这是我的小测试程序。我的问题是从run()方法访问错误（旧）活动的字段，该字段在屏幕方向更改后被破坏。有什么办法来处理这种情况？而且，顺便说一句，我必须重新创建我的活动，因为在实际应用程序中，纵向和横向模式有不同的布局！
public class MainActivity extends Activity {
private EditText edit;
private Button button;
private ProgressDialog progressDialog;
private boolean isLoginInProgress = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edit = (EditText) findViewById(R.id.edit_timer);
button = (Button) findViewById(R.id.btn_start);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
try {
if (edit.getText().toString().length() == 0) throw new Exception();
long dTime = Long.parseLong(edit.getText().toString());
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
MainActivity.this.isLoginInProgress = false;
progressDialog.dismiss();
}
}, dTime);
progressDialog.show();
isLoginInProgress = true;
} catch (Exception e) {
Toast.makeText(MainActivity.this, "bad time value", Toast.LENGTH_SHORT).show();
}
}
});
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("loading");
if (savedInstanceState != null) { // activity is restarted
isLoginInProgress = savedInstanceState.getBoolean("fl_login");
edit.setText(savedInstanceState.getString("edit"));
}
if (isLoginInProgress) { // Show dialog again
progressDialog.show();
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putBoolean("fl_login", isLoginInProgress);
outState.putString("edit", edit.getText().toString());
}
@Override
public void onDestroy(){
super.onDestroy();
progressDialog.dismiss();
}
}