Android Studio学习（十三）-动画

一.逐帧动画

1.新建frame.xml存放照片

2.activity_main.xml设置样式

3.MainActivity.java调用动画

package com.example.myapplication;

import androidx.appcompat.app.alertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.app.NotificationCompat;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.StaggeredGridLayoutManager;

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.AnimationDrawable;
import android.media.audiofx.DynamicsProcessing;
import android.nfc.Tag;
import android.os.Build;
import android.os.Bundle;
import android.provider.FontsContract;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupMenu;
import android.widget.PopupWindow;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;


import java.util.ArrayList;
import java.util.List;

import javax.security.auth.login.LoginException;

public class MainActivity extends AppCompatActivity {
    private boolean flag=true;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);//R文件自动生成，不可修改，创建的资源都会在R文件中生成一个索引

        RelativeLayout relativeLayout = findViewById(R.id.rl);
        //得到布局
        final AnimationDrawable anim = (AnimationDrawable) relativeLayout.getBackground();//得到背景图
        relativeLayout.setonClickListener(new View.onClickListener() {//给背景图设置监听
            @Override
            public void onClick(View view) {
                if(flag)
                {
                    anim.start();
                    flag=false;
                }else{
                    anim.stop();
                    flag=true;
                }


            }
        });
    }
}

二.补间动画 1.透明度alpha.xml

2.旋转rotate.xml

3.缩放scale

4.平移translate

5.MainActivity.java设置监听

package com.example.myapplication;

import androidx.appcompat.app.alertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.app.NotificationCompat;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.StaggeredGridLayoutManager;

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.AnimationDrawable;
import android.media.audiofx.DynamicsProcessing;
import android.nfc.Tag;
import android.os.Build;
import android.os.Bundle;
import android.provider.FontsContract;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupMenu;
import android.widget.PopupWindow;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;


import java.util.ArrayList;
import java.util.List;

import javax.security.auth.login.LoginException;

public class MainActivity extends AppCompatActivity {
    private boolean flag=true;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);//R文件自动生成，不可修改，创建的资源都会在R文件中生成一个索引

        final ImageView imageView = findViewById(R.id.iv);
        imageView.setonClickListener(new View.onClickListener() {
            @Override
            public void onClick(View view) {
                //通过加载.xml动画这只文件来创建一个Animation对象
                //Animation animation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.alpha);//透明度
                //Animation animation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.rotate);//旋转
                //Animation animation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.scale);//缩放
                Animation animation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.translate);//平移
                imageView.startAnimation(animation);
            }
        });
    }
}

6.activity_main.xml插入图片

三.属性动画 1.valueAnimator

通过动画改变值

package com.example.myapplication;

import androidx.appcompat.app.alertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.app.NotificationCompat;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.StaggeredGridLayoutManager;

import android.animation.ValueAnimator;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.AnimationDrawable;
import android.media.audiofx.DynamicsProcessing;
import android.nfc.Tag;
import android.os.Build;
import android.os.Bundle;
import android.provider.FontsContract;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupMenu;
import android.widget.PopupWindow;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;


import java.util.ArrayList;
import java.util.List;

import javax.security.auth.login.LoginException;

public class MainActivity extends AppCompatActivity {
    private boolean flag=true;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);//R文件自动生成，不可修改，创建的资源都会在R文件中生成一个索引

        ValueAnimator valueAnimator = ValueAnimator.ofFloat(0f,1f);
        //值从0到1变化
        valueAnimator.setDuration(2000);
        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                float value = (float)animation.getAnimatedValue();
                Log.e("la", "onAnimationUpdate: "+value );

            }
        });
        valueAnimator.start();
    }
}

2.ObjectAnimator

设置透明很漂亮，适合做启动动画

package com.example.myapplication;

import androidx.appcompat.app.alertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.core.app.NotificationCompat;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.StaggeredGridLayoutManager;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.AnimationDrawable;
import android.media.audiofx.DynamicsProcessing;
import android.nfc.Tag;
import android.os.Build;
import android.os.Bundle;
import android.provider.FontsContract;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.PopupMenu;
import android.widget.PopupWindow;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;


import java.util.ArrayList;
import java.util.List;

import javax.security.auth.login.LoginException;

public class MainActivity extends AppCompatActivity {
    private boolean flag=true;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);//R文件自动生成，不可修改，创建的资源都会在R文件中生成一个索引

        ValueAnimator valueAnimator = ValueAnimator.ofFloat(0f,1f);
        valueAnimator.setDuration(2000);
        valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                float value = (float)animation.getAnimatedValue();
                Log.e("la", "onAnimationUpdate: "+value );

            }
        });
        valueAnimator.start();
        TextView textView = findViewById(R.id.tv);
        ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(textView,"alpha",0f,1f);
        //透明度从0到1
        objectAnimator.setDuration(4000);
        objectAnimator.start();
        
        objectAnimator.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animator) {//动画开始时调用
                
            }

            @Override
            public void onAnimationEnd(Animator animator) {//动画结束时调用

            }

            @Override
            public void onAnimationCancel(Animator animator) {//动画取消时调用

            }

            @Override
            public void onAnimationRepeat(Animator animator) {//动画重复执行时调用

            }
        });
        objectAnimator.addListener(new AnimatorListenerAdapter() {
            
            //如果只需要监听动画开始，可以不像上面一样把四个都写出来，可以这样直接重写start
            @Override
            public void onAnimationStart(Animator animation) {
                super.onAnimationStart(animation);
            }
        });
    }
}

Android Studio学习（十三）-动画

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