jinqian

Android Assets

Basic conceptions

Apply the main stream ratio 16:9, here are the screen sizes:

• mdpi: ~160dpi, 640 x 360 px
• hdpi: ~240dpi, 960 x 540 px
• xhdpi: ~320dpi, 1280 x 720 px
• xxhdpi: ~higher, 1920 x 1080 px

jinqian

public void DisplayImage(final Namespace ns, String key, final ImageView imageView) {
	Bitmap bitmap = getBitmap(ns, key);
		
	if (bitmap != null) {
		Log.d(TAG, "BITMAP ALREADY DOWNLOWDED");
		imageView.setImageBitmap(bitmap);
	}
	else {
		imageView.setImageResource(R.drawable.stub);
		ns.load(key, new Namespace.LoadListener() {

jinqian

  /**
	 * Common view components such as ListView and GridView recycle child views
	 * as users scrolls. If each child view triggers an load task, there is no
	 * guarantee when it completes, the associated view has not already been
	 * recycled for use in another child view, either for the order in which
	 * asynchronous tasks are started is the order that they complete.
	 * 
	 * This custom Drawable that will be attached to the imageView while the
	 * work is in progress. Contains a reference to the actual loading image,
	 * a.k.a the uid of the image being loading.

jinqian

  public void BackgroundThreadExecutionMethod() {
    synchronized (mPauseWorkLock) {
        while (mPauseWork) {
            try {
            	mPauseWorkLock.wait();
            } catch (InterruptedException e) {}
        }
    }
  }

jinqian

long startTime = System.currentTimeMillis();
long endTime = System.currentTimeMillis();
Log.d("Benchmark", "Json decode execution time: " + (endTime - startTime) + "ms");

jinqian

fullpath = "/Users/bonbon/image/cover.jpg"
dirpath, file = os.path.split(fullpath)
name = os.path.splitext(file)[0]

print file # "cover.jpg"
print name # "cover"

jinqian

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/item_cell"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
  <!-- xml layout -->
</LinearLayout>

jinqian

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;

public class SquaredImageView extends ImageView {

  public SquaredImageView(Context context) {
    super(context);

  }

jinqian

// MIXPANEL send a open scanner event
    JSONObject properties = new JSONObject();
    try {
      properties.put("merchant", c.getMerchant());
      properties.put("catalog name", c.getName());
      properties.put("hour of the day", hourOfTheDay());
    } catch (JSONException e) {
      e.printStackTrace();
    }
    mMixpanel.track("open a scanner", properties);

jinqian

private void preloadImages() {
    final Namespace images = mWinch.getNamespace("images");
    Iterator it1 = new Iterator() {
      public int next() {
        try {
          images.get(key);
        } catch (WinchError e) {
          if (e.getErrorCode() == WinchError.Code.EWEAKVAL) {
            try {
              mWinch.load("images", key);