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