Android笔记之自定义对话框

效果如下图

对话框布局

dialog_uninstallation_confirmation.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="match_parent"

    android:layout_height="match_parent"

    android:layout_marginLeft="15dp"

    android:layout_marginRight="15dp"

    android:background="@drawable/uninstallation_dialog_background"

    android:orientation="vertical">

    <ImageView

        android:id="@+id/iconImageView"

        android:layout_width="match_parent"

        android:layout_height="45dp"

        android:layout_gravity="center"

        android:layout_marginTop="25dp"

        android:layout_marginBottom="30dp"

        tools:src="@mipmap/ic_launcher" />

    <TextView

        android:id="@+id/messageTextView"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:gravity="center"

        android:textColor="@android:color/black"

        tools:text="是否卸载CustomDialog" />

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="40dp"

        android:layout_marginBottom="15dp">

        <TextView

            android:id="@+id/cancelTextView"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_marginLeft="15dp"

            android:layout_marginRight="5dp"

            android:layout_weight="1"

            android:background="@drawable/uninstallation_dialog_button_background"

            android:gravity="center"

            android:padding="18dp"

            android:text="取消"

            android:textColor="@android:color/black" />

        <TextView

            android:id="@+id/uninstallTextView"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_marginLeft="5dp"

            android:layout_marginRight="15dp"

            android:layout_weight="1"

            android:background="@drawable/uninstallation_dialog_button_background"

            android:gravity="center"

            android:padding="18dp"

            android:text="卸载"

            android:textColor="#FF0000" />

    </LinearLayout>

</LinearLayout>

自定义的对话框类

UninstallationConfirmationDialog.java

package com.bu_ish.custom_dialog_example;

import android.app.Dialog;

import android.content.Context;

import android.os.Bundle;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

import android.widget.ImageView;

import android.widget.TextView;

public abstract class UninstallationConfirmationDialog extends Dialog {

    private ImageView iconImageView;

    private TextView messageTextView;

    private int iconResId;

    private String message;

    public abstract void onCancelClicked();

    public abstract void onUninstallClicked();

    public UninstallationConfirmationDialog(Context context) {

        super(context, R.style.UninstallationConfirmationDialog);

    }

    public UninstallationConfirmationDialog setIcon(int resId) {

        this.iconResId = resId;

        return this;

    }

    public UninstallationConfirmationDialog setMessage(String message) {

        this.message = message;

        return this;

    }

    @Override

    public void show() {

        super.show();

        Window window = getWindow();

        WindowManager.LayoutParams layoutParams = window.getAttributes();

        layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;

        window.setAttributes(layoutParams);

    }

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.dialog_uninstallation_confirmation);

        iconImageView = findViewById(R.id.iconImageView);

        messageTextView = findViewById(R.id.messageTextView);

        iconImageView.setImageResource(iconResId);

        messageTextView.setText(message);

        findViewById(R.id.cancelTextView).setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                onCancelClicked();

                dismiss();

            }

        });

        findViewById(R.id.uninstallTextView).setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                onUninstallClicked();

                dismiss();

            }

        });

    }

}

对话框style

    <style name="UninstallationConfirmationDialog" parent="@android:style/Theme.Dialog">

        <item name="android:windowNoTitle">true</item>

        <item name="android:windowBackground">@android:color/transparent</item>

    </style>

P.S.

对话框默认风格是带标题的，通过windowNoTitle设置为无标题

为保证对话框宽度与屏幕匹配，须通过Window.setAttributes(WindowManager.LayoutParams)设置宽度

完整Demo链接：https://pan.baidu.com/s/1RItjQZ7v1xMHL7b5C6lLzw，提取码：qbwu