Android Tutorial

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android:contentDescription android:id android:onClick android:visibility This defines text that briefly describes content of the view. This supplies an identifier name for this view, This is the name of the method in this View's context to invoke when the view is clicked. This controls the initial visibility of the view. Example This example will take you through simple steps to show how to create your own Android application using Linear Layout and Button. Step Description 1 You will use Eclipse IDE to create an Android application and name it as GUIDemo4 under a package com.example.guidemo4 as explained in the Hello World Example chapter. 2 Modify src/MainActivity.java file to add a click event. 2 Modify the detault content of res/layout/activity_main.xml file to include Android UI control. 3 Define required constants in res/values/strings.xml file 4 Run the application to launch Android emulator and verify the result of the changes done in the application. Following is the content of the modified main activity filesrc/com.example.guidemo4/MainActivity.java. This file can include each of the fundamental lifecycle methods. package com.example.guidemo4; import android.os.Bundle; import android.app.Activity; import android.view.Menu; 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 { private EditText edText1,edText2,edText3; private Button btnProduct; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); addListenerOnButton(); } private void addListenerOnButton() { edText1 = (EditText)findViewById(R.id.edittext); edText2 = (EditText)findViewById(R.id.edittext2); edText3 = (EditText)findViewById(R.id.edittext3); btnProduct = (Button)findViewById(R.id.button1); TUTORIALS POINT Simply Easy Learning
tnProduct.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { String t1 = edText1.getText().toString(); String t2 = edText2.getText().toString(); String t3 = edText3.getText().toString(); int i1 = Integer.parseInt(t1); int i2 = Integer.parseInt(t2); int i3 = Integer.parseInt(t3); } }); } int product = i1*i2*i3; Toast.makeText(getApplicationContext(), String.valueOf(product),Toast.LENGTH_LONG).show(); } @Override public boolean onCreateOptionsMenu(Menu menu) { /* Inflate the menu; this adds items to the action bar if it is present */ getMenuInflater().inflate(R.menu.main, menu); return true; } Following will be the content of res/layout/activity_main.xml file:
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Android Tutorial
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ABOUT THE TUTORIAL Android Tutorial
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Accessing Resources ...............
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RadioButton .......................
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Web browser Multi-touch Multi-taski
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Alternatively, you could also right
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Step 4 - Setup Android Development
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Now select all the listed plug-ins
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CHAPTER 3 Architecture Android oper
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CHAPTER 4 Application Components Ap
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CHAPTER 5 Hello World Example Let u
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Anatomy of Android Application Befo
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else needed to run an Android appli
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The R File The gen/com.example.hell
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Congratulations!!! you have develop
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from the R.color class. drawable/ l
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Now you can set the text on a TextV
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onPause() onStop() onDestroy() The
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07-19 15:00:43.405: D/Android :(866
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To create an service, you create a
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} Example This example will take yo
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Following will be the content of
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To stop the service, you can click
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android:label="@string/app_name" an
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} { } Intent intent = new Intent();
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Now to broadcast our custom intent,
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CHAPTER 10 Content Providers A cont
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import android.net.Uri; import andr
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} super(context, DATABASE_NAME, nul
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} return count; } @Override public
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Now let's enter student Name and Gr
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You can write activities against up
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The application can embed two fragm
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Here is the list of important metho
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} } * Inflate the layout for this f
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To change the mode of the emulator
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CHAPTER 12 Intents and Filters An A
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16 17 18 19 20 21 22 23 24 25 26 27
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56 57 58 ACTION_VOICE_COMMAND Start
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21 CATEGORY_INFO Provides informati
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20 EXTRA_SHORTCUT_NAME The name of
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super.onCreate(savedInstanceState);
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Similar way you can launch phone in
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setContentView(R.layout.activity_ma
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Let's try to run
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Page 93 and 94: CHAPTER 13 UI Layouts The basic bui
Page 95 and 96: 1 You will use Eclipse IDE to creat
Page 97 and 98: Relative Layout Android RelativeLay
Page 99 and 100: Example This example will take you
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Page 103 and 104: 2 Modify the detault content of res
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Page 107 and 108: Following are the important attribu
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Page 117 and 118: Let's try to run our modified Hello
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Page 123 and 124: Kindly note above mentioned images
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Page 133 and 134: Inherited from android.view.View Cl
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Page 149 and 150: Following is the default content of
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Page 155 and 156: Let's try to run your GUIDemo6 appl
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Page 167 and 168: package com.example.guidemo9; impor
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Page 173 and 174: CHAPTER 15 Event Handling Events ar
Page 175 and 176: import android.app.Activity; import
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Page 183 and 184: Defining Styles A style is defined
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Page 189 and 190: Following example demonstrates how
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CHAPTER 17 Custom Components Androi
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1 2 3 You will use Eclipse IDE to c
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Let's try to run your DateV
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import android.content.Context; imp
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android:textSize="40sp" android:bac
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custom:delimiter="-" custom:fancyTe
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Following example shows you how to
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} Following will be the content of
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Example Following example shows the
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} } /* Invoking the default notific
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android:label="@string/app_name" an
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Next, you can click on "Detail of n
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