逐帧动画
定义：把几张图片快速播放形成的一个效果
MainActivity
package a.b.c.lele_anim;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.view.View;
import android.widget.RelativeLayout;
import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;
public class MainActivity extends AppCompatActivity{
private boolean flag = true;
@Override
protected void onCreate(Bundle savadInstanceState){
super.onCreate(savedInstance);
setContentView(R.layout.activity_main);
RelativeLayout relativeLaout = findViewById(R.id.rl);
AnimationDrawable anim = (AnimationDrawable) relativeLayoutl.getBackground();
relativeLayout.setOnClickListener(new View.OnClickListener(){
@Override
public void onCLick(View view){
if(flag){
anim.start();
flag = false;
}else{
anim.stop();
flag = true;
}
}
});
}
}
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activity_main
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:layout_height="match_parent"
android:layout_width="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="@drawable/frame"
android:id="@+id/rl"
/>
frame
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/tx" android:duration="120"></item>
<item android:drawable="@drawable/bg" android:duration="120"></item>
</animation-list>
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补间动画
定义：我们设置一个初始值以及结束值，然后设置一个变化时间，安卓会自动给我们补全
创建一个文件夹
new 一个Animation Resource File
MainActivity
package a.b.c.animtweened;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView imageView = findViewById(R.id.iv);
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
透明度
Animation animation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.alpha);
旋转
Animation animation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.rotate);
缩放
Animation animation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.scale);
平移
Animation animation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.translate);
imageView.startAnimation(animation);
}
});
}
}
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alpha.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha
android:fromAlpha="0"
android:toAlpha="1"
android:duration="2000"
/>
</set>
rotate.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<rotate android:fromDegrees="0"
android:toDegrees="360"
android:pivotX="50%"
android:pivotY="50%"
android:duration="2000"
/>
</set>
scale.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:duration="2000"
android:fromXScale="1"
android:fromYScale="1"
android:pivotX="50%"
android:pivotY="50%"
android:toXScale="0.5"
android:toYScale="0.5"
/>
</set>
translate.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="200"
android:fromXDelta="0"
android:fromYDelta="0"
android:toXDelta="400"
android:toYDelta="400"
/>
</set>
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属性动画
MainActivity
package a.b.c.animproperty;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import androidx.activity.EdgeToEdge;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ValueAnimator valueAnimator = ValueAnimator.ofFloat(0f,1f);
valueAnimator.setDuration(2000);
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(@NonNull ValueAnimator valueAnimator) {
float value = (float) valueAnimator.getAnimatedValue();
Log.e("lele", "onAnimationUpdate: " + value );
}
});
valueAnimator.start();
TextView textView = findViewById(R.id.tv);
ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(textView,"alpha",0f,1f);
objectAnimator.setDuration(40000);
objectAnimator.start();
objectAnimator.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(@NonNull Animator animator) {
}
@Override
public void onAnimationEnd(@NonNull Animator animator) {
}
@Override
public void onAnimationCancel(@NonNull Animator animator) {
}
@Override
public void onAnimationRepeat(@NonNull Animator animator) {
}
});
objectAnimator.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
super.onAnimationStart(animation);
}
});
}
}
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<?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:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
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