Android微信图片浏览框架设计

一、业务场景

1、聊天界面发送图片==>多选点选+有右上角”发送”+图片预览==>图片预览支持右上角”发送”逻辑
2、发表动态==>多选点选+右上角”完成” + 图片预览==>图片预览支持右上角”完成”逻辑
3、个人资料更改头像==>单选点选 + 图片预览截图==>图片预览截图支持右上角”使用”逻辑

二、Intent参数设计; (Intent传参原则:尽量不要使用自定义类型专递参数)

1、最基本的参数传递(可选图片最大数目、右上角的标题、单选模式还是多选模式、返回结果的参数)

  
  public static final String EXTRA_SELECt_COUNT = "max_select_count";

  
  public static final String EXTRA_SUBMIT_TITLE = "extra_submit_title";

  
  public static final String EXTRA_SELECT_MODE = "select_count_mode";

  
  public static final String EXTRA_RESULT = "select_result";

 2、扩展部分参数传递(图片选择界面的第一个Item是否显示拍照功能、预览的activity是否支持”勾选取消结束”勾选按钮)

 
  public static final String EXTRA_SHOW_CAMERA = "show_camera";

  
  public static final String EXTRA_JUMPTOCHECKPICS = "is_jumpto_checkpics";

3、在”发表动态选择”已经选了5张图片,再去选择图片–图片浏览器需要将已选的图片勾选状态设置为勾选

 
  public static final String EXTRA_DEFAULT_SELECTED_LIST = "default_list";

4、截图功能(单选模式下,如果启动截图模式,那么选择后跳转截图界面)

  
  public static final String RESIZEBIT = "RESIZEBIT";
  
  public static final String RESULT = "resultPath";
  
  public static final String MODE_SCALE_BOOLEAN = "MODE_SCALE_BOOLEAN";
  
  public static final String SCALEW = "scaleW";
  
  public static final String SCALEH = "SCALEH";
  
  public static final String LIMITW = "limitWidth";
  
  public static final String LIMITH = "limitHight";
  
  public static final String MODE_SCALE_PATH = "MODE_SCALE_PATH";

三、理清楚需求之后进行设计

此处省略;分享的代码实现的功能,尚未设计优化代码可读性较差
代码项目github地址IMAlbum

四、代码使用方法

 public static void jumpToSelectPics(Activity mContext, boolean isShowCamera, int selectMaxCount, int selectMode,
      String submitBtnStr, boolean isJumpToCheckPics, ArrayList hasSelectList) {
    Intent intent = new Intent(mContext, MultiImageSelectorActivity.class);

    // whether show camera
    intent.putExtra(MultiImageSelectorActivity.EXTRA_SHOW_CAMERA, isShowCamera);

    // String of submit button
    intent.putExtra(MultiImageSelectorActivity.EXTRA_SUBMIT_TITLE, submitBtnStr);

    // String of submit button
    intent.putExtra(MultiImageSelectorFragment.EXTRA_JUMPTOCHECKPICS, isJumpToCheckPics);

    // max select image amount
    intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_COUNT, selectMaxCount);

    // select mode (MultiImageSelectorActivity.MODE_SINGLE OR MultiImageSelectorActivity.MODE_MULTI)
    intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_MODE, selectMode);

    // EXTRA_DEFAULT_SELECTED_LIST

    if (hasSelectList != null) {
      intent.putStringArrayListExtra(MultiImageSelectorActivity.EXTRA_DEFAULT_SELECTED_LIST, hasSelectList);
    }
    //
    mContext.startActivityForResult(intent, REQUEST_IMAGE);
  }


  
  public static void jumpToSelecAndCropImg(Activity mContext, String picResultPath, int scaleW, int scaleH,
      int limtWidth, int limitHight, boolean isScaleImg) {
    Intent intent = new Intent(mContext, MultiImageSelectorActivity.class);

    // whether show camera
    intent.putExtra(MultiImageSelectorActivity.EXTRA_SHOW_CAMERA, false);

    // max select image amount
    intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_COUNT, 1);
    // select mode (MultiImageSelectorActivity.MODE_SINGLE OR MultiImageSelectorActivity.MODE_MULTI)
    intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_MODE, MultiImageSelectorActivity.MODE_SINGLE);
    // intent.putExtra(MultiImageSelectorActivity.EXTRA_DEFAULT_CROP_CAMERA, isScaleImg);

    intent.putExtra(CropImageAct.RESIZEBIT, isScaleImg);
    intent.putExtra(CropImageAct.RESULT, picResultPath);
    intent.putExtra(CropImageAct.SCALEW, scaleW);
    intent.putExtra(CropImageAct.SCALEH, scaleH);
    intent.putExtra(CropImageAct.LIMITW, limtWidth);
    intent.putExtra(CropImageAct.LIMITH, limitHight);

    mContext.startActivityForResult(intent, REQUEST_CROPIMAGE);
  }

  
  public static void jumpToSelectNoCropImg(Activity mContext) {
    jumpToSelectPics(mContext, false, 2, MultiImageSelectorActivity.MODE_SINGLE);
  }

 五、baseselectactivity类

  
public abstract class baseSelectPicAct extends Activity {

  private final int CROPCAMARA_TAKEPHOTO = 1003;
  private final int CROPCAMARA_SELECTFROMALBUM = 1004;

  
  private final int ACTIVITY_RESULT_CROPCAMARA_WITH_DATA = 1;
  private File mPicFile; // 选择图片路径
  private String picPath;


  @Override
  public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
  }


  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode != RESULT_OK) { return; }
    switch (requestCode) {
      case IntentUtils.REQUEST_IMAGE: // 选择照片
 
 if (null != data) {
   ArrayList resultList = data
.getStringArrayListExtra(MultiImageSelectorActivity.EXTRA_RESULT);
   hasSelectPicsNoCrop(resultList);
   
 }
 break;

      case ACTIVITY_RESULT_CROPCAMARA_WITH_data: // 拍照
 
 if (mPicFile == null && !TextUtils.isEmpty(picPath)) mPicFile = new File(picPath);
 if (null != mPicFile && mPicFile.exists()) {
   hasTakePhotoPic(mPicFile);
 }
 break;
      case IntentUtils.REQUEST_CROPIMAGE:
 if (null == data) { return; }
 if (TextUtils.isEmpty(mPicFile.toString()) || !mPicFile.exists()) {
   Toast.makeText(this, "没有选择图片", Toast.LENGTH_LONG).show();
   return;
 }
 String mPicNativePath = Environment.getExternalStorageDirectory().getAbsolutePath() +"/image" + mPicFile.getName();
 try {
   FilecacheTool.copyFile(mPicFile.getAbsolutePath(), mPicNativePath);
 } catch (Exception e) {
   e.printStackTrace();
 }

 hasPicsCroped(mPicNativePath);
 break;
    }
  };

  protected void selectPhoto() {
    ImageTool.jumpToSelectNoCropImg(this);
  }

  protected void selectPhotoAndCrop() {
    mPicFile = ImageTools.initTempFile();
    
    ImageTool.jumpToSelecAndCropImg(this, mPicFile.toString(), 300, 300, 600, 600, true);
  }

  
  protected void takePhoto() {
    if (!ImageTools.isSDCardExist()) {
      Toast.makeText(this, "没有内存卡", Toast.LENGTH_LONG).show();
      return;
    }
    mPicFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/"
 + System.currentTimeMillis() + ".jpg");
    picPath = mPicFile.getAbsolutePath();
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mPicFile));
    startActivityForResult(intent, ACTIVITY_RESULT_CROPCAMARA_WITH_DATA);
  }

  protected abstract void hasSelectPicsNoCrop(ArrayList resultList);

  protected abstract void hasTakePhotoPic(File mPicFile);

  protected abstract void hasPicsCroped(String mPicNativePath);

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    outState.putString("picPathCache", picPath);
    super.onSaveInstanceState(outState);
  }

  @Override
  protected void onRestoreInstanceState(Bundle savedInstanceState) {
    picPath = savedInstanceState.getString("picPathCache");
    super.onRestoreInstanceState(savedInstanceState);
  }
}

 六、图库选择simple

public class AlbumTestAct extends baseSelectPicAct implements onClickListener {

  private ImageView iv_showresult;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.act_albumtest);
    findViewById(R.id.tv_takephoto).setonClickListener(this);
    findViewById(R.id.tv_selectphoto).setonClickListener(this);
    findViewById(R.id.tv_selectandcrop).setonClickListener(this);
    iv_showresult = (ImageView) findViewById(R.id.iv_showresult);

  }

  @Override
  public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()) {
    case R.id.tv_takephoto:
      takePhoto();
      break;
    case R.id.tv_selectphoto:
      selectPhoto();
      break;
    case R.id.tv_selectandcrop:
      selectPhotoAndCrop();
      break;

    default:
      break;
    }
  }

  @Override
  protected void hasSelectPicsNoCrop(ArrayList resultList) {
    // TODO Auto-generated method stub
    if (null != resultList) {
      if(resultList.size() > 0)
      {
 ImageLoader.getInstance().displayImage(Scheme.FILE.wrap(resultList.get(0)), iv_showresult);
      }
    }
  }

  @Override
  protected void hasTakePhotoPic(File mPicFile) {
    // TODO Auto-generated method stub
    if(null != mPicFile && mPicFile.exists())
    {
    ImageLoader.getInstance().displayImage(Scheme.FILE.wrap(mPicFile.getPath()), iv_showresult);
    }
  }

  @Override
  protected void hasPicsCroped(String mPicNativePath) {
    // TODO Auto-generated method stub
    if(null != mPicNativePath && new File(mPicNativePath).exists())
    {
    ImageLoader.getInstance().displayImage(Scheme.FILE.wrap(mPicNativePath), iv_showresult);
    }
  }

}

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