Android学习07

自定义Dialog

创建一个Java类CustomDialog继承Dialog。

package com.example.helloworld.widget;

import android.app.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;

import androidx.annotation.NonNull;

import com.example.helloworld.R;

public class CustomDialog extends Dialog implements View.OnClickListener {

    private TextView mTvTitle,mTvMessage,mTvCancel,mTvConfirm;
    private String title,message,cancel,confirm;
    private IOnCancelListener cancelListener;  //取消按钮被点击了的监听器
    private IOnConfirmlListener confirmlListener;  //确定按钮被点击了的监听器

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

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

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

    public CustomDialog setCancel(String cancel,IOnCancelListener listener) {
        this.cancel = cancel;
        this.cancelListener = listener;
        return this;
    }

    public CustomDialog setConfirm(String confirm,IOnConfirmlListener listener) {
        this.confirm = confirm;
        this.confirmlListener = listener;
        return this;
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_custom_dialog);
        //空白处不能取消动画
        setCanceledOnTouchOutside(false);

        //设置宽度
        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的宽度*0.8
        getWindow().setAttributes(p);

        mTvTitle = findViewById(R.id.tv_title);
        mTvMessage = findViewById(R.id.tv_message);
        mTvCancel = findViewById(R.id.tv_cancel);
        mTvConfirm = findViewById(R.id.tv_confirm);
        if (!TextUtils.isEmpty(title)){
            mTvTitle.setText(title);
        }
        if (!TextUtils.isEmpty(message)){
            mTvMessage.setText(message);
        }
        if (!TextUtils.isEmpty(cancel)){
            mTvCancel.setText(cancel);
        }
        if (!TextUtils.isEmpty(confirm)){
            mTvConfirm.setText(confirm);
        }
        //设置取消和确定的监听事件
        mTvCancel.setOnClickListener(this);
        mTvConfirm.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.tv_cancel:
                if (cancelListener!=null){
                    cancelListener.onCancel(this);
                }
                break;
            case R.id.tv_confirm:
                if (confirmlListener!=null){
                    confirmlListener.onConfirm(this);
                }
                break;
        }
    }
//回调接口
    public interface IOnCancelListener{
        void onCancel(CustomDialog dialog);
    }
    public interface IOnConfirmlListener{
        void onConfirm(CustomDialog dialog);
    }
}

activity_custom.xml:

<?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:padding="15dp">

    <Button
        android:id="@+id/btn_custom_dialog"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="自定义Dialog"
        android:textAllCaps="false"/>

</LinearLayout>

在drawable中新建bg_custom_dialog.xml设置边框：

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <solid android:color="#ffffff" />
    <stroke
        android:width="0.8dp"
        android:color="#ffffff" />
    <!-- 圆角 -->
    <corners android:radius="6dp" />
</shape>

新建layout文件，layout_custom_dialog.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:background="@drawable/bg_custom_dialog">

    <TextView
        android:id="@+id/tv_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30sp"
        android:textColor="#000"
        android:text="提示"
        android:textStyle="bold"
        android:layout_marginTop="15dp"/>

    <TextView
        android:id="@+id/tv_message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="30sp"
        android:textColor="#000"
        android:text="删除？"
        android:layout_marginTop="20dp"
        android:layout_marginBottom="20dp"/>

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="#3CA9C4"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/tv_cancel"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:text="取消"
            android:textSize="20sp"
            android:textColor="#3CA9C4"
            android:gravity="center"/>

        <View
            android:layout_width="1dp"
            android:layout_height="match_parent"
            android:background="#3CA9C4"/>

        <TextView
            android:id="@+id/tv_confirm"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:text="确定"
            android:textSize="20sp"
            android:textColor="#3CA9C4"
            android:gravity="center"/>

    </LinearLayout>

</LinearLayout>

CustomActivity:

package com.example.helloworld;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.example.helloworld.widget.CustomDialog;

public class CustomDialogActivity extends AppCompatActivity {

    private Button mBtnDialog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_custom);
        mBtnDialog = findViewById(R.id.btn_custom_dialog);
        mBtnDialog.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final CustomDialog customDialog = new CustomDialog(CustomDialogActivity.this);
                customDialog.setTitle("提示").setMessage("确认删除？")
                        .setCancel("取消", new CustomDialog.IOnCancelListener() {
                    @Override
                    public void onCancel(CustomDialog dialog) {
                        Toast.makeText(CustomDialogActivity.this, "取消", Toast.LENGTH_SHORT).show();
                        customDialog.dismiss();

                    }
                })
                        .setConfirm("确认", new CustomDialog.IOnConfirmlListener() {
                    @Override
                    public void onConfirm(CustomDialog dialog) {
                        Toast.makeText(CustomDialogActivity.this, "确定", Toast.LENGTH_SHORT).show();
                        customDialog.dismiss();
                    }
                }).show();
            }
        });
    }
}

运行截图：