Android revision revision03 Copyright c Daikoku Manabu This tutorial is licensed under a Creative Commons Attribution

Transcription

1 Android revision03

2 Android revision revision03 Copyright c Daikoku Manabu This tutorial is licensed under a Creative Commons Attribution 2.1 Japan License.

3 3 1 Android Android Android Android Dalvik VM Android JDK Android SDK Eclipse ADT Eclipse LogCat Android Android XML

4 Java Java ID (1) (2) ID

5 (1) (2) (3) Android URI

6 Android Android

7 ID OpenGL ES OpenGL ES OpenGL ES OpenGL ES SQLite SQLite URI

8 HTTP URL HttpURLConnection HTTP HTTP SMTP SMTP

9 9 1 Android 1.1 Android Android Android Android (platform) Windows MacOS Linux Android Android Google Android Symbian Windows Mobile BREW Android Android Android (Android application) Android Android Java Android Java Android Java Java Java Dalvik VM Java (javac) Java (bytecode).class.class Java VM (Java Virtual Machine) Android Android Java VM Dalvik VM (Dalvik Virtual Machine) 1 Dalvik VM Android (Android bytecode) Android.dex Dalvik (Dalvik executable format file).dex (.dex file) 1 Dalvik VM Dan Bornstein Dalvík

10 10 1 Android Android Android Android Android Android.apk Android (Android package file).apk (.apk Android Android JDK(Java Development Kit) Android SDK Eclipse ADT(Android Development Tools) JDK JDK(Java Development Kit) Java Sun Microsystems JDK Android SDK Android SDK Android Android.class.dex Dalvik.apk Android Google Android SDK Eclipse Eclipse IDE Eclipse Foundation IDE (integrated development environment) Eclipse ADT ADT(Android Development Tools) Android Eclipse Google ADT Android SDK

11 1.3. Eclipse Eclipse Android Eclipse Eclipse (project) Android Eclipse [File] [New] [Android Project] New Android Project Project name Contents Build Target Properties Use default location Location Android Application name Android Package name Java namako example.org org.example.namako Create Activity Min SDK Version API Level Android 2.2 API Level 8 Project name Contents Build Target Application name sample Android x.x

12 12 1 Android Package name Create Activity Min SDK Version org.example.sample SampleActivity API Level Finish Eclipse sample Create Activity Android Hello World, Android Android Android Eclipse [Run] [Run] Run As Android Application OK Android Android Hello World, SampleActivity Eclipse (Package Explorer) Eclipse sample Sample.java sample/src/org.example.sample SampleActivity.java src org.example.sample org/example/sample src 1.3.4

13 1.3. Eclipse 13 (user interface) Android (widget) Android (text view) Android Hello World, Java XML (layout XML) XML XML XML Java setcontentview(r.layout.main); XML XML XML Java Hello World, SampleActivity Android XML Java TextView tv = new TextView(this); tv.settext("hello World, SampleActivity"); setcontentview(tv); SampleActivity.java SampleActivity.java package org.example.sample; import android.app.activity; import android.os.bundle; import android.widget.textview; public class SampleActivity extends Activity { /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); TextView tv = new TextView(this); tv.settext(" Android "); setcontentview(tv); Android Android

14 14 1 Android Android (log) Android android.util.log static int d(string tag, String msg) 1 (tag) Project name Application name Package name Create Activity log org.example.log LogActivity LogActivity.java LogActivity.java package org.example.log; import android.app.activity; import android.os.bundle; import android.util.log; public class LogActivity extends Activity { private static final String TAG = "LogActivity"; /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); Log.d(TAG, "I was created."); LogActivity I was created LogCat Eclipse LogCat Eclipse LogCat [Window] [Show View] [Other...] Show View Android LogCat OK

15 1.5. Android 15 LogCat Filter was I was created. 1.5 Android Android Android Android Android Eclipse Android Android Android Android Android Android Android Android adb install Android.apk Android.apk Sample.apk adb install Sample.apk Android Android Android Android Android adb shell pwd cd ls rm exit UNIX Android.apk rm Android.apk Android /data/app Android (component) Android AWT Swing 4 (activity) (service) (broadcast receiver)

16 16 2 (content provider) Activity Android Create Activity Activity Service BroadcastReceiver ContentProvider Android Eclipse Android AndroidManifest.xml Android AndroidManifest.xml Android (Android manifest) XML Android Android Android Android Create Activity Android Android Android

17 Android Android (resource) Android (resource file) XML PNG JPEG res/layout res/values res/drawable Eclipse Android Java R.java (resource index) Java Java R.java XML 1.3 Java Java XML XML XML (layout XML) Eclipse Android res/layout/main.xml XML Android (widget) Android Java new TextView tv = new TextView(this); XML TextView

18 android:layout_width android:layout_height fill_parent wrap_content android:text android:typeface Android sans serif monospace (serif) XML Project name Application name Package name Create Activity layout org.example.layout LayoutActivity res/layout/main.xml XML XML Layout main.xml XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <TextView

19 android:typeface="sans" android:text="i am a text view. (sans)" <TextView android:typeface="serif" android:text="i am a text view. (serif)" <TextView android:typeface="monospace" android:text="i am a text view. (monospace)" </LinearLayout> Android Java XML Eclipse Android res/values/strings.xml <?xml version="1.0" encoding="utf-8"?> <resources> </resources> resources XML string name <?xml version="1.0" encoding="utf-8"?> <resources> <string name="message"> </string> </resources> message XML TextView /

20 20 2 name string color dimen Project name Application name Package name Create Activity string org.example.string StringActivity string/res/values/strings.xml Resources strings.xml strings.xml string XML strings.xml <?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">hello World, StringActivity</string> <string name="app_name"> </string> <string name="message"> </string> </resources> XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <TextView android:text="@string/hello" <TextView android:text="@string/message" </LinearLayout>

21 Hello World, StringActivity Java Java Java R.. message R.string.message ID (resource ID) Android ID void settext(int resid) ID ID ID 2.1 R.java Java Java Java Project name Application name Package name Create Activity refer org.example.refer ReferActivity strings.xml string XML strings.xml <?xml version="1.0" encoding="utf-8"?> <resources> <string name="hello">hello World, ReferActivity</string> <string name="app_name"> </string> <string name="message"> </string> </resources> ReferActivity.java ReferActivity.java package org.example.refer; import android.app.activity; import android.os.bundle; import android.widget.textview; public class ReferActivity extends Activity {

22 22 2 /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); TextView tv = new TextView(this); tv.settext(r.string.message); setcontentview(tv); resources XML color name 16 ( # ) 4 #RGB #ARGB #RRGGBB #AARRGGBB A R G B <color name="hitode">#f00</color> hitode TextView android:textcolor android:background Project name Application name color

23 Package name Create Activity org.example.color ColorActivity res/values XML.xml res/values [New] [File] New File colors.xml Finish XML colors.xml <?xml version="1.0" encoding="utf-8"?> <resources> <color name="tcolor">#00f</color> <color name="bcolor">#fff</color> </resources> XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <TextView android:text=" " </LinearLayout> resources XML dimen name 10 6 mm in pt (millimeter) (inch) (point)

24 24 2 px dp sp (pixel) (resolution) (density-independent pixel) 160dpi (scale-independent pixel) <dimen name="umiushi">16sp</dimen> 16sp umiushi TextView android:textsize Project name Application name Package name Create Activity dimen org.example.dimen DimenActivity res/values XML.xml res/values dimens.xml XML dimens.xml <?xml version="1.0" encoding="utf-8"?> <resources> <dimen name="tsize">64sp</dimen> </resources> XML

25 25 XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <TextView android:text=" " </LinearLayout> (user interface) Android XML Java Java XML XML <TextView android:id="@+id/namako" android:text=" namako " namako ID Java XML ID Java

26 26 3 R.id. ID R.id.namako namako ID Java View findviewbyid(int id) ID ID android.view.view android.widget.textview final TextView tv = (TextView) findviewbyid(r.id.textview); textview ID tv void settext(charsequence text) void settext(int resid) ID tv tv.settext(" "); (button) XML Button <Button android:id="@+id/dosomething" android:layout_width="wrap_content" android:text=" " Button

27 (event) (event listener) android.view.view.onclicklistener void onclick(view v) public void onclick(view v) { final TextView tv = (TextView) findviewbyid(r.id.textview); tv.settext(" "); onclick textview ID findviewbyid onclick void setonclicklistener(onclicklistener l) Android 1 Project name Application name Package name Create Activity increase org.example.increase IncreaseActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <TextView android:id="@+id/number"

28 28 3 android:text="0" <Button android:id="@+id/increase" android:layout_width="wrap_content" android:text=" " </LinearLayout> IncreaseActivity.java IncreaseActivity.java package org.example.increase; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.textview; import android.widget.button; public class IncreaseActivity extends Activity { private int n = 0; /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); final Button increase = (Button) findviewbyid(r.id.increase); increase.setonclicklistener(new OnClickListener() { public void onclick(view v) { increasenumber(); ); private void increasenumber() { final TextView number = (TextView) findviewbyid(r.id.number); number.settext(integer.tostring(++n)); (edit text) XML EditText android:scrollbars android:gravity vertical top

29 android:singleline android:numeric android:maxlength true 1 decimal void settext(charsequence text) void settext(int resid) Editable gettext() String String String tostring() (1) Android Project name Application name Package name Create Activity edittext org.example.edittext EditTextActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <EditText android:id="@+id/edittext1" android:layout_height="140sp" android:scrollbars="vertical" android:gravity="top" <Button android:id="@+id/forward" android:layout_width="wrap_content" android:text=" " <EditText android:id="@+id/edittext2" android:layout_height="140sp" android:scrollbars="vertical" android:gravity="top" </LinearLayout> EditTextActivity.java

30 30 3 EditTextActivity.java package org.example.edittext; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.edittext; import android.widget.button; public class EditTextActivity extends Activity { /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); final Button forward = (Button) findviewbyid(r.id.forward); forward.setonclicklistener(new OnClickListener() { public void onclick(view v) { forwardtext(); ); private void forwardtext() { final EditText edittext1 = (EditText) findviewbyid(r.id.edittext1); final EditText edittext2 = (EditText) findviewbyid(r.id.edittext2); edittext2.settext(edittext1.gettext().tostring()); (2) Android 10 1 Project name Application name Package name Create Activity sqrt org.example.sqrt SqrtActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <EditText android:id="@+id/number" android:singleline="true" android:numeric="decimal"

31 <Button android:layout_width="wrap_content" android:text=" " <TextView </LinearLayout> SqrtActivity.java SqrtActivity.java package org.example.sqrt; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.edittext; import android.widget.button; import android.widget.textview; public class SqrtActivity extends Activity { /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); final Button sqrt = (Button) findviewbyid(r.id.sqrt); sqrt.setonclicklistener(new OnClickListener() { public void onclick(view v) { showsqrt(); ); private void showsqrt() { final EditText number = (EditText) findviewbyid(r.id.number); double a = Double.parseDouble(number.getText().toString()); final TextView result = (TextView) findviewbyid(r.id.result); result.settext(a + " " + Math.sqrt(a) + " "); (check box) XML CheckBox <CheckBox android:id="@+id/luxury" android:layout_width="wrap_content" android:text=" " CheckBox

32 boolean ischecked() Android Project name Application name Package name Create Activity length org.example.length LengthActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <EditText android:id="@+id/edittext" android:singleline="true" <CheckBox android:id="@+id/except" android:layout_width="wrap_content" android:text=" " <Button android:id="@+id/length" android:layout_width="wrap_content" android:text=" " <TextView android:id="@+id/result" </LinearLayout> LengthActivity.java LengthActivity.java package org.example.length; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.edittext; import android.widget.checkbox; import android.widget.button; import android.widget.textview;

33 public class LengthActivity extends Activity { /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); final Button length = (Button) findviewbyid(r.id.length); length.setonclicklistener(new OnClickListener() { public void onclick(view v) { lengthofstring(); ); private void lengthofstring() { final EditText edittext = (EditText) findviewbyid(r.id.edittext); final String s = edittext.gettext().tostring(); final CheckBox except = (CheckBox) findviewbyid(r.id.except); final TextView result = (TextView) findviewbyid(r.id.result); if (except.ischecked()) result.settext(integer.tostring(lengthexceptspace(s))); else result.settext(integer.tostring(s.length())); private int lengthexceptspace(string s) { int len = 0; for (int i=0; i<s.length(); i++) if (s.charat(i)!= ) len++; return len; (radio button) XML RadioButton <RadioButton android:id="@+id/underground" android:layout_width="wrap_content" android:text=" " RadioButton Android (radio group)

34 XML RadioGroup RadioGroup android:orientation horizontal vertical <RadioGroup android:id="@+id/emptygroup" android:layout_width="wrap_content" android:orientation="vertical" > </RadioGroup> RadioGroup RadioGroup RadioButton void check(int id) ID group group.check(r.id.underground) underground ID ID int getcheckedradiobuttonid() ID Android Project name Application name Package name Create Activity greet org.example.greet GreetActivity

35 XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <RadioGroup android:layout_width="wrap_content" android:orientation="vertical" > <RadioButton android:layout_width="wrap_content" android:text=" " <RadioButton android:layout_width="wrap_content" android:text=" " <RadioButton android:layout_width="wrap_content" android:text=" " </RadioGroup> <Button android:layout_width="wrap_content" android:text=" " <TextView </LinearLayout> GreetActivity.java GreetActivity.java package org.example.greet; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.radiogroup; import android.widget.button; import android.widget.textview; public class GreetActivity extends Activity { /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); final RadioGroup time = (RadioGroup) findviewbyid(r.id.time); time.check(r.id.morning); final Button greet = (Button) findviewbyid(r.id.greet); greet.setonclicklistener(new OnClickListener() { public void onclick(view v) { setgreet();

36 36 3 ); private void setgreet() { final RadioGroup time = (RadioGroup) findviewbyid(r.id.time); final TextView result = (TextView) findviewbyid(r.id.result); switch (time.getcheckedradiobuttonid()) { case R.id.morning: result.settext(" "); break; case R.id.afternoon: result.settext(" "); break; case R.id.night: result.settext(" "); break; Android (list view) android.widget.listview String tostring() (adapter) android.widget.baseadapter android.widget.arrayadapter ArrayAdapter 1 Person ArrayAdapter<Person> adapter = new ArrayAdapter<Person>(this, android.r.layout.simple_list_item_1);

37 Person simple_list_item_1 add Person adapter.add(new Person(" ")); Person void setadapter(listadapter adapter) android.widget.adapterview.onitemclicklistener void onitemclick(adapterview<?> parent, View view, int position, long id) onitemclick onitemclick ListAdapter getadapter() Object getitem(int position) Project name Application name Package name Create Activity listview org.example.listview ListViewActivity

38 38 3 main.xml XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <ListView android:id="@+id/listview" <TextView android:id="@+id/selecteditem" </LinearLayout> ListViewActivity.java ListViewActivity.java package org.example.listview; import android.app.activity; import android.os.bundle; import android.view.view; import android.widget.arrayadapter; import android.widget.listview; import android.widget.adapterview; import android.widget.textview; public class ListViewActivity extends Activity { /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); ArrayAdapter<Dish> adapter = new ArrayAdapter<Dish>(this, android.r.layout.simple_list_item_1); adapter.add(new Dish(" ", 480)); adapter.add(new Dish(" ", 540)); adapter.add(new Dish(" ", 460)); adapter.add(new Dish(" ", 520)); final ListView listview = (ListView) findviewbyid(r.id.listview); listview.setadapter(adapter); listview.setonitemclicklistener( new AdapterView.OnItemClickListener() { public void onitemclick(adapterview<?> parent, View view, int position, long id) { setselecteditem(parent, position); ); private void setselecteditem(adapterview<?> parent, int position) { Dish dish = (Dish) parent.getadapter().getitem(position); final TextView selecteditem = (TextView) findviewbyid(r.id.selecteditem); selecteditem.settext( " = " + dish.getname() + "\n" + " = " + dish.getprice() + " ");

39 class Dish { String name; int price; Dish(String aname, int aprice) { name = aname; price = aprice; public String tostring() { return name + " " + price + " "; public String getname() { return name; public int getprice() { return price; Android (spinner) android.widget.spinner (drop-down list) [ ] String tostring() ArrayAdapter<Person> adapter = new ArrayAdapter<Person>(this, android.r.layout.simple_spinner_item); Person simple_spinner_item

40 40 3 void setdropdownviewresource(int resource) adapter.setdropdownviewresource( android.r.layout.simple_spinner_dropdown_item); simple_spinner_dropdown_item android.widget.adapterview.onitemselectedlistener void onitemselected(adapterview<?> parent, View view, int position, long id) void onnothingselected(adapterview<?> parent) onitemselected 3.6 onitemclick void setselection(int position) Project name Application name Package name Create Activity spinner org.example.spinner SpinnerActivity main.xml XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="

41 android:orientation="vertical" android:layout_height="fill_parent" > <Spinner <TextView </LinearLayout> SpinnerActivity.java SpinnerActivity.java package org.example.spinner; import android.app.activity; import android.os.bundle; import android.view.view; import android.widget.arrayadapter; import android.widget.spinner; import android.widget.adapterview; import android.widget.textview; public class SpinnerActivity extends Activity { /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); ArrayAdapter<Man> adapter = new ArrayAdapter<Man>(this, android.r.layout.simple_spinner_item); adapter.setdropdownviewresource( android.r.layout.simple_spinner_dropdown_item); adapter.add(new Man(" ", 526)); adapter.add(new Man(" ", 876)); adapter.add(new Man(" ", 1200)); adapter.add(new Man(" ", 361)); final Spinner spinner = (Spinner) findviewbyid(r.id.spinner); spinner.setadapter(adapter); spinner.setselection(2); spinner.setonitemselectedlistener( new AdapterView.OnItemSelectedListener() { public void onitemselected(adapterview<?> parent, View view, int position, long id) { setselecteditem(parent, position); public void onnothingselected(adapterview<?> parent) { ); private void setselecteditem(adapterview<?> parent, int position) { Man man = (Man) parent.getadapter().getitem(position); final TextView selecteditem = (TextView) findviewbyid(r.id.selecteditem); selecteditem.settext( " = " + man.getname() + "\n" + " = " + man.getincome() + " ");

42 42 3 class Man { String name; int income; Man(String aname, int aincome) { name = aname; income = aincome; public String tostring() { return name + " " + income + " "; public String getname() { return name; public int getincome() { return income; Android (layout) (linear layout) (table (absolute layout) XML android:layout_width android:layout_height fill_parent wrap_content

43 XML LinearLayout LinearLayout android:orientation horizontal vertical Project name Application name Package name Create Activity linear org.example.linear LinearActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <Button android:layout_width="wrap_content" android:text=" 1" <LinearLayout > <Button android:layout_width="wrap_content" android:text=" 2" <Button android:layout_width="wrap_content" android:text=" 3" </LinearLayout> <Button android:layout_width="wrap_content" android:text=" 4" </LinearLayout> 2 3

44 (row) (column) TableRow XML android:layout_width android:layout_height TableLayout TableRow TableRow TableLayout android:stretchcolumns Project name Application name Package name Create Activity table org.example.table TableActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <TableLayout xmlns:android=" android:layout_height="fill_parent" android:stretchcolumns="1" > <TableRow> <Button android:text=" 1" <Button android:text=" 2" <Button android:text=" 3" </TableRow> <TableRow> <Button android:text=" 4" <Button android:text=" 5" <Button android:text=" 6" </TableRow> </TableLayout>

45 x y AbsoluteLayout AbsoluteLayout android:layout_x android:layout_y x y Project name Application name Package name Create Activity absolute org.example.absolute AbsoluteActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <AbsoluteLayout xmlns:android=" android:layout_height="fill_parent" > <Button android:layout_width="wrap_content" android:layout_x="0px" android:layout_y="0px" android:text=" 1" <Button android:layout_width="wrap_content" android:layout_x="150px" android:layout_y="60px" android:text=" 2" <Button android:layout_width="wrap_content" android:layout_x="100px" android:layout_y="200px" android:text=" 3" </AbsoluteLayout> Android (toast) android.widget.toast static Toast maketext(context context, CharSequence text, int duration) 1 this 2

46 Toast LENGTH_LONG LENGTH_SHORT show Project name Application name Package name Create Activity toast org.example.toast ToastActivity main.xml XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <Button android:id="@+id/showtoast" android:layout_width="wrap_content" android:text=" " </LinearLayout> ToastActivity.java ToastActivity.java package org.example.toast; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.button; import android.widget.toast; public class ToastActivity extends Activity { private Toast toast; /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); toast = Toast.makeText(this, " ", Toast.LENGTH_SHORT); final Button showtoast = (Button) findviewbyid(r.id.showtoast); showtoast.setonclicklistener(new OnClickListener() { public void onclick(view v) { toast.show(); );

47 GUI (dialog) Android android.app.dialog Android android.app.alertdialog.builder (alert dialog) (positive button) (neutral button) (negative button) AlertDialog.Builder new this settitle setmessage setpositivebutton setneutralbutton setnegativebutton show setpositivebutton setneutralbutton setnegativebutton null new AlertDialog.Builder(this).setTitle(" ").setmessage(" ").setpositivebutton(" ", null)

48 48 3.show() (1) Project name Application name Package name Create Activity alert org.example.alert AlertActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <Button android:layout_width="wrap_content" android:text=" " </LinearLayout> AlertActivity.java AlertActivity.java package org.example.alert; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.button; import android.app.alertdialog; public class AlertActivity extends Activity { /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); final Button alert = (Button) findviewbyid(r.id.alert); alert.setonclicklistener(new OnClickListener() { public void onclick(view v) { showalertdialog(); ); private void showalertdialog() { new AlertDialog.Builder(this).setTitle(" ").setmessage(" ").setpositivebutton(" ", null).show();

49 android.content.dialoginterface.onclicklistener void onclick(dialoginterface dialog, int which) (2) Project name Application name Package name Create Activity banana org.example.banana BananaActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <Button android:layout_width="wrap_content" android:text=" " <TextView </LinearLayout> BananaActivity.java BananaActivity.java package org.example.banana; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.button; import android.app.alertdialog; import android.content.dialoginterface; import android.widget.textview; public class BananaActivity extends Activity { /** Called when the activity is first created. */

50 50 3 public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); final Button banana = (Button) findviewbyid(r.id.banana); banana.setonclicklistener(new OnClickListener() { public void onclick(view v) { bananaresearch(); ); private void bananaresearch() { new AlertDialog.Builder(this).setTitle(" ").setmessage(" ").setpositivebutton(" ", new DialogInterface.OnClickListener() { public void onclick(dialoginterface dialog, int which) { setfaction(" "); ).setneutralbutton(" ", new DialogInterface.OnClickListener() { public void onclick(dialoginterface dialog, int which) { setfaction(" "); ).setnegativebutton(" ", new DialogInterface.OnClickListener() { public void onclick(dialoginterface dialog, ).show(); int which) { setfaction(" "); private void setfaction(string faction) { final TextView selectedfaction = (TextView) findviewbyid(r.id.selectedfaction); selectedfaction.settext( " " + faction + " "); AlertDialog.Builder setitems setitems 2 1 2

51 onclick 2 setitems (3) Project name Application name Package name Create Activity listalert org.example.listalert ListAlertActivity XML XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <Button android:id="@+id/tour" android:layout_width="wrap_content" android:text=" " <TextView android:id="@+id/selecteddestination" </LinearLayout> ListAlertActivity.java ListAlertActivity.java package org.example.listalert; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.button; import android.app.alertdialog; import android.content.dialoginterface; import android.widget.textview; public class ListAlertActivity extends Activity { private static final String[] items = new String[] { " ", " ", " ", " " ; /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); final Button tour = (Button) findviewbyid(r.id.tour); tour.setonclicklistener(new OnClickListener() { public void onclick(view v) { tourresearch(); );

52 52 3 private void tourresearch() { new AlertDialog.Builder(this).setTitle(" ").setitems(items, new DialogInterface.OnClickListener() { public void onclick(dialoginterface dialog, int which) { setdestination(which); ).show(); private void setdestination(int which) { final TextView selecteddestination = (TextView) findviewbyid(r.id.selecteddestination); selecteddestination.settext( " " + items[which] + " "); Android (menu button) MENU Android Menu Activity boolean oncreateoptionsmenu(menu menu) MenuItem add(int groupid, int itemid, int order, CharSequence title) 1 1 ID 2 ID 3 4 ID Menu NONE menu menu.add(2, 7, Menu.NONE, " "); ID 2 ID 7

53 add MenuItem MenuItem setshortcut(char numericchar, char alphachar) Activity boolean onoptionsitemselected(menuitem item) ID ID int getgroupid() int getitemid() CharSequence gettitle() Project name Application name Package name Create Activity menu org.example.menu MenuActivity MenuActivity.java MenuActivity.java package org.example.menu; import android.app.activity; import android.os.bundle; import android.view.menu; import android.view.menuitem; import android.app.alertdialog; public class MenuActivity extends Activity { private static final int WASHOKU = 0; private static final int KATSUDON = 0; private static final int SUKIYAKI = 1; private static final int UDON = 2; private static final int NIKUJAGA = 3; /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) {

54 54 3 super.oncreate(savedinstancestate); setcontentview(r.layout.main); public boolean oncreateoptionsmenu(menu menu) { super.oncreateoptionsmenu(menu); menu.add(washoku, KATSUDON, Menu.NONE, " ").setshortcut( 0, k ); menu.add(washoku, SUKIYAKI, Menu.NONE, " ").setshortcut( 1, s ); menu.add(washoku, UDON, Menu.NONE, " ").setshortcut( 2, u ); menu.add(washoku, NIKUJAGA, Menu.NONE, " ").setshortcut( 3, n ); return true; public boolean onoptionsitemselected(menuitem item) { switch (item.getgroupid()) { case WASHOKU: String itemid = Integer.toString(item.getItemId()); String title = item.gettitle().tostring(); showalertdialog(" ID = " + itemid + "\n" + " = " + title); return true; return super.onoptionsitemselected(item); private void showalertdialog(string message) { new AlertDialog.Builder(this).setTitle(" ").setmessage(message).setpositivebutton(" ", null).show(); Android (image view) Android 4 Windows bitmap (BMP) JPEG PNG GIF PNG Android res/drawable-hdpi res/drawable-mdpi res/drawable-ldpi (bitmap image)

55 ImageView XML ImageView android:src Project name Application name Package name Create Activity imageview org.example.imageview ImageViewActivity res/drawable-hdpi res/drawable-mdpi res/drawable-ldpi sample.xxx png jpg gif main.xml XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <ImageView android:layout_width="wrap_content" </LinearLayout> sample.xxx (intent) intent Android 4 3 3

56 Intent Intent Intent(Context packagecontext, Class<?> cls) 1 this 2 new Intent(this, SecondActivity.class) SecondActivity Android Android Android Android void startactivityforresult(intent intent, int requestcode) 1 2 (request code) Android Android Android <manifest> <application> </application> </manifest> application activity SecondActivity <activity android:name=".secondactivity" android:label="@string/app_name" Android Android Project name Application name Package name Create Activity intent org.example.intent IntentActivity

57 main.xml XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <Button android:layout_width="wrap_content" android:text=" " </LinearLayout> XML res/layout [New] [File] second.xml [Finish] second.xml XML XML second.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <TextView android:text=" " </LinearLayout> src/org.example.intent [New] [Class] Name Superclass SecondActivity android.app.activity [Finish] SecondActivity.java SecondActivity.java package org.example.intent; import android.app.activity; import android.os.bundle; public class SecondActivity extends Activity { public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate);

58 58 4 setcontentview(r.layout.second); IntentActivity.java IntentActivity.java package org.example.intent; import android.app.activity; import android.os.bundle; import android.view.view; import android.view.view.onclicklistener; import android.widget.button; import android.content.intent; public class IntentActivity extends Activity { /** Called when the activity is first created. */ public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); final Button tosecond = (Button) findviewbyid(r.id.tosecond); tosecond.setonclicklistener(new OnClickListener() { public void onclick(view v) { startsecondactivity(); ); private void startsecondactivity() { Intent i = new Intent(this, SecondActivity.class); startactivityforresult(i, 0); Android application <activity android:name=".secondactivity" android:label="@string/app_name" Android AndroidManifest.xml Android [ ] Android [ ] putextra (extended data) org.example.namako

59 org.example.namako.umiushi putextra Intent getintent() Bundle 2 Bundle getextras() null boolean getboolean(string key) int getint(string key) String getstring(string key) boolean[] getbooleanarray(string key) int[] getintarray(string key) String[] getstringarray(string key) Project name Application name Package name Create Activity putextra org.example.putextra PutExtraActivity main.xml XML main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical"

60 60 4 android:layout_height="fill_parent" > <EditText android:id="@+id/edittext1" <EditText android:id="@+id/edittext2" <EditText android:id="@+id/edittext3" <Button android:id="@+id/tosecond" android:layout_width="wrap_content" android:text=" " </LinearLayout> res/layout second.xml XML XML second.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=" android:orientation="vertical" android:layout_height="fill_parent" > <TextView android:id="@+id/textview1" <TextView android:id="@+id/textview2" <TextView android:id="@+id/textview3" </LinearLayout> Activity SecondActivity SecondActivity.java SecondActivity.java package org.example.putextra; import android.app.activity; import android.os.bundle; import android.widget.textview; public class SecondActivity extends Activity { public void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.second); final TextView textview1 = (TextView) findviewbyid(r.id.textview1); final TextView textview2 = (TextView) findviewbyid(r.id.textview2); final TextView textview3 = (TextView) findviewbyid(r.id.textview3); Bundle extras = getintent().getextras(); if (extras!= null) {