teratail
回答率
85.48%
質問するログイン新規登録
トップに関する質問Android開発 ListViewの遷移について

編集履歴

質問編集履歴

10

___

2017/02/10 19:53

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
@@ -1,11 +1,3 @@
1
- ###ListViewでの遷移について
2
-
3
- Web上のJson形式のファイルを受け取ってそれをlistviewで表示するアプリを作りました。次に遷移するようにしようとしたところ値は持っていってるはずなのですが、
4
-
5
- クリックすると
6
-
7
-
8
-
9
1
  > D/AndroidRuntime: Shutting down VM
10
2
 
11
3
  E/AndroidRuntime: FATAL EXCEPTION: main
@@ -52,306 +44,4 @@
52
44
 
53
45
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
54
46
 
55
- at android.os.Handler.dispatchMessage(Handler.java:102) 
56
-
57
- at android.os.Looper.loop(Looper.java:154) 
58
-
59
- at android.app.ActivityThread.main(ActivityThread.java:6077) 
60
-
61
- at java.lang.reflect.Method.invoke(Native Method) 
62
-
63
- at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
64
-
65
- at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 
66
-
67
-
68
-
69
-
70
-
71
-
72
-
73
- というエラーで落ちてしまいます。
74
-
75
- 対処法が分かりません。
76
-
77
- どのようにすればいいかご教授お願いします。
78
-
79
- Main.ActivityのonitemclickのところとSub.Activityです。
80
-
81
-
82
-
83
- ```Java
84
-
85
- package com.list;
86
-
87
-
88
-
89
- import android.content.Intent;
90
-
91
- import android.os.Bundle;
92
-
93
- import android.support.v7.app.AppCompatActivity;
94
-
95
- import android.view.View;
96
-
97
- import android.widget.AdapterView;
98
-
99
- import android.widget.ListView;
100
-
101
- import android.widget.Toast;
102
-
103
-
104
-
105
- import com.android.volley.RequestQueue;
106
-
107
- import com.android.volley.Response;
108
-
109
- import com.android.volley.VolleyError;
110
-
111
- import com.android.volley.toolbox.StringRequest;
112
-
113
- import com.android.volley.toolbox.Volley;
114
-
115
-
116
-
117
- import java.util.List;
118
-
119
-
120
-
121
- /**
122
-
123
- * Created by yu on 2017/02/05.
124
-
125
- */
126
-
127
-
128
-
129
- public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {
130
-
131
- List<json> sweetsList;
132
-
133
- ListView lv;
134
-
135
- String uri = "URL";
136
-
137
-
138
-
139
- @Override
140
-
141
- protected void onCreate(Bundle savedInstanceState) {
142
-
143
- super.onCreate(savedInstanceState);
144
-
145
- setContentView(R.layout.activity_main);
146
-
147
-
148
-
149
- lv = (ListView) findViewById(R.id.listView);
150
-
151
- requestData(uri);
152
-
153
-
154
-
155
- //lv.setAdapter();
156
-
157
- lv.setOnItemClickListener(this);
158
-
159
- }
160
-
161
-
162
-
163
- //画面遷移
164
-
165
- //ListView lv = (ListView) findViewById(R.id.listView);
166
-
167
-
168
-
169
- //listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
170
-
171
- @Override
172
-
173
- public void onItemClick(AdapterView<?> parent, View view, int position, long id)
174
-
175
- {
176
-
177
-
178
-
179
-
180
-
181
-
182
-
183
- Intent intent = new Intent(getApplication(), SubActivity.class);
184
-
185
-
186
-
187
- intent.putExtra("ID", id);
188
-
189
-
190
-
191
- // Activity をスイッチする
192
-
193
- startActivity(intent);
194
-
195
- //long get_id = id;
196
-
197
- }
198
-
199
- //});
200
-
201
-
202
-
203
- public void requestData(String uri) {
204
-
205
-
206
-
207
- StringRequest request = new StringRequest(uri,
208
-
209
-
210
-
211
- new Response.Listener<String>(){
212
-
213
- @Override
214
-
215
- public void onResponse(String response) {
216
-
217
- sweetsList = jsonParser.parseData(response);
218
-
219
- Adapter adapter = new Adapter(MainActivity.this, sweetsList);
220
-
221
- lv.setAdapter(adapter);
222
-
223
-
224
-
225
- }
226
-
227
- },
47
+ at
228
-
229
- //エラー関係
230
-
231
- new Response.ErrorListener() {
232
-
233
- @Override
234
-
235
- public void onErrorResponse(VolleyError error) {
236
-
237
-
238
-
239
- Toast.makeText(MainActivity.this, error.getMessage().toString(), Toast.LENGTH_SHORT).show();
240
-
241
- }
242
-
243
- });
244
-
245
-
246
-
247
- RequestQueue queue = Volley.newRequestQueue(this);
248
-
249
- queue.add(request);
250
-
251
- }
252
-
253
-
254
-
255
- }
256
-
257
- ```
258
-
259
- ```Java
260
-
261
- package com.list;
262
-
263
-
264
-
265
- import android.content.Context;
266
-
267
- import android.content.Intent;
268
-
269
- import android.os.Bundle;
270
-
271
- import android.support.v7.app.AppCompatActivity;
272
-
273
- import android.widget.ImageView;
274
-
275
- import android.widget.ListView;
276
-
277
- import android.widget.TextView;
278
-
279
-
280
-
281
- import com.squareup.picasso.Picasso;
282
-
283
-
284
-
285
- import java.util.List;
286
-
287
-
288
-
289
- public class SubActivity extends AppCompatActivity {
290
-
291
-
292
-
293
- private Context context;
294
-
295
- List<json> sList;
296
-
297
- ListView lv;
298
-
299
-
300
-
301
- ImageView imageView;
302
-
303
- TextView textView, textView2;
304
-
305
-
306
-
307
- protected int id;
308
-
309
- protected String name;
310
-
311
- protected String imgUrl;
312
-
313
- protected String description;
314
-
315
-
316
-
317
- @Override
318
-
319
- protected void onCreate(Bundle savedInstanceState) {
320
-
321
-
322
-
323
- super.onCreate(savedInstanceState);
324
-
325
- setContentView(R.layout.activity_sub);
326
-
327
-
328
-
329
- //MainActivityから受け取る
330
-
331
- Intent intent = getIntent();
332
-
333
-
334
-
335
- Long num = intent.getLongExtra("ID", 0);
336
-
337
- Integer id = new Integer(num.toString());
338
-
339
-
340
-
341
- imageView =(ImageView) findViewById(R.id.imgUrl);
342
-
343
- textView = (TextView) findViewById(R.id.tvname);
344
-
345
-
346
-
347
- textView.setText(Adapter.json[id].getName());
348
-
349
- Picasso.with(context).load(Adapter.json[id].getImgUrl()).into(imageView);
350
-
351
- }
352
-
353
-
354
-
355
- }
356
-
357
- ```

9

引用文化していなかったので再編集

2017/02/10 19:53

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
@@ -4,7 +4,9 @@
4
4
 
5
5
  クリックすると
6
6
 
7
+
8
+
7
- >D/AndroidRuntime: Shutting down VM
9
+ > D/AndroidRuntime: Shutting down VM
8
10
 
9
11
  E/AndroidRuntime: FATAL EXCEPTION: main
10
12
 

8

sub\.activityの追加Adapterの削除

2017/02/06 10:46

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
@@ -256,122 +256,100 @@
256
256
 
257
257
  ```Java
258
258
 
259
+ package com.list;
260
+
261
+
262
+
263
+ import android.content.Context;
264
+
265
+ import android.content.Intent;
266
+
267
+ import android.os.Bundle;
268
+
269
+ import android.support.v7.app.AppCompatActivity;
270
+
271
+ import android.widget.ImageView;
272
+
273
+ import android.widget.ListView;
274
+
275
+ import android.widget.TextView;
276
+
277
+
278
+
279
+ import com.squareup.picasso.Picasso;
280
+
281
+
282
+
283
+ import java.util.List;
284
+
285
+
286
+
259
- public class Adapter extends ArrayAdapter<json> {
287
+ public class SubActivity extends AppCompatActivity {
260
-
261
- public static json[] json;
288
+
289
+
262
290
 
263
291
  private Context context;
264
292
 
265
- private List<json> sList;
293
+ List<json> sList;
294
+
266
-
295
+ ListView lv;
296
+
297
+
298
+
299
+ ImageView imageView;
300
+
267
- private LayoutInflater inflater = null;
301
+ TextView textView, textView2;
268
-
269
- //public static final String IMAGE_BASEURL = "";
302
+
270
-
303
+
304
+
271
- private LruCache<Integer,Bitmap> imageCache;
305
+ protected int id;
272
-
306
+
273
- private RequestQueue queue;
307
+ protected String name;
308
+
274
-
309
+ protected String imgUrl;
310
+
311
+ protected String description;
312
+
313
+
314
+
315
+ @Override
316
+
275
- public Adapter(Context context, List<json> list) {
317
+ protected void onCreate(Bundle savedInstanceState) {
276
-
318
+
319
+
320
+
277
- super(context, 0);
321
+ super.onCreate(savedInstanceState);
322
+
278
-
323
+ setContentView(R.layout.activity_sub);
324
+
325
+
326
+
327
+ //MainActivityから受け取る
328
+
279
- this.context = context;
329
+ Intent intent = getIntent();
280
-
330
+
331
+
332
+
281
- this.sList = list;
333
+ Long num = intent.getLongExtra("ID", 0);
282
-
334
+
283
- inflater = LayoutInflater.from(context);
335
+ Integer id = new Integer(num.toString());
284
-
285
- final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
336
+
286
-
287
- final int cacheSize = maxMemory / 8;
337
+
288
-
338
+
289
- imageCache = new LruCache<>(cacheSize);
339
+ imageView =(ImageView) findViewById(R.id.imgUrl);
290
-
291
-
292
-
340
+
293
- queue = Volley.newRequestQueue(context);
341
+ textView = (TextView) findViewById(R.id.tvname);
342
+
343
+
344
+
345
+ textView.setText(Adapter.json[id].getName());
346
+
347
+ Picasso.with(context).load(Adapter.json[id].getImgUrl()).into(imageView);
294
348
 
295
349
  }
296
350
 
297
- public class ViewHolder {
351
+
298
-
299
- TextView _name;
352
+
300
-
301
- TextView _description;
302
-
303
- //TextView _plateform;
304
-
305
- ImageView _imgUrl;
306
-
307
- }
353
+ }
308
-
309
- @Override
310
-
311
- public int getCount() {
312
-
313
- return sList.size();
314
-
315
- }
316
-
317
- @Nullable
318
-
319
- @Override
320
-
321
- public json getItem(int position) {
322
-
323
- return sList.get(position);
324
-
325
- }
326
-
327
- @Override
328
-
329
- public long getItemId(int position) {
330
-
331
- return position;
332
-
333
- }
334
-
335
- @Override
336
-
337
- public View getView(int position, View convertView, ViewGroup viewGroup) {
338
-
339
- final json s = sList.get(position);
340
-
341
- final com.list.Adapter.ViewHolder holder;
342
-
343
- if(convertView == null) {
344
-
345
- convertView = inflater.inflate(R.layout.list_item_templates,null);
346
-
347
- //convertView = inflater.inflate(R.layout.list_item_detail,null);
348
-
349
- holder = new com.list.Adapter.ViewHolder();
350
-
351
- holder._name = (TextView) convertView.findViewById(R.id.tvname);
352
-
353
- holder._description = (TextView) convertView.findViewById(R.id.tvdescription);
354
-
355
- //holder._plateform = (TextView) convertView.findViewById(R.id.tvplateform);
356
-
357
- convertView.setTag(holder);
358
-
359
- }
360
-
361
- else {
362
-
363
- holder = (com.list.Adapter.ViewHolder) convertView.getTag();
364
-
365
- }
366
-
367
- holder._name.setText(s.getName().toString());
368
-
369
- holder._description.setText(s.getDescription().toString());
370
-
371
- //holder._plateform.setText(s.getPlatforms().toString());
372
-
373
- Bitmap bitmap = imageCache.get(Integer.parseInt(s.getId()));
374
-
375
- holder._imgUrl = (ImageView) convertView.findViewById(R.id.imgUrl);
376
354
 
377
355
  ```

7

Java内の編集

2017/02/06 10:42

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
@@ -4,13 +4,13 @@
4
4
 
5
5
  クリックすると
6
6
 
7
- >--------- beginning of crash
7
+ >D/AndroidRuntime: Shutting down VM
8
8
 
9
9
  E/AndroidRuntime: FATAL EXCEPTION: main
10
10
 
11
- Process: com.list, PID: 2415
11
+ Process: com.list, PID: 2942
12
-
12
+
13
- java.lang.RuntimeException: Unable to start activity ComponentInfo{com.list
13
+ java.lang.RuntimeException: Unable to start activity ComponentInfo{com.list/
14
14
 
15
15
  com.list.SubActivity}: java.lang.NullPointerException: Attempt to read from null array
16
16
 
@@ -36,7 +36,7 @@
36
36
 
37
37
  Caused by: java.lang.NullPointerException: Attempt to read from null array
38
38
 
39
- at com.list.SubActivity.onCreate(SubActivity.java:86)
39
+ at com.list.SubActivity.onCreate(SubActivity.java:54)
40
40
 
41
41
  at android.app.Activity.performCreate(Activity.java:6664)
42
42
 
@@ -62,7 +62,7 @@
62
62
 
63
63
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 
64
64
 
65
- Application terminated.
65
+
66
66
 
67
67
 
68
68
 
@@ -80,14 +80,60 @@
80
80
 
81
81
  ```Java
82
82
 
83
+ package com.list;
84
+
85
+
86
+
87
+ import android.content.Intent;
88
+
89
+ import android.os.Bundle;
90
+
91
+ import android.support.v7.app.AppCompatActivity;
92
+
93
+ import android.view.View;
94
+
95
+ import android.widget.AdapterView;
96
+
97
+ import android.widget.ListView;
98
+
99
+ import android.widget.Toast;
100
+
101
+
102
+
103
+ import com.android.volley.RequestQueue;
104
+
105
+ import com.android.volley.Response;
106
+
107
+ import com.android.volley.VolleyError;
108
+
109
+ import com.android.volley.toolbox.StringRequest;
110
+
111
+ import com.android.volley.toolbox.Volley;
112
+
113
+
114
+
115
+ import java.util.List;
116
+
117
+
118
+
119
+ /**
120
+
121
+ * Created by yu on 2017/02/05.
122
+
123
+ */
124
+
125
+
126
+
83
127
  public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener {
84
128
 
85
- List<json> sList;
129
+ List<json> sweetsList;
86
130
 
87
131
  ListView lv;
88
132
 
89
133
  String uri = "URL";
90
134
 
135
+
136
+
91
137
  @Override
92
138
 
93
139
  protected void onCreate(Bundle savedInstanceState) {
@@ -96,35 +142,49 @@
96
142
 
97
143
  setContentView(R.layout.activity_main);
98
144
 
145
+
146
+
99
147
  lv = (ListView) findViewById(R.id.listView);
100
148
 
101
149
  requestData(uri);
102
150
 
151
+
152
+
153
+ //lv.setAdapter();
154
+
103
155
  lv.setOnItemClickListener(this);
104
156
 
105
157
  }
106
158
 
159
+
160
+
107
161
  //画面遷移
108
162
 
163
+ //ListView lv = (ListView) findViewById(R.id.listView);
164
+
165
+
166
+
167
+ //listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
168
+
109
169
  @Override
110
170
 
111
171
  public void onItemClick(AdapterView<?> parent, View view, int position, long id)
112
172
 
113
173
  {
114
174
 
175
+
176
+
177
+
178
+
179
+
180
+
115
181
  Intent intent = new Intent(getApplication(), SubActivity.class);
116
182
 
183
+
184
+
117
185
  intent.putExtra("ID", id);
118
186
 
119
- // clickされたpositionのnameとimageUrlとdescriptionのID
187
+
120
-
121
- /*ListView listView = (ListView) parent;
122
-
123
-
124
-
125
- String item = (String) listView.getItemAtPosition(position);*/
126
-
127
- //intent.putExtra("ID", adapter.getItem(position));
128
188
 
129
189
  // Activity をスイッチする
130
190
 
@@ -134,22 +194,32 @@
134
194
 
135
195
  }
136
196
 
197
+ //});
198
+
199
+
200
+
137
201
  public void requestData(String uri) {
138
202
 
203
+
204
+
139
205
  StringRequest request = new StringRequest(uri,
140
206
 
207
+
208
+
141
209
  new Response.Listener<String>(){
142
210
 
143
211
  @Override
144
212
 
145
213
  public void onResponse(String response) {
146
214
 
147
- sList = jsonParser.parseData(response);
215
+ sweetsList = jsonParser.parseData(response);
148
-
216
+
149
- Adapter adapter = new Adapter(MainActivity.this, sList);
217
+ Adapter adapter = new Adapter(MainActivity.this, sweetsList);
150
218
 
151
219
  lv.setAdapter(adapter);
152
220
 
221
+
222
+
153
223
  }
154
224
 
155
225
  },
@@ -162,196 +232,146 @@
162
232
 
163
233
  public void onErrorResponse(VolleyError error) {
164
234
 
235
+
236
+
165
237
  Toast.makeText(MainActivity.this, error.getMessage().toString(), Toast.LENGTH_SHORT).show();
166
238
 
167
239
  }
168
240
 
169
241
  });
170
242
 
243
+
244
+
171
245
  RequestQueue queue = Volley.newRequestQueue(this);
172
246
 
173
247
  queue.add(request);
174
248
 
175
249
  }
176
250
 
251
+
252
+
177
253
  }
178
254
 
179
-
180
-
181
255
  ```
182
256
 
183
257
  ```Java
184
258
 
185
- public class SubActivity extends AppCompatActivity {
186
-
187
- List<json> sList;
188
-
189
- ListView lv;
190
-
191
- String uri = "URL";
192
-
193
- ImageView imageView;
194
-
195
- TextView textView, textView2;
196
-
197
- protected int id;
198
-
199
- /*protected String imgUrl;
200
-
201
- protected String description;*/
202
-
203
- @Override
204
-
205
- protected void onCreate(Bundle savedInstanceState) {
206
-
207
- super.onCreate(savedInstanceState);
208
-
209
- setContentView(R.layout.activity_sub);
210
-
211
- List<json> sList;
212
-
213
-
214
-
215
- Intent intent = getIntent();
216
-
217
- Long num = intent.getLongExtra("ID", 0);
218
-
219
- Integer id = new Integer(num.toString());
220
-
221
-
222
-
223
- imageView =(ImageView) findViewById(R.id.imgUrl);
224
-
225
- textView = (TextView) findViewById(R.id.tvname);
226
-
227
-
228
-
229
- textView.setText(Adapter.json[id].getName());
230
-
231
- Picasso.with(context).load(Adapter.json[id].getImgUrl()).into(imageView);
232
-
233
- }
259
+ public class Adapter extends ArrayAdapter<json> {
260
+
261
+ public static json[] json;
262
+
263
+ private Context context;
264
+
265
+ private List<json> sList;
266
+
267
+ private LayoutInflater inflater = null;
268
+
269
+ //public static final String IMAGE_BASEURL = "";
270
+
271
+ private LruCache<Integer,Bitmap> imageCache;
272
+
273
+ private RequestQueue queue;
274
+
275
+ public Adapter(Context context, List<json> list) {
276
+
277
+ super(context, 0);
278
+
279
+ this.context = context;
280
+
281
+ this.sList = list;
282
+
283
+ inflater = LayoutInflater.from(context);
284
+
285
+ final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
286
+
287
+ final int cacheSize = maxMemory / 8;
288
+
289
+ imageCache = new LruCache<>(cacheSize);
290
+
291
+
292
+
293
+ queue = Volley.newRequestQueue(context);
294
+
295
+ }
296
+
297
+ public class ViewHolder {
298
+
299
+ TextView _name;
300
+
301
+ TextView _description;
302
+
303
+ //TextView _plateform;
304
+
305
+ ImageView _imgUrl;
306
+
307
+ }
308
+
309
+ @Override
310
+
311
+ public int getCount() {
312
+
313
+ return sList.size();
314
+
315
+ }
316
+
317
+ @Nullable
318
+
319
+ @Override
320
+
321
+ public json getItem(int position) {
322
+
323
+ return sList.get(position);
324
+
325
+ }
326
+
327
+ @Override
328
+
329
+ public long getItemId(int position) {
330
+
331
+ return position;
332
+
333
+ }
334
+
335
+ @Override
336
+
337
+ public View getView(int position, View convertView, ViewGroup viewGroup) {
338
+
339
+ final json s = sList.get(position);
340
+
341
+ final com.list.Adapter.ViewHolder holder;
342
+
343
+ if(convertView == null) {
344
+
345
+ convertView = inflater.inflate(R.layout.list_item_templates,null);
346
+
347
+ //convertView = inflater.inflate(R.layout.list_item_detail,null);
348
+
349
+ holder = new com.list.Adapter.ViewHolder();
350
+
351
+ holder._name = (TextView) convertView.findViewById(R.id.tvname);
352
+
353
+ holder._description = (TextView) convertView.findViewById(R.id.tvdescription);
354
+
355
+ //holder._plateform = (TextView) convertView.findViewById(R.id.tvplateform);
356
+
357
+ convertView.setTag(holder);
358
+
359
+ }
360
+
361
+ else {
362
+
363
+ holder = (com.list.Adapter.ViewHolder) convertView.getTag();
364
+
365
+ }
366
+
367
+ holder._name.setText(s.getName().toString());
368
+
369
+ holder._description.setText(s.getDescription().toString());
370
+
371
+ //holder._plateform.setText(s.getPlatforms().toString());
372
+
373
+ Bitmap bitmap = imageCache.get(Integer.parseInt(s.getId()));
374
+
375
+ holder._imgUrl = (ImageView) convertView.findViewById(R.id.imgUrl);
234
376
 
235
377
  ```
236
-
237
- ```Java
238
-
239
- public class Adapter extends ArrayAdapter<json> {
240
-
241
- public static json[] json;
242
-
243
- private Context context;
244
-
245
- private List<json> sList;
246
-
247
- private LayoutInflater inflater = null;
248
-
249
- //public static final String IMAGE_BASEURL = "";
250
-
251
- private LruCache<Integer,Bitmap> imageCache;
252
-
253
- private RequestQueue queue;
254
-
255
- public Adapter(Context context, List<json> list) {
256
-
257
- super(context, 0);
258
-
259
- this.context = context;
260
-
261
- this.sList = list;
262
-
263
- inflater = LayoutInflater.from(context);
264
-
265
- final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
266
-
267
- final int cacheSize = maxMemory / 8;
268
-
269
- imageCache = new LruCache<>(cacheSize);
270
-
271
-
272
-
273
- queue = Volley.newRequestQueue(context);
274
-
275
- }
276
-
277
- public class ViewHolder {
278
-
279
- TextView _name;
280
-
281
- TextView _description;
282
-
283
- //TextView _plateform;
284
-
285
- ImageView _imgUrl;
286
-
287
- }
288
-
289
- @Override
290
-
291
- public int getCount() {
292
-
293
- return sList.size();
294
-
295
- }
296
-
297
- @Nullable
298
-
299
- @Override
300
-
301
- public json getItem(int position) {
302
-
303
- return sList.get(position);
304
-
305
- }
306
-
307
- @Override
308
-
309
- public long getItemId(int position) {
310
-
311
- return position;
312
-
313
- }
314
-
315
- @Override
316
-
317
- public View getView(int position, View convertView, ViewGroup viewGroup) {
318
-
319
- final json s = sList.get(position);
320
-
321
- final com.list.Adapter.ViewHolder holder;
322
-
323
- if(convertView == null) {
324
-
325
- convertView = inflater.inflate(R.layout.list_item_templates,null);
326
-
327
- //convertView = inflater.inflate(R.layout.list_item_detail,null);
328
-
329
- holder = new com.list.Adapter.ViewHolder();
330
-
331
- holder._name = (TextView) convertView.findViewById(R.id.tvname);
332
-
333
- holder._description = (TextView) convertView.findViewById(R.id.tvdescription);
334
-
335
- //holder._plateform = (TextView) convertView.findViewById(R.id.tvplateform);
336
-
337
- convertView.setTag(holder);
338
-
339
- }
340
-
341
- else {
342
-
343
- holder = (com.list.Adapter.ViewHolder) convertView.getTag();
344
-
345
- }
346
-
347
- holder._name.setText(s.getName().toString());
348
-
349
- holder._description.setText(s.getDescription().toString());
350
-
351
- //holder._plateform.setText(s.getPlatforms().toString());
352
-
353
- Bitmap bitmap = imageCache.get(Integer.parseInt(s.getId()));
354
-
355
- holder._imgUrl = (ImageView) convertView.findViewById(R.id.imgUrl);
356
-
357
- ```

6

エラー内容の追記

2017/02/06 10:37

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
@@ -4,101 +4,67 @@
4
4
 
5
5
  クリックすると
6
6
 
7
- > W/Bundle: Key ID expected Integer but value was a java.lang.Long.
8
-
9
- The default value 1 was returned. W/Bundle: Attempt to cast generated internal exception:
10
-
11
- java.lang.ClassCastException: java.lang.Long cannot be cast to
12
-
13
- java.lang.Integer
14
-
15
- at android.os.BaseBundle.getInt(BaseBundle.java:873)
16
-
17
- at android.content.Intent.getIntExtra(Intent.java:6146)
18
-
19
- at com.list.SubActivity.onCreate(SubActivity.java:63)
20
-
21
- at android.app.Activity.performCreate(Activity.java:6664)
22
-
23
- at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
24
-
25
- at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
26
-
27
- at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
28
-
29
- at android.app.ActivityThread.-wrap12(ActivityThread.java)
30
-
31
- at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
32
-
33
- at android.os.Handler.dispatchMessage(Handler.java:102)
34
-
35
- at android.os.Looper.loop(Looper.java:154)
36
-
37
- at android.app.ActivityThread.main(ActivityThread.java:6077)
38
-
39
- at java.lang.reflect.Method.invoke(Native Method)
40
-
41
- at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
42
-
43
- at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) D/AndroidRuntime: Shutting down VM E/AndroidRuntime: FATAL EXCEPTION: main
44
-
45
- Process: com.list, PID: 2414
46
-
47
- java.lang.RuntimeException: Unable to start activity
48
-
49
- ComponentInfo{com.list/com.list.SubActivity}:
50
-
51
- java.lang.NullPointerException: Attempt to read from null array
52
-
53
- at android.app.ActivityThread.performLaunchActivity(ActivityThread.
54
-
55
- java:2646)
56
-
57
- at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
58
-
59
- at android.app.ActivityThread.-wrap12(ActivityThread.java)
60
-
61
- at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
62
-
63
- at android.os.Handler.dispatchMessage(Handler.java:102)
64
-
65
- at android.os.Looper.loop(Looper.java:154)
66
-
67
- at android.app.ActivityThread.main(ActivityThread.java:6077)
68
-
69
- at java.lang.reflect.Method.invoke(Native Method)
70
-
71
- at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
72
-
73
- at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
74
-
75
- Caused by: java.lang.NullPointerException: Attempt to read from null array
76
-
77
- at com.list.SubActivity.onCreate(SubActivity.java:86)
78
-
79
- at android.app.Activity.performCreate(Activity.java:6664)
80
-
81
- at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
82
-
83
- at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
84
-
85
- at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
86
-
87
- at android.app.ActivityThread.-wrap12(ActivityThread.java) 
88
-
89
- at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
90
-
91
- at android.os.Handler.dispatchMessage(Handler.java:102) 
92
-
93
- at android.os.Looper.loop(Looper.java:154) 
94
-
95
- at android.app.ActivityThread.main(ActivityThread.java:6077) 
96
-
97
- at java.lang.reflect.Method.invoke(Native Method) 
98
-
99
- at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
100
-
101
- at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 
7
+ >--------- beginning of crash
8
+
9
+ E/AndroidRuntime: FATAL EXCEPTION: main
10
+
11
+ Process: com.list, PID: 2415
12
+
13
+ java.lang.RuntimeException: Unable to start activity ComponentInfo{com.list
14
+
15
+ com.list.SubActivity}: java.lang.NullPointerException: Attempt to read from null array
16
+
17
+ at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
18
+
19
+ at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
20
+
21
+ at android.app.ActivityThread.-wrap12(ActivityThread.java)
22
+
23
+ at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
24
+
25
+ at android.os.Handler.dispatchMessage(Handler.java:102)
26
+
27
+ at android.os.Looper.loop(Looper.java:154)
28
+
29
+ at android.app.ActivityThread.main(ActivityThread.java:6077)
30
+
31
+ at java.lang.reflect.Method.invoke(Native Method)
32
+
33
+ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
34
+
35
+ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
36
+
37
+ Caused by: java.lang.NullPointerException: Attempt to read from null array
38
+
39
+ at com.list.SubActivity.onCreate(SubActivity.java:86)
40
+
41
+ at android.app.Activity.performCreate(Activity.java:6664)
42
+
43
+ at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
44
+
45
+ at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
46
+
47
+ at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
48
+
49
+ at android.app.ActivityThread.-wrap12(ActivityThread.java) 
50
+
51
+ at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
52
+
53
+ at android.os.Handler.dispatchMessage(Handler.java:102) 
54
+
55
+ at android.os.Looper.loop(Looper.java:154) 
56
+
57
+ at android.app.ActivityThread.main(ActivityThread.java:6077) 
58
+
59
+ at java.lang.reflect.Method.invoke(Native Method) 
60
+
61
+ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
62
+
63
+ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 
64
+
65
+ Application terminated.
66
+
67
+
102
68
 
103
69
 
104
70
 

5

sub\.Activity内のコードを一部変更＆エラー内容の追記

2017/02/06 10:09

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
@@ -102,7 +102,9 @@
102
102
 
103
103
 
104
104
 
105
- というエラーで落ちてしまいます。エラー内容は配列がnullだといってるのは分かるのですが対処法が分かりません。
105
+ というエラーで落ちてしまいます。
106
+
107
+ 対処法が分かりません。
106
108
 
107
109
  どのようにすればいいかご教授お願いします。
108
110
 
@@ -246,7 +248,9 @@
246
248
 
247
249
  Intent intent = getIntent();
248
250
 
249
- id = intent.getIntExtra("ID", 0);
251
+ Long num = intent.getLongExtra("ID", 0);
252
+
253
+ Integer id = new Integer(num.toString());
250
254
 
251
255
 
252
256
 

4

xmlを削除

2017/02/06 09:46

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
File without changes

3

エラー内容の追記

2017/02/06 08:00

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
@@ -4,7 +4,101 @@
4
4
 
5
5
  クリックすると
6
6
 
7
+ > W/Bundle: Key ID expected Integer but value was a java.lang.Long.
8
+
9
+ The default value 1 was returned. W/Bundle: Attempt to cast generated internal exception:
10
+
11
+ java.lang.ClassCastException: java.lang.Long cannot be cast to
12
+
13
+ java.lang.Integer
14
+
15
+ at android.os.BaseBundle.getInt(BaseBundle.java:873)
16
+
17
+ at android.content.Intent.getIntExtra(Intent.java:6146)
18
+
19
+ at com.list.SubActivity.onCreate(SubActivity.java:63)
20
+
21
+ at android.app.Activity.performCreate(Activity.java:6664)
22
+
23
+ at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
24
+
25
+ at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
26
+
27
+ at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
28
+
29
+ at android.app.ActivityThread.-wrap12(ActivityThread.java)
30
+
31
+ at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
32
+
33
+ at android.os.Handler.dispatchMessage(Handler.java:102)
34
+
35
+ at android.os.Looper.loop(Looper.java:154)
36
+
37
+ at android.app.ActivityThread.main(ActivityThread.java:6077)
38
+
39
+ at java.lang.reflect.Method.invoke(Native Method)
40
+
41
+ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
42
+
43
+ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) D/AndroidRuntime: Shutting down VM E/AndroidRuntime: FATAL EXCEPTION: main
44
+
45
+ Process: com.list, PID: 2414
46
+
47
+ java.lang.RuntimeException: Unable to start activity
48
+
49
+ ComponentInfo{com.list/com.list.SubActivity}:
50
+
7
- > java.lang.NullPointerException: Attempt to read from null array
51
+ java.lang.NullPointerException: Attempt to read from null array
52
+
53
+ at android.app.ActivityThread.performLaunchActivity(ActivityThread.
54
+
55
+ java:2646)
56
+
57
+ at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
58
+
59
+ at android.app.ActivityThread.-wrap12(ActivityThread.java)
60
+
61
+ at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
62
+
63
+ at android.os.Handler.dispatchMessage(Handler.java:102)
64
+
65
+ at android.os.Looper.loop(Looper.java:154)
66
+
67
+ at android.app.ActivityThread.main(ActivityThread.java:6077)
68
+
69
+ at java.lang.reflect.Method.invoke(Native Method)
70
+
71
+ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
72
+
73
+ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
74
+
75
+ Caused by: java.lang.NullPointerException: Attempt to read from null array
76
+
77
+ at com.list.SubActivity.onCreate(SubActivity.java:86)
78
+
79
+ at android.app.Activity.performCreate(Activity.java:6664)
80
+
81
+ at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
82
+
83
+ at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
84
+
85
+ at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
86
+
87
+ at android.app.ActivityThread.-wrap12(ActivityThread.java) 
88
+
89
+ at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
90
+
91
+ at android.os.Handler.dispatchMessage(Handler.java:102) 
92
+
93
+ at android.os.Looper.loop(Looper.java:154) 
94
+
95
+ at android.app.ActivityThread.main(ActivityThread.java:6077) 
96
+
97
+ at java.lang.reflect.Method.invoke(Native Method) 
98
+
99
+ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) 
100
+
101
+ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 
8
102
 
9
103
 
10
104
 
@@ -168,55 +262,13 @@
168
262
 
169
263
  }
170
264
 
171
- /*public void requestData(String uri) {
172
-
173
- StringRequest request = new StringRequest(uri,
174
-
175
- new Response.Listener<String>(){
176
-
177
- @Override
178
-
179
- public void onResponse(String response) {
180
-
181
- sList = jsonParser.parseData(response);
182
-
183
- Adapter adapter = new Adapter(SubActivity.this, sList);
184
-
185
- lv.setAdapter(adapter);
186
-
187
- }
188
-
189
- },
190
-
191
- //エラー
192
-
193
- new Response.ErrorListener() {
194
-
195
- @Override
196
-
197
- public void onErrorResponse(VolleyError error) {
198
-
199
- Toast.makeText(SubActivity.this, error.getMessage().toString(), Toast.LENGTH_SHORT).show();
200
-
201
- }
202
-
203
- });
204
-
205
- RequestQueue queue = Volley.newRequestQueue(this);
206
-
207
- queue.add(request);
208
-
209
- }
210
-
211
- }*/
212
-
213
265
  ```
214
266
 
215
267
  ```Java
216
268
 
217
269
  public class Adapter extends ArrayAdapter<json> {
218
270
 
219
- public static json[] json; //追加
271
+ public static json[] json;
220
272
 
221
273
  private Context context;
222
274
 
@@ -296,7 +348,7 @@
296
348
 
297
349
  final json s = sList.get(position);
298
350
 
299
- final jp.ac.dhu.list.Adapter.ViewHolder holder;
351
+ final com.list.Adapter.ViewHolder holder;
300
352
 
301
353
  if(convertView == null) {
302
354
 
@@ -304,7 +356,7 @@
304
356
 
305
357
  //convertView = inflater.inflate(R.layout.list_item_detail,null);
306
358
 
307
- holder = new jp.ac.dhu.list.Adapter.ViewHolder();
359
+ holder = new com.list.Adapter.ViewHolder();
308
360
 
309
361
  holder._name = (TextView) convertView.findViewById(R.id.tvname);
310
362
 
@@ -318,7 +370,7 @@
318
370
 
319
371
  else {
320
372
 
321
- holder = (jp.ac.dhu.list.Adapter.ViewHolder) convertView.getTag();
373
+ holder = (com.list.Adapter.ViewHolder) convertView.getTag();
322
374
 
323
375
  }
324
376
 
@@ -333,127 +385,3 @@
333
385
  holder._imgUrl = (ImageView) convertView.findViewById(R.id.imgUrl);
334
386
 
335
387
  ```
336
-
337
- ```xml
338
-
339
- activity_main
340
-
341
- <?xml version="1.0" encoding="utf-8"?>
342
-
343
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
344
-
345
- xmlns:tools="http://schemas.android.com/tools"
346
-
347
- android:layout_width="match_parent"
348
-
349
- android:layout_height="match_parent"
350
-
351
- tools:context="jp.ac.dhu.list.MainActivity">
352
-
353
- <ListView
354
-
355
- android:layout_width="wrap_content"
356
-
357
- android:layout_height="wrap_content"
358
-
359
- android:id="@+id/listView"
360
-
361
- android:layout_alignParentTop="true"
362
-
363
- android:layout_alignParentLeft="true"
364
-
365
- android:layout_alignParentStart="true" />
366
-
367
- </RelativeLayout>
368
-
369
- ```
370
-
371
- ```xml
372
-
373
- activity_sub
374
-
375
- <?xml version="1.0" encoding="utf-8"?>
376
-
377
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
378
-
379
- xmlns:tools="http://schemas.android.com/tools"
380
-
381
- android:layout_width="match_parent"
382
-
383
- android:layout_height="match_parent"
384
-
385
- tools:context="jp.ac.dhu.list.SubActivity">
386
-
387
- <ImageView
388
-
389
- android:layout_width="70dp"
390
-
391
- android:layout_height="70dp"
392
-
393
- android:layout_marginLeft="12dp"
394
-
395
- android:layout_marginTop="14dp"
396
-
397
- android:id="@+id/imgUrl"
398
-
399
- android:paddingBottom="10dp"
400
-
401
- android:layout_alignParentTop="true"
402
-
403
- android:layout_alignParentLeft="true"
404
-
405
- android:layout_alignParentStart="true" />
406
-
407
- <TextView
408
-
409
- android:layout_width="match_parent"
410
-
411
- android:layout_height="wrap_content"
412
-
413
- android:textSize="18sp"
414
-
415
- android:id="@+id/tvname"
416
-
417
- android:paddingLeft="4dp"
418
-
419
- android:paddingRight="5dp"
420
-
421
- android:layout_alignTop="@+id/imgUrl"
422
-
423
- android:layout_toRightOf="@+id/imgUrl"
424
-
425
- android:layout_toEndOf="@+id/imgUrl" />
426
-
427
- <TextView
428
-
429
- android:layout_width="wrap_content"
430
-
431
- android:layout_height="wrap_content"
432
-
433
- android:text="Small Text"
434
-
435
- android:lines="1"
436
-
437
- android:ellipsize="end"
438
-
439
- android:paddingLeft="4dp"
440
-
441
- android:paddingRight="5dp"
442
-
443
- android:textSize="12sp"
444
-
445
- android:id="@+id/tvdescription"
446
-
447
- android:layout_below="@+id/tvname"
448
-
449
- android:layout_alignLeft="@+id/tvname"
450
-
451
- android:layout_alignStart="@+id/tvname"
452
-
453
- android:layout_alignParentRight="true"
454
-
455
- android:layout_alignParentEnd="true" />
456
-
457
- </RelativeLayout>
458
-
459
- ```

2

エラー内容の追記

2017/02/06 07:54

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
@@ -1,11 +1,19 @@
1
1
  ###ListViewでの遷移について
2
2
 
3
- Web上のJson形式のファイルを受け取ってそれをlistviewで表示するアプリを作りました。次に遷移するようにしようとしたところ値は持っていってるはずなのですが、表示などができません。どうすればいいかご教授お願いします。
3
+ Web上のJson形式のファイルを受け取ってそれをlistviewで表示するアプリを作りました。次に遷移するようにしようとしたところ値は持っていってるはずなのですが、
4
+
5
+ クリックすると
6
+
7
+ > java.lang.NullPointerException: Attempt to read from null array
8
+
9
+
10
+
11
+ というエラーで落ちてしまいます。エラー内容は配列がnullだといってるのは分かるのですが対処法が分かりません。
12
+
13
+ どのようにすればいいかご教授お願いします。
4
14
 
5
15
  Main.ActivityのonitemclickのところとSub.Activityです。
6
16
 
7
- 文字数の都合上sample_list_template.xmlは削除しました。
8
-
9
17
 
10
18
 
11
19
  ```Java

1

Sub\.Activityの受け取り部分を書き換えました。

2017/02/05 18:49

投稿

退会済みユーザー
test CHANGED
File without changes
test CHANGED
@@ -140,51 +140,27 @@
140
140
 
141
141
  List<json> sList;
142
142
 
143
- //lv = (ListView) findViewById(R.id.listView);
143
+
144
-
145
- //requestData(uri);
144
+
146
-
147
- //MainActivityから受け取る
148
-
149
- Intent intent = getIntent();
145
+ Intent intent = getIntent();
150
-
151
- /*Long vacation = intent.getLongExtra("ID", 0);
152
-
153
- Integer id = new Integer(vacation.toString());*/
154
146
 
155
147
  id = intent.getIntExtra("ID", 0);
156
148
 
149
+
150
+
157
- /*imgUrl = getIntent().getStringExtra("IMGURL");
151
+ imageView =(ImageView) findViewById(R.id.imgUrl);
158
-
159
- description = getIntent().getStringExtra("DESCRIPTION");*/
152
+
160
-
161
- //String selectedname = intent.getStringExtra("Name");
162
-
163
- //String selectedimgUrl = intent.getStringExtra("ImgUrl");
164
-
165
- //String selecteddescription = intent.getStringExtra("Description");
166
-
167
- textView = (TextView)findViewById(R.id.tvname);
153
+ textView = (TextView) findViewById(R.id.tvname);
168
-
169
- //textView.setText(tvname);
154
+
170
-
171
- imageView = (ImageView)findViewById(R.id.imgUrl);
155
+
172
-
173
- //imageView.setImageResource();
156
+
174
-
175
- textView2 = (TextView)findViewById(R.id.tvdescription);
176
-
177
- //textView.setText(id);
178
-
179
- textView.setText(Adapter.json[id].getName());
157
+ textView.setText(Adapter.json[id].getName());
180
-
181
- //imageView.set
158
+
182
-
183
- textView2.setText(Adapter.json[id].getDescription());
159
+ Picasso.with(context).load(Adapter.json[id].getImgUrl()).into(imageView);
184
-
160
+
185
- }
161
+ }
186
-
162
+
187
- public void requestData(String uri) {
163
+ /*public void requestData(String uri) {
188
164
 
189
165
  StringRequest request = new StringRequest(uri,
190
166
 
@@ -224,7 +200,7 @@
224
200
 
225
201
  }
226
202
 
227
- }
203
+ }*/
228
204
 
229
205
  ```
230
206