Android Open Source - vlcamera Edit Activity Helper

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Back to project page vlcamera.
License

The source code is released under:
Apache License
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Java Source Code

package com.ktmt.vlcamera.activities.helper;
//w  w w . j  av a  2 s.  c  om
import java.io.File;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;

import com.ktmt.vlcamera.activities.EditActivity;
import com.ktmt.vlcamera.common.vlCameraConstant;
import com.ktmt.vlcamera.common.vlCameraBitmapUtils;
import com.ktmt.vlcamera.model.DraggableBitmap;
import com.ktmt.vlcamera.model.DraggableText;

import com.ktmt.vlcamera.R;
import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.RectF;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
import android.widget.EditText;

public class EditActivityHelper {
  private static final String TAG = "EditActivityHelper";
  private static Context mContext;
  
  public EditActivityHelper(Context ctx) {
    mContext = ctx;
  }

  public void displayPreviewImage(Uri uri, EditActivity act) {
    // InputStream is;
    try {
      Boolean needRotate = true;
      Bitmap downSample = vlCameraBitmapUtils.downSampleBitmap(uri, act, needRotate);
      act.getImageView().setImageBitmap(downSample);
      act.setRawBitmap(downSample);
    } catch (Exception e) {
      Log.v(TAG, "some error occur");
      e.printStackTrace();
    }
    Log.i(TAG, "display ok");
  }

  public void popupTextEdit(final popupTextEditListener listener) {
    AlertDialog.Builder addTextDialog = new AlertDialog.Builder(mContext);

    addTextDialog.setTitle(R.string.addtext);
    
    // Set an EditText view to get user input
    final EditText input = new EditText(mContext);
    addTextDialog.setView(input);

    addTextDialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int whichButton) {
        listener.onOkClick(input.getText().toString());
      }
    });

    addTextDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int whichButton) {
        return;
      }
    });

    addTextDialog.show();
  }

  public void addTextToBitmap(String text, int color) {
    EditActivity act = (EditActivity) mContext;
    DraggableText textBmp = new DraggableText(null, text, color);
    act.getImageView().addOverlayBitmap(textBmp, (float) 1.0);
  }

  public interface popupTextEditListener {
    void onOkClick(String tweet);

    void onCancelClick();
  }

  public void flipActiveBitmap() {
    EditActivity act = (EditActivity) mContext;
    act.getImageView().flipActiveBitmap();
    act.getImageView().invalidate();

  }

  public Uri getRawTempFile() throws Exception {
    File tempDir = Environment.getExternalStorageDirectory();
    File tempImg = new File(tempDir.getAbsolutePath() + vlCameraConstant.TEMP_FILE_JPG);
    if (!tempImg.exists())
      throw new Exception("file not exist");

    return Uri.fromFile(tempImg);
  }

  @SuppressLint("NewApi")
  public Bitmap saveCurrentBitmap() {
    EditActivity act = (EditActivity) mContext;

    Bitmap origRawImage = act.getRawBitmap();
    //copy to mutable
    Bitmap rawImage = origRawImage.copy(Bitmap.Config.ARGB_8888, true);
    if (rawImage == null)
      return null;

    Canvas canvas = new Canvas(rawImage);

    // get scale factor
    RectF scaledImg = act.getImageView().getInnerBitmapSize();
    float scale = rawImage.getWidth() / scaledImg.width();

    List<DraggableBitmap> stampList = act.getImageView().getOverlayList();
    if (stampList.size() > 0) {
      Enumeration<DraggableBitmap> e = Collections.enumeration(stampList);
      while (e.hasMoreElements()) {
        DraggableBitmap dBmp = (DraggableBitmap) e.nextElement();

        Matrix finalMtx = new Matrix();

        // calculate margin and move back
        Matrix marginMtx = dBmp.getMarginMatrix();
        float[] moveArr = new float[9];
        marginMtx.getValues(moveArr);
        float x = -(moveArr[2]);
        float y = -(moveArr[5]);
        Matrix moveBackMtx = new Matrix();
        moveBackMtx.postTranslate(x, y);

        // current manipulate matrix (rotate, zoom, move..)
        Matrix manipulateMtx = dBmp.getCurrentMatrix();
        Matrix scaleMtx = new Matrix();

        // scale to original size
        scaleMtx.postScale(scale, scale, 0, 0);

        manipulateMtx = (manipulateMtx == null) ? new Matrix() : manipulateMtx;
        finalMtx.postConcat(manipulateMtx);
        finalMtx.postConcat(moveBackMtx);
        finalMtx.postConcat(scaleMtx);
        canvas.drawBitmap(dBmp.mBitmap, finalMtx, null);
      }
    }

    return rawImage;
  }
}
Java Source Code List
