慕课动画

逐帧动画

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_frame_animation"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.animation.frame.FrameAnimationActivity">

    <View
        android:id="@+id/view"
        android:background="@drawable/loading"
        android:layout_centerInParent="true"
        android:layout_width="300dp"
        android:layout_height="300dp" />

    <LinearLayout
        android:layout_alignParentBottom="true"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <Button
            android:id="@+id/btnStart"
            android:text="Start"
            android:onClick="onClick"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />

        <Button
            android:id="@+id/btnStop"
            android:text="Stop"
            android:onClick="onClick"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content" />
    </LinearLayout>

</RelativeLayout>

loading.xml

<?xml version="1.0" encoding="utf-8"?>
<animation-list android:oneshot="true"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:drawable="@drawable/frame_1"
        android:duration="100" />

    <item
        android:drawable="@drawable/frame_2"
        android:duration="100" />

    <item
        android:drawable="@drawable/frame_3"
        android:duration="100" />
</animation-list>

package com.animation.frame;

import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

import com.animation.R;

public class FrameAnimationActivity extends AppCompatActivity {

    private AnimationDrawable animationDrawable;

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

        View view = findViewById(R.id.view);
        animationDrawable = (AnimationDrawable) view.getBackground();
        animationDrawable.setOneShot(true);
    }

    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.btnStart:
                animationDrawable.start();
                break;
            case R.id.btnStop:
                animationDrawable.stop();
                break;
        }
    }
}

视图动画