有很多人在 stackoverflow 上遇到过同样的错误,但我无法在这些帖子中找到任何相关的解决方案。我的 MainActivity 正在使用 startActivityForResult(); 开始一个新 Activity (SecondActivity); SecondActivity 然后使用 onBackPressed() 返回一些数据;和 putExtra();
从 MainActivity.java 中提取:
public void addNewNote(View v){
Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("Source", "NEW");
startActivityForResult(intent, 1); //1 is the result code
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.v("TAG", data.getStringExtra("Note"));
if (requestCode == 1) {
if(resultCode == RESULT_OK){
listItems.add(data.getStringExtra("Note"));
Log.v("TAG", data.getStringExtra("Note"));
adapter.notifyDataSetChanged();
listView.invalidateViews();
}
if (resultCode == RESULT_CANCELED) {
}
}
}
从 SecondActivity.java 中提取:
@Override
public void onBackPressed() {
super.onBackPressed();
if (mainTextField.getText() != null){
Intent returnIntent = new Intent();
returnIntent.putExtra("Note",mainTextField.getText());
setResult(RESULT_OK, returnIntent);
finish();
} else {
Intent returnIntent = new Intent();
setResult(RESULT_CANCELED, returnIntent);
finish();
}
}
Logcat:
最佳答案
试试这个-
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == 1 && data != null)
{
Log.v("TAG", data.getStringExtra("Note"));
if(resultCode == RESULT_OK)
{
listItems.add(data.getStringExtra("Note"));
Log.v("TAG", data.getStringExtra("Note"));
adapter.notifyDataSetChanged();
listView.invalidateViews();
}
if (resultCode == RESULT_CANCELED)
{
}
}
}
关于java - 传递结果 ResultInfo 失败,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20782619/