"DISCOUNT 15%" + nf. This.getApplicationContext().getResources().getDrawableForDensity(R.drawable.logo,ĭisplayMetrics.DENSITY_LOW, getTheme())) + "\n" + Public class MainActivity extends AppCompatActivity, MainActivity.PERMISSION_BLUETOOTH) īluetoothConnection connection = lectFirstPaired() ĮscPosPrinter printer = new EscPosPrinter(connection, 203, 48f, 32) įinal String text = "" + PrinterTextParserImg.bitmapToHexadecimalString(printer, While fetching data we will show a progress dialog. We can also retrieve data and show them into a ListView.
Well that was a HTTP POST request we were making. Previously we had seen how to connect to mysql and isnert data into database from android. Below is the working example of the activity class and the text watcher. Android MySQL Select and Show in ListView (HTTPURLConnection). To apply this text watcher class we call the the addTextChangedListener() method of the EditText object of the currency input and pass an instance of MoneyTextWatcher. Handling a connection requires following steps: 1) Load the driver. In this post, I am giving an example of making a connection with database using MySQL Driver. No need to load MySQL driver class explicitly. If you have never written Java code to connect MySQL before, it’s worth reading this tutorial from the beginning. In the MoneyTextWatcher class we implement the afterTextChanged(EditText s) method, in this method the currency formatting takes place. But it is important to learn basics and it requires learning JDBC first. If you just want to see the code example, click on Code example: a simple program connects to MySQL. I do not know whether it is a connection problem or not.
It only displays the actions given in catch section. To format the input value we will create a text watcher class called MoneyTextWatcher, this class implements of the interface. I used the following code to connect MySQL in localhost from Android. To get column data of the current row, you use getDataType() method where DataType is the data type of the column e.g., int, string, double, etc.The following Android code snippet shows you how to customize the input value format of an EditText component for accepting currency number. You must call the next() method at least one before reading data because before the first next() call, the ResultSet is located before the first row. The next() method returns true and move to the next row in the ResultSet if there are rows available, otherwise it returns false.
The ResultSet object provides you with methods to traverse the result and read the data. The result is in the form of rows with columns of data based on the SELECT statement. This method returns a ResultSet object that contains result of the SQL query. We have called the executeQuery() method of the Statement object. ResultSet rs = stmt.executeQuery(sql) Code language: SQL (Structured Query Language) ( sql ) String sql = " SELECT first_name, last_name, email " +
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