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トップに関する質問androidstudioでの問題が解決しません

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4

エラーメッセージの修正

2017/02/03 01:27

投稿

rain_sun
rain_sun

スコア12

title CHANGED
File without changes
body CHANGED
@@ -5,7 +5,54 @@
5
5
  ###発生している問題・エラーメッセージ
6
6
 
7
7
  ```
8
+ E/AndroidRuntime: FATAL EXCEPTION: main
9
+ Process: com.example.innovation.f_featnote, PID: 2899
8
- java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference
10
+ java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference
11
+ at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:394)
12
+ at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
13
+ at android.widget.AbsListView.obtainView(AbsListView.java:2344)
14
+ at android.widget.ListView.makeAndAddView(ListView.java:1864)
15
+ at android.widget.ListView.fillDown(ListView.java:698)
16
+ at android.widget.ListView.fillFromTop(ListView.java:759)
17
+ at android.widget.ListView.layoutChildren(ListView.java:1673)
18
+ at android.widget.AbsListView.onLayout(AbsListView.java:2148)
19
+ at android.view.View.layout(View.java:15596)
20
+ at android.view.ViewGroup.layout(ViewGroup.java:4966)
21
+ at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
22
+ at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
23
+ at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
24
+ at android.view.View.layout(View.java:15596)
25
+ at android.view.ViewGroup.layout(ViewGroup.java:4966)
26
+ at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
27
+ at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
28
+ at android.view.View.layout(View.java:15596)
29
+ at android.view.ViewGroup.layout(ViewGroup.java:4966)
30
+ at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
31
+ at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
32
+ at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
33
+ at android.view.View.layout(View.java:15596)
34
+ at android.view.ViewGroup.layout(ViewGroup.java:4966)
35
+ at android.widget.FrameLayout.layoutChildren(FrameLayout.java:573)
36
+ at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
37
+ at android.view.View.layout(View.java:15596)
38
+ at android.view.ViewGroup.layout(ViewGroup.java:4966)
39
+ at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2072)
40
+ at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1829)
41
+ at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
42
+ at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779)
43
+ at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
44
+ at android.view.Choreographer.doCallbacks(Choreographer.java:580)
45
+ at android.view.Choreographer.doFrame(Choreographer.java:550)
46
+ at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
47
+ at android.os.Handler.handleCallback(Handler.java:739)
48
+ at android.os.Handler.dispatchMessage(Handler.java:95)
49
+ at android.os.Looper.loop(Looper.java:135)
50
+ at android.app.ActivityThread.main(ActivityThread.java:5221)
51
+ at java.lang.reflect.Method.invoke(Native Method)
52
+ at java.lang.reflect.Method.invoke(Method.java:372)
53
+ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
54
+ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
55
+
9
56
  ```
10
57
 
11
58
  ###java

3

修正

2017/02/03 01:27

投稿

rain_sun
rain_sun

スコア12

title CHANGED
File without changes
body CHANGED
@@ -12,57 +12,92 @@
12
12
  ```
13
13
  package com.example.innovation.f_featnote;
14
14
 
15
+
15
16
  import android.app.Activity;
17
+
16
18
  import android.app.ListActivity;
19
+
17
20
  import android.content.Context;
21
+
18
22
  import android.content.Intent;
23
+
19
24
  import android.database.Cursor;
25
+
20
26
  import android.database.sqlite.SQLiteDatabase;
27
+
21
28
  import android.database.sqlite.SQLiteException;
29
+
22
30
  import android.database.sqlite.SQLiteOpenHelper;
31
+
23
32
  import android.os.Bundle;
33
+
24
34
  import android.provider.ContactsContract;
35
+
25
36
  import android.util.Log;
37
+
26
38
  import android.view.LayoutInflater;
39
+
27
40
  import android.view.View;
41
+
28
42
  import android.view.ViewGroup;
43
+
29
44
  import android.widget.AdapterView;
45
+
30
46
  import android.widget.ArrayAdapter;
47
+
31
48
  import android.widget.BaseAdapter;
49
+
32
50
  import android.widget.Button;
51
+
33
52
  import android.widget.ListView;
53
+
34
54
  import android.widget.TextView;
55
+
35
56
  import android.widget.Toast;
36
57
 
58
+
37
59
  import com.example.innovation.f_featnote.SubOpenHelper;
60
+
38
61
  import com.example.innovation.f_featnote.MainActivity;
39
62
 
63
+
40
64
  import java.util.ArrayList;
65
+
41
66
  import java.util.Arrays;
67
+
42
68
  import java.util.List;
43
69
 
44
- /**
45
- * Created by Innovation on 2017/01/26.
46
- */
47
70
 
48
71
  public class SqlLoad extends Activity {
72
+
49
73
  ListView lv;
74
+
50
75
  static String[][] list;
76
+
51
77
  static String[] Did = new String[2];
78
+
52
79
  static long id_;
80
+
53
81
  static boolean[] flg;
82
+
54
83
  static String[] Data;
84
+
55
85
  private final int WC = ViewGroup.LayoutParams.WRAP_CONTENT;
56
86
 
87
+
57
88
  @Override
58
89
  protected void onCreate(Bundle savedInstanceState) {
90
+
59
91
  super.onCreate(savedInstanceState);
92
+
60
93
  setContentView(R.layout.sql_load);
94
+
61
95
  // final boolean[] flg = new boolean[1];
62
96
 
63
97
 
64
98
 
65
99
 
100
+
66
101
  Main();
67
102
  }
68
103
 
@@ -70,25 +105,42 @@
70
105
 
71
106
  Data = SQLDataGet();
72
107
  // lv = new ListView(this);
108
+
73
109
  // ArrayList<String> Data = new ArrayList<>(Arrays.asList(SQLDataGet()));
110
+
74
111
  lv = (ListView)findViewById(R.id.sql_load_main);
112
+
75
- ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_expandable_list_item_1, Data);
113
+ ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
114
+ android.R.layout.simple_expandable_list_item_1, Data);
115
+
76
116
  lv.setAdapter(adapter);//リスト表示
117
+
77
118
  // setContentView(lv,new ViewGroup.LayoutParams(WC,WC));
78
119
 
120
+
79
121
  lv.setOnItemClickListener(new AdapterView.OnItemClickListener(){
80
122
  @Override
81
123
  public void onItemClick(AdapterView<?> parent,View view,int position,long id){
124
+
82
125
  // ListView listView = (ListView) parent;
126
+
83
127
  // String item = (String)listView.getItemAtPosition(position);
128
+
84
129
  Log.d("id",""+id);
130
+
85
131
  id_ = id;
86
132
  SQLDContentGet();
133
+
87
134
  SQLDataSet();
135
+
88
136
  finish();
137
+
89
138
  // Toast.makeText(getApplicationContext(),item + "clicked",Toast.LENGTH_LONG).show();
139
+
90
140
  }
141
+
91
142
  });
143
+
92
144
  }
93
145
 
94
146
 
@@ -96,48 +148,87 @@
96
148
 
97
149
 
98
150
  public String[] SQLDataGet(){
151
+
99
152
  MainActivity main = new MainActivity();
153
+
100
154
  Context con = this;
155
+
101
156
  List ls = null;
157
+
102
158
  SQLiteDatabase sdb = main.SQLopen(con.getApplicationContext());//MainActivity参照
159
+
103
160
  final String[] columns = new String[]{"title","content","date"};//列名
161
+
104
162
  String where = null;//条件
163
+
105
164
  String[] Args = new String[]{""};//？の置き換え
165
+
106
166
  Cursor c = sdb.query("MemoContents", columns,where, null, null, null, null);
167
+
107
168
  int startPostion = c.getPosition();
169
+
108
170
  c.moveToFirst();
171
+
109
172
  list = new String[c.getCount()][columns.length];
173
+
110
174
  String[] Dlist = new String[c.getCount()];
175
+
111
176
  for (int i = 0; i< list[0].length-1; i++){
177
+
112
178
  for (int j = 0; j < list[1].length; j++){
179
+
113
180
  list[i][j] = c.getString(j);
181
+
114
182
  Log.d(i+"-"+j,list[i][j]);//デバッグ
183
+
115
184
  Dlist[i] = list[i][0];
185
+
116
186
  }
187
+
117
188
  c.moveToNext();
189
+
118
190
  }
191
+
119
192
  c.moveToPosition(startPostion);
120
193
 
121
194
  // finish();
195
+
122
196
  return Dlist;
123
197
  }
124
198
 
125
199
  public void SQLDContentGet(){
200
+
126
201
  Did[0] = list[(int)id_][0];
202
+
127
203
  Did[1] = list[(int)id_][1];
204
+
128
205
  }
129
206
 
130
207
  public void SQLDataSet(){
208
+
131
209
  Intent data = new Intent();
210
+
132
211
  Bundle bundle = new Bundle();
212
+
133
213
  data.putExtra("key.data",Did);
214
+
134
215
  data.putExtras(bundle);
216
+
217
+
135
218
  setResult(RESULT_OK,data);
219
+
136
220
  finish();
221
+
137
222
  }
138
223
 
139
224
  @Override
225
+
140
226
  public void finish() {
227
+
141
228
  super.finish();
229
+
142
230
  }
231
+
232
+ }
233
+
143
- }```
234
+ ```

2

微修正

2017/02/02 09:41

投稿

rain_sun
rain_sun

スコア12

title CHANGED
File without changes
body CHANGED
@@ -13,129 +13,80 @@
13
13
  package com.example.innovation.f_featnote;
14
14
 
15
15
  import android.app.Activity;
16
-
17
16
  import android.app.ListActivity;
18
-
19
17
  import android.content.Context;
20
-
21
18
  import android.content.Intent;
22
-
23
19
  import android.database.Cursor;
24
-
25
20
  import android.database.sqlite.SQLiteDatabase;
26
-
27
21
  import android.database.sqlite.SQLiteException;
28
-
29
22
  import android.database.sqlite.SQLiteOpenHelper;
30
-
31
23
  import android.os.Bundle;
32
-
33
24
  import android.provider.ContactsContract;
34
-
35
25
  import android.util.Log;
36
-
37
26
  import android.view.LayoutInflater;
38
-
39
27
  import android.view.View;
40
-
41
28
  import android.view.ViewGroup;
42
-
43
29
  import android.widget.AdapterView;
44
-
45
30
  import android.widget.ArrayAdapter;
46
-
47
31
  import android.widget.BaseAdapter;
48
-
49
32
  import android.widget.Button;
50
-
51
33
  import android.widget.ListView;
52
-
53
34
  import android.widget.TextView;
54
-
55
35
  import android.widget.Toast;
56
36
 
57
37
  import com.example.innovation.f_featnote.SubOpenHelper;
58
-
59
38
  import com.example.innovation.f_featnote.MainActivity;
60
39
 
61
40
  import java.util.ArrayList;
62
-
63
41
  import java.util.Arrays;
64
-
65
42
  import java.util.List;
66
43
 
44
+ /**
45
+ * Created by Innovation on 2017/01/26.
46
+ */
47
+
67
48
  public class SqlLoad extends Activity {
68
-
69
49
  ListView lv;
70
-
71
- static String[][] list;
50
+ static String[][] list;
72
-
73
51
  static String[] Did = new String[2];
74
-
75
52
  static long id_;
76
-
77
53
  static boolean[] flg;
78
-
79
54
  static String[] Data;
80
-
81
55
  private final int WC = ViewGroup.LayoutParams.WRAP_CONTENT;
82
56
 
83
57
  @Override
84
58
  protected void onCreate(Bundle savedInstanceState) {
85
-
86
59
  super.onCreate(savedInstanceState);
87
-
88
60
  setContentView(R.layout.sql_load);
61
+ // final boolean[] flg = new boolean[1];
89
62
 
90
- // final boolean[] flg = new boolean[1];
91
63
 
92
64
 
93
65
 
94
-
95
66
  Main();
96
67
  }
97
68
 
98
69
  public void Main(){
99
70
 
100
71
  Data = SQLDataGet();
101
-
102
72
  // lv = new ListView(this);
103
-
104
73
  // ArrayList<String> Data = new ArrayList<>(Arrays.asList(SQLDataGet()));
105
-
106
74
  lv = (ListView)findViewById(R.id.sql_load_main);
107
-
108
- ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
75
+ ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_expandable_list_item_1, Data);
109
-
110
- android.R.layout.simple_expandable_list_item_1, Data);
111
-
112
76
  lv.setAdapter(adapter);//リスト表示
113
-
114
77
  // setContentView(lv,new ViewGroup.LayoutParams(WC,WC));
115
78
 
116
-
117
79
  lv.setOnItemClickListener(new AdapterView.OnItemClickListener(){
118
-
119
80
  @Override
120
-
121
81
  public void onItemClick(AdapterView<?> parent,View view,int position,long id){
122
-
123
82
  // ListView listView = (ListView) parent;
124
-
125
83
  // String item = (String)listView.getItemAtPosition(position);
126
-
127
84
  Log.d("id",""+id);
128
-
129
85
  id_ = id;
130
-
131
86
  SQLDContentGet();
132
-
133
87
  SQLDataSet();
134
-
135
88
  finish();
136
-
137
89
  // Toast.makeText(getApplicationContext(),item + "clicked",Toast.LENGTH_LONG).show();
138
-
139
90
  }
140
91
  });
141
92
  }
@@ -145,87 +96,48 @@
145
96
 
146
97
 
147
98
  public String[] SQLDataGet(){
148
-
149
99
  MainActivity main = new MainActivity();
150
-
151
100
  Context con = this;
152
-
153
101
  List ls = null;
154
-
155
102
  SQLiteDatabase sdb = main.SQLopen(con.getApplicationContext());//MainActivity参照
156
-
157
103
  final String[] columns = new String[]{"title","content","date"};//列名
158
-
159
104
  String where = null;//条件
160
-
161
105
  String[] Args = new String[]{""};//？の置き換え
162
-
163
106
  Cursor c = sdb.query("MemoContents", columns,where, null, null, null, null);
164
-
165
107
  int startPostion = c.getPosition();
166
-
167
108
  c.moveToFirst();
168
-
169
109
  list = new String[c.getCount()][columns.length];
170
-
171
110
  String[] Dlist = new String[c.getCount()];
172
-
173
111
  for (int i = 0; i< list[0].length-1; i++){
174
-
175
112
  for (int j = 0; j < list[1].length; j++){
176
-
177
113
  list[i][j] = c.getString(j);
178
-
179
114
  Log.d(i+"-"+j,list[i][j]);//デバッグ
180
-
181
115
  Dlist[i] = list[i][0];
182
-
183
116
  }
184
-
185
117
  c.moveToNext();
186
-
187
118
  }
188
-
189
119
  c.moveToPosition(startPostion);
190
120
 
191
121
  // finish();
192
-
193
122
  return Dlist;
194
-
195
123
  }
196
124
 
197
125
  public void SQLDContentGet(){
198
-
199
126
  Did[0] = list[(int)id_][0];
200
-
201
127
  Did[1] = list[(int)id_][1];
202
-
203
128
  }
204
129
 
205
130
  public void SQLDataSet(){
206
-
207
131
  Intent data = new Intent();
208
-
209
132
  Bundle bundle = new Bundle();
210
-
211
133
  data.putExtra("key.data",Did);
212
-
213
134
  data.putExtras(bundle);
214
-
215
135
  setResult(RESULT_OK,data);
216
-
217
136
  finish();
218
-
219
137
  }
220
138
 
221
139
  @Override
222
-
223
140
  public void finish() {
224
-
225
141
  super.finish();
226
-
227
142
  }
228
-
229
- }
230
-
231
- ```
143
+ }```

1

すみません　修正しました

2017/02/02 09:39

投稿

rain_sun
rain_sun

スコア12

title CHANGED
File without changes
body CHANGED
@@ -8,7 +8,8 @@
8
8
  java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference
9
9
  ```
10
10
 
11
- ###該当のソース```java
11
+ ###java
12
+ ```
12
13
  package com.example.innovation.f_featnote;
13
14
 
14
15
  import android.app.Activity;