質問編集履歴
1
エラーメッセージを追記しました
test
CHANGED
|
File without changes
|
test
CHANGED
|
@@ -91,3 +91,99 @@
|
|
|
91
91
|
activity_main.xmlにただTextViewを置いておけば、エラーにはなりませんが
|
|
92
92
|
|
|
93
93
|
実行後は画面にそのテキスト文字は表示されていません。
|
|
94
|
+
|
|
95
|
+
|
|
96
|
+
|
|
97
|
+
|
|
98
|
+
|
|
99
|
+
2017/11/22追記
|
|
100
|
+
|
|
101
|
+
(teratailに不慣れなため、書き方、追記などが不適切であればご指摘ください)
|
|
102
|
+
|
|
103
|
+
keicha_hrsさんより助言をいただき、
|
|
104
|
+
|
|
105
|
+
エラー内容を見るためLogcatより確認してみました。
|
|
106
|
+
|
|
107
|
+
今回のエラーの大筋は【NullPointerException】ということが分かりました。
|
|
108
|
+
|
|
109
|
+
これがTextViewと関係があるという事でしょうか。
|
|
110
|
+
|
|
111
|
+
こちらでも、改めて調べてみます。
|
|
112
|
+
|
|
113
|
+
-----------------エラー内容--------------------------
|
|
114
|
+
|
|
115
|
+
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
|
|
116
|
+
|
|
117
|
+
at com.example.xxxx.chart_test_1.MainActivity$TestView.onDraw(MainActivity.java:119)
|
|
118
|
+
|
|
119
|
+
at android.view.View.draw(View.java:17185)
|
|
120
|
+
|
|
121
|
+
at android.view.View.updateDisplayListIfDirty(View.java:16167)
|
|
122
|
+
|
|
123
|
+
at android.view.View.draw(View.java:16951)
|
|
124
|
+
|
|
125
|
+
at android.view.ViewGroup.drawChild(ViewGroup.java:3727)
|
|
126
|
+
|
|
127
|
+
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3513)
|
|
128
|
+
|
|
129
|
+
at android.view.View.updateDisplayListIfDirty(View.java:16162)
|
|
130
|
+
|
|
131
|
+
at android.view.View.draw(View.java:16951)
|
|
132
|
+
|
|
133
|
+
at android.view.ViewGroup.drawChild(ViewGroup.java:3727)
|
|
134
|
+
|
|
135
|
+
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3513)
|
|
136
|
+
|
|
137
|
+
at android.view.View.updateDisplayListIfDirty(View.java:16162)
|
|
138
|
+
|
|
139
|
+
at android.view.View.draw(View.java:16951)
|
|
140
|
+
|
|
141
|
+
at android.view.ViewGroup.drawChild(ViewGroup.java:3727)
|
|
142
|
+
|
|
143
|
+
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3513)
|
|
144
|
+
|
|
145
|
+
at android.view.View.draw(View.java:17188)
|
|
146
|
+
|
|
147
|
+
at com.android.internal.policy.DecorView.draw(DecorView.java:753)
|
|
148
|
+
|
|
149
|
+
at android.view.View.updateDisplayListIfDirty(View.java:16167)
|
|
150
|
+
|
|
151
|
+
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:648)
|
|
152
|
+
|
|
153
|
+
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:654)
|
|
154
|
+
|
|
155
|
+
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:762)
|
|
156
|
+
|
|
157
|
+
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2800)
|
|
158
|
+
|
|
159
|
+
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2608)
|
|
160
|
+
|
|
161
|
+
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2215)
|
|
162
|
+
|
|
163
|
+
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1254)
|
|
164
|
+
|
|
165
|
+
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6337)
|
|
166
|
+
|
|
167
|
+
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874)
|
|
168
|
+
|
|
169
|
+
at android.view.Choreographer.doCallbacks(Choreographer.java:686)
|
|
170
|
+
|
|
171
|
+
at android.view.Choreographer.doFrame(Choreographer.java:621)
|
|
172
|
+
|
|
173
|
+
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860)
|
|
174
|
+
|
|
175
|
+
at android.os.Handler.handleCallback(Handler.java:751)
|
|
176
|
+
|
|
177
|
+
at android.os.Handler.dispatchMessage(Handler.java:95)
|
|
178
|
+
|
|
179
|
+
at android.os.Looper.loop(Looper.java:154)
|
|
180
|
+
|
|
181
|
+
at android.app.ActivityThread.main(ActivityThread.java:6119)
|
|
182
|
+
|
|
183
|
+
at java.lang.reflect.Method.invoke(Native Method)
|
|
184
|
+
|
|
185
|
+
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
|
|
186
|
+
|
|
187
|
+
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
|
|
188
|
+
|
|
189
|
+
-----------------ここまで--------------------------
|