aldakur

// Check the condition as
if (android.os.Build.VERSION.SDK_INT>=11){
    //Do something
}

// This is better
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB){
    //Do something
}

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//When the class extends from Activity
ActionBar actionBar = getActionBar();
actionBar.hide(); //hide
actinBar.show();  //Show

//When the class extends from AppCompatActivity
getSupportActionBar().hide(); //hide
getSupportActionBar().show(); //show

//In FragmentActivity, you need to change the FragmentActivity to an ActionBarActivity, 

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// String resource. normal method
btnRutas.setText(R.string.rutas);

// Get resources dynamically. When string variable is different in some cases
String variable = ruta.getDescripcion(); //For example, now variable is "car_description" 
int intVariableForTranslate = context.getResources().getIdentifier(variable, "string", context.getPackageName());
String descriptionTranslated = context.getString(intVariableForTranslate);

// String resource
String myString = getResources().getString(R.string.mystring)

aldakur

//First activity (ActivityA). The data is in editText (et1)

Intent i = new Intent(this, ActivityB.class); 
i.putExtra("textByUser", et1.getText().toString()); 
startActivity(i);

//Second activity (ActivityB). Get data
Bundle bundle = getIntent().getExtras(); 
String data = bundle.getString("textByUser");

aldakur

package com.gunhansancar.android.sdk.helper;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.preference.PreferenceManager;

import java.util.Locale;

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package com.gunhansancar.android.example.application;

import android.app.Application;

import com.gunhansancar.android.sdk.helper.LocaleHelper;

/**
 * When your application is launched this class is loaded before all of your activies.
 * And the instance of this class will live through whole application lifecycle.
 * <p/>

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package com.gunhansancar.android.example.activity;

import android.content.res.Resources;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

import com.gunhansancar.android.example.R;
import com.gunhansancar.android.sdk.helper.LocaleHelper;

import butterknife.Bind;

aldakur

// [ES] Hilo dormilón
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class ThreadSleepyheadIndependentClass extends AppCompatActivity {

aldakur

// [ES] Hilo dormilón

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class ThreadSleepyhead extends AppCompatActivity {

aldakur

// [EU] Hari berdinean (app-aren hari nagusia) interfaze aldaketa burutzeko. Kasu honetan
// TextView baten aldaketa

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;