动态添加一个view

enter.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="2000">
    <translate
        android:fromXDelta="-100%"
        android:toXDelta="0"/>
</set>


out.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="2000">
    <translate
        android:fromXDelta="0"
        android:toXDelta="-100%"/>
</set>


activity_main.xml

<?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">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

globaldialog.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="200dp"
    android:layout_height="wrap_content">

    <Button
        android:id="@+id/global_dialog_tv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="模拟全局对话框"
        android:background="@color/colorAccent"
        />
</RelativeLayout>

MainActivty代码

package com.example.globaldialog;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.RelativeLayout;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    View decorView;
    RelativeLayout v;
    Button diss;
    Animation enterAnim,outAnim;
    private  Handler h  = new Handler(new Handler.Callback() {
        @Override
        public boolean handleMessage(@NonNull Message message) {
            v.startAnimation(enterAnim);
            return false;
        }
    });
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        decorView = getWindow().getDecorView();
        enterAnim = AnimationUtils.loadAnimation(this, R.animator.enter);
        outAnim = AnimationUtils.loadAnimation(this, R.animator.out);
        FrameLayout contentParent = (FrameLayout) decorView.findViewById(android.R.id.content);
        v = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.globaldialog,null);
        diss = (Button)v.getChildAt(0);
        contentParent.addView(v);
        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams)v.getLayoutParams();
        lp.topMargin = 400;
        v.setVisibility(View.INVISIBLE);
        lp.width=400;
        h.sendEmptyMessageDelayed(0,5000);
        enterAnim.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {
                v.setVisibility(View.VISIBLE);
            }

            @Override
            public void onAnimationEnd(Animation animation) {

            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });

        outAnim.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                v.setVisibility(View.INVISIBLE);
            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });

        diss.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                diss.startAnimation(outAnim);
                Toast.makeText(MainActivity.this,"hell",Toast.LENGTH_SHORT).show();
            }
        });
    }



}