patrickhammond

Platform versions

• 1.5 (3 - Cupcake)
• 1.6 (4 - Donut)
• 2.0 through 2.1 (5, 6, 7 - Eclair)
• 2.2 (8 - Froyo)
• 2.3.1 through 2.3.3 (9, 10 - Gingerbread)
• 3.0 through 3.2 (11 - Honeycomb)
• 4.0.0 (14 - Ice Cream Sandwich)
• 4.0.3 (15 - Ice Cream Sandwich - MR1)
• 4.1.2 (16 - Jelly Bean)

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

Display the certificate used to sign the APK: keytool -list -printcert -jarfile app-release.apk

Display how each APK file is signed: jarsigner -verify -verbose -certs app-release.apk

Display certificate information: keytool -list -v -keystore yourkeystore -alias youralias

Display some of the info around how the APK presents itself: aapt d badging app-prod-release.apk

Decompile an existing APK: apktool d app-prod-release.apk (see: https://code.google.com/p/android-apktool)

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

#!/bin/sh
find . -name *.iml -print0 | xargs -0 rm
rm -rf .idea/

patrickhammond

public Class CustomView {
  public CustomView(Context context, AttributeSet attrs) {
    super(context, attrs);
   
    // Makes the developer tools happy when previewing stuff 
    if (isInEditMode()) {
      return;
    }
  }
}

patrickhammond

Context

I was previously using https://gist.github.com/dmarcato/d7c91b94214acd936e42 to strip down Google Mobiele Services, but the build times for my project in Android Studio consistently exceeded 75 seconds; this solution is much less dynamic (and even a little ugly) but keeps my build times less than 15s.

Assumptions

• Your app module has a directory named aars that will work as a project specific Maven repository; this directory should be placed under version control.
  • Once https://code.google.com/p/android/issues/detail?id=55863 is resolved and released things might get a little cleaner,
• Maven (mvn) is installed and available on your path when running this script.

Usage

patrickhammond

import android.os.Parcel;
import android.os.Parcelable;

public class ParcelableHelper {
    /**
     * There is not always a guarantee that Parcelable values will be immediately written out and
     * read back in.  For data data that mutable (its own issue), this can be a problem.  This is
     * for the times when it would be great to have confidence that you will be working with a copy
     * of that data.
     */

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

public class DevicePhoneNumber {
    public final String phoneNumber;

    public DevicePhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    @Override
    public String toString() {
        return "DevicePhoneNumber{" +