我正在尝试使应用程序显示包含在项目的可绘制文件中的 5 张图片,我需要当用户第一次点击“下一步”按钮时显示第一张图片,当他点击第二次显示第二张图片时,依此类推. 但是当他点击“后退”按钮时,上一张图片会显示出来,例如用户点击 4 次“下一张”按钮,然后当他点击“后退”按钮时,它会显示第三张图片,依此类推。
JAVA代码:
package com.example.tables;
import android.app.ActionBar;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;
public class MainActivity extends Activity implements ViewFactory{
ImageSwitcher imgS;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imgS=(ImageSwitcher)findViewById(R.id.imageSwitcher1);
imgS.setFactory(this);
Animation inShow=AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left);
imgS.setInAnimation(inShow);
Animation outShow=AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right);
imgS.setOutAnimation(outShow);
}
@Override
public View makeView() {
ImageView tableImage=new ImageView(getApplicationContext());
tableImage.setScaleType(ImageView.ScaleType.FIT_CENTER);///mal2 alcenter
tableImage.setLayoutParams(new ImageSwitcher.LayoutParams(ActionBar.LayoutParams.WRAP_CONTENT , ActionBar.LayoutParams.WRAP_CONTENT));
return tableImage;
}
public void buttonNext(View view){
imgS.setImageResource(R.drawable.i);
}
public void buttonBack(View view){
imgS.setImageResource(R.drawable.ii);
}
}
XML 代码:
<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"
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.example.tables.MainActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RadioButton
android:id="@+id/radioButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Reserve table" />
<TextView
android:id="@+id/selectTableViewText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:textColor="#f00"
android:layout_marginLeft="30dp"
android:text="Please check the button up to Reserve the table">
</TextView>
<ImageSwitcher
android:id="@+id/imageSwitcher1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1" >
</ImageSwitcher>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Next"
android:onClick="buttonNext"
android:layout_weight="1"/>
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Back"
android:onClick="buttonBack"
android:layout_weight="1"/>
</LinearLayout>
</LinearLayout>
</RelativeLayout>