Android Open Source - droidling Graph Card

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License

The source code is released under:

Copyright (c) 2012 Keith Trnka Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Softwa...

Java Source Code

package com.github.ktrnka.droidling;
// w  ww.  j a  v  a 2 s . c om
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.ref.WeakReference;

import org.achartengine.GraphicalView;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap.CompressFormat;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.util.Log;
import android.view.Display;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.TextView;

import com.fima.cardsui.objects.RecyclableCard;

/**
 * Plain card that has a title and description.
 */
public class GraphCard extends RecyclableCard {
    private GraphicalView graphView;
    private View.OnClickListener shareListener;

    /**
     * Trying to avoid circular reference between the Activity to the share
     * button listener
     */
    private WeakReference<Context> weakContext;

    public GraphCard(String title, GraphicalView graphView, String applicationName,
            Context shareContext) {
        super(title, null, 0);

        this.graphView = graphView;

        weakContext = new WeakReference<Context>(shareContext);
        shareListener = new ShareListener("Shared histogram from " + applicationName);
    }

    @Override
    protected int getCardLayoutId() {
        return R.layout.card_graph;
    }

    @Override
    protected void applyTo(View convertView) {
        ((TextView) convertView.findViewById(R.id.title)).setText(title);

        // setup the graph
        ViewGroup container = (ViewGroup) convertView.findViewById(R.id.graphGroup);

        // TODO: This method for getting height is deprecated
        // Maybe I should set a target aspect ratio for the graph and trigger
        // from the width.
        WindowManager wm = (WindowManager) convertView.getContext().getSystemService(
                Context.WINDOW_SERVICE);
        Display display = wm.getDefaultDisplay();
        int screenHeight = display.getHeight();

        container.removeAllViews();
        ViewGroup oldParent = (ViewGroup) graphView.getParent();
        if (oldParent != null)
            oldParent.removeView(graphView);

        container.addView(graphView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,
                screenHeight / 3));

        if (shareListener != null) {
            ImageView shareButton = (ImageView) convertView.findViewById(R.id.share);
            shareButton.setOnClickListener(shareListener);
        }
    }

    private class ShareListener implements View.OnClickListener {
        private String subject;
        private static final String chooserText = "Share with...";
        private static final String FILENAME = "sms_ling.png";

        ShareListener(String subject) {
            this.subject = subject;
        }

        @TargetApi(Build.VERSION_CODES.FROYO)
        public void onClick(View view) {
            if (weakContext == null)
                return;

            Context context = weakContext.get();
            if (context == null)
                return;

            File file;
            if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) {
                file = new File(context.getExternalFilesDir(null), FILENAME);
            }
            else {
                String packageName = context.getPackageName();
                File externalRoot = Environment.getExternalStorageDirectory();
                File externalDir = new File(externalRoot.getAbsolutePath() + "/Android/data/"
                        + packageName + "/files");

                if (!externalDir.exists()) {
                    if (!externalDir.mkdirs()) {
                        Log.e("GraphCard", "Failed to create storage directory for " + externalDir);
                    }
                }

                file = new File(externalDir, FILENAME);
            }

            try {
                OutputStream out = new BufferedOutputStream(new FileOutputStream(file));
                graphView.toBitmap().compress(CompressFormat.PNG, 100, out);
                out.close();

                Intent intent = new Intent(android.content.Intent.ACTION_SEND);
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                intent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + file.getAbsolutePath()));
                intent.setType("image/png");

                intent.putExtra(Intent.EXTRA_SUBJECT, subject);

                context.startActivity(Intent.createChooser(intent, chooserText));
            } catch (IOException e) {
                Log.e("GraphCard", "Failed to share: " + e.toString());
            }
        }
    }
}

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