本文實例講述了Android編程實現在自定義對話框中獲取EditText中數據的方法。分享給大家供大家參考，具體如下：
在項目中忽然遇到這樣的問題，需要自定義對話框，對話框需要有一個輸入框，以便修改所選中的價格，然后點擊確定之后，修改所顯示的價格。遇到的最大的問題就是如何能夠獲取到自定義對話框當中edittext輸入的數值，百度了很久，看到的答案都是如下：
//得到自定義對話框final View DialogView = a .inflate ( R.layout.loand, null);
這是關鍵的代碼
//創建對話框AlertDialog dlg = new AlertDialog.Builder(loand.this).setTitle("登錄框").setView(DialogView)//設置自定義對話框的樣式.setPositiveButton("登陸", //設置"確定"按鈕new DialogInterface.OnClickListener() //設置事件監聽{ public void onClick(DialogInterface dialog, int whichButton) { editText1 =(EditText) DialogView.findViewById(R.id.editText1); editText2 =(EditText) DialogView.findViewById(R.id.editText2); String id = editText1.getText().toString(); String password = editText2.getText().toString(); //輸入完成后，點擊“確定”開始登陸 c_log judge = new c_log(); boolean b_judge = judge.aa(id,password); if(b_judge){ bar(); }else{//加東西 DisplayToast("NO"); } }})上述方法對于使用系統自帶的alertdialog來說，的確是沒有問題，能夠取到你輸入的edittext的值，但對于自定義的alertdialog來說，就會始終拿到的是空的，我的解決方案是在自定義alertdialog里面取到edittext并且實例化，避免在activity里面進行初始化，步驟如下：
1.主要的activity主類代碼：
package client.verbank.mtp.allone.frame.systemsettings;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.TextView;import android.widget.ToggleButton;import client.verbank.mtp.allone.R;import client.verbank.mtp.allone.component.CustomDialogPriceModify;import client.verbank.mtp.allone.consts.IBundleCommData;import client.verbank.mtp.allone.consts.ISystemCommData;import client.verbank.mtp.allone.frame.ControlFragment;import client.verbank.mtp.allone.frame.MainActivity;import client.verbank.mtp.allone.frame.systemsettings.nextpage.ChangePasswordActivity;import client.verbank.mtp.allone.frame.systemsettings.nextpage.ChangePhonePinActivity;import client.verbank.mtp.allone.frame.systemsettings.nextpage.ChooseRssActivity;import client.verbank.mtp.allone.frame.systemsettings.nextpage.SelectInstrumentActivity;import client.verbank.mtp.allone.util.SharepreferencesUtilSystemSettings;/** * 系統設置界面 * * @Project: FEIB_AndroidStation * @Title: SystemSettingsFragment.java * @Package client.verbank.mtp.allone.frame.systemsettings * @Description: TODO * @author qiulinhe qiu.linhe@allone.cn * @date 2015年9月29日 上午11:48:53 * @Copyright: 2015 www.allone.cn Inc. All rights reserved. * @version V3.0.0 */public class SystemSettingsFragment extends ControlFragment implements ISystemCommData { // 四組需要打鉤的textview初始化 private TextView currencypairs; private TextView openpositionprice; private TextView floatingprofit; private TextView dealtime; private TextView ordercurrencypairs; private TextView pricehighend; private TextView priceendhigh; private TextView summarycurrencypairs; private TextView summaryfloatingprofit; private TextView riseandfall; private TextView applies; // 三個自定義輸入金額 private TextView inputamount2; private TextView inputamount5; private TextView inputamount10; // 跳轉到下一個頁面的4個textview，貨幣對選擇、密碼修改、憑證密碼修改、RSS源選擇 private TextView Currencyofchoice; private TextView changepassword; private TextView changecertificatepassword; private TextView rsssource; ToggleButton mosthightoggle; ToggleButton mostlowtoggle; ToggleButton riseandfallmenutoggle; ToggleButton pricetimetoggle; View layout; // EditText price; AlertDialog dlg; int flagprice = 0; private Handler handler = new Handler(); public SystemSettingsFragment(MainActivity activity) { super(activity); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View vi = inflater.inflate(R.layout.system_settings, container, false); // 價格修改彈出對話框 layout = inflater.inflate( R.layout.activity_systemsettings_pricecustom_dialog, (ViewGroup) vi.findViewById(R.id.dialog)); //。。。。。。。。。。省略了部分代碼，因為是公司項目的。。。。。。。。。。。。。。 // 三個自定義金額的監聽事件 private void selfThreeMoneyLister(View vi) { inputamount2.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { modifyPriceDialog(); flagprice = 1; } }); inputamount5.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { modifyPriceDialog(); flagprice = 2; } }); inputamount10.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { modifyPriceDialog(); flagprice = 3; } }); } // 點擊價格，彈出編輯框，對價格進行修改 private void modifyPriceDialog() { LayoutInflater factory = LayoutInflater.from(getActivity()); final View DialogView = factory.inflate( R.layout.activity_systemsettings_pricecustom_dialog, null); final CustomDialogPriceModify.Builder builder = new CustomDialogPriceModify.Builder( getActivity()); builder.setTitle("價格修改"); builder.setPositiveButton(R.string.confirm, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // 獲取edittext的值 String priceStr = builder.getPrice();//關鍵代碼，getPrice放在自定義的alertdialog類里面，進行初始化 if (flagprice == 1) { inputamount2.setText(priceStr); SharepreferencesUtilSystemSettings.putValue( getActivity(), System_key_SelfAmout2, priceStr); } else if (flagprice == 2) { inputamount5.setText(priceStr); SharepreferencesUtilSystemSettings.putValue( getActivity(), System_key_SelfAmout5, priceStr); } else { inputamount10.setText(priceStr); SharepreferencesUtilSystemSettings.putValue( getActivity(), System_key_SelfAmout10, priceStr); } // price.setText(""); /** * 取得view的父組件，然后移除view */ dialog.dismiss(); } }); builder.setNegativeButton(R.string.cancel, new android.content.DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub // ((ViewGroup) layout.getParent()).removeView(layout); dialog.dismiss(); } }); builder.create().show(); }}2.自定義alertdialog類，CustomDialogPriceModify.java，如下：
package client.verbank.mtp.allone.component;import android.app.Dialog;import android.content.Context;import android.content.DialogInterface;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup.LayoutParams;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import client.verbank.mtp.allone.R;/** * 系統設定中修改價格的彈出對話窗口 * * @author wangyubo * */public class CustomDialogPriceModify extends Dialog { public CustomDialogPriceModify(Context context) { super(context); } public CustomDialogPriceModify(Context context, int theme) { super(context, theme); } public static class Builder { private Context context; private String title; private float textSize; private String message; private String positiveButtonText; private String negativeButtonText; private View contentView; private EditText priceText; private DialogInterface.OnClickListener positiveButtonClickListener; private DialogInterface.OnClickListener negativeButtonClickListener; public Builder(Context context) { this.context = context; } public Builder setMessage(String message) { this.message = message; return this; } public Builder setMessage(String message, float textSize) { this.message = message; this.textSize = textSize; return this; } /** * Set the Dialog message from resource * * @param title * @return */ public Builder setMessage(int message) { this.message = (String) context.getText(message); return this; } /** * Set the Dialog title from resource * * @param title * @return */ public Builder setTitle(int title) { this.title = (String) context.getText(title); return this; } /** * Set the Dialog title from String * * @param title * @return */ public Builder setTitle(String title) { this.title = title; return this; } public Builder setContentView(View v) { this.contentView = v; return this; } /** * Set the positive button resource and it's listener * * @param positiveButtonText * @return */ public Builder setPositiveButton(int positiveButtonText, DialogInterface.OnClickListener listener) { this.positiveButtonText = (String) context .getText(positiveButtonText); this.positiveButtonClickListener = listener; return this; } //關鍵代碼 public String getPrice() { return priceText.getText().toString(); } public Builder setPositiveButton(String positiveButtonText, DialogInterface.OnClickListener listener) { this.positiveButtonText = positiveButtonText; this.positiveButtonClickListener = listener; return this; } public Builder setNegativeButton(int negativeButtonText, DialogInterface.OnClickListener listener) { this.negativeButtonText = (String) context .getText(negativeButtonText); this.negativeButtonClickListener = listener; return this; } public Builder setNegativeButton(String negativeButtonText, DialogInterface.OnClickListener listener) { this.negativeButtonText = negativeButtonText; this.negativeButtonClickListener = listener; return this; } public CustomDialogPriceModify create() { LayoutInflater inflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); // instantiate the dialog with the custom Theme final CustomDialogPriceModify dialog = new CustomDialogPriceModify( context, R.style.Dialog); dialog.setCanceledOnTouchOutside(false); dialog.setCancelable(false); View layout = inflater.inflate( R.layout.activity_systemsettings_pricecustom_dialog, null); dialog.addContentView(layout, new LayoutParams( LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); // set the dialog title ((TextView) layout.findViewById(R.id.title)).setText(title); priceText = (EditText) layout.findViewById(R.id.price); //對edittext進行初始化，關鍵代碼 if (positiveButtonText != null) { ((Button) layout.findViewById(R.id.positiveButton)) .setText(positiveButtonText); if (positiveButtonClickListener != null) { ((Button) layout.findViewById(R.id.positiveButton)) .setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { positiveButtonClickListener.onClick(dialog, DialogInterface.BUTTON_POSITIVE); } }); } } else { // if no confirm button just set the visibility to GONE layout.findViewById(R.id.positiveButton).setVisibility( View.GONE); } // set the cancel button if (negativeButtonText != null) { ((Button) layout.findViewById(R.id.negativeButton)) .setText(negativeButtonText); if (negativeButtonClickListener != null) { ((Button) layout.findViewById(R.id.negativeButton)) .setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { negativeButtonClickListener.onClick(dialog, DialogInterface.BUTTON_NEGATIVE); } }); } } else { // if no confirm button just set the visibility to GONE layout.findViewById(R.id.negativeButton).setVisibility( View.GONE); } // set the content message if (message != null) { TextView msgView = (TextView) layout.findViewById(R.id.message); msgView.setText(message); if (textSize != 0) { msgView.setTextSize(textSize); } } else if (contentView != null) { } dialog.setContentView(layout); return dialog; } }}3.剩下的就是布局代碼，包括一些圓角的，如果需要的可以參考我之前的博文，就不貼代碼了。完成效果如下：
總結一些，對于自定義的對話框，無法在主activity中初始化對話框里的控件的時候，可以將初始化或者取值的操作放到自定義控件里面，這樣就可以取值和賦值操作，忙活了一天，終于在師傅的指導下完成了這部分功能，看來單純的看網上的答案，可能我幾天都解決不了，還得多了解一些本質，對象得傳遞，得好好惡補一下基礎知識，不懂得或者需要解釋的可以聯系我。
希望本文所述對大家Android程序設計有所幫助。
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