Android -- 自定义Dialog

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　　设计视图

<?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:gravity="center_horizontal"
    android:orientation="vertical">

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

    <TextView
        android:id="@+id/tv_message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:textColor="#000000"
        android:text="删除"
        android:layout_marginTop="20dp"
        android:layout_marginBottom="20dp"/>

    <view
        android:layout_width="match_parent"
        android:layout_height="0.5dp"
        android:background="#817F7F"/>

    <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="#A62518BB"
            android:gravity="center"/>

        <view
            android:layout_width="0.5dp"
            android:layout_height="match_parent"
            android:background="#A3A3A3"/>
        <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="#A62518BB"
            android:gravity="center"/>
    </LinearLayout>
</LinearLayout>

　　设计自定义的类

public class CustomDialog extends Dialog implements View.OnClickListener {

    private TextView mTvTitle,mTvMessage,mTvCancel,mTvConfirm;
    private String title,message,cancel,confirm;
    private IOnCancelListener cancelListener;
    private IOnConfirmListener confirmListener;

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

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

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

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

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

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

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

        //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);
        }
        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);
                }
                dismiss();
                break;
            case R.id.tv_confirm:
                if(confirmListener != null){
                    confirmListener.onConfirm(this);
                }
                dismiss();
                break;
        }
    }

    public interface IOnCancelListener{
        void onCancel(CustomDialog dialog);
    }
    public interface IOnConfirmListener{

        void onConfirm(CustomDialog dialog);
    }
}