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"OESPJEɾJ04
ΞϓϦ࡞ೖ
,.$OPOZMFOF
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͜ͷεϥΠυʹ͍ͭͯ
w य़߹॓ͷεϥΠυ
w य़߹॓ͰJ04ฤͷΈΛൃදʢͪ͜Βʣ
w ͜͜ʹ"OESPJEฤΛऩ
w J04ฤͱҰ෦ॏෳ͍ͯ͠·͢
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ࣗݾհ
w OPOZMFOF ͷʹΕΜ
w ,.$ೋճੜSPPU
w (JU)VCIBUFOBFUDʜ
w QZUIPO
KBWB "OESPJE
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͢͜ͱ
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"OESPJEͱJ04ͷجຊ
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"OESPJEͱJ04
Ͱ
ಉػೳͷΞϓϦΛ࡞
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࡞͢ΔΞϓϦ
w 4UBDL0WFSqPX"1*
w ΈΜͳେ͖ɺϓϩάϥϛϯάͷ2"αΠτ
w QVCMJD"1*Ͱݕࡧৄࡉ͕औΕΔ
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4UBDL0WFSqPX"1*
w υΩϡϝϯτ
w IUUQTBQJTUBDLFYDIBOHFDPNEPDT
w TFBSDI"1* ྫλΠτϧʹBOESPJE
w IUUQTBQJTUBDLFYDIBOHFDPNTFBSDI
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4UBDLFS
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"OESPJE
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࣍
w "OESPJEͱʁ
w ηοτΞοϓ
w )FMMP8PSMEΛோΊΔ
w ΞϓϦ࡞
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"OESPJEͱ
w (PPHMFͷ04
w -JOVYΧʔωϧΛ༻
w ༷ʑͳϝʔΧʔ
w ຊʹ͓͚ΔγΣΞ
w ࠷৽ NBSTINBMMPX
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։ൃڥ
w +BWB
w ਖ਼֬ʹ"OESPJE+BWB
ͱݴΘΕɺڍಈ͕ҧͬͨΓ͢Δ
w ਖ਼نදݱFUD
w "OESPJE/͔Β0QFO+%,KBWB
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։ൃڥ
w "OESPJE4UVEJP
w *OUFMMJ+ϕʔε
w 8JOEPXTNBD-JOVY
w ແྉ
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ηοτΞοϓ
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໊শઃఆ
w ࠓճ4UBDLFS
w OFUOPOZMFOFTUBDLFS
w ͜Ε͕ΞϓϦͷ*%ʹ
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04όʔδϣϯ
w ݹ͍όʔδϣϯ͕ଟ͘ଘࡏ
w ࠷৽ͷ"1*͕͑ͳ͍
w Ҏ্ఔ͕Φεεϝ
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"DUJWJUZ࡞
w &NQUZ"DUJWJUZΛબ
ʢ#BTJDͪΐͬͱ"EWBODFE͗͢Δʣ
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)FMMP8PSME
w Λଓɺ্ʹ͋Δl⾣z
Λԡͯ͠ΞϓϦΛىಈ
w ΤϛϡϨʔλͰՄ
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)FMMP8PSMEΛோΊΔ
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.BJO"DUJWJUZKBWB
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
ˣޙͰઆ໌
ˢϨΠΞτΛදࣔ
w ը໘੍ޚ
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BDUJWJUZ@NBJOYNMʢൈਮʣ
w ϨΠΞτ
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CVJMEHSBEF ൈਮ
android {
defaultConfig {
applicationId "net.nonylene.stacker"
minSdkVersion 19
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
}
dependencies {
compile 'com.android.support:appcompat-v7:23.2.0'
}
ˡόʔδϣϯใͳͲ
ˢ֎෦ϥΠϒϥϦ 4VQQPSU-JCSBSZ
w Ϗϧυઃఆ HSPPWZ
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"OESPJE.BOJGFTUYNMʢൈਮʣ
w ΞϓϦͷใ͕ॻ͔ΕͨϑΝΠϧ
ˡΞϓϦ໊ɺΞΠίϯ
ˢ"DUJWJUZͷใ
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ΞϓϦ࡞
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ϑϩʔΛߟ͑Δ
ᶃݕࡧϫʔυΛೖྗͤ͞Δ
ᶅ"1*Λୟ͍ͯ݁ՌΛऔಘ
ᶅ+40/Λॲཧ
ᶆॲཧͨ݁͠ՌΛදࣔ͢Δ
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ᶃݕࡧϫʔυΛೖྗ
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ϨΠΞτ࡞
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ը໘ΛΈཱͯΔ
w ը໘ύʔπͷ͜ͱΛViewͱ͍͏
w "OESPJEͰը໘ύʔπYNMͰද͞ΕΔ
w ೖྗཝͱϦετදࣔͷύʔπΛ্ԼʹฒΔ
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BDUJWJUZNBJOYNMʢൈਮʣ
ɾ-JOFBS-BZPVU
&EJU5FYU
#VUUPO
3FDZDMFS7JFX
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-JOFBS-BZPVU
w ෳͷViewΛ্ԼPSࠨӈʹฒΔׂΛ࣋ͭ
• layout_width=“match_parent”
layout_height=“match_parent”
ɹɹॎԣ͍ͬͺ͍ʹ͛Δ
• orientation="vertical"
ɹɹॎ͖ʹฒΔ
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&EJU5FYU
w จࣈೖྗ༻ͷView
• id="@+id/edit_text"
ɹɹϓϩάϥϜ͔Βࢀর͢ΔͨΊͷ*%
• hint=“Please input search"
ɹɹ༧Ίදࣔ͢Δώϯτ
• lines="1"
ɹɹҰߦදࣔ
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&EJU5FYU
• layout_width=“match_parent”
layout_height=“wrap_content”
ɹɹԣ෯͍ͬͺ͍ʹ͛Δ
ɹɹॎ෯σϑΥϧτͷߴ͞ʹ͢Δ
• ࣗͰߴ͞Λઃఆ͢Δ߹ dp Λ͏
• 1dp ʹΑͬͯ 2px ͩͬͨΓ 3px ͩͬͨΓ
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#VUUPO
w Ϙλϯͷ7JFX
• text=“Search!"
ɹɹϘλϯʹදࣔ͢ΔςΩετ
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w 4VQQPSU-JCSBSZʹೖ͍ͬͯΔ
w 4VQQPSU-JCSBSZͱɾɾɾʁ
3FDZDMFS7JFX
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w ৽͍͠04ͷػೳͷҰ෦Λݹ͍04Ͱ͑ΔΑ͏ʹ
͢ΔɺHPPHMFͷެࣜϥΠϒϥϦ
w ྫ.BUFSJBM%FTJHO
'SBHNFOU
FUD
w ઌ΄ͲͷAppCompatActivityͦͷҰͭ
w ࠷৽ͷσβΠϯͷҰ෦ػೳ͕ఏڙ͞ΕΔ
4VQQPSU-JCSBSZ
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w ଞʹ04ʹೖͬͯͳ͍ศརػೳΛఏڙ
w ྫ3FDZDMFS7JFX
1BMFUUF
4VQQPSU-JCSBSZ
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w ಉ͡ViewΛ܁Γฦ͠Ϧετදࣔ͢ΔView
w ৄ͘͠ޙͰઆ໌
3FDZDMFS7JFX
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w ϥΠϒϥϦͱͯ͠͞Ε͍ͯΔͷͰಋೖ
w CVJMEHSBEMF
3FDZDMFS7JFX
dependencies {
compile ‘com.android.support:appcompat-v7:23.2.0’
compile ‘com.android.support:recyclerview-v7:23.2.0'
}
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3FDZDMFS7JFX
w BDUJWJUZ@NBJOYNM
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࣮ػͰ֬ೝ
w Ϧετ෦ۭന
w ԿΛදࣔͤ͞Δ͔Λ·ܾͩ
Ί͍ͯͳ͍
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ΫϦοΫˠจࣈྻऔಘ
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ϑϩʔ
w Ϣʔβʔ͕ϘλϯΛԡ͢
ˠEditText͔ΒݕࡧΩʔϫʔυΛऔಘ
w ͦΕʹԠͯ͡(&53FRVFTUΛඈ͢ ᶄ
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7JFXΛ"DUJWJUZͰೝࣝ
• View View#findViewById(int id)
• YNMͰࢦఆͨ͠*%ͷ View Λऔಘ͢Δ
• ྫ: id=“@+id/view_id” ͱࢦఆ
→ View view =
findViewById(R.layout.view_id);
• R.layout.~~ YNMͰ*%Λࢦఆ͢Δͱ
ࣗಈతʹ࡞ΒΕΔɺ*%ͷू߹Ϋϥε
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Ωʔϫʔυऔಘ
• ಘΒΕͨ View Λ EditText ʹΩϟετ
→ EditText ͱͯ͠ϓϩάϥϜͰѻ͑Δ
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
EditText editText = (EditText)
findViewById(R.id.edit_text);
Button button = (Button) findViewById(R.id.button);
}
}
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ϘλϯͷΫϦοΫ
• View View#setOnClickListener
(OnClickListener listener)
• Click ͞Εͨ࣌ͷϦεφʔΛઃఆ
• ΫϦοΫ͞ΕΔ
→ Ϧεφʔʹ͋Δࢦఆͷ͕ؔݺΕΔ
• java7 ʹϥϜμࣜແ͍
→ ແ໊ΦϒδΣΫτΛ࡞͢Δ
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@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText editText = (EditText)
findViewById(R.id.edit_text);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String searchText =
editText.getText().toString();
}
});
}
• ΫϦοΫ͞ΕͨΒ OnClick ͕ݺΕɺ
ɹEditText ͔ΒΩʔϫʔυऔಘ͢Δ
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ᶄ"1*Ͱ+40/औಘ
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ωοτϫʔΫ
w ωοτϫʔΫΛඈ͢ʹݖݶ͕͍Δ
w ΞϓϦͷݖݶΠϯετʔϧ࣌ʹ֬ೝ͞ΕΔ
w "OESPJE͔ΒҰ෦ͷݖݶ͕ڐՄ੍ʹ
w "OESPJE.BOJGFTUYNMʹهड़
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ωοτϫʔΫݖݶͷՃ
w "OESPJE.BOJGFTUYNM
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ωοτϫʔΫ
w "OESPJEͷσϑΥϧτͰ%FGBVMU)UUQ$MJFOU
ͱ"TZOD5BTL -PBEFS
Λ͏
w গ͍͠͠ͷͰࠓճ0L)UUQΛ͏
w 4RVBSFࣾͷKBWB͚௨৴ϥΠϒϥϦ
w "OESPJE෦ͰΘΕ͍ͯΔ
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0L)UUQ
w build.gradleʹՃ
dependencies {
compile 'com.android.support:appcompat-v7:23.2.0'
compile ‘com.android.support:recyclerview-v7:23.2.0'
compile 'com.squareup.okhttp3:okhttp:3.2.0'
}
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ϦΫΤετΛ࡞
String encodedText = null;
try {
encodedText = URLEncoder.encode(text, "utf-8");
} catch (UnsupportedEncodingException ignore) {}
String url = "https://api.stackexchange.com/2.2/search?
order=desc&sort=activity&intitle=" + encodedText +
"&site=stackoverflow&filter=!-*f(6pnztD5P";
Request request = new Request.Builder()
.url(url)
.build();
w ϦΫΤετ͢Δ63-Λγϡοͱ࡞
ˡ0L)UUQʹ͢ϦΫΤετͷใ
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ϦΫΤετΛ͛Δ
w "OESPJEͰ6*ͷߋ৽ʹ͏εϨουҰͭ
w ͜ͷεϨουҎ֎Ͱ6*ؔΛ࿔ΔͱΤϥʔ
w ωοτϫʔΫͷϦΫΤετɺ6*εϨουͰߦͬ
͍͚ͯͳ͍
w ϦΫΤετʹ͕͔͔࣌ؒΔͱը໘͕ݻ·ΔͨΊ
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0L)UUQΛͬͨϦΫΤετ
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new OkHttpClient().newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override
public void onResponse(Call call, final Response response)
throws IOException {
final String body = response.body().string();
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, body,
Toast.LENGTH_LONG).show();
}
});
}
});
• enqueue ʹ Callback Λ͢ͱ
ผεϨουͰ Request ͞ΕΔ
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new OkHttpClient().newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override
public void onResponse(Call call, final Response response)
throws IOException {
final String body = response.body().string();
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, body,
Toast.LENGTH_LONG).show();
}
});
}
});
• runOnUiThread() ʹ Runnable Λ͢ͱ
6*εϨουͰ run() ͕࣮ߦ͞ΕΔ
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new OkHttpClient().newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
e.printStackTrace();
}
@Override
public void onResponse(Call call, final Response response)
throws IOException {
final String body = response.body().string();
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, body,
Toast.LENGTH_LONG).show();
}
});
}
});
• ड͚औͬͨ body Λͦͷ··τʔετʹग़͢
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࣮ػͰ֬ೝ
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ᶅ+40/Λॲཧ
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+40/Λύʔε
• JsonObject(String json)
• String Λύʔε͠ Json ͱͯ͠ѻ͏
• ྫ: String JsonObject#getString
(String name)
• json ͷ name ͱ͍͏߲ͷจࣈྻΛऔಘ
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• ฦ͖ͬͯͨ Response Λ
JsonObject ʹมɺͦͷதͷ “items” Λऔಘ
@Override
public void onResponse(Call call, final Response response) throws … {
final String body = response.body().string();
try {
JSONObject json = new JSONObject(body);
JSONArray questionsJson = json.getJSONArray("items");
} catch (JSONException ignore) {}
}
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σʔλอ࣋Ϋϥε
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σʔλอ࣋Ϋϥε
w ฦ͖ͬͯͨ+40/ΛಡΈࠐΈɺΫϥεʹ֨ೲ͢Δ
w σʔλΛѻ͍͘͢͢ΔͨΊ
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σʔλอ࣋Ϋϥε
• Question ΫϥεΛ࡞Δ
• Question.java Λ࡞
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public class Question {
public final boolean isAnswered;
public final String ownerName;
public final int upVoteCount;
public final Date creationDate;
public final String title;
public Question(JSONObject json) throws
ɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹJSONException {
isAnswered = ɹɹɹ
ɹɹɹɹɹɹɹjson.getBoolean(“is_answered");
upVoteCount =
ɹɹɹɹɹɹɹjson.getInt(“up_vote_count");
creationDate = new Date(
ɹɹɹɹɹɹɹjson.getInt("creation_date")
ɹɹɹɹɹɹɹ * 1000);
title = json.getString(“title");
JSONObject owner =
ɹɹɹɹɹɹɹjson.getJSONObject("owner");
ownerName =
ɹɹɹɹɹɹɹowner.getString("display_name");
}
}
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public class Question {
public final boolean isAnswered;
public final String ownerName;
public final int upVoteCount;
public final Date creationDate;
public final String title;
public Question(JSONObject json) throws
ɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹJSONException {
isAnswered = ɹɹɹ
ɹɹɹɹɹɹɹjson.getBoolean(“is_answered");
upVoteCount =
ɹɹɹɹɹɹɹjson.getInt(“up_vote_count");
creationDate = new Date(
ɹɹɹɹɹɹɹjson.getInt("creation_date")
ɹɹɹɹɹɹɹ * 1000);
title = json.getString(“title");
JSONObject owner =
ɹɹɹɹɹɹɹjson.getJSONObject("owner");
ownerName =
ɹɹɹɹɹɹɹowner.getString("display_name");
}
}
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public class Question {
public final boolean isAnswered;
public final String ownerName;
public final int upVoteCount;
public final Date creationDate;
public final String title;
public Question(JSONObject json) throws
ɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹJSONException {
isAnswered = ɹɹɹ
ɹɹɹɹɹɹɹjson.getBoolean(“is_answered");
upVoteCount =
ɹɹɹɹɹɹɹjson.getInt(“up_vote_count");
creationDate = new Date(
ɹɹɹɹɹɹɹjson.getInt("creation_date")
ɹɹɹɹɹɹɹ * 1000);
title = json.getString(“title");
JSONObject owner =
ɹɹɹɹɹɹɹjson.getJSONObject("owner");
ownerName =
ɹɹɹɹɹɹɹowner.getString("display_name");
}
}
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public class Question {
public final boolean isAnswered;
public final String ownerName;
public final int upVoteCount;
public final Date creationDate;
public final String title;
public Question(JSONObject json) throws
ɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹɹJSONException {
isAnswered = ɹɹɹ
ɹɹɹɹɹɹɹjson.getBoolean(“is_answered");
upVoteCount =
ɹɹɹɹɹɹɹjson.getInt(“up_vote_count");
creationDate = new Date(
ɹɹɹɹɹɹɹjson.getInt("creation_date")
ɹɹɹɹɹɹɹ * 1000);
title = json.getString(“title");
JSONObject owner =
ɹɹɹɹɹɹɹjson.getJSONObject("owner");
ownerName =
ɹɹɹɹɹɹɹowner.getString("display_name");
}
}
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KTPOΛ2VFTUJPOʹม
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• json ͷྻͷཁૉͯ͢Λ Question ʹม
@Override
public void onResponse(Call call, final Response response) throws … {
final String body = response.body().string();
try {
JSONObject json = new JSONObject(body);
JSONArray questionsJson = json.getJSONArray("items");
final List questions = new ArrayList<>();
for (int i = 0; i < questionsJson.length(); i++) {
questions.add(new Question(questionsJson.getJSONObject(i)));
}
runOnUiThread(new Runnable() { …
Toast.makeText(MainActivity.this, questions.get(0).title,
Toast.LENGTH_LONG).show();
});
} catch (JSONException ignore) {}
}
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• Ұ൪ͷ Question ͷλΠτϧΛτʔετදࣔ
@Override
public void onResponse(Call call, final Response response) throws … {
final String body = response.body().string();
try {
JSONObject json = new JSONObject(body);
JSONArray questionsJson = json.getJSONArray("items");
final List questions = new ArrayList<>();
for (int i = 0; i < questionsJson.length(); i++) {
questions.add(new Question(questionsJson.getJSONObject(i)));
}
runOnUiThread(new Runnable() { …
Toast.makeText(MainActivity.this, questions.get(0).title,
Toast.LENGTH_LONG).show();
});
} catch (JSONException ignore) {}
}
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࣮ػͰ֬ೝ
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ᶆॲཧͨ݁͠ՌΛදࣔ
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3FDZDMFS7JFX
ಉ͡7JFXΛ܁Γฦ͠Ϧετදࣔ͢Δ7JFX
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3FDZDMFS7JFX
ී௨ʹ্͔ΒViewΛஔ͚͍͍͡ΌΜʁ
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w
⚠ཁૉ͕ݸҎ্ʹͳΔ͜ͱ
w ྫ5XJUUFS
w ͜ͷ࣌ݸಉ࣌ʹViewΛอ࣋ɾཧ͢Δʁ
ˠେͳϝϞϦɾॲཧΛফඅͯ͠͠·͏
3FDZDMFS7JFX
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w Ϧετදࣔಉ͡ߏͷView͕࿈ͳΔ
w จࣈྻͷ༰͕ҧ͏͚ͩ
ˠɹอ࣋ɾཧը໘ʹදࣔ͞ΕΔViewͷΈ
ˠɹҰ࡞ͬͨ7JFX࠶ར༻͠ɺ
දࣔ࣌ʹ༰Λมߋ͢Δ
3FDZDMFS7JFX
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w ͯ͢Λอ࣋ɾཧ
ී௨ͷ7JFX
View
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࣮ࡍͷදࣔྖҬ →
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w อ࣋ɾཧը໘্ͷΈ
3FDZDMFS7JFX
View
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ະੜ
࣮ࡍͷදࣔྖҬ →
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εΫϩʔϧ͞ΕΔͱʜ
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ະੜ
View ͷ࠶ར༻
දࣔྖҬ →
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εΫϩʔϧ͞ΕΔͱʜ
View
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ະੜ
← ৽͍͠Λઃఆ
දࣔྖҬ →
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3FDZDMFS7JFX
࠶ར༻
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w ListView͕ݩʑ͋ͬͨʢ͜Ε࠶ར༻Մೳʣ
w ͦͷڧԽɾΧελϚΠζՄೳ൛
3FDZDMFS7JFX
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Ϧετදࣔ
߲ͷViewΛ࡞
ˣ
RecyclerViewʹදࣔ
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߲ͷ7JFXʢলུʣ
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w ཁૉΛදࣔ͢Δͱ͖ʹViewHolder͕߱ͬͯ͘Δ
w ੜPS࠶ར༻͞ΕͨViewΛؚΉΫϥε
w 7JFX)PMEFSࣗମ࠶ར༻͞Εͨͷ
w ͜ΕΛ༻͍ͯ༰Λઃఆ͢Δ
3FDZDMFS7JFXʹදࣔ
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w ViewͷछྨผʹͦΕͧΕViewHolderΛ࡞Δ
w ࠓճҰ͚ͭͩ
7JFX)PMEFS࡞
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w ࠷ॳʹView͕ੜ͞ΕΔͱ͖ʹݺΕΔ
w findViewByIdੜ࣌ʹҰ͚ͩߦ͏
private class QuestionViewHolder extends RecyclerView.ViewHolder {
private final TextView mCountView;
private final TextView mTitleView;
…
public QuestionViewHolder(View itemView) {
super(itemView);
mCountView = (TextView) itemView.findViewById(R.id.count);
mTitleView = (TextView) itemView.findViewById(R.id.title);
…
}
public void bindView(Question question) {
mCountView.setText(String.valueOf(question.upVoteCount));
mTitleView.setText(question.title);
…
itemView.setOnClickListener(new View.OnClickListener(){ …
Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse(question.link));
v.getContext().startActivity(intent);
});
}
}
}
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private class QuestionViewHolder extends RecyclerView.ViewHolder {
private final TextView mCountView;
private final TextView mTitleView;
…
public QuestionViewHolder(View itemView) {
super(itemView);
mCountView = (TextView) itemView.findViewById(R.id.count);
mTitleView = (TextView) itemView.findViewById(R.id.title);
…
}
public void bindView(Question question) {
mCountView.setText(String.valueOf(question.upVoteCount));
mTitleView.setText(question.title);
…
itemView.setOnClickListener(new View.OnClickListener(){ …
Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse(question.link));
v.getContext().startActivity(intent);
});
}
}
}
w View෦ͷΛઃఆ
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private class QuestionViewHolder extends RecyclerView.ViewHolder {
private final TextView mCountView;
private final TextView mTitleView;
…
public QuestionViewHolder(View itemView) {
super(itemView);
mCountView = (TextView) itemView.findViewById(R.id.count);
mTitleView = (TextView) itemView.findViewById(R.id.title);
…
}
public void bindView(Question question) {
mCountView.setText(String.valueOf(question.upVoteCount));
mTitleView.setText(question.title);
…
itemView.setOnClickListener(new View.OnClickListener(){ …
Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse(question.link));
v.getContext().startActivity(intent);
});
}
}
}
w ΫϦοΫͨ͠Β࣭ϖʔδΛ։͘Α͏ʹ͢Δ
҉తIntentΛ͛Δ
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w RecyclerViewΛૢ࡞͢ΔΫϥε
3FDZDMFS"EBQUFS࡞
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w දࣔ͢ΔQuestionͷϦετ
public class QuestionsRecyclerAdapter extends
RecyclerView.Adapter {
private List mQuestionList = new ArrayList<>();
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View questionView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.question_item, parent, false);
return new QuestionViewHolder(questionView);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
((QuestionViewHolder) holder).bindView(mQuestionList.get(position));
}
public void setQuestionList(List questionList) {
mQuestionList = questionList;
notifyDataSetChanged();
}
@Override
public int getItemCount() {
return mQuestionList.size();
}
}
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w ͜͜ͰViewHolderΛ࡞͢Δ
w ϨΠΞτΛੜˠViewHolderΛ࡞
public class QuestionsRecyclerAdapter extends
RecyclerView.Adapter {
private List mQuestionList = new ArrayList<>();
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View questionView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.question_item, parent, false);
return new QuestionViewHolder(questionView);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
((QuestionViewHolder) holder).bindView(mQuestionList.get(position));
}
public void setQuestionList(List questionList) {
mQuestionList = questionList;
notifyDataSetChanged();
}
@Override
public int getItemCount() {
return mQuestionList.size();
}
}
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w position൪ͷViewͷ༰Λઃఆ͢Δ
w ͜͜ͰViewHolderͷbindViewΛݺΜͰ͍Δ
public class QuestionsRecyclerAdapter extends
RecyclerView.Adapter {
private List mQuestionList = new ArrayList<>();
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View questionView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.question_item, parent, false);
return new QuestionViewHolder(questionView);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
((QuestionViewHolder) holder).bindView(mQuestionList.get(position));
}
public void setQuestionList(List questionList) {
mQuestionList = questionList;
notifyDataSetChanged();
}
@Override
public int getItemCount() {
return mQuestionList.size();
}
}
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w notifyDataSetChanged() Λߦ͏͜ͱͰ
RecyclerViewʹมߋΛ௨͢Δ
public class QuestionsRecyclerAdapter extends
RecyclerView.Adapter {
private List mQuestionList = new ArrayList<>();
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View questionView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.question_item, parent, false);
return new QuestionViewHolder(questionView);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
((QuestionViewHolder) holder).bindView(mQuestionList.get(position));
}
public void setQuestionList(List questionList) {
mQuestionList = questionList;
notifyDataSetChanged();
}
@Override
public int getItemCount() {
return mQuestionList.size();
}
}
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w RecyclerViewʹRecyclerAdapterΛηοτ
3FDZDMFS7JFXઃఆ
public class MainActivity extends AppCompatActivity {
private QuestionsRecyclerAdapter mQuestionsRecyclerAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
…
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
mQuestionsRecyclerAdapter = new QuestionsRecyclerAdapter();
recyclerView.setAdapter(mQuestionsRecyclerAdapter);
}
}
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w RecyclerAdapterʹQuestionΛηοτ
2VFTUJPOΛઃఆ
@Override
public void onResponse(Call call, final Response response) throws IOException {
final String body = response.body().string();
try {
JSONObject json = new JSONObject(body);
ɹɹɹɹɹJSONArray questionsJson = json.getJSONArray("items");
final List questions = new ArrayList<>();
ɹɹɹɹɹfor (int i = 0; i < questionsJson.length(); i++) {
questions.add(new Question(questionsJson.getJSONObject(i)));
}
runOnUiThread(new Runnable() …
mQuestionsRecyclerAdapter.setQuestionList(questions);
);
} catch (JSONException ignore) {}
}
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࣮ػͰ֬ೝ
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J04ฤͪ͜Β