【发布时间】：2014-11-01 02:49:28
【问题描述】：
我正在尝试为布局设置动画以隐藏自身（以便稍后通过动画为其他布局设置动画以取代其位置）。必须与 SDK 8 (android 2.2) 兼容。
如果movingLayout的父级（我的xml中的parent_of_moving_layout）是movingLayout高度的两倍，但我希望父级具有相同的高度，因此movingLayout将自身隐藏在下方，以便我可以为另一个movingLayout2设置动画它的位置。
我已经研究了很长时间，但我找不到解决方案，希望有人有想法（尝试了 setFillAfter 和 setFillEnabled）。
这是我的代码和 xml 来重现结果：
activity_my.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MyActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MOVE IT"
android:id="@+id/button"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="50dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:id="@+id/parent_of_moving_layout">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="50dp"
android:background="#ff93c049"
android:id="@+id/movinglayout"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Test Button"
android:id="@+id/testbutton"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
</RelativeLayout>
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="80dp"
android:layout_below="@+id/button"
android:layout_centerHorizontal="true"
android:layout_marginTop="83dp"></FrameLayout>
</RelativeLayout>
MyActivity.java
package coersum.com.testanimation;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.RelativeLayout;
public class MyActivity extends ActionBarActivity {
//Button clicked to make movingLayout move (mButton) and button to make sure the objects moved and not only their displays (testButton)
Button mButton, testButton;
//layout to move and its LayoutParams (relative seems to be the only one that worked on my tests)
RelativeLayout movingLayout;
RelativeLayout.LayoutParams params;
//used to direction of movement for testing
String direction = "down";
//just a counter to see the Log.d changes more clearly
int count = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
mButton = (Button) findViewById(R.id.button);
mButton.setOnClickListener(mButtonClickListener);
testButton = (Button) findViewById(R.id.testbutton);
testButton.setOnClickListener(testButtonClickListener);
movingLayout = (RelativeLayout) findViewById(R.id.movinglayout);
params = (RelativeLayout.LayoutParams) movingLayout.getLayoutParams();
}
private View.OnClickListener mButtonClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
TranslateAnimation animation;
if (direction.equals("down")) {
animation = new TranslateAnimation(0, 0, 0, 50);
} else {
animation = new TranslateAnimation(0, 0, 0, -50);
}
animation.setFillAfter(true);
animation.setFillEnabled(true);
animation.setDuration(500);
animation.setAnimationListener(mAnimationListener);
movingLayout.startAnimation(animation);
}
};
private View.OnClickListener testButtonClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
count++;
Log.d("Status", "Clicked on Test Button "+count+" "+direction);
}
};
private Animation.AnimationListener mAnimationListener = new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
movingLayout.clearAnimation();
if (direction.equals("down")) {
direction = "up";
params.topMargin = params.topMargin + 50;
} else {
direction = "down";
params.topMargin = params.topMargin - 50;
}
movingLayout.setLayoutParams(params);
}
};
}
【问题讨论】：
标签： android animation layout margin padding