AlertDialog用法及自定义样式

自定义对话框AlertDialog

样式一: 布局简单，直接在布局文件中写死

效果预览：

xml布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="300dp"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@color/White"
    android:padding="10dp"
    >

    <TextView
        android:id="@+id/tv_alert_dialog_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="提示消息"
        android:textColor="@color/Black"
        android:textSize="18sp"
        />

    <TextView
        android:id="@+id/tv_alert_dialog_message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="请输入手机号或邮箱"
        android:textSize="14sp"
        android:textColor="@color/Black"
        android:layout_marginTop="10dp"
        />

    <TextView
        android:id="@+id/tv_alert_dialog_yes"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="确定"
        android:textSize="14sp"
        android:textColor="@color/TitleGreen"
        android:layout_marginTop="15dp"
        android:gravity="right"
        />

</LinearLayout>

Java代码：

private void alertDialog(String message) {
	final AlertDialog dialog = new AlertDialog.Builder(this).create();
	dialog.show();  //注意：必须在window.setContentView之前show
	Window window = dialog.getWindow();
	window.setContentView(R.layout.alert_dialog);
	TextView dialogMessage = (TextView) window.findViewById(R.id.tv_alert_dialog_message);
	dialogMessage.setText(message);
	TextView yesButton = (TextView) window.findViewById(R.id.tv_alert_dialog_yes);
	//点击确定按钮让对话框消失
	yesButton.setOnClickListener(new View.OnClickListener() {
		@Override
		public void onClick(View v) {
			dialog.dismiss();
		}
	});
}

需要注意的是 dialog.show() 必须在setContentView之前调用，否则会报错。

样式二: 布局复杂，用到ListView

效果图

AlertDialog的总布局
alert dialog addbook.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/tv_title_alert_dialog_addbook"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="书籍分类"
        android:textColor="@color/TextColorGray"
        android:textSize="14sp"
        android:paddingTop="10dp"
        android:paddingBottom="10dp"
        android:paddingLeft="20dp"
        android:background="@color/White"
        />
    <!--分割线-->
    <TextView
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="@color/divideLineGrayLighter" />
    <ListView
        android:id="@+id/lv_alert_dialog_addbook"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/White"
        >
    </ListView>

</LinearLayout> 

ListView的条目布局
item listview categroy.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <TextView
        android:id="@+id/tv_item_listview_categroy"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="文学艺术"
        android:textColor="@color/TextColorGray2"
        android:textSize="13sp"
        android:background="@color/White"
        android:gravity="center"
        android:padding="10dp"
        />
</LinearLayout>

封装的工具类AlertDialogUtils

package com.cachecats.oldbook.utils;

import android.app.AlertDialog;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;
import com.cachecats.oldbook.R;
import org.w3c.dom.Text;

/**
 * Created by Administrator on 2016/8/5.
 */
public class AlertDialogUtils {

	/**
     * 弹出自定义样式的AlertDialog
     * @param context  上下文
     * @param title AlertDialog的标题
     * @param tv 点击弹出框选择条目后，要改变文字的TextView
     * @param args 作为弹出框中item显示的字符串数组
     */
    public static void showAlertDialog(Context context,String title, final TextView tv, final String[] args){
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        final AlertDialog dialog = builder.create();
        dialog.show();

        View view = LayoutInflater.from(context).inflate(R.layout.alert_dialog_addbook, null);
        TextView tvTitle = (TextView) view.findViewById(R.id.tv_title_alert_dialog_addbook);
        ListView list = (ListView)view.findViewById(R.id.lv_alert_dialog_addbook);
        tvTitle.setText(title);
        ListAdapter adpter = new ArrayAdapter<String>(context,R.layout.item_listview_categroy,R.id.tv_item_listview_categroy,args);
        list.setAdapter(adpter);
        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                tv.setText(args[position]);
                dialog.dismiss();
            }
        });
        dialog.getWindow().setContentView(view);
    }
}

在activity或fragment中的调用

private final String[] Category = new String[]{ "文学艺术", "人文社科", "经济管理", "生活休闲"
        , "外语学习", "自然科学", "考试教育", "计算机软件", "医学"};

AlertDialogUtils.showAlertDialog(getContext(),"书籍分类",tvSelectCategroy,Category);

AlertDialog自定义大小

AlertDialog.Builder builder = new AlertDialog.Builder(this);  
        builder.setView(LayoutInflater.from(context).inflate(R.layout.select_birthday_item,null));  
        builder.setTitle("选择出生日期");  
        AlertDialog alertDialog = builder.create();  
        alertDialog.show();  
        WindowManager.LayoutParams  lp= alertDialog.getWindow().getAttributes();  
        lp.width=350;//定义宽度  
        lp.height=300;//定义高度  
        alertDialog.getWindow().setAttributes(lp);