弹窗之三：自定义Dialog

第一步: 给Dialog设置一个风格主题

（基本都是用这个主题）无边框全透明背景：

res/values/styles:

    --自定义dialog背景全透明无边框theme -->
    

第二步：给自定义的Dialog设置自定义的 xml界面

比如：title+message+确定按钮、取消按钮

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="260dp"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:background="@drawable/dialog_bg"
        android:orientation="vertical">

        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_margin="15dp"
            android:gravity="center"
            android:text="消息提示"
            android:textColor="#38ADFF"
            android:textSize="16sp" />

        <TextView
            android:id="@+id/message"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:text="提示消息" />

        <View
            android:layout_width="match_parent"
            android:layout_height="1px"
            android:layout_marginTop="15dp"
            android:background="#E4E4E4" />

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

            <Button
                android:id="@+id/no"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_marginLeft="10dp"
                android:layout_weight="1"
                android:background="@null"
                android:gravity="center"
                android:singleLine="true"
                android:text="No"
                android:textColor="#7D7D7D"
                android:textSize="16sp" />

            <View
                android:layout_width="1px"
                android:layout_height="match_parent"
                android:background="#E4E4E4" />

            <Button
                android:id="@+id/yes"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_marginRight="10dp"
                android:layout_weight="1"
                android:background="@null"
                android:gravity="center"
                android:singleLine="true"
                android:text="Yes"
                android:textColor="#38ADFF"
                android:textSize="16sp" />
        LinearLayout>
    LinearLayout>

RelativeLayout>

dialog_bg.xml如下：

<shape xmlns:android="http://schemas.android.com/apk/res/android">

    <solid android:color="#ffffff" />
    
    <corners android:radius="6dp" />

shape>

第三步：继承Dialog实现自定义的Dialog

public class CustomDialog extends Dialog {

    private Button yes;
    private Button no;
    private TextView titleTv;
    private TextView messageTv;
    private String titleStr;
    private String messageStr;
    private String yesStr, noStr;

    /*  -------------------------------- 接口监听 -------------------------------------  */

    private onNoOnclickListener noOnclickListener;
    private onYesOnclickListener yesOnclickListener;

    public interface onYesOnclickListener {
        void onYesClick();
    }

    public interface onNoOnclickListener {
        void onNoClick();
    }

    public void setNoOnclickListener(String str, onNoOnclickListener onNoOnclickListener) {
        if (str != null) {
            noStr = str;
        }
        this.noOnclickListener = onNoOnclickListener;
    }

    public void setYesOnclickListener(String str, onYesOnclickListener onYesOnclickListener) {
        if (str != null) {
            yesStr = str;
        }
        this.yesOnclickListener = onYesOnclickListener;
    }

    /*  ---------------------------------- 构造方法 -------------------------------------  */

    public CustomDialog(Context context) {
        super(context, R.style.MyDialog);//风格主题
    }


    /*  ---------------------------------- onCreate-------------------------------------  */

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.custom_dialog_layout);//自定义布局
        //按空白处不能取消动画
//        setCanceledOnTouchOutside(false);

        //初始化界面控件
        initView();
        //初始化界面数据
        initData();
        //初始化界面控件的事件
        initEvent();

    }

    /**
     * 初始化界面的确定和取消监听器
     */
    private void initEvent() {
        //设置确定按钮被点击后，向外界提供监听
        yes.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (yesOnclickListener != null) {
                    yesOnclickListener.onYesClick();
                }
            }
        });
        //设置取消按钮被点击后，向外界提供监听
        no.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (noOnclickListener != null) {
                    noOnclickListener.onNoClick();
                }
            }
        });
    }

    /**
     * 初始化界面控件的显示数据
     */
    private void initData() {
        //如果用户自定了title和message
        if (titleStr != null) {
            titleTv.setText(titleStr);
        }
        if (messageStr != null) {
            messageTv.setText(messageStr);
        }
        //如果设置按钮的文字
        if (yesStr != null) {
            yes.setText(yesStr);
        }
        if (noStr != null) {
            no.setText(noStr);
        }
    }

    /**
     * 初始化界面控件
     */
    private void initView() {
        yes = (Button) findViewById(R.id.yes);
        no = (Button) findViewById(R.id.no);
        titleTv = (TextView) findViewById(R.id.title);
        messageTv = (TextView) findViewById(R.id.message);
    }

    /*  ---------------------------------- set方法 传值-------------------------------------  */
//为外界设置一些public 公开的方法，来向自定义的dialog传递值
    public void setTitle(String title) {
        titleStr = title;
    }

    public void setMessage(String message) {
        messageStr = message;
    }


}

第四步：activity中调用：

                final CustomDialog customDialog = new CustomDialog(MainActivityI.this);
                customDialog.setTitle("提示");
                customDialog.setMessage("确定退出应用?");
                customDialog.show();

                customDialog.setYesOnclickListener("确定", new CustomDialog.onYesOnclickListener() {
                    @Override
                    public void onYesClick() {
                        Toast.makeText(MainActivityI.this, "点击了--确定--按钮", Toast.LENGTH_LONG).show();
                        customDialog.dismiss();
                    }
                });
                customDialog.setNoOnclickListener("取消", new CustomDialog.onNoOnclickListener() {
                    @Override
                    public void onNoClick() {
                        Toast.makeText(MainActivityI.this, "点击了--取消--按钮", Toast.LENGTH_LONG).show();
                        customDialog.dismiss();
                    }
                });

效果如图：

参考：自定义Dialog的简单实现

1、设置标题和内容可以使用构造方法
2、监听确定和取消事件可以使用一个接口：

如下

1、dialog布局：

注意最外层的宽度为match_parent，方便后面修改宽度

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:background="@drawable/dialog_bg"
    android:orientation="vertical">

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_margin="15dp"
        android:gravity="center"
        android:text="消息提示"
        android:textColor="#38ADFF"
        android:textSize="16sp" />

    <TextView
        android:id="@+id/message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:text="提示消息" />

    <View
        android:layout_width="match_parent"
        android:layout_height="1px"
        android:layout_marginTop="15dp"
        android:background="#E4E4E4" />

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

        <Button
            android:id="@+id/no"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginLeft="10dp"
            android:layout_weight="1"
            android:background="@null"
            android:gravity="center"
            android:singleLine="true"
            android:text="No"
            android:textColor="#7D7D7D"
            android:textSize="16sp" />

        <View
            android:layout_width="1px"
            android:layout_height="match_parent"
            android:background="#E4E4E4" />

        <Button
            android:id="@+id/yes"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_marginRight="10dp"
            android:layout_weight="1"
            android:background="@null"
            android:gravity="center"
            android:singleLine="true"
            android:text="Yes"
            android:textColor="#38ADFF"
            android:textSize="16sp" />
    LinearLayout>
LinearLayout>

2、定义dialog：

public class MyDialog extends Dialog {

    private Context context;
    private String message;
    private String title;
    private String confirmButtonText;
    private String cacelButtonText;

    /* ----------------------------------接口监听---------------------------------------- */

    private ClickListenerInterface clickListenerInterface;

    public interface ClickListenerInterface {
        void doConfirm();

        void doCancel();
    }

    public void setClickListener(ClickListenerInterface clickListenerInterface) {
        this.clickListenerInterface = clickListenerInterface;
    }

    /* ----------------------------------构造方法：传值------------------------------------- */

    public MyDialog(Context context, String title, String message, String confirmButtonText, String cacelButtonText) {
        super(context, R.style.MyDialog);

        this.context = context;
        this.title = title;
        this.message = message;
        this.confirmButtonText = confirmButtonText;
        this.cacelButtonText = cacelButtonText;
    }


    /* ----------------------------------  onCreate  ------------------------------------- */

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        init();
    }

    @SuppressWarnings("ConstantConditions")
    @SuppressLint("InflateParams")
    public void init() {
        setContentView(R.layout.my_dialog);

        TextView tvTitle = (TextView) findViewById(R.id.title);
        TextView tvMessage = (TextView) findViewById(R.id.message);
        TextView tvConfirm = (TextView) findViewById(R.id.yes);
        TextView tvCancel = (TextView) findViewById(R.id.no);

        tvTitle.setText(title);
        tvMessage.setText(message);
        tvConfirm.setText(confirmButtonText);
        tvCancel.setText(cacelButtonText);

        tvConfirm.setOnClickListener(new clickListener());
        tvCancel.setOnClickListener(new clickListener());

        setCanceledOnTouchOutside(false);//设置窗口外是否可关闭

        setOnKeyListener(new DialogInterface.OnKeyListener() {//设置按back键不关闭
            @Override
            public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
                return keyCode == KeyEvent.KEYCODE_BACK;
            }
        });

        Window dialogWindow = getWindow();
        if (dialogWindow != null) {
            dialogWindow.setGravity(Gravity.BOTTOM | Gravity.CENTER);//设置窗口位置
            dialogWindow.setWindowAnimations(R.style.dialogWindowAnim); //设置窗口进出动画

            WindowManager.LayoutParams lp = dialogWindow.getAttributes();
            DisplayMetrics d = context.getResources().getDisplayMetrics(); // 获取屏幕宽、高
            if (lp != null) {
                lp.width = (int) (d.widthPixels * 0.7); // 设置为屏幕宽度
            }
            dialogWindow.setAttributes(lp);
        }
    }

    private class clickListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            switch (v.getId()) {
                case R.id.yes:
                    clickListenerInterface.doConfirm();
                    break;
                case R.id.no:
                    clickListenerInterface.doCancel();
                    break;
            }
        }
    }

}

3、activity调用：

  final MyDialog myDialog = new MyDialog(MainActivityI.this, "提示", "确定要退出吗?", "退出", "取消");
                myDialog.show();

                myDialog.setClickListener(new MyDialog.ClickListenerInterface() {
                    @Override
                    public void doConfirm() {
                        Toast.makeText(MainActivityI.this, "点击了--确定--按钮", Toast.LENGTH_LONG).show();
                        myDialog.dismiss();
                    }

                    @Override
                    public void doCancel() {
                        Toast.makeText(MainActivityI.this, "点击了--取消--按钮", Toast.LENGTH_LONG).show();
                        myDialog.dismiss();
                    }
                });

4、动画：

res/values/styles:

    
    <style name="dialogWindowAnim" mce_bogus="1" parent="android:Animation">
        <item name="android:windowEnterAnimation">@anim/animator_dialog_in
        "android:windowExitAnimation">@anim/animator_dialog_out
    style>

animator_dialog_in

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="400"
        android:fromXDelta="100%"
        android:toXDelta="0" />
set>

animator_dialog_out

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="400"
        android:fromXDelta="0"
        android:toXDelta="-100%" />
set>

效果如图：

参考：Android自定义Dialog

其他：

如果对话框需要添加动画，推荐使用dialogFragment，自定义dialog添加动画，在按home键后会自动执行动画。监听back键相同。