Android 自定义弹出对话框AlertDialog

亦凉 2024-04-17 17:57 17阅读 0赞

# Android 自定义弹出对话框AlertDialog #

### 简介 ###

这是一个基于Dialog类封装的弹出确认框样式。

**效果图：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RyYWN5ZHJhZ29ubHh5_size_16_color_FFFFFF_t_70]

### 快速开始 ###

1.  在res/drawable目录下新建弹框样式文件 **my\_dialog\_style.xml**。

<?xml version="1.0" encoding="utf-8"?>
    <shape xmlns:android="http://schemas.android.com/apk/res/android">
    
        
        <corners android:radius="20dp" />
    
        
        <solid android:color="#FFF" />
    
    </shape>

1.  在res/values目录的styles.xml文件中自定义弹框的样式。

<style name="mdialog" parent="Theme.AppCompat.Dialog">
            
            <item name="android:windowBackground">@android:color/transparent</item>
            
            <item name="android:windowNoTitle">true</item>
            
            <item name="android:backgroundDimEnabled">true</item>
        </style>

1.  在res/layout目录下新建弹框布局文件 **my\_dialog.xml**，将布局文件的背景设置为第一步定义的样式。

> android:background="@drawable/my\_dialog\_style"

<?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:layout_gravity="center"
        android:background="@drawable/my_dialog_style"
        android:orientation="vertical">
    
        <TextView
            android:id="@+id/dialog_title"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:gravity="center"
            android:paddingTop="10dp"
            android:text="恢复默认值"
            android:textStyle="bold"
            android:textColor="#353535"
            android:textSize="18sp" />
    
        <TextView
            android:id="@+id/dialog_content"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:gravity="center"
            android:text="恢复到默认设置。"
            android:textSize="15sp"
            android:textColor="#666666"/>
    
        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#CFCFCF" />
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:gravity="center"
            android:orientation="horizontal">
    
            <TextView
                android:id="@+id/cancel"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:text="取消"
                android:textStyle="bold"
                android:textColor="#4848f5"
                android:textSize="16sp" />
    
            <View
                android:layout_width="1dp"
                android:layout_height="match_parent"
                android:background="#CFCFCF" />
    
            <TextView
                android:id="@+id/confirm"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:gravity="center"
                android:text="确定"
                android:textStyle="bold"
                android:textColor="#4848f5"
                android:textSize="16sp" />
        </LinearLayout>
    
    </LinearLayout>

1.  自定义弹框类MyDialog，继承Dialog类。

public class MyDialog extends Dialog implements View.OnClickListener {
    
        private TextView mTitle, mContent;
        private TextView mConfirm, mCancel;
    
        private Context mContext;
        private String content;
        private OncloseListener listener;
        private String positiveName;
        private String negativeName;
        private String title;
    
        public MyDialog(Context context) {
            super(context);
            this.mContext = context;
        }
    
        public MyDialog(@NonNull Context context, int themeResId, String content) {
            super(context, themeResId);
            this.mContext = context;
            this.content = content;
        }
    
        public MyDialog(@NonNull Context context, int themeResId, OncloseListener listener) {
            super(context, themeResId);
            this.mContext = context;
            this.listener = listener;
        }
    
        public MyDialog(@NonNull Context context, int themeResId, String content, OncloseListener listener) {
            super(context, themeResId);
            this.mContext = context;
            this.content = content;
            this.listener = listener;
        }
    
        protected MyDialog(@NonNull Context context, boolean cancelable, @Nullable OnCancelListener cancelListener) {
            super(context, cancelable, cancelListener);
            this.mContext = context;
        }
    
        /**
         * 设置弹框标题
         * @param title 标题内容
         * @return
         */
        public MyDialog setTitle(String title) {
            this.title = title;
            return this;
        }
    
        /**
         * 设置弹框的提示内容
         * @param content 弹框的提示内容
         * @return
         */
        public MyDialog setContent(String content) {
            this.content = content;
            return this;
        }
    
        /**
         * 设置弹框确认键的内容
         * @param name 确认键显示内容
         * @return
         */
        public MyDialog setPositiveButton(String name) {
            this.positiveName = name;
            return this;
        }
    
        /**
         * 设置弹框取消键的内容
         * @param name 取消键显示内容
         * @return
         */
        public MyDialog setNegativeButton(String name) {
            this.negativeName = name;
            return this;
        }
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.my_dialog);
            setCanceledOnTouchOutside(false);
            mTitle = findViewById(R.id.dialog_title);
            mContent = findViewById(R.id.dialog_content);
            mConfirm = findViewById(R.id.confirm);
            mCancel = findViewById(R.id.cancel);
    
            mConfirm.setOnClickListener(this);
            mCancel.setOnClickListener(this);
        }
    
        @Override
        public void onClick(View v) {
            switch (v.getId()) {
                case R.id.confirm:
                    if (listener != null) {
                        listener.onClick(true);
                    }
                    this.dismiss();
                    break;
                case R.id.cancel:
                    if (listener != null) {
                        listener.onClick(false);
                    }
                    this.dismiss();
                    break;
            }
        }
    
        public interface OncloseListener {
            void onClick(boolean confirm);
        }
    }

1.  自定义弹框的使用。

1）界面布局文件res/layout/activity\_test.xml

<?xml version="1.0" encoding="utf-8"?>
    <android.support.constraint.ConstraintLayout 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"
        tools:context=".TestActivity">
    
        <android.support.constraint.ConstraintLayout
            android:id="@+id/default_layout"
            android:layout_width="0dp"
            android:layout_height="60dp"
            android:layout_marginTop="10dp"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toBottomOf="@id/rangeBar_minus">
    
            <LinearLayout
                android:layout_width="0dp"
                android:layout_height="0dp"
                android:layout_marginStart="25dp"
                android:layout_marginEnd="25dp"
                android:layout_marginBottom="0dp"
                android:background="#dbdbdb"
                android:orientation="horizontal"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintRight_toRightOf="parent" />
    
            <TextView
                android:id="@+id/restore_defaults"
                android:layout_width="wrap_content"
                android:layout_height="20dp"
                android:layout_marginStart="30dp"
                android:gravity="center_vertical"
                android:text="恢复默认值"
                android:textColor="@android:color/black"
                android:textSize="16sp"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintBottom_toBottomOf="parent" />
    
            <ImageView
                android:layout_width="30dp"
                android:layout_height="wrap_content"
                android:src="@mipmap/next"
                android:layout_marginEnd="20dp"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintTop_toTopOf="parent"/>
    
        </android.support.constraint.ConstraintLayout>
    
    </android.support.constraint.ConstraintLayout>

1.  TestActivity.java中使用。

public class TestActivity extends AppCompatActivity {
    
        private TextView restoreDefaults;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_test);
    
            restoreDefaults = findViewById(R.id.restore_defaults);
            restoreDefaults.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    showDialog();
                }
            });
    
        }
    
        /**
         * 显示对话框
         */
        private void showDialog() {
            MyDialog dialog = new MyDialog(TestActivity.this, R.style.mdialog,
                new MyDialog.OncloseListener() {
                    @Override
                    public void onClick(boolean confirm) {
                        if (confirm) {
                            // TODO:
                        } else {
                            // TODO:
                        }
                    }
                });
            dialog.show();
        }
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RyYWN5ZHJhZ29ubHh5_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/0b94ffb61c7f4dd987fce9566987eb80.jpg