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トップに関する質問Android:RecyclerViewを用いたActivityが正常に動作しない

編集履歴

質問編集履歴

3

問題の修正

2019/09/11 08:16

投稿

noname1234
noname1234

スコア6

test CHANGED
File without changes
test CHANGED
@@ -20,7 +20,7 @@
20
20
 
21
21
 
22
22
 
23
- activity_mainが正常に表示されず、アプリが落ちてしまう。(ビルドはできる)
23
+ RecyclerViewに何も表示されない。(ビルドはできる)
24
24
 
25
25
  ブレークポイントを設置してデバッグしてみましたが、特に問題は確認できませんでした。
26
26
 

2

説明の追記

2019/09/11 08:16

投稿

noname1234
noname1234

スコア6

test CHANGED
File without changes
test CHANGED
@@ -58,6 +58,18 @@
58
58
 
59
59
  追記 2019/9/11
60
60
 
61
+
62
+
63
+ プロジェクトを作成しなおして実行したところ、
64
+
65
+ アプリが落ちることはありませんでしたが、
66
+
67
+ 何も表示されていないRecyclerViewが表示されました。
68
+
69
+ その際の実行ログになります。
70
+
71
+
72
+
61
73
  - 実行時ログ
62
74
 
63
75
  ```

1

ソースの記載

2019/09/11 06:22

投稿

noname1234
noname1234

スコア6

test CHANGED
File without changes
test CHANGED
@@ -52,82 +52,342 @@
52
52
 
53
53
 
54
54
 
55
- - card_itemの差異
56
-
57
-
58
-
59
- 私のソース
55
+
56
+
57
+ ---
58
+
59
+ 追記 2019/9/11
60
+
61
+ - 実行時ログ
62
+
63
+ ```
64
+
65
+ 09/11 13:34:53: Launching app
66
+
67
+ $ adb shell am start -n "com.example.testapp/com.example.testapp.MainActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
68
+
69
+ Connected to process 14163 on device huawei-ale_l02-ARC7N15716001377
70
+
71
+ Capturing and displaying logcat messages from application. This behavior can be disabled in the "Logcat output" section of the "Debugger" settings page.
72
+
73
+ D/HwCust: Create obj success use class android.content.res.HwCustHwResourcesImpl
74
+
75
+ W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm64 --instruction-set-features=smp,a53 --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=generic --instruction-set-features=default --dex-file=/data/app/com.example.testapp-1/split_lib_dependencies_apk.apk --oat-file=/data/dalvik-cache/arm64/data@app@com.example.testapp-1@split_lib_dependencies_apk.apk@classes.dex) because non-0 exit status
76
+
77
+ W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm64 --instruction-set-features=smp,a53 --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=generic --instruction-set-features=default --dex-file=/data/app/com.example.testapp-1/split_lib_slice_0_apk.apk --oat-file=/data/dalvik-cache/arm64/data@app@com.example.testapp-1@split_lib_slice_0_apk.apk@classes.dex) because non-0 exit status
78
+
79
+ W/art: Failed execv(/system/bin/dex2oat --runtime-arg -classpath --runtime-arg --debuggable --instruction-set=arm64 --instruction-set-features=smp,a53 --runtime-arg -Xrelocate --boot-image=/system/framework/boot.art --runtime-arg -Xms64m --runtime-arg -Xmx512m --instruction-set-variant=generic --instruction-set-features=default --dex-file=/data/app/com.example.testapp-1/split_lib_slice_9_apk.apk --oat-file=/data/dalvik-cache/arm64/data@app@com.example.testapp-1@split_lib_slice_9_apk.apk@classes.dex) because non-0 exit status
80
+
81
+ W/System: ClassLoader referenced unknown path: /data/app/com.example.testapp-1/lib/arm64
82
+
83
+ I/InstantRun: starting instant run server: is main process
84
+
85
+ W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter androidx.vectordrawable.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
86
+
87
+ D/HwCust: Create obj success use class android.content.res.HwCustHwResourcesImpl
88
+
89
+ V/HwPolicyFactory: : success to get AllImpl object and return....
90
+
91
+ V/HwWidgetFactory: : successes to get AllImpl object and return....
92
+
93
+ V/ActivityThread: ActivityThread,callActivityOnCreate
94
+
95
+ I/art: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>
96
+
97
+ I/art: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>
98
+
99
+ D/CubicBezierInterpolator: CubicBezierInterpolator mControlPoint1x = 0.15, mControlPoint1y = 0.7, mControlPoint2x = 0.2, mControlPoint2y = 0.98
100
+
101
+ D/CubicBezierInterpolator: CubicBezierInterpolator mControlPoint1x = 0.6, mControlPoint1y = 0.9, mControlPoint2x = 0.8, mControlPoint2y = 1.0
102
+
103
+ D/CubicBezierInterpolator: CubicBezierInterpolator mControlPoint1x = 0.15, mControlPoint1y = 0.7, mControlPoint2x = 0.2, mControlPoint2y = 0.98
104
+
105
+ D/CubicBezierInterpolator: CubicBezierInterpolator mControlPoint1x = 0.6, mControlPoint1y = 0.9, mControlPoint2x = 0.8, mControlPoint2y = 1.0
106
+
107
+ I/HwSecImmHelper: mSecurityInputMethodService is null
108
+
109
+ D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: false
110
+
111
+ E/HAL: load: id=gralloc != hmi->id=gralloc
112
+
113
+ V/ActivityThread: Resuming ActivityRecord{67ba0d9 token=android.os.BinderProxy@6484b52 {com.example.testapp/com.example.testapp.MainActivity}} with isForward=true,forwardBitChanged=false
114
+
115
+ V/ActivityThread: Resuming ActivityRecord{67ba0d9 token=android.os.BinderProxy@6484b52 {com.example.testapp/com.example.testapp.MainActivity}} with isForward=true,forwardBitChanged=false
116
+
117
+ E/HAL: load: id=gralloc != hmi->id=gralloc
118
+
119
+ I/OpenGLRenderer: Initialized EGL, version 1.4
120
+
121
+ W/OpenGLRenderer: load: so=/system/lib64/libhwuibp.so
122
+
123
+ dlopen failed: library "/system/lib64/libhwuibp.so" not found
124
+
125
+ Initialize Binary Program Cache: Load Failed
126
+
127
+ E/HAL: load: id=gralloc != hmi->id=gralloc
128
+
129
+ I/HwSecImmHelper: mSecurityInputMethodService is null
130
+
131
+ mSecurityInputMethodService is null
132
+
133
+
134
+
135
+ ```
136
+
137
+
138
+
139
+ - item.java
60
140
 
61
141
  ```ここに言語を入力
62
142
 
143
+ public class item {
144
+
145
+
146
+
63
- <ImageView
147
+ int background;
148
+
64
-
149
+ String profileName;
150
+
151
+ int profilePhoto;
152
+
153
+ int nbFollowers;
154
+
155
+
156
+
157
+ public item() {
158
+
159
+ }
160
+
161
+
162
+
163
+ public item(int background, String profileName, int profilePhoto, int nbFollowers) {
164
+
165
+ this.background = background;
166
+
167
+ this.profileName = profileName;
168
+
169
+ this.profilePhoto = profilePhoto;
170
+
171
+ this.nbFollowers = nbFollowers;
172
+
173
+ }
174
+
175
+
176
+
177
+ public int getBackground() {
178
+
179
+ return background;
180
+
181
+ }
182
+
183
+
184
+
185
+ public String getProfileName() {
186
+
187
+ return profileName;
188
+
189
+ }
190
+
191
+
192
+
193
+ public int getProfilePhoto() {
194
+
195
+ return profilePhoto;
196
+
197
+ }
198
+
199
+
200
+
201
+ public int getNbFollowers() {
202
+
203
+ return nbFollowers;
204
+
205
+ }
206
+
207
+
208
+
65
- android:id="@+id/card_background"
209
+ public void setBackground(int background) {
66
-
210
+
67
- android:layout_width="match_parent"
211
+ this.background = background;
68
-
212
+
69
- android:layout_height="match_parent"
213
+ }
70
-
71
- app:layout_constraintBottom_toBottomOf="parent"
214
+
72
-
73
- app:layout_constraintEnd_toEndOf="parent"
215
+
74
-
216
+
75
- app:layout_constraintStart_toStartOf="parent"
217
+ public void setProfileName(String profileName) {
218
+
76
-
219
+ this.profileName = profileName;
220
+
221
+ }
222
+
223
+
224
+
77
- app:layout_constraintTop_toTopOf="parent"
225
+ public void setProfilePhoto(int profilePhoto) {
226
+
78
-
227
+ this.profilePhoto = profilePhoto;
228
+
229
+ }
230
+
231
+
232
+
79
- → android:background="#ececec" />
233
+ public void setNbFollowers(int nbFollowers) {
234
+
80
-
235
+ this.nbFollowers = nbFollowers;
236
+
237
+ }
238
+
239
+ }
240
+
81
- ```
241
+ ```
82
-
242
+
83
- 動画のソース
243
+ - Adapter.java
84
244
 
85
245
  ```ここに言語を入力
86
246
 
247
+ public class Adapter extends RecyclerView.Adapter<Adapter.myViewHolder> {
248
+
249
+
250
+
251
+ Context mContext;
252
+
253
+ List<item> mData;
254
+
255
+
256
+
257
+ public Adapter(Context mContext, List<item> mData) {
258
+
259
+ this.mContext = mContext;
260
+
261
+ this.mData = mData;
262
+
263
+ }
264
+
265
+
266
+
267
+ @NonNull
268
+
269
+ @Override
270
+
271
+ public myViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
272
+
273
+
274
+
275
+ LayoutInflater inflater = LayoutInflater.from(mContext);
276
+
277
+ View v = inflater.inflate(R.layout.card_item,parent,false);
278
+
279
+ return new myViewHolder(v);
280
+
281
+ }
282
+
283
+
284
+
285
+ @Override
286
+
287
+ public void onBindViewHolder(@NonNull myViewHolder holder, int position) {
288
+
289
+
290
+
291
+ holder.background_img.setImageResource(mData.get(position).getBackground());
292
+
293
+ holder.profile_photo.setImageResource(mData.get(position).getProfilePhoto());
294
+
295
+ holder.tv_title.setText(mData.get(position).getProfileName());
296
+
297
+ holder.tv_nbFollowers.setText(mData.get(position).getNbFollowers()+"Followers");
298
+
299
+
300
+
301
+ }
302
+
303
+
304
+
305
+ @Override
306
+
307
+ public int getItemCount() {
308
+
309
+ return 0;
310
+
311
+ }
312
+
313
+
314
+
315
+ public class myViewHolder extends RecyclerView.ViewHolder {
316
+
317
+
318
+
319
+ ImageView profile_photo,background_img;
320
+
321
+ TextView tv_title,tv_nbFollowers;
322
+
323
+
324
+
325
+ public myViewHolder(View itemView) {
326
+
87
- <ImageView
327
+ super(itemView);
328
+
88
-
329
+ profile_photo = itemView.findViewById(R.id.profile_img);
330
+
89
- android:id="@+id/card_background"
331
+ background_img = itemView.findViewById(R.id.card_background);
90
-
91
- android:layout_width="match_parent"
332
+
92
-
93
- android:layout_height="match_parent"
94
-
95
- app:layout_constraintBottom_toBottomOf="parent"
96
-
97
- app:layout_constraintEnd_toEndOf="parent"
333
+ tv_title = itemView.findViewById(R.id.card_title);
98
-
334
+
99
- app:layout_constraintStart_toStartOf="parent"
335
+ tv_nbFollowers = itemView.findViewById(R.id.card_nb_follower);
100
-
336
+
101
- app:layout_constraintTop_toTopOf="parent"
337
+ }
102
-
338
+
103
- → android:srccompat="#e6e6e6" />
339
+ }
340
+
104
-
341
+ }
342
+
105
- ```
343
+ ```
106
-
344
+
107
- - build.gradleの差異
345
+ - MainActivity.java
108
-
109
-
110
-
111
- 私のソース
112
346
 
113
347
  ```ここに言語を入力
114
348
 
349
+ public class MainActivity extends AppCompatActivity {
350
+
351
+
352
+
353
+ @Override
354
+
355
+ protected void onCreate(Bundle savedInstanceState) {
356
+
115
- compileSdkVersion 29
357
+ super.onCreate(savedInstanceState);
358
+
116
-
359
+ setContentView(R.layout.activity_main);
360
+
361
+
362
+
117
- 　　minSdkVersion 21
363
+ Window w = getWindow();
364
+
118
-
365
+ w.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
366
+
367
+
368
+
369
+ RecyclerView recyclerView = findViewById(R.id.rv_list);
370
+
371
+ List<item> mlist = new ArrayList<>();
372
+
373
+ mlist.add(new item(R.drawable.food,"Food",R.drawable.ic_people, 2500));
374
+
375
+ mlist.add(new item(R.drawable.food,"Food",R.drawable.ic_people, 2500));
376
+
377
+ mlist.add(new item(R.drawable.food,"Food",R.drawable.ic_people, 2500));
378
+
379
+ mlist.add(new item(R.drawable.food,"Food",R.drawable.ic_people, 2500));
380
+
381
+ mlist.add(new item(R.drawable.food,"Food",R.drawable.ic_people, 2500));
382
+
383
+ Adapter adapter = new Adapter(this,mlist);
384
+
385
+ recyclerView.setLayoutManager(new LinearLayoutManager(this));
386
+
119
- 　　targetSdkVersion 29
387
+ recyclerView.setAdapter(adapter);
388
+
120
-
389
+ }
390
+
391
+ }
392
+
121
- ```
393
+ ```
122
-
123
- 動画のソース
124
-
125
- ```ここに言語を入力
126
-
127
- compileSdkVersion 27
128
-
129
- 　　minSdkVersion 15
130
-
131
- 　　targetSdkVersion 27
132
-
133
- ```