Android Open Source - pick-share Custom Matrix Fragment

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License

The source code is released under:

Apache License

Java Source Code

package com.mathilde.customcam.custom_pick;
/*w w  w  .java2s  .  c om*/
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.net.Uri;
import android.os.Bundle;
import android.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.SeekBar;

import com.mathilde.customcam.R;
import com.mathilde.customcam.image.Utils;
import com.mathilde.customcam.widget.StartPointSeekBar;

/**
 * A simple {@link Fragment} subclass.
 * Activities that contain this fragment must implement the
 * {@link CustomMatrixFragment.OnFragmentInteractionListener} interface
 * to handle interaction events.
 * Use the {@link CustomMatrixFragment#newInstance} factory method to
 * create an instance of this fragment.
 *
 */
public class CustomMatrixFragment extends Fragment implements SeekBar.OnSeekBarChangeListener {
    private ImageView mPreviewImageView;
    private SeekBar sb_red, sb_green, sb_blue,sb_alpha;
    private Bitmap afterBitmap;
    private Paint paint;
    private Canvas canvas;
    private Bitmap baseBitmap;
    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;

    private OnFragmentInteractionListener mListener;

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment CustomMatrixFragment.
     */
    // TODO: Rename and change types and number of parameters
    public static CustomMatrixFragment newInstance(String param1, String param2) {
        CustomMatrixFragment fragment = new CustomMatrixFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }
    public CustomMatrixFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View v = inflater.inflate(R.layout.fragment_custom_matrix, container, false);
        final Bundle b = getActivity().getIntent().getExtras();
//        srcBitmap = BitmapFactory.decodeFile(b.get("path").toString());
        mPreviewImageView = (ImageView) v.findViewById(R.id.image_custom);
//        mPreviewImageView.setImageURI((Uri) b.get("uri"));

        sb_red = (SeekBar) v.findViewById(R.id.seekbar_red);
        sb_red.setProgress(100);
        sb_green = (SeekBar) v.findViewById(R.id.seekbar_green);
        sb_green.setProgress(100);
        sb_blue = (SeekBar) v.findViewById(R.id.seekbar_blue);
        sb_blue.setProgress(100);
        sb_alpha = (SeekBar) v.findViewById(R.id.seekbar_alpha);
        sb_alpha.setProgress(100);
        sb_red.setOnSeekBarChangeListener(this);
        sb_green.setOnSeekBarChangeListener(this);
        sb_blue.setOnSeekBarChangeListener(this);
        sb_alpha.setOnSeekBarChangeListener(this);



        // Get a picture from a resource file
        baseBitmap = BitmapFactory.decodeFile(b.get("path").toString());
        mPreviewImageView.setImageBitmap(baseBitmap);
        // Empty picture gets a and baseBitmap the same size editable
        afterBitmap = Bitmap.createBitmap(baseBitmap.getWidth(),
                baseBitmap.getHeight(), baseBitmap.getConfig());
        canvas = new Canvas(afterBitmap);
        paint = new Paint();
        return v;
    }

    // TODO: Rename method, update argument and hook method into UI event
    public void onButtonPressed(Uri uri) {
        if (mListener != null) {
            mListener.onFragmentInteraction(uri);
        }
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            mListener = (OnFragmentInteractionListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement OnFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        float progressR = sb_red.getProgress()/128f;
        float progressG = sb_green.getProgress()/128f;
        float progressB = sb_blue.getProgress()/128f;
        float progressA=sb_alpha.getProgress()/128f;
        Log.i("main", "R: G: B=" + sb_red.getProgress() + ": " + progressG + ": " + progressB);
        // According to the definition of the RGBA matrix SeekBar
        float[] src = new float[]{
                progressR, 0, 0, 0, 0,
                0, progressG, 0, 0, 0,
                0, 0, progressB, 0, 0,
                0, 0, 0, progressA, 0};
        // The definition of ColorMatrix, and specify the RGBA matrix
        ColorMatrix colorMatrix = new ColorMatrix();
        colorMatrix.set(src);
        // Set the Paint color
        paint.setColorFilter(new ColorMatrixColorFilter(src));
        // By specifying the RGBA matrix Paint of the original picture of the blank picture
        canvas.drawBitmap(baseBitmap, new Matrix(), paint);
        mPreviewImageView.setImageBitmap(afterBitmap);
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {

    }

    /**
     * This interface must be implemented by activities that contain this
     * fragment to allow an interaction in this fragment to be communicated
     * to the activity and potentially other fragments contained in that
     * activity.
     * <p>
     * See the Android Training lesson <a href=
     * "http://developer.android.com/training/basics/fragments/communicating.html"
     * >Communicating with Other Fragments</a> for more information.
     */
    public interface OnFragmentInteractionListener {
        // TODO: Update argument type and name
        public void onFragmentInteraction(Uri uri);
    }

}

Java Source Code List

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