给大家共享一个可以在任何界面调用的Dialog

UiHelper.java

package com.show.act;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.TextView;

public class UiHelper {
	
	/**
	 * 提问框的 Listener
	 * @author Lei
	 */
	//因为本类不是activity所以通过继承接口的方法获取到点击的事件
	public interface OnClickYesListener {
		abstract void onClickYes();
	}
	
	/**
	 * 提问框的 Listener
	 * @author Lei
	 */
	public interface OnClickNoListener {
		abstract void onClickNo();
	}
public static void showQuestionDialog(Context context, String title, String text, final OnClickYesListener listenerYes, final OnClickNoListener listenerNo) {
    	
		Builder builder = new AlertDialog.Builder(context);

		if (!isBlank(text)) {
			//此方法为dialog写布局
	    	final TextView textView = new TextView(context);
	    	textView.setText(text);
	    	LinearLayout layout = new LinearLayout(context);
	    	layout.setPadding(10, 0, 10, 0);
	    	layout.addView(textView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
			builder.setView(layout);
		}
    	//设置title
		builder.setTitle(title);
		//设置确定按钮,固定用法声明一个按钮用这个setPositiveButton
		builder.setPositiveButton(context.getString(R.string.yes), new OnClickListener() {
	    	public void onClick(DialogInterface dialog, int which) {
	    		//如果确定被电击
	    		if (listenerYes != null) {
	    			listenerYes.onClickYes();
	    		}
	    	}
	    });
		//设置取消按钮,固定用法声明第二个按钮要用setNegativeButton
		builder.setNegativeButton(context.getString(R.string.no), new OnClickListener() {
			public void onClick(DialogInterface dialog, int which) {
				//如果取消被点击
				if (listenerNo != null) {
					listenerNo.onClickNo();
				}
			}
		});
		
		//控制这个dialog可不可以按返回键,true为可以,false为不可以
		builder.setCancelable(true);
		//显示dialog
		builder.create().show();

	}
/**
 * 处理字符的方法
 * @param str
 * @return
 */
public static boolean isBlank(String str) {
	int strLen;
	if (str == null || (strLen = str.length()) == 0) {
		return true;
	}
	for (int i = 0; i < strLen; i++) {
		if ((Character.isWhitespace(str.charAt(i)) == false)) {
			return false;
		}
	}
	return true;
}
}

  

ShowDialogActivity.java

package com.show.act;

import com.show.act.UiHelper.OnClickNoListener;
import com.show.act.UiHelper.OnClickYesListener;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class ShowDialogActivity extends Activity {
//声明Button
  private Button showDialogButton;
  
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        init();
    }
    
    private void init(){
    	showDialogButton = (Button)findViewById(R.id.showDialog01);
    	 showDialogButton.setOnClickListener(new OnClickListener() {
			
			public void onClick(View arg0) {
				
				//调用工具类中的dialog
				//需要传三个值到showQuestionDialog("当前界面","标题","提示内容",new 确定,new 取消 );
				
				UiHelper.showQuestionDialog(ShowDialogActivity.this, "提示", "是否确定", new OnClickYesListener() {
					
					public void onClickYes() {
						// TODO Auto-generated method stub
						//点击确定干什么
						
					}
				}, new OnClickNoListener() {
					
					public void onClickNo() {
						// TODO Auto-generated method stub
						//点击取消干什么
					}
				});
				
			}
		});
    }
}

  

原文地址:https://www.cnblogs.com/firecode/p/2760673.html