由于项目的需要，系统的弹出框已经不能满足我们的需求，我们需要各式各样的弹出框，这时就需要我们去自定义弹出框了。

新建布局文件 dialog_layout.xml,将下面内容复制进去

<?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="match_parent"
    android:orientation="vertical" >

<LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="5dp"
        android:background="@drawable/shape_linearlayout"
        android:orientation="vertical"
        >

<LinearLayout
            android:layout_width="match_parent"
            android:layout_height="150dp"
            android:gravity="center_vertical"
            android:orientation="vertical" >

<TextView
                android:id="@+id/txt_dialog_message"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:layout_marginLeft="20dp"
                android:layout_marginRight="20dp"
                android:text="TextView" />
        </LinearLayout>

<View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="@color/line" />

<LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:layout_marginRight="5dp"
            android:layout_marginBottom="1dp" >

<Button
                android:id="@+id/btn_dialog_go"
                android:layout_width="0dp"
                android:layout_height="40dp"
                android:layout_weight="1"
                android:background="@drawable/linearlayout"
                android:text="确定"
                android:textColor="@color/blue" />

<View
                android:id="@+id/dialog_bg"
                android:layout_width="1dp"
                android:layout_height="40dp"
                android:background="@color/line" />

<Button
                android:id="@+id/btn_dialog_add"
                android:layout_width="0dp"
                android:layout_height="40dp"
                android:layout_weight="1"
                android:background="@drawable/linearlayout"
                android:text="取消"
                android:textColor="@color/blue" />
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

新建java类DialogUtil.java

public class DialogUtil {

private static DialogUtil dialogUtil;
    private Dialog dialog;
    private TextView message;
    private Button firstBtn;
    private Button secondBtn;
    private onButtnClickListener buttnClickListener;

public static DialogUtil getDialogInstance(Context context) {
        if (null == dialogUtil) {
            dialogUtil = new DialogUtil(context);
        }
        return dialogUtil;
    }

private DialogUtil(Context context) {
        initDialog(context);
    }

public void setMessage(String message) {
        if (null != message && !message.equals("")) {
            this.message.setText(message);
        }

}

private void initDialog(Context context) {
        dialog = new Dialog(context);

dialog.setContentView(R.layout.dialog_layout);
        dialog.setCanceledOnTouchOutside(false);
        Window window = dialog.getWindow();
        dialog.setCanceledOnTouchOutside(true);
        WindowManager.LayoutParams params = window.getAttributes();
        params.width = ScreenUtils.getScreenWidth(context)
                - ScreenUtils.getScreenWidth(context) / 4;
        params.height = LayoutParams.WRAP_CONTENT;
        params.gravity = Gravity.CENTER;
        window.setAttributes(params);
        window.setWindowAnimations(R.style.displayStyle);
        message = (TextView) dialog.findViewById(R.id.txt_dialog_message);
        firstBtn = (Button) dialog.findViewById(R.id.btn_dialog_go);
        secondBtn = (Button) dialog.findViewById(R.id.btn_dialog_add);
        firstBtn.setOnClickListener(new OnClickListener() {

@Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if (null != buttnClickListener)
                    buttnClickListener.onFirstBtnClick(v);
            }
        });
        secondBtn.setOnClickListener(new OnClickListener() {

@Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if (null != buttnClickListener)
                    buttnClickListener.onSecondBtnClick(v);
            }
        });
    }

public void showDialog() {
        if (dialog != null && !dialog.isShowing()) {
            dialog.show();
        }
    }

public void dissmissDialog() {
        if (dialog != null && dialog.isShowing()) {
            dialog.dismiss();
           
        }
    }

public void setOnButtnClickListener(onButtnClickListener buttnClickListener) {
        this.buttnClickListener = buttnClickListener;
    }

public interface onButtnClickListener {
        public void onFirstBtnClick(View v);

public void onSecondBtnClick(View v);
    }

}

dialog工具类采用的是单列的模式，调用的流程是

1、先获取对象

DialogUtil.getDialogInstance(context);

2、设置文本信息

setMessage(String message);

3、设置按钮的单机事件

setOnButtnClickListener(onButtnClickListener buttnClickListener);

4、显示dialog

showDialog();

至此自定义弹出框就完成了