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private long mLastClickTime = 0;

...

// inside onCreate or so:

findViewById(R.id.button).setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        // mis-clicking prevention, using threshold of 1000 ms

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#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#define NUM_LINE 10	
float arrayIndex[NUM_LINE];

int getArrayIndex(float min, float max, float unit) {
	float tmp, grp_unit;
	float grp_min, grp_max;

nguyenlinhnttu

    public static void makeFullTranspatentStatusBar(Activity activity) {
        if (Build.VERSION.SDK_INT >= 19 && Build.VERSION.SDK_INT < 21) {
            setWindowFlag(activity, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, true);
        }
        if (Build.VERSION.SDK_INT >= 19) {
            activity.getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
        }
        if (Build.VERSION.SDK_INT >= 21) {
            setWindowFlag(activity, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, false);
            activity.getWindow().setStatusBarColor(ContextCompat.getColor(activity, R.color.color_tran_opacity));

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Build Gradles
===============
//Retrofit
    compile 'com.squareup.retrofit2:converter-gson:2.3.0'
    compile 'io.reactivex.rxjava2:rxjava:2.1.6'
    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
    compile 'com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0'

    //Retrofit logs
    compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'

nguyenlinhnttu

package com.location;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentSender;
import android.location.Location;

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public class NetWorkUtils {
    public static boolean isNetworkAvailable(Context context) {
        ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService("connectivity");
        if (connectivity == null) {
            return false;
        }
        NetworkInfo[] info = connectivity.getAllNetworkInfo();
        if (info == null) {
            return false;
        }

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#================================= DEFAULT PROGUARD RULES =========================================#
#Use 5 step of optimization
-optimizationpasses 5

#When not preverifing in a case-insensitive filing system, such as Windows. This tool will unpack your processed jars,(if using windows you should then use):
-dontusemixedcaseclassnames

#Specifies not to ignore non-public library classes. As of version 4.5, this is the default setting
-dontskipnonpubliclibraryclasses

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##Getting results from DialogFragments to another Fragment.

When setting up the DialogFragment make a call to Fragment.setTargetFragment()
Then from DialogFragment you can access the main fragment with Fragment.getTargetFragment()
Use interfaces to provide the required actions to the calling Fragment.

##Example code.

###AddFriendDialogFragment - Calls back to calling fragment.

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public class CustomFontTextView extends AppCompatTextView {
    private static final String ANDROID_SCHEMA = "http://schemas.android.com/apk/res/android";

    public CustomFontTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        applyCustomFont(context, attrs);
    }

    public CustomFontTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

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public void goapps(View v) {
        Intent intent = new Intent("android.intent.action.VIEW");
        intent.setData(Uri.parse("market://search?q=pub:ltsolution"));
        startActivity(intent);
    }