JakeWharton

package com.squareup.widgets;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ViewAnimator;

/** ViewAnimator helper which allows setting the selected child by ID rather than index. */
public class SquareViewAnimator extends ViewAnimator {
  public SquareViewAnimator(Context context) {

JakeWharton

// Copyright 2012 Square, Inc.
package com.squareup.widgets;

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

/** Maintains an aspect ratio based on either width or height. Disabled by default. */
public class AspectRatioImageView extends ImageView {

JakeWharton

public class CheckableFrameLayout extends FrameLayout implements Checkable {
    private static final int[] CHECKED_STATE_SET = {
            android.R.attr.state_activated,
            android.R.attr.state_checked,
    };

    private boolean mChecked;

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

JakeWharton

/* Base fragment to ensure the parent activity implements a contract interface. */
public abstract class ContractFragment<T> extends Fragment {
    private T mContract;

    @Override
    public void onAttach(Activity activity) {
        try {
            mContract = (T)activity;
        } catch (ClassCastException e) {
            throw new IllegalStateException(activity.getClass().getSimpleName()

JakeWharton

public class TweetAdapter extends BaseAdapter {
    // ...

    public View getView(int position, View convertView, ViewGroup parent) {
        TweetViewHolder vh = TweetViewHolder.get(convertView, parent);
        Tweet item = getItem(position);
    
        vh.user.setText(item.user);
        vh.tweet.setText(item.tweet);

JakeWharton

package com.jakewharton.utilities;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.preference.CheckBoxPreference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
import com.jakewharton.wakkawallpaper.R;