Android Studio开发学习（十）——自定义的Dialog

一、前提

自定义的Dialog在很多地方都用得上，因为不管是游戏还是其他app在效果上肯定不会局限于android studio中所给的dialog，所以很多app都实现自己的dialog

二、目标

实现一个自定义的dialog

三、内容

1、首先在activity_main中添加一个按钮

<?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:padding="10dp">

    <Button
        android:id="@+id/btn1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="text"
        android:textAllCaps="false"
        />

</LinearLayout>

2、在自定义的xml文件中布局自定义的dialog

<?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"
    android:gravity="center_horizontal"
    >

    <TextView
        android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        android:textColor="#000000"
        android:text="提示"
        android:textStyle="bold"
        android:layout_marginTop="20dp"
        />

    <TextView
        android:id="@+id/tv2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        android:textColor="#000000"
        android:text="是否删除？"
        android:layout_marginTop="20dp"
        />

    <View
        android:layout_width="match_parent"
        android:layout_height="0.5dp"
        android:layout_marginTop="10dp"
        android:background="#000000"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal">
        <TextView
        android:id="@+id/tv3"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:text="取消"
        android:textColor="#0FA8CE"
        android:textSize="20sp"
        />

        <View
            android:layout_width="0.5dp"
            android:layout_height="match_parent"
            android:background="#000000"/>

        <TextView
            android:id="@+id/tv4"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:gravity="center"
            android:text="确定"
            android:textColor="#0FA8CE"
            android:textSize="20sp"
            />
    </LinearLayout>
</LinearLayout>

3、新建一个java类，在内部实现方法，因为都是之前所提到的方法，在这里不做过多解释，其中有一段设置宽度的代码，是固定代码可直接复制去用

package com.example.sunny.dialog;

import android.content.Context;
import android.graphics.Point;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.Display;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;

/**
 * Created by Sunny on 2020/4/21.
 */
public class Dialog extends android.app.Dialog implements View.OnClickListener{

    private TextView textView1,textView2,textView3,textView4;
    private String title,message,cancel,confirm;
    private OnCancelListener cancelListener;
    private OnConfirmListener confirmListener;


    public Dialog(Context context) {
        super(context);
    }

    public Dialog(Context context, int themeResId) {
        super(context, themeResId);
    }

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

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

    public void setCancel(String cancel,OnCancelListener listener) {
        this.cancel = cancel;
        this.cancelListener=listener;
    }

    public void setConfirm(String confirm,OnConfirmListener listener) {
        this.confirm = confirm;
        this.confirmListener=listener;
    }


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.content_main);
        //设置宽度，固定代码
        WindowManager m=getWindow().getWindowManager();
        Display d=m.getDefaultDisplay();
        WindowManager.LayoutParams p=getWindow().getAttributes();
        Point size=new Point();
        d.getSize(size);
        p.width=(int)(size.x*0.8);//设置dialog的宽度为当前手机屏幕宽度*0.8
        getWindow().setAttributes(p);

        textView1= (TextView) findViewById(R.id.tv1);
        textView2= (TextView) findViewById(R.id.tv2);
        textView3= (TextView) findViewById(R.id.tv3);
        textView4= (TextView) findViewById(R.id.tv4);
        if(!TextUtils.isEmpty(title)){//不为空
            textView1.setText(title);
        }
        if(!TextUtils.isEmpty(message)){//不为空
            textView2.setText(message);
        }
        if(!TextUtils.isEmpty(cancel)){//不为空
            textView3.setText(cancel);
        }
        if(!TextUtils.isEmpty(confirm)){//不为空
            textView4.setText(confirm);
        }
        textView3.setOnClickListener(this);
        textView4.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.tv3:
                if(cancelListener!=null){
                    cancelListener.onCancel(this);
                }
                dismiss();
                break;
            case R.id.tv4:
                if(confirmListener!=null){
                    confirmListener.onConfirm(this);
                }
                dismiss();
                break;
        }
    }

    public interface OnCancelListener{
        void onCancel(Dialog dialog);
    }

    public interface OnConfirmListener{
        void onConfirm(Dialog dialog);
    }
}

4、在MainActivity中添加

package com.example.sunny.dialog;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button= (Button) findViewById(R.id.btn1);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Dialog dialog=new Dialog(MainActivity.this);
                dialog.setTitle("提示");
                dialog.setMessage("确认取消？");
                dialog.setCancel("取消", new Dialog.OnCancelListener() {
                    @Override
                    public void onCancel(Dialog dialog) {
                        ToastUtil.showMsg(MainActivity.this,"cancel");
                    }
                });
                dialog.setConfirm("确认", new Dialog.OnConfirmListener() {
                    @Override
                    public void onConfirm(Dialog dialog) {
                        ToastUtil.showMsg(MainActivity.this,"ok");
                    }
                });
                dialog.show();
            }
        });
    }
}

四、总结

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自定义的Dialog可任意实现，根据自己的创作来完成