设置Dialog弹窗位置

1、弹窗Dialog
package com.lee.len.test.dialogdemo;

import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;

/**
 * @description:屏幕保洁
 * @copyright: Copyright (c) 厦门立林科技有限公司
 * @author: lw
 * @date: 2021/5/25 10:25
 */
public class ScreenCleanDialog extends Dialog{

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

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

2、弹窗布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="200dp"
    android:layout_height="200dp"
    android:orientation="vertical"
    android:gravity="center">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="你好"
      />
</LinearLayout>

3、调用Dialog的Activity

package com.lee.len.test.dialogdemo;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    private Button btnShowDialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnShowDialog = findViewById(R.id.btnShowDialog);
        btnShowDialog.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog();
            }
        });
    }

    private void showDialog() {
        ScreenCleanDialog dialog=new ScreenCleanDialog(MainActivity.this);

        //拿到LayoutParams，其实也就类似常用的FrameLayout.LayoutParams这种
        WindowManager.LayoutParams localLayoutParams = dialog.getWindow().getAttributes();

        //这里就是设置gravity位置了
        localLayoutParams.gravity = Gravity.TOP | Gravity.START;

        //xy就是弹窗位置，这个位置可以自己随便写
        localLayoutParams.x =500;
        localLayoutParams.y = 100;

        dialog.getWindow().setAttributes(localLayoutParams);

        dialog.show();
    }
}

4、MainActivity的布局

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal"
        android:gravity="center">
        <Button
            android:id="@+id/btnShowDialog"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="弹窗"/>
    </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>