Android编程实现在自定义对话框中获取EditText中数据的方法

2019-10-22 18:16:14

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本文实例讲述了Android编程实现在自定义对话框中获取EditText中数据的方法。分享给大家供大家参考，具体如下：

在项目中忽然遇到这样的问题，需要自定义对话框，对话框需要有一个输入框，以便修改所选中的价格，然后点击确定之后，修改所显示的价格。遇到的最大的问题就是如何能够获取到自定义对话框当中edittext输入的数值，百度了很久，看到的答案都是如下：

//得到自定义对话框final View DialogView = a .inflate ( R.layout.loand, null);

这是关键的代码

//创建对话框AlertDialog dlg = new AlertDialog.Builder(loand.this).setTitle("登录框").setView(DialogView)//设置自定义对话框的样式.setPositiveButton("登陆", //设置"确定"按钮new DialogInterface.OnClickListener() //设置事件监听{  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();   //输入完成后，点击“确定”开始登陆   c_log judge = new c_log();   boolean b_judge = judge.aa(id,password);   if(b_judge){   bar();   }else{//加东西   DisplayToast("NO");   }  }})

上述方法对于使用系统自带的alertdialog来说，的确是没有问题，能够取到你输入的edittext的值，但对于自定义的alertdialog来说，就会始终拿到的是空的，我的解决方案是在自定义alertdialog里面取到edittext并且实例化，避免在activity里面进行初始化，步骤如下：

1.主要的activity主类代码：

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;/** * 系统设置界面 * * @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 {  // 四组需要打钩的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;  // 三个自定义输入金额  private TextView inputamount2;  private TextView inputamount5;  private TextView inputamount10;  // 跳转到下一个页面的4个textview，货币对选择、密码修改、凭证密码修改、RSS源选择  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);    // 价格修改弹出对话框    layout = inflater.inflate(        R.layout.activity_systemsettings_pricecustom_dialog,        (ViewGroup) vi.findViewById(R.id.dialog));  //。。。。。。。。。。省略了部分代码，因为是公司项目的。。。。。。。。。。。。。。  // 三个自定义金额的监听事件  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;      }    });  }  // 点击价格，弹出编辑框，对价格进行修改  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) {            // 获取edittext的值            String priceStr = builder.getPrice();//关键代码，getPrice放在自定义的alertdialog类里面，进行初始化            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的父组件，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.自定义alertdialog类，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;/** * 系统设定中修改价格的弹出对话窗口 * * @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;    }    //关键代码    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);      //对edittext进行初始化，关键代码      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.剩下的就是布局代码，包括一些圆角的，如果需要的可以参考我之前的博文，就不贴代码了。完成效果如下：

Android,自定义对话框,获取,EditText,数据

总结一些，对于自定义的对话框，无法在主activity中初始化对话框里的控件的时候，可以将初始化或者取值的操作放到自定义控件里面，这样就可以取值和赋值操作，忙活了一天，终于在师傅的指导下完成了这部分功能，看来单纯的看网上的答案，可能我几天都解决不了，还得多了解一些本质，对象得传递，得好好恶补一下基础知识，不懂得或者需要解释的可以联系我。

希望本文所述对大家Android程序设计有所帮助。

注：相关教程知识阅读请移步到Android开发频道。

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