我创建了 2 个类和一个接口。一个处理对话框点击的接口，一个包含一个按钮和一个 textView 的 MainActivity 类。MainActiviy 类实例化了我的第二个类（FireMissilesFragment），其中包含一个 AlertDialog 作为片段。在 FireMisslesFragment 中，我动态创建了 EditText。我的应用程序的问题是，当我在实例化 FireMissilesFragment 的 mainActivity 类中调用 (onsavenstancestate) 时，我尝试保存我的 editText 值，以便当弹出窗口关闭并重新启动它时，editText 的值将保持它的值一旦弹出窗口再次打开。
我已经尝试过（onSaveInstanceState）方法并且值保持不变；但是，一旦再次启动对话框，我仍有可能重新创建被破坏的内容。有人可以解释一下这个问题。
这是我的代码：
//================================接口================ ======================//
public interface NoticeDialogListener {
public void onDialogPositiveClick(DialogFragment dialog,EditText[] editText);
public void onDialogNegativeClick(DialogFragment dialog);
}
//===========================MainActivity 类==================== =========//
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends FragmentActivity implements ` NoticeDialogListener{
private EditText[] _edText;
private TextView _tv;
private Multiplication multi;
private Double[] s;
private String s1;
public static final String _SCORE1 = "score1";
public static final String _SCORE2 = "score2";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
_tv = (TextView)findViewById(R.id.textView1);
Button dAction = (Button)findViewById(R.id.button1);
s = new Double[2];
dAction.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {//open();
confirmFireMissiles();
}
});//ssetOnclickLi...
///success thank god.
//===================================================//
}
public void confirmFireMissiles() {
DialogFragment newFragment = new FireMissilesDialogFragment();
newFragment.show(getSupportFragmentManager(),"ff");
}//confirmFireMisslesClosing brace
// The below is what happens when the Button "multiply" in
Dialog window pops up.
@Override
public void onDialogPositiveClick(DialogFragment dialog,EditText[]
editText) {
_edText = editText; // is this association
multi = new Multiplication();
try{
// gets the text and stores to string array.
s[0]=Double.parseDouble(_edText[0].getText().toString());
s[1]=Double.parseDouble(_edText[0].getText().toString());
Log.d("hello", String.valueOf(s[0]));
}catch(NumberFormatException e){
_tv.setText("please Insert an Number and calculate again"); //
Log.d("Error", "place in numbers please");
}
s1 = String.valueOf(multi.multiply(s[0],s[1]));
//set Textview to s1.
_tv.setText(s1);
}
@Override
public void onDialogNegativeClick(DialogFragment dialog) {}
}
//================================================= =================================// public class FireMissilesDialogFragment extends DialogFragment { private AlertDialog.Builder builder; 私人 EditText[] _edText; // 准备就绪时启用 private NoticeDialogListener _mListener; 公共静态最终字符串_SCORE1 =“score1”；公共静态最终字符串_SCORE2 =“score2”；私人 Double[] s;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the Builder class for convenient dialog construction
builder = new AlertDialog.Builder(getActivity());
//shows added content to dialog.
// d = new String[2];
s = new Double[2];
if(savedInstanceState !=null){
s[0] = Double.parseDouble(savedInstanceState.getString(_SCORE1));
s[1] = Double.parseDouble(savedInstanceState.getString(_SCORE2));
Log.d("Hey",String.valueOf(s[0]));
_edText[0].setText(String.valueOf(s[0]));
showIt();
}else{
showIt();
}
//sets the characterisitcs of the dialogue.
builder.setTitle("We are all stars of the show.");
builder.setMessage( "we are strong")
.setPositiveButton("Multiply", new
DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialog, int id) {
// enable when ready
_mListener.onDialogPositiveClick(FireMissilesDialogFragment.this,_edText);
}
});
// Create the AlertDialog object and return it
return builder.create();
}
public void showIt(){
// 这段代码创建了一个线性布局，假设显示在对话框弹出窗口中。LayoutParams 参数 = new
LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, 1.0f); 线性布局布局=新线性布局（getActivity（））；layout.setLayoutParams(param); layout.setOrientation(LinearLayout.VERTICAL); layout.setBackgroundColor(Color.BLACK);
// Dynamically place EditText efficiently Inside Linear Layout.
_edText = new EditText[4];
for (int i = 0;i< _edText.length;i++) {
_edText[i] = new EditText(getActivity());
_edText[i].setInputType(InputType.TYPE_CLASS_NUMBER |
InputType.TYPE_NUMBER_FLAG_DECIMAL);
_edText[i].setTextSize(20)
try{
s[i] =Double.parseDouble(
_edText[i].getText().toString());
}catch(NumberFormatException e){
// Log.d("hello", "wrong input");
}
layout.addView(_edText[i]);
}
builder.setView(layout);
}
//============================================== Look over this code======////////////
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
//Verify that the host activity implements the callback interface
try {
// Instantiate the NoticeDialogListener so we can send events to the host
_mListener = (NoticeDialogListener) activity;
} catch (ClassCastException e) {
// The activity doesn't implement the interface, throw exception
throw new ClassCastException(activity.toString()
+ " must implement NoticeDialogListener");
}
}
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
// Save the user's current game state
savedInstanceState.putDouble(_SCORE1,s[0]);
savedInstanceState.putDouble(_SCORE2,s[1]);
super.onSaveInstanceState(savedInstanceState);
}
}