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If you want to check unique device id like IMEI number through programmatically we can do this by telephonic manger as shown below example −Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.Manifest; import android.annotation.SuppressLint; import android.app.ProgressDialog; import android.content.pm.PackageManager; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.support.annotation.RequiresApi; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AppCompatActivity; import android.telephony.TelephonyManager; import android.view.View; import android.view.inputmethod.InputMethodManager; import android.widget.Button; import android.widget.EditText; import ... Read More
There are some situations, we should find keyboard is visible or not in particular activity. In this example we can check visibility of virtual keyboard on android.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.javaimport android.graphics.Rect; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.constraint.ConstraintLayout; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.View; import android.view.ViewTreeObserver; import android.view.inputmethod.InputMethodManager; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public ... Read More
To get table names using SELECT statement, use “information_schema.tables”. Let us see an example, wherein we have a database that contains 3 tables. The syntax to get all table names with the help of SELECT statement. SELECT Table_name as TablesName from information_schema.tables where table_schema = 'yourDatabaseName'; Using database “test”, and applying the above syntax to get the table names using SELECT mysql> use test; Database changed mysql> SELECT Table_name as TablesName from information_schema.tables where table_schema = 'test'; Output with the name of the three tables. +--------------------+ | TablesName ... Read More
To prepend a string to a column value in MySQL, we can use the function CONCAT. The CONCAT function can be used with UPDATE statement. Creating a table. mysql> create table PrependStringOnCOlumnName -> ( -> Id int, -> Name varchar(200) -> ); Query OK, 0 rows affected (1.35 sec) Inserting some records. mysql> insert into PrependStringOnCOlumnName values(1, 'John'); Query OK, 1 row affected (0.12 sec) mysql> insert into PrependStringOnCOlumnName values(2, 'Carol'); Query OK, 1 row affected (0.18 sec) mysql> insert into PrependStringOnCOlumnName values(3, 'Johnson'); Query OK, 1 row affected (0.45 sec) ... Read More
We can enable it with the help of the SET command with GLOBAL. The first time, local infile will be off. The following is the syntax. mysql> SHOW GLOBAL VARIABLES LIKE 'local_infile'; Here is the output. +---------------+-------+ | Variable_name | Value | +---------------+-------+ | local_infile | OFF | +---------------+-------+ 1 row in set (0.01 sec) We can enable the local infile with the help of ON or boolean value true or numeric value 1. The following is the syntax to enable the local infile. mysql> SET GLOBAL local_infile = 'ON'; Query OK, 0 ... Read More
The backup of a table can be made with the help of backup table as well as mysqldump utility. The backup table concept was used in MySQL version 5.0 and its earlier version. Here, I am performing backup with the help of mysqldump. Firstly, we will open cmd with the help of shortcut key. The mysqldump will run at the cmd. Therefore, firstly open cmd with the help of shortcut key − windowskey+R; Here is the snapshot − Now, cmd will open − In this, the MySQL bin folder is present at the following location − ... Read More
We can pass an array with the help of where IN clause. Let us first create a new table for our example. mysql> create table PassingAnArrayDemo -> ( -> id int, -> Firstname varchar(100) -> ); Query OK, 0 rows affected (1.60 sec) Let us now insert records. mysql> insert into PassingAnArrayDemo values(1, 'John'), (2, 'Carol'), (3, 'Smith'), (4, 'Bob'), (5, 'Johnson'), (6, 'David'), (7, 'Sam'), (8, 'Jessica'); Query OK, 8 rows affected (0.32 sec) Records: 8 Duplicates: 0 Warnings: 0 To display all records. mysql> select *from PassingAnArrayDemo; The ... Read More
The hashed password data type depends upon which hashing algorithm we are using. The hashing algorithm does not depends upon the input size because it produces a result of the same length. It gives the result in a series of hexadecimal digits, and we can reduce the hexadecimal digits by half with the help of UNHEX() function. There are various algorithms and data types to store values. MD5 − It can use char(32) or BINARY(16). SHA-1 − It can use data type char(40) or BINARY(20). Example of MD5 The following is an example − mysql> select MD5('This ... Read More
As the name “SHA256” suggest, it is 256 bits long. If we are using hexadecimal notation then digit codes represent 4 bits. In order to represent 256, we need 256/4 = 64 bits. We need a data type varchar(64) or char(64). Creating a table for our example. mysql> create table SHA256Demo -> ( -> Password varchar(64) -> ); Query OK, 0 rows affected (0.54 sec) Inserting records into table. mysql> insert into SHA256Demo values(' 4e2e1a39dba84a0b5a91043bb0e4dbef23970837'); Query OK, 1 row affected (0.18 sec) Displaying all records. mysql> select *From SHA256Demo; The following ... Read More
The ibdata1 file cannot shrink, it is a particularly troublesome feature of MySQL. The ibdata1 file can be shrinked if you delete all databases, remove the files and reload the mysqldump. We can configure MySQL so that each table, including its indexes, is stored as a separate file. It is enabled by default as of version 5.6.6 of MySQL. To setup our server to use separate files for each table, we need to change my.cnf in order to enable it. If your MySQL version is below 5.6.6, then you need to add it in my.cnf file. [mysqld] ... Read More