Android自定义Dialog对话框

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前言

Android项目经常需要使用对话框来进行交互，本文将介绍一个简单自定义的Dialog案例

效果图

代码部分

自定义Dialog布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MyDialog"
    android:background="@drawable/dialog_layout">

    <TextView
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="#000"
        android:text="提示"
        android:textStyle="bold"
        android:textSize="24sp"
        android:gravity="center"
        android:padding="10dp"/>

    <TextView
        android:id="@+id/message"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:textColor="#000"
        android:padding="20dp"
        android:gravity="center"
        android:text="删除"/>

    <View
        android:layout_width="match_parent"
        android:layout_height="0.5dp"
        android:background="#000"
        ></View>

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

        <TextView
            android:padding="10dp"
            android:id="@+id/canel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="#11c2ee"
            android:textSize="24sp"
            android:gravity="center"/>
            
        <View
            android:layout_width="0.5dp"
            android:layout_height="match_parent"
            android:background="#000">
           </View>

        <TextView
            android:padding="10dp"
            android:id="@+id/confirm"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#11c2ee"
            android:layout_weight="1"
            android:textSize="24sp"
            android:gravity="center"
           />
    </LinearLayout>
</LinearLayout>

自定义Dialog背景(圆角)

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    //内部填充色
    <solid android:color="#ffffff"></solid>
    //圆角半径
    <corners android:radius="20dp"></corners>
</shape>

通过style样式引用

<style name="MyDialog" parent="android:style/Theme.Dialog">
        <!--背景颜色及和透明程度-->
        <item name="android:windowBackground">@android:color/transparent</item>
        <!--是否去除标题 -->
        <item name="android:windowNoTitle">true</item>
        <!--是否去除边框-->
        <item name="android:windowFrame">@null</item>
        <!--是否浮现在activity之上-->
        <item name="android:windowIsFloating">true</item>
        <!--是否模糊-->
        <item name="android:backgroundDimEnabled">true</item>
    </style>

自定义Dialog类

package cn.sr.alertdialogdemo;

import android.app.Dialog;
import android.content.Context;
import android.graphics.Point;
import android.support.annotation.NonNull;
import android.os.Bundle;
import android.view.Display;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;

public class MyDialog extends Dialog implements View.OnClickListener{

    private TextView mTitle,mMessage,mCanel,mConfirm;
    private String title,message,canel,confirm;
    private OnCancelListtener onCancelListtener;
    private OnConfirmListtener onConfirmListtener;

    public MyDialog setTitle(String title) {
        this.title = title;
        return this;
    }

    public MyDialog setMessage(String message) {
        this.message = message;
        return this;
    }

    public MyDialog setCanel(String canel,OnCancelListtener onCancelListtener) {
        this.canel = canel;
        this.onCancelListtener = onCancelListtener;
        return this;
    }

    public MyDialog setConfirm(String confirm,OnConfirmListtener onConfirmListtener) {
        this.confirm = confirm;
        this.onConfirmListtener = onConfirmListtener;
        return this;
    }


    public MyDialog(@NonNull Context context) {
        super(context);
    }

    public MyDialog(@NonNull Context context,int themeId) {
        super(context,themeId);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my_dialog);

        //如果对话框宽度异常，可以通过下方代码根据设备的宽度来设置弹窗宽度
        WindowManager windowManager = getWindow().getWindowManager();
        Display display = windowManager.getDefaultDisplay();
        WindowManager.LayoutParams params = getWindow().getAttributes();
        Point point=new Point();
        display.getSize(point);
        params.width= (int) (point.x * 0.8);
        getWindow().setAttributes(params);

        mTitle=findViewById(R.id.title);
        mMessage=findViewById(R.id.message);
        mCanel=findViewById(R.id.canel);
        mConfirm=findViewById(R.id.confirm);

        mCanel.setOnClickListener(this);
        mConfirm.setOnClickListener(this);

        mTitle.setText(title);
        mMessage.setText(message);
        mCanel.setText(canel);
        mConfirm.setText(confirm);


    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.canel:
              if(onCancelListtener != null){
                  onCancelListtener.onCancel(this);
              }
                dismiss();
                break;

            case R.id.confirm:
                if(onConfirmListtener != null){
                    onConfirmListtener.onConfirm(this);
                }
                dismiss();
                break;
        }
    }
    //自定义接口形式提供回调方法
    public interface OnCancelListtener{
        void onCancel(MyDialog myDialog);
    }
    public interface OnConfirmListtener{
        void onConfirm(MyDialog myDialog);
    }
}

调用演示

public class MainActivity extends AppCompatActivity {

    private Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button=findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                MyDialog myDialog=new MyDialog(MainActivity.this);
                myDialog.setTitle("提示").setMessage("这是一个自定义的Dialog").setCanel("取消", new MyDialog.OnCancelListtener() {
                    @Override
                    public void onCancel(MyDialog myDialog) {
                        Toast.makeText(MainActivity.this,"点击了取消按钮",Toast.LENGTH_SHORT).show();
                    }
                }).setConfirm("确认", new MyDialog.OnConfirmListtener() {
                    @Override
                    public void onConfirm(MyDialog myDialog) {
                        Toast.makeText(MainActivity.this,"点击了确认按钮",Toast.LENGTH_SHORT).show();
                    }
                }).show();
            }
        });
    }
}

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