如何以特定的时间间隔为图片添加动画效果？
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在Android的开发过程中，我用的是Coursera类别，以下是我想要实现的静态效果图：
目前，我采用的代码是：
XML:
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<Button
android:id="@+id/startbutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/leftfoot"
android:layout_alignRight="@+id/leftfoot"
android:onClick="startRhythmandAnimation"
android:text="@string/start_button"
/>
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public
class Assignment3MainActivity extends Activity {
private
View mMileTimeGoal;
@Override
protected
void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_assignment3_main);
mMileTimeGoal
= findViewById(R.id.miletimegoal);
}
public
void startRhythmandAnimation () {
String
MileTime = mMileTimeGoal.getContext().toString();
String[]
time_array = MileTime.split(":");
int
hours = Integer.parseInt(time_array[0]);
int
minutes = Integer.parseInt(time_array[1]);
int
seconds = Integer.parseInt(time_array[2]);
int
duration = 3600 * hours + 60 * minutes + seconds;
int
steps_per_second = 3;
int
running_rate = duration * steps_per_second;
View
rightfoot = findViewById(R.id.rightfoot);
View
leftfoot = findViewById(R.id.leftfoot);
rightfoot.setVisibility(View.VISIBLE);
Animation
anim = AnimationUtils.makeInChildBottomAnimation(this);
rightfoot.startAnimation(anim);
leftfoot.setVisibility(View.VISIBLE);
leftfoot.startAnimation(anim);
}
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我觉得，你可以采用如下代码:
Activity
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private
Handler mHandler;
private
long mInterval = 1000;
private
View mLeftfoot;
private
Animation mFootAnim;
public
void onCreate(Bundle bundle) {
...
mHandler
= new
Handler(); //.os
package class when importing
mLeftfoot
= findViewById(R.id.leftfoot);
mFootAnim
= AnimationUtils.loadAnimation(this,
R.anim.foot);
stepRecursive();
}
private
void stepRecursive() {
mHandler.postDelayed(new
Runnable() {
@Override
public
void run() {
mLeftFoot.startAnimation(mFootAnim
);
stepRecursive();
}
},
mInterval);
}
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<?xml
version="1.0"
encoding="utf-8"?>
<translate
android:fromYDelta="0"
android:toYDelta="-15"
android:duration="400"/>
<alpha
android:fromAlpha="1.0"
android:toAlpha="0"
android:duration="400"
/>
</set>
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