我正在开发一个将屏幕从右向左移动的应用程序。我已经实现了屏幕从左向右的移动，但是我在从右向左移动时遇到了问题。
以下是我的代码，它适用于从左到右
ExpandAnimation
/* Created by Edward Akoto on 12/31/12.
* Email akotoe@aua.ac.ke
* Free for modification and distribution
*/
package com.example.hotelmenu;
import android.view.Gravity;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.LinearLayout;
import android.widget.FrameLayout.LayoutParams;
public class ExpandAnimation extends TranslateAnimation implements Animation.AnimationListener{
private LinearLayout slidingLayout;
int panelWidth;
public ExpandAnimation(LinearLayout layout, int width, int fromXType, float fromXValue, int toXType,
float toXValue, int fromYType, float fromYValue, int toYType, float toYValue) {
super(fromXType, fromXValue, toXType, toXValue, fromYType, fromYValue, toYType, toYValue);
//Initialize
slidingLayout = layout;
panelWidth = width;
setDuration(400);
setFillAfter( false );
setInterpolator(new AccelerateDecelerateInterpolator());
setAnimationListener(this);
slidingLayout.startAnimation(this);
}
public void onAnimationEnd(Animation arg0) {
//Create margin and align left
LayoutParams params = (LayoutParams) slidingLayout.getLayoutParams();
params.leftMargin = panelWidth;
params.gravity = Gravity.LEFT;
slidingLayout.clearAnimation();
slidingLayout.setLayoutParams(params);
slidingLayout.requestLayout();
}
public void onAnimationRepeat(Animation arg0) {
}
public void onAnimationStart(Animation arg0) {
}
}
CollapseAnimation
/* Created by Edward Akoto on 12/31/12.
* Email akotoe@aua.ac.ke
* Free for modification and distribution
*/
package com.example.hotelmenu;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.LinearLayout;
import android.widget.FrameLayout.LayoutParams;
public class CollapseAnimation extends TranslateAnimation implements TranslateAnimation.AnimationListener{
private LinearLayout slidingLayout;
int panelWidth;
public CollapseAnimation(LinearLayout layout, int width, int fromXType, float fromXValue, int toXType,
float toXValue, int fromYType, float fromYValue, int toYType, float toYValue) {
super(fromXType, fromXValue, toXType, toXValue, fromYType, fromYValue, toYType, toYValue);
//Initialize
slidingLayout = layout;
panelWidth = width;
setDuration(400);
setFillAfter( false );
setInterpolator(new AccelerateDecelerateInterpolator());
setAnimationListener(this);
//Clear left and right margins
LayoutParams params = (LayoutParams) slidingLayout.getLayoutParams();
params.rightMargin = 0;
params.leftMargin = 0;
slidingLayout.setLayoutParams(params);
slidingLayout.requestLayout();
slidingLayout.startAnimation(this);
}
public void onAnimationEnd(Animation animation) {
}
public void onAnimationRepeat(Animation animation) {
}
public void onAnimationStart(Animation animation) {
}
}
private LinearLayout slidingPanel;
private boolean isExpanded;
private DisplayMetrics metrics;
private LinearLayout menuPanel;
private int panelWidth;
FrameLayout.LayoutParams menuPanelParameters;
FrameLayout.LayoutParams slidingPanelParameters;
LinearLayout.LayoutParams headerPanelParameters ;
LinearLayout.LayoutParams listViewParameters;
FrameLayout mainframe;
metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
panelWidth = 200;//(int) ((metrics.widthPixels)*0.5);
menuPanel = (LinearLayout) findViewById(R.id.menuPanel);
menuPanelParameters = (FrameLayout.LayoutParams) menuPanel.getLayoutParams();
menuPanelParameters.width = panelWidth;
menuPanel.setLayoutParams(menuPanelParameters);
slidingPanel = (LinearLayout) findViewById(R.id.slidingPanel);
slidingPanelParameters = (FrameLayout.LayoutParams) slidingPanel.getLayoutParams();
slidingPanelParameters.width = metrics.widthPixels;
slidingPanel.setLayoutParams(slidingPanelParameters);
mainframe = (FrameLayout) findViewById(R.id.mainframe);
listViewParameters = (LinearLayout.LayoutParams) mainframe.getLayoutParams();
listViewParameters.width = metrics.widthPixels;
mainframe.setLayoutParams(listViewParameters);
if(!isExpanded){
isExpanded = true;
menuPanel.setVisibility(View.VISIBLE);
//Expand
new ExpandAnimation(slidingPanel, panelWidth,
Animation.RELATIVE_TO_SELF, 0.0f,
Animation.RELATIVE_TO_SELF, 0.0f, 0, 0.0f, 0, 0.0f);
}else{
isExpanded = false;
menuPanel.setVisibility(View.GONE);
//Collapse
new CollapseAnimation(slidingPanel,panelWidth,
TranslateAnimation.RELATIVE_TO_SELF, 0.0f,
TranslateAnimation.RELATIVE_TO_SELF, 0.0f, 0, 0.0f, 0, 0.0f);
}