需要实现的效果图：

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一个项目所用到的对话框风格必须统一，但显示的文字、布局却可以不同。如果每个对话框都要重新去创建的话，会增加代码的冗余，浪费资源。所以可以写个类 MyDialog 继承Dailog。需要的时候直接调用MyDialog类。

一、新建xml布局。

xml效果图如下：

    

尽量将对话框要用到的所有控件在xml中排好，部分不需要的可以在代码setVisibility(View.GONE);让其消失，省的新建多个xml文件。

二、继承Dailog

package com.dnake.evertalk.widgets;

import com.dnake.evertalk.R;

import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;


public class MyDialog extends Dialog {

    public MyDialog(Context context) {
        super(context);
    }

    public MyDialog(Context context, int theme) {
        super(context, theme);
    }

    public static class Builder {
        private Context context;
        private String title;
        private String message;
        private String positiveButtonText;
        private String negativeButtonText;
        private View contentView;
        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(int message) {//设置信息
            this.message = (String) context.getText(message);
            return this;
        }

    
        public Builder setTitle(int title) { //设置标题
            this.title = (String) context.getText(title);
            return this;
        }


        public Builder setTitle(String title) {//直接传字符串
            this.title = title;
            return this;
        }

        public Builder setContentView(View v) {
            this.contentView = v;
            return this;
        }

        /**
         * Set the positive button resource and it's listener
         */
        public Builder setPositiveButton(int positiveButtonText,DialogInterface.OnClickListener listener) {
            this.positiveButtonText = (String) context.getText(positiveButtonText);
            this.positiveButtonClickListener = listener;
            return this;
        }

        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 void create(View layout) {
            final MyDialog dialog = new MyDialog(context,R.style.dialog_theme);
            dialog.addContentView(layout, new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
            
            ((TextView) layout.findViewById(R.id.title)).setText(title);
            
            if (positiveButtonText != null) {
                ((Button) layout.findViewById(R.id.positiveButton)).setText(positiveButtonText);
                if (positiveButtonClickListener != null) {
                    ((Button) layout.findViewById(R.id.positiveButton)).setOnClickListener(new View.OnClickListener() {
                                public void onClick(View v) {
                                    positiveButtonClickListener.onClick(dialog,DialogInterface.BUTTON_POSITIVE);
                                }
                            });
                }
            } else {
                layout.findViewById(R.id.positiveButton).setVisibility(View.GONE);
            }
            
            if(message != null) {
                TextView hint = (TextView) layout.findViewById(R.id.tv_message);
                hint.setText(message);
            }
            
            if (negativeButtonText != null) {
                ((Button) layout.findViewById(R.id.negativeButton)).setText(negativeButtonText);
                if (negativeButtonClickListener != null) {
                    ((Button) layout.findViewById(R.id.negativeButton)).setOnClickListener(new View.OnClickListener() {
                                public void onClick(View v) {
                                    negativeButtonClickListener.onClick(dialog,DialogInterface.BUTTON_NEGATIVE);
                                }
                            });
                }
            } else {
                layout.findViewById(R.id.negativeButton).setVisibility(View.GONE);
            }
            
            dialog.setContentView(layout);
            dialog.show();
        }

    }
}

三、在Activity中创建dialog,设置标题、信息以及按钮的处理事件

    private void showDialog() {
        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        final View layout = inflater.inflate(R.layout.dialog, null);
        
        Builder builder = new MyDialog.Builder(this);
        
        builder.setTitle(getResources().getString(R.string.mymessageactivity_delete_title));
        builder.setMessage(getResources().getString(R.string.mymessageactivity_delete_all_hint));
        
        builder.setPositiveButton(getResources().getString(R.string.sure),new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss(); 
                intData();
            }
        });

        builder.setNegativeButton(getResources().getString(R.string.cancel),
                new android.content.DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                });

        builder.create(layout);
    }

这样就实现了项目需要的对话框效果图，且不同的Activity的对话框可显示不同的文字，也可以处理不同的点击事件。

本文标题：自定义Dialog
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