Android - CommonsWare

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Working with Resources /> As you can see, it is just a button, a field, and a label. The intent is for somebody to enter their name in the field, then click the button to cause the label to be updated with a formatted message containing their name. The Button in the layout file references a string resource (@string/btn_name), so we need a string resource file (res/values/strings.xml): StringsDemo Name: My name is <b>%1$s</b> The app_name resource is automatically created by the activityCreator script. The btn_name string is the caption of the Button, while our styled string format is in funky_format. Finally, to hook all this together, we need a pinch of Java: package com.commonsware.android.strings; import android.app.Activity; import android.os.Bundle; import android.text.TextUtils; import android.text.Html; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; public class StringsDemo extends Activity { EditText name; TextView result; 263 Subscribe to updates at http://commonsware.com Special Creative Commons BY-SA 3.0 License Edition
@Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); Working with Resources name=(EditText)findViewById(R.id.name); result=(TextView)findViewById(R.id.result); Button btn=(Button)findViewById(R.id.format); btn.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { applyFormat(); } }); } private void applyFormat() { String format=getString(R.string.funky_format); String simpleResult=String.format(format, TextUtils.htmlEncode(name.getText().toString())); result.setText(Html.fromHtml(simpleResult)); } } The string resource manipulation can be found in applyFormat(), which is called when the button is clicked. First, we get our format via getString() – something we could have done at onCreate() time for efficiency. Next, we format the value in the field using this format, getting a String back, since the string resource is in entity-encoded HTML. Note the use of TextUtils.htmlEncode() to entity-encode the entered name, in case somebody decides to use an ampersand or something. Finally, we convert the simple HTML into a styled text object via Html.fromHtml() and update our label. When the activity is first launched, we have an empty label: 264 Subscribe to updates at http://commonsware.com Special Creative Commons BY-SA 3.0 License Edition
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The Busy Coder's Guide to Android D
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The Busy Coder's Guide to Android D
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GPS................................
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Using Selection Widgets............
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Embedding the WebKit Browser.......
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Styled Text........................
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query()............................
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You Make the Call!.................
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Handling API Changes...............
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your operating system does not supp
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The book does not cover in any deta
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• Places where you think we could
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Subscribe to updates at http://comm
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The Big Picture • Keyboards, if t
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Content Providers The Big Picture C
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Projects and Targets To test your a
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Projects and Targets • libs/, whi
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Projects and Targets You also indic
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Projects and Targets In the preced
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Projects and Targets ... At the
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Projects and Targets You can create
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Projects and Targets • Only ask f
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Creating a Skeleton Application For
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Creating a Skeleton Application The
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Creating a Skeleton Application Fig
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Using XML-Based Layouts Android's S
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Using XML-Based Layouts Since this
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} public void onClick(View view) {
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Employing Basic Widgets • android
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Employing Basic Widgets Each widget
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Employing Basic Widgets For this pr
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Employing Basic Widgets The corresp
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Turn the Radio Up Employing Basic W
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It's Quite a View Employing Basic W
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Thinking Linearly Working with Cont
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Working with Containers • Set all
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Example Working with Containers Let
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} } } Working with Containers case
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Working with Containers If we toggl
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Working with Containers Positions R
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Working with Containers android:lay
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Working with Containers first in th
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Putting Cells in Rows Working with
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Working with Containers You can als
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Working with Containers
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Working with Containers the remaini
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Using Selection Widgets listbox. Th
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Using Selection Widgets android:lay
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Using Selection Widgets Then, rathe
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Using Selection Widgets the setDrop
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Using Selection Widgets Figure 24.
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Using Selection Widgets For example
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Using Selection Widgets TextView, w
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Using Selection Widgets something n
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Using Selection Widgets Figure 28.
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Using Selection Widgets • android
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Getting Fancy With Lists For exampl
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Getting Fancy With Lists A Dynamic
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Getting Fancy With Lists In the sam
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And you want happy users, right? Ge
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Using the Holder Pattern Getting Fa
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Getting Fancy With Lists super.onCr
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} Getting Fancy With Lists public v
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Getting Fancy With Lists So, let's
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Getting Fancy With Lists 1. While w
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Getting Fancy With Lists Figure 33.
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Getting Fancy With Lists So if we w
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Getting Fancy With Lists layout.set
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Getting Fancy With Lists public Rat
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Getting Fancy With Lists Details of
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Employing Fancy Widgets and Contain
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The Input Method Framework Of cours
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The Input Method Framework H
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The Input Method Framework Numbers
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The Input Method Framework android:
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The Input Method Framework Figure 5
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Applying Menus will appear, showing
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Applying Menus appropriate behavior
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Applying Menus @Override public voi
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Applying Menus Figure 56. The MenuD
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Applying Menus Figure 59. The same
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Applying Menus • You must
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Applying Menus In the layout XML sh
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Fonts 178 Subscribe
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The results? Fonts Figure 61. The F
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Fonts And, of course, Android's int
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android:layout_width="fill_parent"
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Embedding the WebKit Browser on the
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Embedding the WebKit Browser • go
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Running this activity gives us: Emb
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Showing Pop-Up Messages from the cu
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Showing Pop-Up Messages android:lay
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Showing Pop-Up Messages Figure 66.
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Dealing with Threads - merely creat
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Dealing with Threads super.onCreate
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Runnables Dealing with Threads If y
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Dealing with Threads AsyncTask, Gen
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import android.widget.ArrayAdapter;
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Dealing with Threads Since we elect
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Accessing Files application package
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} } Accessing Files .makeText(this,
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android:text="Close" /> Accessing
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Accessing Files openFileInput() to
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Leveraging Java Libraries • Size:
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android:layout_height="wrap_content
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Leveraging Java Libraries Figure 96
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Reviewing the Script Leveraging Jav
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Communicating via the Internet styl
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Communicating via the Internet We h
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Communicating via the Internet for
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Pieces of Me Using a Content Provid
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Using a Content Provider This metho
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Using a Content Provider • The pr
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Using a Content Provider To delete
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First, Some Dissection Building a C
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onCreate() Building a Content Provi
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Building a Content Provider } else
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Building a Content Provider WHERE c
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getType() Building a Content Provid
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Building a Content Provider
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Mother, May I? Requesting and Requi
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Requesting and Requiring Permission
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Requesting and Requiring Permission
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Service with Class Creating a Servi
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Creating a Service immune to garbag
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Creating a Service For example, the
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Creating a Service @Override protec
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The Ties That Bind Invoking a Servi
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Invoking a Service private void upd
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Alerting Users Via Notifications In
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import android.app.Activity; import
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Alerting Users Via Notifications 4.
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Accessing Location-Based Services L
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Accessing Location-Based Services
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Accessing Location-Based Services
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Mapping with MapView and MapActivit
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Rugged Terrain Mapping with MapView
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Handling Telephone Calls Report To
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Handling Telephone Calls The activi
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Development Tools Figure 105. ReadW
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Development Tools Figure 107. Hiera
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Development Tools Figure 109. Hiera
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Development Tools What may not be i
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Logging Development Tools Figure 11
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Development Tools Figure 114. DDMS
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Development Tools Figure 116. DDMS
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Development Tools Figure 118. Simul
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Put It On My Card Development Tools
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Taking the Default Handling Multipl
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Handling Multiple Screen Sizes •
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Handling Multiple Screen Sizes Thes
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Density-Based Sets Handling Multipl
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Handling Multiple Screen Sizes •
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Handling Multiple Screen Sizes size
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Handling Multiple Screen Sizes Repl
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Handling Multiple Screen Sizes scal
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Handling Multiple Screen Sizes R.st
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Handling Multiple Screen Sizes Figu
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Handling Multiple Screen Sizes />
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Handling Multiple Screen Sizes Now
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super.onCreate(savedInstanceState);
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Handling Multiple Screen Sizes In s
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Dealing With Devices Fortunately, s
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Dealing With Devices Market are tes
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Dealing With Devices The CLIQ also
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Not all devices will be this way. H
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The lessons to take from this: Hand
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Handling Platform Changes Note that
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Wrapping the API Handling Platform
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Handling Platform Changes } else {
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} } Handling Platform Changes publi
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You might also consider: Where Do W
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ContentManager.....................
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PreferenceCategory.................
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INTEGER............................
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getSpeed().........................
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setColumnShrinkable()..............
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android:paddingBottom..............
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