如何在android中更新时选中复选框?
我有一个单选组,有两个单选按钮(自动投递和公司投递)。在申请表中,当用户选择任何一个单选按钮时。我得到单选按钮的文本,并使用此代码插入数据库 Form.java如何在android中更新时选中复选框?,android,radio-group,Android,Radio Group,我有一个单选组,有两个单选按钮(自动投递和公司投递)。在申请表中,当用户选择任何一个单选按钮时。我得到单选按钮的文本,并使用此代码插入数据库 Form.java radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup arg0, int arg1) {
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup arg0, int arg1) {
// TODO Auto-generated method stub
selectedId = radioGroup.getCheckedRadioButtonId();
// find the radiobutton by returned id
radioButton = (RadioButton) findViewById(selectedId);
if(radioButton.isChecked()){
OPTIONS=radioButton.getText().toString();
if(OPTIONS.equals("SelfDelivery")){
deliveryAddress.setVisibility(View.GONE);
deliveryEdit.setVisibility(View.GONE);
}else{
deliveryAddress.setVisibility(View.VISIBLE);
deliveryEdit.setVisibility(View.VISIBLE);
}
}
}
});
当用户想要编辑表单时,我正在创建一个新的屏幕来编辑和更新详细信息。通过使用代码
EditForm.java
final String ram=extras.getString(openHelper_ob.DELIVERY_OPTIONS);// getting the option from Form.java to EditForm.java
OPTIONS=ram;
if(OPTIONS.equals("CompanyDelivery")){
radioButtonCompany.setChecked(true);
deliveryText.setVisibility(View.VISIBLE);
editAddress.setVisibility(View.VISIBLE);
}else if(OPTIONS.equals("SelfDelivery")){
radioButtonSelf.setChecked(true);
deliveryText.setVisibility(View.GONE);
editAddress.setVisibility(View.GONE);
}
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup arg0, int arg1) {
// TODO Auto-generated method stub
selectedId = radioGroup.getCheckedRadioButtonId();
// find the radiobutton by returned id
radioButton = (RadioButton) findViewById(selectedId);
if(radioButton.isChecked()){
OPTIONS=radioButton.getText().toString();
if(OPTIONS.equals("SelfDelivery")){
deliveryText.setVisibility(View.GONE);
editAddress.setVisibility(View.GONE);
}else{
deliveryText.setVisibility(View.VISIBLE);
editAddress.setVisibility(View.VISIBLE);
}
}
}
});
我想根据用户选择使radiobutton为真,同时返回编辑页面。
例如:如果用户选择了公司交货,当用户要在交货选项中编辑表单时,应在编辑页面中选中公司交货
我犯了一个错误
radioButtonCompany.setChecked(真)
错误是
10-10 04:41:20.721: E/AndroidRuntime(794): FATAL EXCEPTION: main
10-10 04:41:20.721: E/AndroidRuntime(794): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android/com.example.android.EditBookingForm}: java.lang.NullPointerException
10-10 04:41:20.721: E/AndroidRuntime(794): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
10-10 04:41:20.721: E/AndroidRuntime(794): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
10-10 04:41:20.721: E/AndroidRuntime(794): at android.app.ActivityThread.access$600(ActivityThread.java:141)
10-10 04:41:20.721: E/AndroidRuntime(794): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
10-10 04:41:20.721: E/AndroidRuntime(794): at android.os.Handler.dispatchMessage(Handler.java:99)
10-10 04:41:20.721: E/AndroidRuntime(794): at android.os.Looper.loop(Looper.java:137)
10-10 04:41:20.721: E/AndroidRuntime(794): at android.app.ActivityThread.main(ActivityThread.java:5041)
10-10 04:41:20.721: E/AndroidRuntime(794): at java.lang.reflect.Method.invokeNative(Native Method)
10-10 04:41:20.721: E/AndroidRuntime(794): at java.lang.reflect.Method.invoke(Method.java:511)
10-10 04:41:20.721: E/AndroidRuntime(794): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
10-10 04:41:20.721: E/AndroidRuntime(794): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
10-10 04:41:20.721: E/AndroidRuntime(794): at dalvik.system.NativeStart.main(Native Method)
10-10 04:41:20.721: E/AndroidRuntime(794): Caused by: java.lang.NullPointerException
如果没有Logcat打印输出,就没有什么可做的了,我可以做的唯一假设是,您在radioButtonCompany的布局中没有找到合适的id,并且得到了一个空指针错误 或者,您正试图在UI线程外部修改单选按钮的检查状态,因此需要在runOnUIThread(){}子句中包围setChecked。但额外的LogCat输出将有很大帮助