自定义AlertDialog

自定义  AlertDialog 的实现代码，能满足大部分dialog的需求，在使用的时候只需传入你自己的布局即可得到你想要的布局样式。

先上图：

要传入的dialog布局：

dialog.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/gray" >

    <RelativeLayout
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:background="@color/white" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginLeft="5dp"
            android:text="性别"
            android:textSize="18sp" />
    </RelativeLayout>

    <RelativeLayout
        android:id="@+id/sex_m"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_below="@id/title"
        android:background="@color/white" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_marginLeft="15dp"
            android:gravity="center_vertical"
            android:text="男"
            android:textSize="15sp" />

        <TextView
            android:id="@+id/choose_m"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_alignParentRight="true"
            android:layout_marginRight="10dp"
            android:gravity="center_vertical"
            android:text="√"
            android:textColor="@color/light_blue"
            android:textSize="20sp" />
    </RelativeLayout>
    
    <RelativeLayout
        android:id="@+id/sex_f"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_below="@id/sex_m"
        android:layout_marginTop="1dp"
        android:background="@color/white" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_marginLeft="15dp"
            android:gravity="center_vertical"
            android:text="女"
            android:textSize="15sp" />

        <TextView
            android:id="@+id/choose_f"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_alignParentRight="true"
            android:layout_marginRight="10dp"
            android:gravity="center_vertical"
            android:visibility="gone"
            android:text="√"
            android:textColor="@color/light_blue"
            android:textSize="20sp" />
    </RelativeLayout>

</RelativeLayout>

自定义的AlertDialog类:

CustomAlertDialogUtil.java

import android.app.Activity;
import android.app.AlertDialog;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager.LayoutParams;

/**
 * 自定义  AlertDialog 的实现代码，能满足大部分dialog的需求
 *
 */
public class CustomAlertDialogUtil {
	
	AlertDialog dialog;
	
	public void showDialog(Activity activity, View view){
		//创建一个AlertDialog对象
		dialog = new AlertDialog.Builder(activity).create();
		//把自定义的布局设置到dialog中，注意，布局设置一定要在show之前。从第二个
		//参数分别填充内容与边框之间左、右、上、下的像素
		dialog.setView(view, 0, 0, 0, 0);
		//（java.lang.IllegalStateException: The specified child
		//already has a parent. You must call removeView() on the child's parent first）
		//的解决方法
		ViewGroup parent = (ViewGroup) view.getParent();
		if(parent != null){
			parent.removeAllViews();
		}
		dialog.show();//一定要先show出来再设置dialog的参数，不然就不会改变dialog的大小了
	    //得到当前显示设备的宽度，单位是像素
		int width = activity.getWindowManager().getDefaultDisplay().getWidth();
		//得到这个dialog界面的参数对象
		LayoutParams params = dialog.getWindow().getAttributes();
		params.width = width - (width / 6);//设置dialog的界面宽度
		params.height = LayoutParams.WRAP_CONTENT;//设置dialog高度为包裹内容
		params.gravity = Gravity.CENTER;//设置dialog的重心
		dialog.getWindow().setAttributes(params);//最后把这个参数对象设置进去，即与dialog绑定
	}
	
	/**
	 * 关闭对话框
	 */
	public void dismiss(){
		dialog.dismiss();
	}
}

在Activity中的使用：

MainActivity.java

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

public class MainActivity extends Activity {
	
	private TextView choose_sex;
	private View view;
	private RelativeLayout sex_m;
	private RelativeLayout sex_f;
	private TextView choose_m;
	private TextView choose_f;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		choose_sex = (TextView) findViewById(R.id.choose_sex);
		
		view = getLayoutInflater().inflate(R.layout.dialog, null);
		sex_m = (RelativeLayout) view.findViewById(R.id.sex_m);
		sex_f = (RelativeLayout) view.findViewById(R.id.sex_f);
		choose_m = (TextView) view.findViewById(R.id.choose_m);
		choose_f = (TextView) view.findViewById(R.id.choose_f);
		
		choose_sex.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				final CustomAlertDialogUtil dialog = new CustomAlertDialogUtil();
				dialog.showDialog(MainActivity.this, view);
				//男点击事件
				sex_m.setOnClickListener(new OnClickListener() {
					
					@Override
					public void onClick(View v) {
						// TODO Auto-generated method stub
						choose_m.setVisibility(View.VISIBLE);//男的显示
						choose_f.setVisibility(View.GONE);//女的隐藏
						dialog.dismiss();
					}
				});
				
				//女点击事件
				sex_f.setOnClickListener(new OnClickListener() {
					
					@Override
					public void onClick(View v) {
						// TODO Auto-generated method stub
						choose_m.setVisibility(View.GONE);//男的隐藏
						choose_f.setVisibility(View.VISIBLE);//女的显示
						dialog.dismiss();
					}
				});
			}
		});
	}
}