質問編集履歴
3
コメントの追記
title
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File without changes
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body
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@@ -139,4 +139,33 @@
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139
139
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</androidx.constraintlayout.widget.ConstraintLayout>
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140
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```
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141
141
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142
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-
---
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142
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+
---
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143
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+
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144
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+
♯コメントに対する追記 何度も申し訳ございません。
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145
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+
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146
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+
```
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147
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+
2020-12-14 21:11:28.702 21871-21896/com.example.oto E/eglCodecCommon: GoldfishAddressSpaceHostMemoryAllocator: ioctl_ping failed for device_type=5, ret=-1
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148
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+
2020-12-14 21:11:28.928 21871-21896/com.example.oto D/EGL_emulation: eglMakeCurrent: 0xe7e90700: ver 2 0 (tinfo 0xefb625c0)
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149
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+
2020-12-14 21:11:37.371 21871-21871/com.example.oto D/AndroidRuntime: Shutting down VM
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150
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2020-12-14 21:11:37.373 21871-21871/com.example.oto E/AndroidRuntime: FATAL EXCEPTION: main
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151
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+
Process: com.example.oto, PID: 21871
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152
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+
kotlin.UninitializedPropertyAccessException: lateinit property mediaPlayer has not been initialized
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153
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+
at com.example.oto.MainActivity.stopMusic(MainActivity.kt:42)
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154
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+
at com.example.oto.MainActivity$onCreate$2.onClick(MainActivity.kt:31)
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155
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+
at android.view.View.performClick(View.java:6597)
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156
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+
at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:992)
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157
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+
at android.view.View.performClickInternal(View.java:6574)
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158
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+
at android.view.View.access$3100(View.java:778)
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159
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+
at android.view.View$PerformClick.run(View.java:25885)
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160
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+
at android.os.Handler.handleCallback(Handler.java:873)
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161
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+
at android.os.Handler.dispatchMessage(Handler.java:99)
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162
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+
at android.os.Looper.loop(Looper.java:193)
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163
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+
at android.app.ActivityThread.main(ActivityThread.java:6669)
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164
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+
at java.lang.reflect.Method.invoke(Native Method)
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165
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+
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
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166
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+
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
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167
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+
2020-12-14 21:11:37.395 21871-21871/com.example.oto I/Process: Sending signal. PID: 21871 SIG: 9
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168
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+
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169
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+
```
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170
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+
#]
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171
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+
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2
コメントへの追記
title
CHANGED
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File without changes
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body
CHANGED
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@@ -109,4 +109,34 @@
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109
109
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110
110
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```
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111
111
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#写真
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112
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-
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112
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+
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113
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+
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114
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+
♯コメントに対する追記 activity_main
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115
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+
```kotlin
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116
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+
<?xml version="1.0" encoding="utf-8"?>
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117
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+
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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118
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+
xmlns:app="http://schemas.android.com/apk/res-auto"
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119
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+
xmlns:tools="http://schemas.android.com/tools"
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120
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+
android:layout_width="match_parent"
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121
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+
android:layout_height="match_parent"
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122
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+
tools:context=".MainActivity">
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123
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+
|
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124
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+
<Button
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|
125
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+
android:id="@+id/button"
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126
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+
android:layout_width="wrap_content"
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127
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+
android:layout_height="wrap_content"
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128
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+
android:text="@string/start"
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129
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+
tools:layout_editor_absoluteX="143dp"
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130
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+
tools:layout_editor_absoluteY="119dp" />
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131
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+
|
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132
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+
<Button
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133
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+
android:id="@+id/button2"
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134
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+
android:layout_width="wrap_content"
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135
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+
android:layout_height="wrap_content"
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136
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+
android:text="@string/stop"
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137
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+
tools:layout_editor_absoluteX="138dp"
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138
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+
tools:layout_editor_absoluteY="363dp" />
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139
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+
</androidx.constraintlayout.widget.ConstraintLayout>
|
|
140
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+
```
|
|
141
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+
|
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142
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+
---
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1
コメントに対する追記
title
CHANGED
|
File without changes
|
body
CHANGED
|
@@ -70,4 +70,43 @@
|
|
|
70
70
|
```
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|
71
71
|
|
|
72
72
|
#補足情報
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|
73
|
-
androidstudio4.1
|
|
73
|
+
androidstudio4.1
|
|
74
|
+
|
|
75
|
+
#コメントに対する追記となります
|
|
76
|
+
```
|
|
77
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+
2020-12-14 19:51:11.901 19828-19828/com.example.oto E/AndroidRuntime: FATAL EXCEPTION: main
|
|
78
|
+
Process: com.example.oto, PID: 19828
|
|
79
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+
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.oto/com.example.oto.MainActivity}: java.lang.NullPointerException: findViewById(R.id.start_music) must not be null
|
|
80
|
+
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
|
|
81
|
+
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
|
|
82
|
+
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
|
|
83
|
+
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
|
|
84
|
+
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
|
|
85
|
+
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
|
|
86
|
+
at android.os.Handler.dispatchMessage(Handler.java:106)
|
|
87
|
+
at android.os.Looper.loop(Looper.java:193)
|
|
88
|
+
at android.app.ActivityThread.main(ActivityThread.java:6669)
|
|
89
|
+
at java.lang.reflect.Method.invoke(Native Method)
|
|
90
|
+
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
|
|
91
|
+
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
|
|
92
|
+
Caused by: java.lang.NullPointerException: findViewById(R.id.start_music) must not be null
|
|
93
|
+
at com.example.oto.MainActivity.onCreate(MainActivity.kt:19)
|
|
94
|
+
at android.app.Activity.performCreate(Activity.java:7136)
|
|
95
|
+
at android.app.Activity.performCreate(Activity.java:7127)
|
|
96
|
+
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
|
|
97
|
+
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
|
|
98
|
+
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
|
|
99
|
+
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
|
|
100
|
+
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
|
|
101
|
+
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
|
|
102
|
+
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
|
|
103
|
+
at android.os.Handler.dispatchMessage(Handler.java:106)
|
|
104
|
+
at android.os.Looper.loop(Looper.java:193)
|
|
105
|
+
at android.app.ActivityThread.main(ActivityThread.java:6669)
|
|
106
|
+
at java.lang.reflect.Method.invoke(Native Method)
|
|
107
|
+
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
|
|
108
|
+
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
|
|
109
|
+
|
|
110
|
+
```
|
|
111
|
+
#写真
|
|
112
|
+
|