patrickhammond

/**
 * Created by Bill on 7/28/14.
 */
public class LearningApplication extends Application {

    private static final String TAG = QuickeyLearningApplication.class.getSimpleName();

    @Override
    public void onCreate() {
        super.onCreate();

patrickhammond

UI

• Great overview of spans: http://flavienlaurent.com/blog/2014/01/31/spans/

Networking

• Reachability guidance: http://guides.cocoahero.com/determining-web-service-reachability-on-android.html

Development tricks

• Placeholder text: https://plus.google.com/+AndroidDevelopers/posts/eXfegungS64

patrickhammond

public class MyActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        // Old school
        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new OnClickListener() {
            @Override

patrickhammond

// If you do this...
list.addHeaderView(headerView);

// And then call this inside of onItemClick, the position value will not be what you expect (header is now index 0)
Fruit fruit = adapter.getItem(position);
                
// This is what you really want to call inside of onItemClick
Fruit fruit = (Fruit) parent.getItemAtPosition(position);

patrickhammond

import android.graphics.Rect;
import android.view.View;
import android.widget.CheckBox;

/**
 * Enlarges the effective hit target of a checkbox to more closely match the dimensions of the
 * provided root view.  If the provided root isn't actually an ancestor view of the checkbox, bad
 * things will happen.
 * <p/>
 * See: http://developer.android.com/training/gestures/viewgroup.html#delegate

patrickhammond

public static void checkHasPermission(Context contxt, String permissionName) {
    String packageName = context.getPackageName();
    PackageManager packageManager = context.getPackageManager();
    int permissionStatus = packageManager.checkPermission(permissionName, packageName);
    if (permissionStatus != PackageManager.PERMISSION_GRANTED) {
        throw new SecurityException("Application requires <uses-permission android:name=\"" + permissionName + "\" />");
    }
}

patrickhammond

class: center, middle, title-slide

Visit for remarkjs.com for syntax

patrickhammond

/**
 * In the absence of Java 8, here is our Optional duplicated code.  Other than the package name,
 * this should be a subset of this API, http://docs.oracle.com/javase/8/docs/api/java/util/Optional.html
 */
public final class Optional<T> {
    public static <T> Optional<T> of(T value) {
        if (value == null) {
            return Optional.empty();
        }

patrickhammond

import com.google.gson.Gson;

import java.io.IOException;

public class GsonParser implements Parser {
    @Override
    public <T> T parse(String json, Class<T> clazz) throws IOException {
        return new Gson().fromJson(json, clazz);
    }
}

patrickhammond

#!/bin/sh
rm -rf app

mkdir -p app/src/main/java/com/mycompany/myapp
echo "import com.mycompany.myapp.R;" > app/src/main/java/com/mycompany/myapp/Test.java
echo "com.mycompany.myapp.SomeActivity" > app/AndroidManifest.xml