Android Archives - Dawid's Blog

findViewById in a fragment

Not quite as simple as it would seem. You can't use onCreate() method because it is called before onViewCreate(). However, you can used onViewCreate, because you inflate your view: hence you have access to it:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_stops_list, container, false);
    ListView stops = (ListView) rootView.findViewById(R.id.list_of_stops);
    if(stops != null) {
        stops.setAdapter(new ListAdapter(getActivity(), 0, Settings.cTour.getStops()));
    } else {
        Log.e(TAG, "list_of_stops not found");
    }
    return rootView;
}

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@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

View rootView = inflater.inflate(R.layout.fragment_stops_list, container, false);

ListView stops = (ListView) rootView.findViewById(R.id.list_of_stops);

if(stops != null) {

stops.setAdapter(new ListAdapter(getActivity(), 0, Settings.cTour.getStops()));

} else {

Log.e(TAG, "list_of_stops not found");

}

return rootView;

}

Speeding Up Gradle (just a little bit)

If you do any sort of Android Studio Development you might find these two lines quite useful. There is a noticeable speed up in building time.

org.gradle.daemon=true
org.gradle.parallel=true

1 2	org.gradle.daemon=true org.gradle.parallel=true

MVVM with Android - this is exciting!

This is one of the best things I've seen on Android in a long time: MVVM architecture. Of course, Android platform doesn't support it, but there is hope! RoboBinding. OK, the spec perhaps isn't the best, but the idea is great! Finally This is how simple it is with Android Studio:

buildscript {
    repositories {
        mavenCentral()
        maven() {
            name 'RoboBinding AspectJPlugin Maven Repository'
            url "https://github.com/RoboBinding/RoboBinding-aspectj-plugin/raw/master/mavenRepo"
            //url "file://D:/git/RoboBinding-aspectj-plugin/mavenRepo"
        }
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:1.+'
        classpath 'com.neenbedankt.gradle.plugins:android-apt:1.+'
        classpath 'org.robobinding:aspectj-plugin:0.8.4'
    }
}

apply plugin: 'com.android.application'
apply plugin: 'com.neenbedankt.android-apt'
apply plugin: 'org.robobinding.android-aspectj'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.1"

    defaultConfig {
        minSdkVersion 8
        targetSdkVersion 21

        testApplicationId 'org.robobinding.albumsampletest'
        testInstrumentationRunner "android.test.InstrumentationTestRunner"
        testHandleProfiling true
        testFunctionalTest true
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_6
        targetCompatibility JavaVersion.VERSION_1_6
    }

    lintOptions {
        disable 'UnusedAttribute', 'ValidFragment', 'GradleDependency', 'OnClick', 'MissingPrefix', 'MenuTitle'
    }

    signingConfigs {
        release {
            storeFile file('robobinding.keystore')
            storePassword '123456'
            keyAlias 'robobinding'
            keyPassword '123456'
        }
    }

    buildTypes {
        release {
            minifyEnabled true
            proguardFiles 'proguard-rules.txt'
            signingConfig signingConfigs.release
        }
    }
}

repositories {
    mavenCentral()
    maven() {
        name 'SonaType snapshot repository'
        url 'https://oss.sonatype.org/content/repositories/snapshots'
        //url "file://D:/git/RoboBinding/framework/mavenRepo"
    }
    /*
   maven() {
        name 'RoboBinding Framework Maven Repository'
        url "file://D:/git/RoboBinding/framework/mavenRepo"
    }
    maven() {
        name 'RoboBinding CodeGen Maven Repository'
        url "file://D:/git/RoboBinding/codegen/mavenRepo"
    }*/
}

ext {
    robobindingVersion = 'latest.integration'
    //robobindingVersion = '0.8.8'
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.1.1'
    compile ("org.robobinding:robobinding:$robobindingVersion:with-aop-and-dependencies") {
        exclude group: 'com.google.guava', module: 'guava'
    }
    //aspectPath fileTree(dir: 'libs', include: '*.jar')
    aspectPath ("org.robobinding:robobinding:$robobindingVersion:with-aop-and-dependencies") {
        exclude group: 'com.google.guava', module: 'guava'
    }
    apt "org.robobinding:codegen:$robobindingVersion"

    androidTestCompile 'com.jayway.android.robotium:robotium-solo:5.2.1'
}

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buildscript {

repositories {

mavenCentral()

maven() {

name 'RoboBinding AspectJPlugin Maven Repository'

url "https://github.com/RoboBinding/RoboBinding-aspectj-plugin/raw/master/mavenRepo"

//url "file://D:/git/RoboBinding-aspectj-plugin/mavenRepo"

}

dependencies {

classpath 'com.android.tools.build:gradle:1.+'

classpath 'com.neenbedankt.gradle.plugins:android-apt:1.+'

classpath 'org.robobinding:aspectj-plugin:0.8.4'

}

apply plugin: 'com.android.application'

apply plugin: 'com.neenbedankt.android-apt'

apply plugin: 'org.robobinding.android-aspectj'

android {

compileSdkVersion 21

buildToolsVersion "21.1.1"

defaultConfig {

minSdkVersion 8

targetSdkVersion 21

testApplicationId 'org.robobinding.albumsampletest'

testInstrumentationRunner "android.test.InstrumentationTestRunner"

testHandleProfiling true

testFunctionalTest true

}

compileOptions {

sourceCompatibility JavaVersion.VERSION_1_6

targetCompatibility JavaVersion.VERSION_1_6

}

lintOptions {

disable 'UnusedAttribute', 'ValidFragment', 'GradleDependency', 'OnClick', 'MissingPrefix', 'MenuTitle'

}

signingConfigs {

release {

storeFile file('robobinding.keystore')

storePassword '123456'

keyAlias 'robobinding'

keyPassword '123456'

}

buildTypes {

release {

minifyEnabled true

proguardFiles 'proguard-rules.txt'

signingConfig signingConfigs.release

}

repositories {

mavenCentral()

maven() {

name 'SonaType snapshot repository'

url 'https://oss.sonatype.org/content/repositories/snapshots'

//url "file://D:/git/RoboBinding/framework/mavenRepo"

}

/*

maven() {

name 'RoboBinding Framework Maven Repository'

url "file://D:/git/RoboBinding/framework/mavenRepo"

}

maven() {

name 'RoboBinding CodeGen Maven Repository'

url "file://D:/git/RoboBinding/codegen/mavenRepo"

}*/

}

ext {

robobindingVersion = 'latest.integration'

//robobindingVersion = '0.8.8'

}

dependencies {

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

compile 'com.android.support:appcompat-v7:22.1.1'

compile ("org.robobinding:robobinding:$robobindingVersion:with-aop-and-dependencies") {

exclude group: 'com.google.guava', module: 'guava'

}

//aspectPath fileTree(dir: 'libs', include: '*.jar')

aspectPath ("org.robobinding:robobinding:$robobindingVersion:with-aop-and-dependencies") {

exclude group: 'com.google.guava', module: 'guava'

}

apt "org.robobinding:codegen:$robobindingVersion"

androidTestCompile 'com.jayway.android.robotium:robotium-solo:5.2.1'

}

Activity code:

package com.example.associativelearning;

import android.app.Activity;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

import viewmodels.MainActivityViewModel;
import org.robobinding.binder.Binders;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        MainActivityViewModel presentationModel = new MainActivityViewModel();
        View rootView = Binders.inflateAndBindWithoutPreInitializingViews(this,
                R.layout.activity_main,
                presentationModel);
        setContentView(rootView);
    }

}

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package com.example.associativelearning;

import android.app.Activity;

import android.support.v7.app.ActionBarActivity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import viewmodels.MainActivityViewModel;

import org.robobinding.binder.Binders;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

MainActivityViewModel presentationModel = new MainActivityViewModel();

View rootView = Binders.inflateAndBindWithoutPreInitializingViews(this,

R.layout.activity_main,

presentationModel);

setContentView(rootView);

}

Defining your actions in XML makes your code that much cleaner

This is a nice hack when developing apps in Android (similar to JavaFX) - define the on click events in XML:

 <Button .... android:onClick="clicked" />

1	<Button .... android:onClick="clicked" />

In the Activity, we can specify the method:

public void clicked(View view) {
/// this will get triggered
}

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public void clicked(View view) {

/// this will get triggered

}

This is much cleaner than:

button.setOnClickListener(...);

1	button.setOnClickListener(...);

Logging information in Android Apps

Being a bit of a reliability freak, I really enjoy knowing what's going on in my app. How it moves from one line of code to the next. Verbose The word "verbose" literally means more words than necessary. This mode usually show how the program's flow control.

// Verbose
Log.v(TAG, "About to create a thread");
Thread t = new Thread();
Log.v(TAG, "Created a thread");

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// Verbose

Log.v(TAG, "About to create a thread");

Thread t = new Thread();

Log.v(TAG, "Created a thread");

Debug Debugging has the next level in

Adding Info Dialog to Android App

This is how simple adding a dialogue is to Android:

    new AlertDialog.Builder(this).setTitle("Title").setMessage("The Message")
            .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                }
    }).show();

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new AlertDialog.Builder(this).setTitle("Title").setMessage("The Message")

.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

}

}).show();

Adding background to a DrawingView in Android

Yesterday, I was attempting to add a background to my DrawingView - something which IMHO should be ridiculously simple. Yet, after trying to various combinations of Bitmap, Drawable even ImageView types, nothing worked. Although you can do it directly in the XML, I had my DrawingView defined in Java file rather than XML. In the

Category: Android

findViewById in a fragment

Speeding Up Gradle (just a little bit)

MVVM with Android - this is exciting!

Defining your actions in XML makes your code that much cleaner

Logging information in Android Apps

Adding Info Dialog to Android App

Adding background to a DrawingView in Android

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