Posts by Pedro Neri • 290 points
11 posts
-
1
votes1
answer1610
viewsA: Record app data developed with React-Native in a remote Postgresql database
To use React Native together with Postgresql you will need some back-end language that can communicate with the DBMS in question, such as PHP, Java or even Node.js as the tutorial you cited. Once…
-
0
votes2
answers92
viewsA: Keep the item focus Bottomnavigationview clicked after rotate screen
Every time the mobile screen is rotated your Activity is destroyed and then restarted. If you want the data not to be lost during this rotation you will need to save them using life cycle methods.…
-
0
votes1
answer572
viewsA: React-Native scren splash screen
My first observation is that in your class code sprint you called the navigate('chat') function after a Return() call, which will make navigate never be called. A solution modifying your code a…
-
0
votes1
answer2354
viewsA: Send e-mail direct from App
Yes, this is possible! But you will need to develop a API to do this for you. This api will run on a server/cloud (which will require the mobile phone to have an internet connection) that will…
-
0
votes1
answer481
viewsA: Image Upload with Firebase and React Native using RN Image-Picker
Sometimes Base64 files come with unnecessary space bars inserted by the plugin and/or framework you are using. The Storage SDK is sensitive to these errors and fails to perform some of its internal…
-
3
votes2
answers121
viewsA: Pick up news from a website automatically
You have two alternatives to solve this problem: If you have developed the site you want to get the information from, also develop a API send you this information. To consume this API using Android,…
androidanswered Pedro Neri 290 -
0
votes3
answers1242
viewsA: Point inside a polygon
The min and max functions are from the library Algorithm of C++ see the reference in the documentation Add to your code: #import <algorithm> and change its function to use the Std namespace:…
-
1
votes1
answer1635
viewsA: Password Validation Android Studio
Use the Cursor to perform SELECT type queries more easily on Android Sqlitedatabase. See if you can solve your problem this way public void btndesligar (View view) { String query = "SELECT * FROM…
-
0
votes1
answer600
viewsA: Creating a subfolder in drawable Android Studio
You can use Android Studio with Gradle to have multiple feature directories, in app/build.Radle: android { .... android.sourceSets { main.res.srcDirs = ['src/main/pastaextra_carros', 'src/main/res']…
-
1
votes2
answers523
viewsA: Consume PHP Webservice using Java/Android
In general terms, a webservice is a function that can be accessed by another program using the web protocol (HTTP), ie if your program returns an html that can be viewed by a human, this is not a…
-
2
votes1
answer239
viewsA: React Native shows error when I try to emulate Android
The error shown is related to JRE location, Gradle is unable to find the tools.jar file.. This file is usually found in the lib folder inside the JDK folder, note that its variable is pointing to…