質問編集履歴
1
コードの追加
test
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File without changes
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test
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@@ -111,3 +111,91 @@
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111
111
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checkBox2がcheckされてbuttonを押したときに変数をmainactivityに持ってくるというプログラムを書いているのですが、buttonを押すと落ちてしまいます。
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112
112
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113
113
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どう直せばよいのでしょうか？
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114
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115
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116
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117
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```ここに言語を入力
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118
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119
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import android.app.Application;
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120
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121
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122
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123
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public class MyApp extends Application {
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124
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125
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126
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127
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private String testString = "default";
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128
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129
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130
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131
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@Override
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132
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133
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public void onCreate() {
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134
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135
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136
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137
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}
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138
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139
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140
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141
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public String getTestString() {
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142
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return testString;
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144
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145
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}
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146
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147
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public void setTestString(String str) {
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148
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149
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testString = str;
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150
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151
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}
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152
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153
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}
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154
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155
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```
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156
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157
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158
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159
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```ここに言語を入力
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160
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161
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import android.os.Bundle;
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162
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163
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import android.support.v7.app.AppCompatActivity;
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164
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165
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import android.widget.TextView;
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166
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167
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168
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169
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public class mainactivity extends AppCompatActivity {
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170
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171
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172
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173
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@Override
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174
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175
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protected void onCreate(Bundle savedInstanceState) {
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176
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177
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super.onCreate(savedInstanceState);
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178
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179
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setContentView(R.layout.activity_sub);
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180
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181
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182
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183
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MyApp myApp = (MyApp) this.getApplication();
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184
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185
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String str = myApp.getTestString();
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186
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187
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188
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TextView TextView2 = (TextView)findViewById(R.id.TextView2);
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190
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191
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TextView2.setText(str);
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194
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195
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196
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197
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}
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198
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199
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}
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200
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201
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```
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