Category: Java

Android app dev: Intent extras set in onBackPressed() misssing when back to onActivityResult()

It’s funny how we spent about an hour trying to figure out why the Intent extras that we’re setting are not being sent back to onActivityResult(). If we only knew that the solution was as simple as moving one line of code.

The call to super.onBackPressed() should be placed after setting Intent extras and after finishing the current activity. Like so:

    @Override
    public void onBackPressed() {

Intent intent = new Intent(CurrentActivity.this, MainActivity.class);
intent.putExtra(“myData”, “success”);
            setResult(RESULT_OK, intent);
            finish();
            super.onBackPressed();

}

@Override

public void onBackPressed() {

Intent intent = new Intent(CurrentActivity.this, MainActivity.class);

intent.putExtra(“myData”, “success”);

setResult(RESULT_OK, intent);

finish();

super.onBackPressed();

}

January 15, 2018

Android app dev: Missing import org.apache.commons.lang3.text.WordUtils;

I use a few instances of WordUtils.capitalizeFully() on an Android app that I’ve been working on. And there are times when the import org.apache.commons.lang3.text.WordUtils; breaks, sometimes after merging with some of my git branches.

To fix this, what I do is open app/build.gradle and add the following line under dependencies:

compile ‘org.apache.commons:commons-lang3:3.4’

1

compile ‘org.apache.commons:commons-lang3:3.4’

Hope this saves somebody else’s day 😆 I got the solution from How to add org.apache.commons.lang3 to AndroidStudio with gradle

November 7, 2017

Simple SMS Reader app in Android using BroadcastReceiver class

Before I began coding Android apps, I was amazed how verification processes go like this: The Android app tells you they’ll send you an SMS containing verification code, and that you need to enter such code into a text field on the Android app. But when you receive the SMS, the verification code appears on the text field before you even type! I was like, whoa, how do they do that?

Now that I am able to develop simple Android apps, I already have an idea how it’s done.

We extend a class called BroadcastReceiver and implement its onReceive() method. This receiver is then registered either in the AndroidManifest.xml file, or registered as needed in a .java file (e.g., Activity)

I’m registering mine in my MainActivity file. I’ll provide the link to my project files on Github later on this page, but for now here’s what it looks like:

public class MainActivity extends AppCompatActivity {

    private SmsReceiver receiver;

    private TextView tv_sms_from;
    private TextView tv_sms_message;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv_sms_from = (TextView) findViewById(R.id.tv_sms_from);
        tv_sms_message = (TextView) findViewById(R.id.tv_sms_message);

        receiver = new SmsReceiver(new Handler()); // create receiver
        registerReceiver(receiver, new IntentFilter(“android.provider.Telephony.SMS_RECEIVED”));

    }

    public class SmsReceiver extends BroadcastReceiver {

        private SharedPreferences preferences;
        private String TAG = “SmsReceiver”;

        private final Handler handler; // for executing code on UI thread

        public SmsReceiver(Handler handler){
            this.handler = handler;
        }

        @Override
        public void onReceive(Context context, Intent intent) {
            // TODO Auto-generated method stub

            if(intent.getAction().equals(“android.provider.Telephony.SMS_RECEIVED”)){
                Bundle bundle = intent.getExtras();

                //—get the SMS message passed in—
                SmsMessage[] msgs = null;
                if (bundle != null){
                    //—retrieve the SMS message received—
                    try{
                        Object[] pdus = (Object[]) bundle.get(“pdus”);
                        msgs = new SmsMessage[pdus.length];
                        for(int i=0; i<msgs.length; i++){
                            msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
                            final String msgFrom = msgs[i].getOriginatingAddress();
                            final String msgBody = msgs[i].getMessageBody();

                            Log.d(TAG, “SMS Received! From: ” + msgFrom + “, Message: ” + msgBody);

                            // post the UI-updating code to our Handler
                            handler.post(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(MainActivity.this, “SMS Received!”, Toast.LENGTH_LONG).show();
                                    tv_sms_from.setText(“From: ” + msgFrom);
                                    tv_sms_message.setText(“Message: ” + msgBody);
                                }
                            });

                        }
                    } catch(Exception e){
                            Log.d(“Exception caught”,e.getMessage());
                    }
                }
            }
        }
    }

}

public class MainActivity extends AppCompatActivity {

private SmsReceiver receiver;

private TextView tv_sms_from;

private TextView tv_sms_message;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

tv_sms_from = (TextView) findViewById(R.id.tv_sms_from);

tv_sms_message = (TextView) findViewById(R.id.tv_sms_message);

receiver = new SmsReceiver(new Handler()); // create receiver

registerReceiver(receiver, new IntentFilter(“android.provider.Telephony.SMS_RECEIVED”));

}

public class SmsReceiver extends BroadcastReceiver {

private SharedPreferences preferences;

private String TAG = “SmsReceiver”;

private final Handler handler; // for executing code on UI thread

public SmsReceiver(Handler handler){

this.handler = handler;

}

@Override

public void onReceive(Context context, Intent intent) {

// TODO Auto-generated method stub

if(intent.getAction().equals(“android.provider.Telephony.SMS_RECEIVED”)){

Bundle bundle = intent.getExtras();

//—get the SMS message passed in—

SmsMessage[] msgs = null;

if (bundle != null){

//—retrieve the SMS message received—

try{

Object[] pdus = (Object[]) bundle.get(“pdus”);

msgs = new SmsMessage[pdus.length];

for(int i=0; i<msgs.length; i++){

msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);

final String msgFrom = msgs[i].getOriginatingAddress();

final String msgBody = msgs[i].getMessageBody();

Log.d(TAG, “SMS Received! From: “ + msgFrom + “, Message: “ + msgBody);

// post the UI-updating code to our Handler

handler.post(new Runnable() {

@Override

public void run() {

Toast.makeText(MainActivity.this, “SMS Received!”, Toast.LENGTH_LONG).show();

tv_sms_from.setText(“From: “ + msgFrom);

tv_sms_message.setText(“Message: “ + msgBody);

}

});

}

} catch(Exception e){

Log.d(“Exception caught”,e.getMessage());

}

I first created a class called SmsReceiver which extends the BroadcastReceiver class that I mentioned earlier. Inside it, there’s an implemented method onReceive(), where we first check if the Intent’s action is android.provider.Telephony.SMS_RECEIVED, otherwise we do nothing. We read message(s) that the Android devices just received and get the originating address (e.g. phone number of sender) and message body. Then lastly, the TextViews in the XML file are updated with the originating address and message body so you could see that thea app works.

By the way, I used a Handler in this app so that I could set the values of TextViews inside the MainActivity’s XML file. A new Handler object is passed from MainActivity.onCreate() to the SmsReceiver constructor. And later on once the message originating address and message body are available in BroadcastReceiver.onReceive(), we use the handler to “post” and set the TextView values.

Now, for the source files of this Android app…

Feel free to download my Android project files here: Android-Incoming-SMS-Reader

Resource:
http://stackoverflow.com/a/14648933

January 3, 2017

Java: method to convert degrees into directions (16-wind compass rose)

I’m working on a weather app for Android. The data for wind direction that I get from the weather API is in form of degrees (0 to 360). I want to display wind direction in a user-friendly format such as N (North), NNE (North-northeast), NE (Northeast), ENE (East-Northeast), E (East), ESE (East-Southeast), SE (Southeast), SSE (South-Southeast), S (South), SSW (South-Southwest), SW (Southwest), WSW (West-Southwest), W (West), WNW (West-Northwest), NW (Northwest), and NNW (North-Northwest). I think this is more user-friendly, at least when compared to degrees format.

16-wind compass rose
The eight half-winds are the points obtained by bisecting the angles between the principal winds. The half-winds are north-northeast (NNE), east-northeast (ENE), east-southeast (ESE), south-southeast (SSE), south-southwest (SSW), west-southwest (WSW), west-northwest (WNW) and north-northwest (NNW). Notice that the name is constructed simply by combining the names of the principal winds to either side, with the cardinal wind coming first, the ordinal wind second. The eight principal winds and the eight half-winds together yield a 16-wind compass rose, with each compass point at a 22 1⁄2° angle from the next.

Points of the Compass

And here is the Java method that I prepared so I can convert direction data from degrees into directions (16-wind compass rose):

public String convertDegreeToCardinalDirection(int directionInDegrees){
    String cardinalDirection = null;
    if( (directionInDegrees >= 348.75) && (directionInDegrees <= 360) ||
        (directionInDegrees >= 0) && (directionInDegrees <= 11.25)    ){
        cardinalDirection = “N”;
    } else if( (directionInDegrees >= 11.25 ) && (directionInDegrees <= 33.75)){
        cardinalDirection = “NNE”;
    } else if( (directionInDegrees >= 33.75 ) &&(directionInDegrees <= 56.25)){
        cardinalDirection = “NE”;
    } else if( (directionInDegrees >= 56.25 ) && (directionInDegrees <= 78.75)){
        cardinalDirection = “ENE”;
    } else if( (directionInDegrees >= 78.75 ) && (directionInDegrees <= 101.25) ){
        cardinalDirection = “E”;
    } else if( (directionInDegrees >= 101.25) && (directionInDegrees <= 123.75) ){
        cardinalDirection = “ESE”;
    } else if( (directionInDegrees >= 123.75) && (directionInDegrees <= 146.25) ){
        cardinalDirection = “SE”;
    } else if( (directionInDegrees >= 146.25) && (directionInDegrees <= 168.75) ){
        cardinalDirection = “SSE”;
    } else if( (directionInDegrees >= 168.75) && (directionInDegrees <= 191.25) ){
        cardinalDirection = “S”;
    } else if( (directionInDegrees >= 191.25) && (directionInDegrees <= 213.75) ){
        cardinalDirection = “SSW”;
    } else if( (directionInDegrees >= 213.75) && (directionInDegrees <= 236.25) ){
        cardinalDirection = “SW”;
    } else if( (directionInDegrees >= 236.25) && (directionInDegrees <= 258.75) ){
        cardinalDirection = “WSW”;
    } else if( (directionInDegrees >= 258.75) && (directionInDegrees <= 281.25) ){
        cardinalDirection = “W”;
    } else if( (directionInDegrees >= 281.25) && (directionInDegrees <= 303.75) ){
        cardinalDirection = “WNW”;
    } else if( (directionInDegrees >= 303.75) && (directionInDegrees <= 326.25) ){
        cardinalDirection = “NW”;
    } else if( (directionInDegrees >= 326.25) && (directionInDegrees <= 348.75) ){
        cardinalDirection = “NNW”;
    } else {
        cardinalDirection = “?”;
    }

    return cardinalDirection;
}

public String convertDegreeToCardinalDirection(int directionInDegrees){

String cardinalDirection = null;

if( (directionInDegrees >= 348.75) && (directionInDegrees <= 360) ||

(directionInDegrees >= 0) && (directionInDegrees <= 11.25) ){

cardinalDirection = “N”;

} else if( (directionInDegrees >= 11.25 ) && (directionInDegrees <= 33.75)){

cardinalDirection = “NNE”;

} else if( (directionInDegrees >= 33.75 ) &&(directionInDegrees <= 56.25)){

cardinalDirection = “NE”;

} else if( (directionInDegrees >= 56.25 ) && (directionInDegrees <= 78.75)){

cardinalDirection = “ENE”;

} else if( (directionInDegrees >= 78.75 ) && (directionInDegrees <= 101.25) ){

cardinalDirection = “E”;

} else if( (directionInDegrees >= 101.25) && (directionInDegrees <= 123.75) ){

cardinalDirection = “ESE”;

} else if( (directionInDegrees >= 123.75) && (directionInDegrees <= 146.25) ){

cardinalDirection = “SE”;

} else if( (directionInDegrees >= 146.25) && (directionInDegrees <= 168.75) ){

cardinalDirection = “SSE”;

} else if( (directionInDegrees >= 168.75) && (directionInDegrees <= 191.25) ){

cardinalDirection = “S”;

} else if( (directionInDegrees >= 191.25) && (directionInDegrees <= 213.75) ){

cardinalDirection = “SSW”;

} else if( (directionInDegrees >= 213.75) && (directionInDegrees <= 236.25) ){

cardinalDirection = “SW”;

} else if( (directionInDegrees >= 236.25) && (directionInDegrees <= 258.75) ){

cardinalDirection = “WSW”;

} else if( (directionInDegrees >= 258.75) && (directionInDegrees <= 281.25) ){

cardinalDirection = “W”;

} else if( (directionInDegrees >= 281.25) && (directionInDegrees <= 303.75) ){

cardinalDirection = “WNW”;

} else if( (directionInDegrees >= 303.75) && (directionInDegrees <= 326.25) ){

cardinalDirection = “NW”;

} else if( (directionInDegrees >= 326.25) && (directionInDegrees <= 348.75) ){

cardinalDirection = “NNW”;

} else {

cardinalDirection = “?”;

}

return cardinalDirection;

}

September 23, 2016

Android M runtime permissions utility class

Hello world, I prepared a PermissionsUtil.java class and it’s on GitHub.

Check it out: AndroidPermissionsUtil

Why use it? It will help by letting you write less code as you add conditions to your Android app that supports Android 6.0 (Marshmallow). The utility class defines helper methods that were used in the following example.

Sample usage of Android M PermissionUtils

On the activity where you need to check for runtime permissions, add these:

private final int REQ_CODE_PERMS_FEATURE01 = 1;
String[] NEEDED_PERMS_FEATURE01 = { Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE };

final PermissionsUtil permUtil = new PermissionsUtil(MainActivity.this);
permUtil.setNeededPermissions(NEEDED_PERMS_FEATURE01);
permUtil.setPermissionsRequestCode(REQ_CODE_PERMS_FEATURE01);

if(permUtil.allRequiredPermissionsGranted()){
    // proceed with what requires permission(s)
} else {
    permUtil.requestNeededPermissions();
}

private final int REQ_CODE_PERMS_FEATURE01 = 1;

String[] NEEDED_PERMS_FEATURE01 = { Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE };

final PermissionsUtil permUtil = new PermissionsUtil(MainActivity.this);

permUtil.setNeededPermissions(NEEDED_PERMS_FEATURE01);

permUtil.setPermissionsRequestCode(REQ_CODE_PERMS_FEATURE01);

if(permUtil.allRequiredPermissionsGranted()){

// proceed with what requires permission(s)

} else {

permUtil.requestNeededPermissions();

}

And add the callback function to the same activity:

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == REQ_CODE_PERMS_FEATURE01) {
            Boolean permissionRequestResult = permUtil.processPermissionsRequestResult(requestCode, permissions, grantResults);
            if(permissionRequestResult){
                // proceed to do what needed permission(s)
            } else {
                // oops, user denied permission request
            }
        } else {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }

@Override

public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

if (requestCode == REQ_CODE_PERMS_FEATURE01) {

Boolean permissionRequestResult = permUtil.processPermissionsRequestResult(requestCode, permissions, grantResults);

if(permissionRequestResult){

// proceed to do what needed permission(s)

} else {

// oops, user denied permission request

}

} else {

super.onRequestPermissionsResult(requestCode, permissions, grantResults);

}

Feel free to use in on any project. And please let me know if you have suggestions on how to improve that Android M runtime permissions utility class.

June 27, 2016

Android Studio: add Google Map from empty activity (dev note)

//Update: I prepared a simple Android app that features a Google Map with markers that form clusters together when zoomed out. Check it out: Simple Android Map Clustering on GitHub.

This “dev note” of mine will give you a rough idea on how to add a Google Map to your Android up from an empty activity, not from a pre-made Google Maps activity.

I won’t be able to write everything in detail here because I’m in a hurry, and so I’m calling this article a “dev note” instead of tutorial. 🙂 This dev note can be considered a “guide” too.

This dev note was based on Android Studio v.2.1 running on MAC OS X

From your Android Studio’s SDK Manager, install Google Play Services.

Add this as child of <application> tag in AndroidManifest.xml:

    <meta-data
        android:name=”com.google.android.geo.API_KEY”
        android:value=”YOUR_API_KEY”/>

<meta–data

android:name=“com.google.android.geo.API_KEY”

android:value=“YOUR_API_KEY”/>

Later we’ll replace YOUR_API_KEY with a key from Google API Console.

Also add these to your AndroidManifest.xml as direct child of manifest tag:

<permission android:name=”com.yourdomain.projname.permission.MAPS_RECEIVE”
        android:protectionLevel=”signature” />
<uses-permission android:name=”android.permission.ACCESS_FINE_LOCATION” />

<permission android:name=“com.yourdomain.projname.permission.MAPS_RECEIVE”

android:protectionLevel=“signature” />

<uses–permission android:name=“android.permission.ACCESS_FINE_LOCATION” />

We need to get an API KEY for the value attribute of this meta data. Let’s get one from the Google API Console — create a new project there and then search for Google Maps Android API. Enable it.

After enabling it, you’ll find a way to get an API key that we need from Google API Console. Go to Credentials -> Create Credentials -> API Key -> Android Key. Before we are given the API key, we need to provide Google API Console a SHA1 certificate fingerprint from our computer and our app’s package name.

To generate SHA1 certificate fingerprint on a Mac, type this on the terminal:

keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore -list -v

1	keytool –exportcert –alias androiddebugkey –keystore ~/.android/debug.keystore –list –v

On Windows, try this command:

keytool -list -v -keystore “%USERPROFILE%\.android\debug.keystore” -alias androiddebugkey -storepass android -keypass android

1	keytool –list –v –keystore “%USERPROFILE%\.android\debug.keystore” –alias androiddebugkey –storepass android –keypass android

When prompted for a keystore password, enter the word debug as your password.

Copy the SHA1 certificate fingerprint and then paste it into Google API Console. Enter your package name as well (e.g. com.yourdomain.projname). You’ll be given an API Key in return.

Note: My Android Studio says ‘In the Google Developer Console (https://console.developers.google.com), ensure that the “Google Maps Android API v2” is enabled.’ but I can’t find the option for V2.

Remember the meta-data tag we added in the AndroidManifest.xml? Replace the value with the API key that you just copied from Google API Console.

Resource: https://developers.google.com/maps/documentation/android-api/signup

Open app/build.gradle file and add the following as dependency:

compile ‘com.google.android.gms:play-services-maps:8.4.0’

1	compile ‘com.google.android.gms:play-services-maps:8.4.0’

Sync your project with Gradle files.

This was one of the tutorials I followed: GOOGLE MAPS ANDROID API V2 TUTORIAL USING ANDROID STUDIO and I based my XML plus Java codes on the author’s.

My files in the end…

Here were the codes of my Android app when I finally made the Google Map show up in the activity:

app/build.gradle

apply plugin: ‘com.android.application’

android {
    compileSdkVersion 23
    buildToolsVersion “23.0.3”
    defaultConfig {
        applicationId “net.catzie.maptest”
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName “1.0”
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile(‘proguard-android.txt’), ‘proguard-rules.pro’
        }
    }
}

dependencies {
    compile fileTree(dir: ‘libs’, include: [‘*.jar’])
    testCompile ‘junit:junit:4.12’
    compile ‘com.android.support:appcompat-v7:23.3.0’
    compile ‘com.google.android.gms:play-services-maps:8.4.0’
}

apply plugin: ‘com.android.application’

android {

compileSdkVersion 23

buildToolsVersion “23.0.3”

defaultConfig {

applicationId “net.catzie.maptest”

minSdkVersion 16

targetSdkVersion 23

versionCode 1

versionName “1.0”

}

buildTypes {

release {

minifyEnabled false

proguardFiles getDefaultProguardFile(‘proguard-android.txt’), ‘proguard-rules.pro’

}

dependencies {

compile fileTree(dir: ‘libs’, include: [‘*.jar’])

testCompile ‘junit:junit:4.12’

compile ‘com.android.support:appcompat-v7:23.3.0’

compile ‘com.google.android.gms:play-services-maps:8.4.0’

}

build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath ‘com.android.tools.build:gradle:2.1.0’

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories{
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

repositories {

jcenter()

}

dependencies {

classpath ‘com.android.tools.build:gradle:2.1.0’

// NOTE: Do not place your application dependencies here; they belong

// in the individual module build.gradle files

}

allprojects {

repositories{

jcenter()

}

task clean(type: Delete) {

delete rootProject.buildDir

}

app/src/main/res/layout/activity_main.xml

<?xml version=”1.0″ encoding=”utf-8″?>

<RelativeLayout xmlns:android=”http://schemas.android.com/apk/res/android”
xmlns:tools=”http://schemas.android.com/tools” android:layout_width=”match_parent”
android:layout_height=”match_parent” android:paddingLeft=”@dimen/activity_horizontal_margin”
android:paddingRight=”@dimen/activity_horizontal_margin”
android:paddingTop=”@dimen/activity_vertical_margin”
android:paddingBottom=”@dimen/activity_vertical_margin” tools:context=”.MainActivity”>

    <fragment xmlns:android=”http://schemas.android.com/apk/res/android”
        xmlns:map=”http://schemas.android.com/apk/res-auto”
        xmlns:tools=”http://schemas.android.com/tools”
        android:id=”@+id/map”
        android:name=”com.google.android.gms.maps.SupportMapFragment”
        android:layout_width=”match_parent”
        android:layout_height=”match_parent”
        tools:context=”net.catzie.maptestpremade.MapsActivity”
        class=”com.google.android.gms.maps.MapFragment” />

</RelativeLayout>

<?xml version=“1.0” encoding=“utf-8”?>

<RelativeLayout xmlns:android=“http://schemas.android.com/apk/res/android”

xmlns:tools=“http://schemas.android.com/tools” android:layout_width=“match_parent”

android:layout_height=“match_parent” android:paddingLeft=“@dimen/activity_horizontal_margin”

android:paddingRight=“@dimen/activity_horizontal_margin”

android:paddingTop=“@dimen/activity_vertical_margin”

android:paddingBottom=“@dimen/activity_vertical_margin” tools:context=“.MainActivity”>

<fragment xmlns:android=“http://schemas.android.com/apk/res/android”

xmlns:map=“http://schemas.android.com/apk/res-auto”

xmlns:tools=“http://schemas.android.com/tools”

android:id=“@+id/map”

android:name=“com.google.android.gms.maps.SupportMapFragment”

android:layout_width=“match_parent”

android:layout_height=“match_parent”

tools:context=“net.catzie.maptestpremade.MapsActivity”

class=“com.google.android.gms.maps.MapFragment” />

</RelativeLayout>

app/src/main/java/net/catzie/maptest/MainActivity.java

package net.catzie.maptest;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends AppCompatActivity {

    private static final LatLng GREENBELT1 = new LatLng(14.553048, 121.020030);
    private GoogleMap map;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();

        Marker davao = map.addMarker(new MarkerOptions().position(GREENBELT1).title(“Greenbelt 1”).snippet(“San Lorenzo, Makati”));

        // zoom in the camera to Greenbelt 1
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(GREENBELT1, 15));

        // animate the zoom process
        map.animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);
    }


}

package net.catzie.maptest;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import com.google.android.gms.maps.CameraUpdateFactory;

import com.google.android.gms.maps.GoogleMap;

import com.google.android.gms.maps.MapFragment;

import com.google.android.gms.maps.model.LatLng;

import com.google.android.gms.maps.model.Marker;

import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends AppCompatActivity {

private static final LatLng GREENBELT1 = new LatLng(14.553048, 121.020030);

private GoogleMap map;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();

Marker davao = map.addMarker(new MarkerOptions().position(GREENBELT1).title(“Greenbelt 1”).snippet(“San Lorenzo, Makati”));

// zoom in the camera to Greenbelt 1

map.moveCamera(CameraUpdateFactory.newLatLngZoom(GREENBELT1, 15));

// animate the zoom process

map.animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);

}

app/src/main/AndroidManifest.xml

<?xml version=”1.0″ encoding=”utf-8″?>
<manifest xmlns:android=”http://schemas.android.com/apk/res/android”
    package=”net.catzie.maptest” >

    <application
        android:allowBackup=”true”
        android:icon=”@mipmap/ic_launcher”
        android:label=”@string/app_name”
        android:supportsRtl=”true”
        android:theme=”@style/AppTheme” >
        <activity android:name=”.MainActivity” >
            <intent-filter>
                <action android:name=”android.intent.action.MAIN” />

                <category android:name=”android.intent.category.LAUNCHER” />
            </intent-filter>
        </activity>



        <meta-data
            android:name=”com.google.android.geo.API_KEY”
            android:value=”YOUR_OWN_API_KEY”/>
    </application>

    <permission android:name=”net.catzie.maptest.permission.MAPS_RECEIVE”
        android:protectionLevel=”signature” />




</manifest>

<?xml version=“1.0” encoding=“utf-8”?>

<manifest xmlns:android=“http://schemas.android.com/apk/res/android”

package=“net.catzie.maptest” >

<application

android:allowBackup=“true”

android:icon=“@mipmap/ic_launcher”

android:label=“@string/app_name”

android:supportsRtl=“true”

android:theme=“@style/AppTheme” >

<intent–filter>

</intent–filter>

</activity>

<meta–data

android:name=“com.google.android.geo.API_KEY”

android:value=“YOUR_OWN_API_KEY”/>

</application>

<permission android:name=“net.catzie.maptest.permission.MAPS_RECEIVE”

android:protectionLevel=“signature” />

</manifest>

…even though the Google Map now shows up on my Android activity, I get these errors that I’m not able to fix yet:

05-27 12:12:39.251 20805-20805/net.catzie.maptest E/MPlugin: Unsupported class: com.mediatek.common.telephony.IOnlyOwnerSimSupport
05-27 12:12:40.073 20805-21000/net.catzie.maptest E/[DRVB][EXT][UTIL]: disp_only_chk: DRVB CHECK DISP PROCESS DONE ! (2/0x47/0x48/0x46)
05-27 12:12:40.074 20805-21000/net.catzie.maptest E/[DRVB][EXT][UTIL]: disp_only_chk: DRVB CHECK DISP PROCESS DONE ! (720/1280/1)
05-27 12:12:40.122 20805-20960/net.catzie.maptest E/NativeCrypto: ssl=0xb8465640 cert_verify_callback x509_store_ctx=0x9f5774c8 arg=0x0
05-27 12:12:40.122 20805-20960/net.catzie.maptest E/NativeCrypto: ssl=0xb8465640 cert_verify_callback calling verifyCertificateChain authMethod=ECDHE_ECDSA
05-27 12:12:40.422 20805-21000/net.catzie.maptest E/libEGL: cache file failed CRC check
05-27 12:12:41.791 20805-20991/net.catzie.maptest E/DynamiteModule: Failed to load module descriptor class: Didn’t find class “com.google.android.gms.dynamite.descriptors.com.google.android.gms.googlecertificates.ModuleDescriptor” on path: DexPathList[[zip file “/data/app/net.catzie.maptest-2/base.apk”],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
05-27 12:12:42.355 20805-20959/net.catzie.maptest E/NativeCrypto: ssl=0xb86ce8b8 cert_verify_callback x509_store_ctx=0x9f6804f8 arg=0x0
05-27 12:12:42.355 20805-20959/net.catzie.maptest E/NativeCrypto: ssl=0xb86ce8b8 cert_verify_callback calling verifyCertificateChain authMethod=ECDHE_ECDSA

05–27 12:12:39.251 20805–20805/net.catzie.maptest E/MPlugin: Unsupported class: com.mediatek.common.telephony.IOnlyOwnerSimSupport

05–27 12:12:40.073 20805–21000/net.catzie.maptest E/[DRVB][EXT][UTIL]: disp_only_chk: DRVB CHECK DISP PROCESS DONE ! (2/0x47/0x48/0x46)

05–27 12:12:40.074 20805–21000/net.catzie.maptest E/[DRVB][EXT][UTIL]: disp_only_chk: DRVB CHECK DISP PROCESS DONE ! (720/1280/1)

05–27 12:12:40.122 20805–20960/net.catzie.maptest E/NativeCrypto: ssl=0xb8465640 cert_verify_callback x509_store_ctx=0x9f5774c8 arg=0x0

05–27 12:12:40.122 20805–20960/net.catzie.maptest E/NativeCrypto: ssl=0xb8465640 cert_verify_callback calling verifyCertificateChain authMethod=ECDHE_ECDSA

05–27 12:12:40.422 20805–21000/net.catzie.maptest E/libEGL: cache file failed CRC check

05–27 12:12:41.791 20805–20991/net.catzie.maptest E/DynamiteModule: Failed to load module descriptor class: Didn‘t find class “com.google.android.gms.dynamite.descriptors.com.google.android.gms.googlecertificates.ModuleDescriptor” on path: DexPathList[[zip file “/data/app/net.catzie.maptest-2/base.apk”],nativeLibraryDirectories=[/vendor/lib, /system/lib]]

05–27 12:12:42.355 20805–20959/net.catzie.maptest E/NativeCrypto: ssl=0xb86ce8b8 cert_verify_callback x509_store_ctx=0x9f6804f8 arg=0x0

05–27 12:12:42.355 20805–20959/net.catzie.maptest E/NativeCrypto: ssl=0xb86ce8b8 cert_verify_callback calling verifyCertificateChain authMethod=ECDHE_ECDSA

May 27, 2016

Android NetworkOnMainThreadException at StrictMode fix (with deprecated methods used)

A JSON Parser developed by some members of the Android dev team. But a few weeks after completion of the parser, several methods became deprecated.

And when we use that parser, we get errors. Part of the stack trace is as follows:

[…]
E/AndroidRuntime:  Caused by: android.os.NetworkOnMainThreadException
at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1148)
at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:251)
at java.net.InetAddress.getAllByName(InetAddress.java:229)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
[…]

[…]

E/AndroidRuntime: Caused by: android.os.NetworkOnMainThreadException

at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1148)

at java.net.InetAddress.lookupHostByName(InetAddress.java:405)

at java.net.InetAddress.getAllByNameImpl(InetAddress.java:251)

at java.net.InetAddress.getAllByName(InetAddress.java:229)

at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)

at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)

at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)

at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)

at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)

at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)

at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)

[…]

Not sure if the NetworkOnMainThreadException is being thrown because of the deprecated methods but the following code is what prevents our app from getting the error.

        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);

1 2	StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(policy);

February 4, 2016