分享一个圆角自定义的漂亮AlertDialog

\res\drawable-hdpi\bg_title_custom_dialog.xml:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item><shape>
            <gradient android:angle="270" android:endColor="#e1e1e1" android:startColor="#e1e1e1" />
            <corners android:topLeftRadius="15dp" android:topRightRadius="15dp" />
    </shape></item>
</selector>

\res\drawable-hdpi\bg_middle_custom_dialog.xml:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item><shape>
            <gradient android:angle="270" android:endColor="#f5f5f5" android:startColor="#f5f5f5" />
    </shape></item>
</selector>

\res\drawable-hdpi\bg_bottom_custom_dialog.xml:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item><shape>
            <gradient android:angle="270" android:endColor="#e1e1e1" android:startColor="#e1e1e1" />
            <corners android:bottomLeftRadius="15dp" android:bottomRightRadius="15dp" />
    </shape></item>
</selector>

\res\drawable-hdpi\bbuton_info_rounded.xml:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_pressed="true"><shape>
            <solid android:color="@color/bbutton_info_pressed" />
            <stroke android:width="1dp" android:color="@color/bbutton_info_edge" />
            <corners android:radius="@dimen/bbuton_rounded_corner_radius"/>
        </shape></item>

    <item android:state_enabled="false"><shape>
        <solid android:color="@color/bbutton_info_disabled" />
            <stroke android:width="1dp" android:color="@color/bbutton_info_disabled_edge" />
            <corners android:radius="@dimen/bbuton_rounded_corner_radius"/>
        </shape></item>

    <item><shape>
            <solid android:color="@color/bbutton_info" />
            <stroke android:width="1dp" android:color="@color/bbutton_info_edge" />
            <corners android:radius="@dimen/bbuton_rounded_corner_radius"/>
        </shape></item>

</selector>

\res\drawable-hdpi\bbuton_danger_rounded.xml:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_pressed="true"><shape>
            <solid android:color="@color/bbutton_danger_pressed" />
            <stroke android:width="1dp" android:color="@color/bbutton_danger_edge" />
            <corners android:radius="@dimen/bbuton_rounded_corner_radius"/>
        </shape></item>

    <item android:state_enabled="false"><shape>
        <solid android:color="@color/bbutton_danger_disabled" />
            <stroke android:width="1dp" android:color="@color/bbutton_danger_disabled_edge" />
            <corners android:radius="@dimen/bbuton_rounded_corner_radius"/>
        </shape></item>

    <item><shape>
            <solid android:color="@color/bbutton_danger" />
            <stroke android:width="1dp" android:color="@color/bbutton_danger_edge" />
            <corners android:radius="@dimen/bbuton_rounded_corner_radius"/>
        </shape></item>

</selector>

\res\layout\custom_dialog_layout.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:minWidth="280dip"
    android:orientation="vertical"
    android:background="@null">

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/bg_title_custom_dialog"
        android:paddingTop="10dip"
        android:paddingBottom="10dip"
        android:orientation="horizontal" >
        <ImageView
            android:layout_width="32dp"
            android:layout_height="32dp"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="10dip"
            android:src="@drawable/ic_expand"
            android:contentDescription="@string/line"/>
        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="8dip"
            android:textSize="16sp"
            />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/content"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:minHeight="100dip"
        android:background="@drawable/bg_middle_custom_dialog"
        android:orientation="vertical"
        android:gravity="center">

        <TextView
            android:id="@+id/message"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dip"
            android:textSize="16sp"
            android:textColor="#FF000000"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingTop="5dip"
        android:paddingBottom="5dip"
        android:paddingLeft="5dip"
        android:paddingRight="5dip"
        android:background="@drawable/bg_bottom_custom_dialog"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/positiveButton"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:background="@drawable/bbuton_info_rounded"
            android:textColor="@color/bg_white"
            android:layout_weight="1"
            android:singleLine="true" />

        <Button
            android:id="@+id/negativeButton"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:background="@drawable/bbuton_danger_rounded"
            android:layout_marginLeft="3dip"
            android:textColor="@color/bg_white"
            android:layout_weight="1"
            android:singleLine="true" />
    </LinearLayout>

</LinearLayout>

\res\layout\activity_main.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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginLeft="22dp"
        android:layout_marginTop="18dp"
        android:text="Button" />

</RelativeLayout>

CustomDialog.java:

package com.example.test;

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.LinearLayout;
import android.widget.TextView;

/**
 *
 * Create custom Dialog windows for your application
 * Custom dialogs rely on custom layouts wich allow you to
 * create and use your own look & feel.
 *
 * Under GPL v3 : http://www.gnu.org/licenses/gpl-3.0.html
 *
 * <a href="http://my.oschina.net/arthor" target="_blank" rel="nofollow">@author</a> antoine vianey
 *
 */
public class CustomDialog extends Dialog {

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

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

    /**
     * Helper class for creating a custom dialog
     */
    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, negativeButtonClickListener;

        public Builder(Context context) {
            this.context = context;
        }

        /**
         * Set the Dialog message from String
         * @param title
         * @return
         */
        public Builder setMessage(String message) {
            this.message = message;
            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;
        }

        /**
         * Set a custom content view for the Dialog.
         * If a message is set, the contentView is not
         * added to the Dialog...
         * @param v
         * @return
         */
        public Builder setContentView(View v) {
            this.contentView = v;
            return this;
        }

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

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

        /**
         * Set the negative button resource and it's listener
         * @param negativeButtonText
         * @param listener
         * @return
         */
        public Builder setNegativeButton(int negativeButtonText, DialogInterface.OnClickListener listener) {
            this.negativeButtonText = (String) context.getText(negativeButtonText);
            this.negativeButtonClickListener = listener;
            return this;
        }

        /**
         * Set the negative button text and it's listener
         * @param negativeButtonText
         * @param listener
         * @return
         */
        public Builder setNegativeButton(String negativeButtonText, DialogInterface.OnClickListener listener) {
            this.negativeButtonText = negativeButtonText;
            this.negativeButtonClickListener = listener;
            return this;
        }

        /**
         * Create the custom dialog
         */
        public CustomDialog create() {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            // instantiate the dialog with the custom Theme
            final CustomDialog dialog = new CustomDialog(context, R.style.Dialog);
            dialog.setCanceledOnTouchOutside(false);
            View layout = inflater.inflate(R.layout.custom_dialog_layout, null);
            dialog.addContentView(layout, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
            // set the dialog title
            ((TextView) layout.findViewById(R.id.title)).setText(title);
            // set the confirm button
            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 {
                // 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() {
                                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) layout.findViewById(R.id.message)).setText(message);
            } else if (contentView != null) {
                // if no message set
                // add the contentView to the dialog body
                ((LinearLayout) layout.findViewById(R.id.content)).removeAllViews();
                ((LinearLayout) layout.findViewById(R.id.content)).addView(contentView, new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
            }
            dialog.setContentView(layout);
            return dialog;
        }

    }

}

　　MainActivity.java:

package com.example.test;

import android.os.Bundle;
import android.app.Activity;
import android.app.Dialog;
import android.content.DialogInterface;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;

public class MainActivity extends Activity {
	private CustomDialog dialog;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		findViewById(R.id.button1).setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				CustomDialog.Builder customBuilder = new
		                CustomDialog.Builder(MainActivity.this);
		            customBuilder.setTitle("标题")
		                .setMessage("提示内容")
		                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
		                    public void onClick(DialogInterface dialog, int which) {

		                    }
		                })
		                .setPositiveButton("确定",
		                        new DialogInterface.OnClickListener() {
		                    public void onClick(DialogInterface dialog, int which) {
		                        dialog.dismiss();
		                    }
		                });
		            dialog = customBuilder.create();
		            dialog.show();
			}

		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

　　

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