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转载请标明出处：http://www.jianshu.com/p/2cbf5bf3842e

概述

为了应对产品的变化多端的需求,于是封装了一个自定义dialog,话不多说上Demo先:
https://github.com/zh-xiao/CustomDialog

需求分析

自定义dialog至少应该提供的接口

• 设置自定义布局(这里我放在构造方法里)
• 设置标题(这里我用一个set方法)
• 设置内容(这里我用一个set方法)
• 设置确定和取消的点击事件(先通过定义接口的方式,定义一个确定事件的监听器和一个取消事件的监听器,再通过构造方法传入自定义类)

CustomDialog:

public class CustomDialog extends Dialog {

    private TextView mTitle;
    private TextView mContent;
    private Button mCancel;
    private Button mConfirm;

    private int mLayoutId;
    private OnConfirmListener mConfirmListener;
    private OnCancleListener mCancelListener;
    private String mTitleString;
    private String mContentString;

    /**
     * 构造方法
     * @param context
     * @param layoutId 布局文件id
     * @param confirmListener 点击确定对应的监听器
     * @param cancelListener 点击取消对应的监听器
     */
    public CustomDialog(Context context,int layoutId,OnConfirmListener confirmListener,OnCancleListener cancelListener) {
        super(context, R.style.MyDialog);
        mConfirmListener=confirmListener;
        mCancelListener=cancelListener;
        mLayoutId=layoutId;
    }

    //点击确定对应的监听器
    public interface OnConfirmListener {
        void onConfirm();
    }

    //点击取消对应的监听器
    public interface OnCancleListener {
        void onCancle();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(mLayoutId);
        mTitle= (TextView) findViewById(R.id.title);
        mContent= (TextView) findViewById(R.id.content);
        mCancel = (Button) findViewById(R.id.cancle);
        mConfirm= (Button) findViewById(R.id.confirm);
        mTitle.setText(mTitleString);
        mContent.setText(mContentString);
        mCancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mCancelListener.onCancle();
            }
        });
        mConfirm.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mConfirmListener.onConfirm();
            }
        });
    }

    /**
     * 设置对话框标题
     * @param title
     * @return
     */
    public CustomDialog setTitle(String title){
        mTitleString=title;
        return this;
    }

    /**
     * 设置对话框内容
     * @param content
     * @return
     */
    public CustomDialog setContent(String content){
        mContentString=content;
        return this;
    }

}

dialog_custom:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="250dp"
              android:layout_height="wrap_content"
              android:layout_gravity="center"
              android:background="@drawable/dialog_bg"
              android:gravity="center"
              android:orientation="vertical">

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:text="title"
        android:textSize="20sp"
        android:textStyle="bold"/>

    <TextView
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="content"
        android:textSize="20sp"/>

    <View
        android:layout_width="match_parent"
        android:layout_height="1px"
        android:background="#000000"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="40dp">

        <Button
            android:id="@+id/cancle"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="center_vertical"
            android:layout_weight="1"
            android:background="@drawable/selector_left_button"
            android:gravity="center"
            android:text="cancle"
            android:textColor="#3980D1"/>

        <View
            android:layout_width="1px"
            android:layout_height="match_parent"
            android:background="#000000"/>

        <Button
            android:id="@+id/confirm"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="center_vertical"
            android:layout_weight="1"
            android:background="@drawable/selector_right_button"
            android:gravity="center"
            android:text="confirm"
            android:textColor="#3980D1"/>

    </LinearLayout>

</LinearLayout>

MainActivity:

public class MainActivity extends AppCompatActivity {
    private Button mButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mButton = (Button) findViewById(R.id.btn);
        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new CustomDialog(MainActivity.this, R.layout.dialog_custom, new CustomDialog.OnConfirmListener() {
                    @Override
                    public void onConfirm() {
                        Toast.makeText(MainActivity.this, "confirm", Toast.LENGTH_SHORT).show();
                    }
                }, new CustomDialog.OnCancleListener() {
                    @Override
                    public void onCancle() {
                        Toast.makeText(MainActivity.this, "cancel", Toast.LENGTH_SHORT).show();
                    }
                })
                        .setTitle("this is Title")
                        .setContent("this is Content! this is Content!")
                        .show();
            }
        });
    }
}

activity_main:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    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="com.example.xiao.customdialog.MainActivity">

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"/>
</RelativeLayout>

总结:

可以看到CustomDialog使用起来非常简洁,直接new出来,传入context,layoutId,OnConfirmListener,OncancleListener,接着流式set/set/show.是不是超简单.O(∩_∩)O.