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Post date: Mar 14, 2017 8:13:38 PM
A EditText is an overlay over TextView that configures itself to be editable. It is the predefined subclass of TextView that includes rich editing capabilities.
STYLES OF EDIT TEXT
EditText Attributes
EditText Attributes
Following are the important attributes related to EditText control. You can check Android official documentation for complete list of attributes and related methods which you can use to change these attributes are run time.
Inherited from android.widget.TextView Class −
Inherited from android.view.View Class −
Example
Example
This example will take you through simple steps to show how to create your own Android application using Linear Layout and EditText.
Following is the content of the modified main activity file src/com.example.demo/MainActivity.java. This file can include each of the fundamental lifecycle methods.
package com.example.demo; import android.os.Bundle; import android.app.Activity; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends Activity { EditText eText; Button btn; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); eText = (EditText) findViewById(R.id.edittext); btn = (Button) findViewById(R.id.button); btn.setOnClickListener(new OnClickListener() { public void onClick(View v) { String str = eText.getText().toString(); Toast msg = Toast.makeText(getBaseContext(),str,Toast.LENGTH_LONG); msg.show(); } }); } }
Following will be the content of res/layout/activity_main.xml file −
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="14dp" android:layout_marginTop="18dp" android:text="@string/example_edittext" /> <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layout_below="@+id/textView1" android:layout_marginTop="130dp" android:text="@string/show_the_text" /> <EditText android:id="@+id/edittext" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignLeft="@+id/button" android:layout_below="@+id/textView1" android:layout_marginTop="61dp" android:ems="10" android:text="@string/enter_text" android:inputType="text" /> </RelativeLayout>
Following will be the content of res/values/strings.xml to define these new constants −
<?xml version="1.0" encoding="utf-8"?> <resources> <string name="app_name">demo</string> <string name="example_edittext">Example showing EditText</string> <string name="show_the_text">Show the Text</string> <string name="enter_text">text changes</string> </resources>
Following is the default content of AndroidManifest.xml −
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.demo" > <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.example.demo.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your demo application. I assume you had created your AVD while doing environment setup. To run the app from Android studio, open one of your project's activity files and click Run
icon from the toolbar. Android Studio installs the app on your AVD and starts it and if everything is fine with your setup and application, it will display following Emulator window −
Exercise
Exercise
I will recommend to try above example with different attributes of EditText in Layout XML file as well at programming time to have different look and feel of the EditText. Try to make it editable, change to font color, font family, width, textSize etc and see the result. You can also try above example with multiple EditText controls in one activity.
Fuente https://www.tutorialspoint.com/android/android_edittext_control.htm
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