StorageType;
import com.netease.nim.uikit.common.util.storage.StorageUtil;
import com.netease.nim.uikit.model.ToolBarOptions;
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 PreviewImageFromCameraActivity extends UI {

	public static final String RESULT_RETAKE = "RESULT_RETAKE";
	public static final String RESULT_SEND = "RESULT_SEND";

	private ImageView previewImageView;

	private File imageFile;

	private Button sendButton;

	private String origImageFilePath;

	private String btnText;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.nim_preview_image_from_camera_activity);

		ToolBarOptions options = new ToolBarOptions();
		setToolBar(R.id.toolbar, options);

		initActionBar();
		getIntentData();
		findViews();
		initSendBtn();
		showPicture();
	}

	private void findViews() {
		sendButton = (Button) findViewById(R.id.buttonSend);
		previewImageView = (ImageView) findViewById(R.id.imageViewPreview);
	}

	private void getIntentData() {
		String imageFilePathString = getIntent().getExtras().getString("ImageFilePath");
		origImageFilePath = getIntent().getExtras().getString("OrigImageFilePath");
		btnText = getIntent().getExtras().getString(Extras.EXTRA_PREVIEW_IMAGE_BTN_TEXT);
		imageFile = new File(imageFilePathString);
	}

	private void initSendBtn() {
		if (!TextUtils.isEmpty(btnText)) {
			sendButton.setText(btnText);
		}
		sendButton.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				ArrayList<String> imageList = new ArrayList<String>();
				ArrayList<String> origImageList = new ArrayList<String>();
				imageList.add(imageFile.getPath());
				origImageList.add(origImageFilePath);

				boolean isOrig = false;
				if (!isOrig) {
					// 拍照不是原图发送的话，原图需要手动删掉
					AttachmentStore.delete(origImageFilePath);
				}

				Intent intent = PreviewImageFromLocalActivity.initPreviewImageIntent(imageList, origImageList, isOrig);
				intent.setClass(PreviewImageFromCameraActivity.this, getIntent().getClass());
				intent.putExtra(RESULT_SEND, true);
				setResult(RESULT_OK, intent);
				PreviewImageFromCameraActivity.this.finish();
			}
		});
	}


	private void initActionBar() {
		TextView toolbarView = findView(R.id.action_bar_right_clickable_textview);
		toolbarView.setText(R.string.recapture);
		toolbarView.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				deleteTempFile();
				Intent intent = new Intent();
				intent.setClass(PreviewImageFromCameraActivity.this, getIntent().getClass());
				intent.putExtra(RESULT_RETAKE, true);
				setResult(RESULT_OK, intent);
				PreviewImageFromCameraActivity.this.finish();
			}
		});
	}

	@Override
	public void onBackPressed() {
		deleteTempFile();

		Intent intent = new Intent();
		intent.setClass(PreviewImageFromCameraActivity.this, getIntent().getClass());
		setResult(RESULT_CANCELED, intent);
		PreviewImageFromCameraActivity.this.finish();
	}

	@Override
	public void onDestroy() {
		Drawable dr = previewImageView.getDrawable();
		previewImageView.setImageBitmap(null);

		if (dr != null) {
			Bitmap bitmap = getBitmap(dr);
			if (bitmap != null) {
				bitmap.recycle();
			}
		}

		super.onDestroy();
	}
	
	public static final Bitmap getBitmap(Drawable dr) {
		if (dr == null) {
			return null;
		}
		
		if (dr instanceof BitmapDrawable) {
			return ((BitmapDrawable) dr).getBitmap();
		}
		
		return null;
	}

	private void showPicture() {
		try {
			Bitmap bitmap = BitmapDecoder.decodeSampledForDisplay(imageFile.getAbsolutePath());

			if (bitmap != null) {
				previewImageView.setImageBitmap(bitmap);
			} else {
				Toast.makeText(this, R.string.image_show_error, Toast.LENGTH_LONG).show();
			}
		} catch (OutOfMemoryError e) {
			Toast.makeText(this, R.string.memory_out, Toast.LENGTH_LONG).show();
		}
	}

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

		new AsyncTask<String, Integer, Boolean>() {

			@Override
			protected void onPreExecute() {
				Toast.makeText(PreviewImageFromCameraActivity.this, R.string.waitfor_image_local, Toast.LENGTH_LONG).show();
			}

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

			@Override
			protected void onPostExecute(Boolean result) {
				Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
				if (Build.VERSION.SDK_INT >= 11) {
					intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
				}
				try {
					PreviewImageFromCameraActivity.this.startActivityForResult(intent, RequestCode.GET_LOCAL_IMAGE);
				} catch (ActivityNotFoundException e) {
					Toast.makeText(PreviewImageFromCameraActivity.this, R.string.gallery_invalid, Toast.LENGTH_LONG).show();
				}
			}
		}.execute();
	}

	private void deleteTempFile() {
		if (imageFile != null) {
			imageFile.delete();
		}

		AttachmentStore.delete(origImageFilePath);
	}
}