一、简单的几幅图片自动切换实例
xml布局文件-ViewFlipper布局
<?xml version="1.0" encoding="utf-8"?>
<ViewFlipper xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ViewFlipper"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="@+id/view1"
layout="@layout/view1"
/>
<include
android:id="@+id/view2"
layout="@layout/view2"
/>
<include
android:id="@+id/view3"
layout="@layout/view3"
/>
<include
android:id="@+id/view4"
layout="@layout/view4"
/>
</ViewFlipper>
各个画面的布局
View1:其中@drawable/video_greenhouse_1为自己准备的图片
一共View1~View4四个界面,不重复展示代码。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_greenhouse_1">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="view1"
android:textSize="30sp"
android:layout_gravity="center"/>
</LinearLayout>
java:ViewFlipper的使用
public class ViewFlipperActivity extends AppCompatActivity {
ViewFlipper viewFlipper = null; //ViewFlipper控件
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_flipper);
viewFlipper = (ViewFlipper) findViewById(R.id.ViewFlipper);//获取自动切换
viewFlipper.setAutoStart(true); //设置自动开始
viewFlipper.setFlipInterval(1000); //切换间隔为1s
}
}
二、左右滑屏切换画面实例
步骤
1-注释掉Activity中自动切换的代码
viewFlipper.setAutoStart(true); //设置自动开始
viewFlipper.setFlipInterval(1000); //切换间隔为1s
2-实现OnTouchListenner用于监听触屏
3-设置监听器
java代码
public class ViewFlipperActivity extends AppCompatActivity implements View.OnTouchListener{
ViewFlipper viewFlipper = null; //ViewFlipper控件
private float touchDownX;//手指按下的X坐标
private float touchUpX;//手指松开的X坐标
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_flipper);
viewFlipper = (ViewFlipper) findViewById(R.id.ViewFlipper);//获取自动切换
viewFlipper.setOnTouchListener(this);
// viewFlipper.setAutoStart(true); //设置自动开始
// viewFlipper.setFlipInterval(1000); //切换间隔为1s
}
@Override
public boolean onTouch(View v, MotionEvent event) { //触屏
if(event.getAction() == MotionEvent.ACTION_DOWN) {
//要取得左右滑动时手指“按下”的X坐标
touchDownX = event.getX(); //
return true;
}else if(event.getAction() == MotionEvent.ACTION_UP){
//要取得左右滑动时手指“松开”的X坐标
touchUpX = event.getX(); //
if(touchUpX - touchDownX > 100)//从左向右
{
viewFlipper.showPrevious(); //从左向右,显示上一幅图片
}else if(touchDownX - touchUpX > 100)
{
viewFlipper.showNext(); //从左向右,显示下一幅图片
}
return true;
}
return false;
}
}
切换的动画效果
1-创建动画目录
在res
下面创建目录anim
2-创建动画xml
在anim
中创建四种动画
push_left_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:duration="500"
android:fromXDelta="100.0%p"
android:toXDelta="0.0"/>
<alpha android:duration="500"
android:fromAlpha="0.1"
android:toAlpha="1.0"/>
</set>
push_left_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:duration="500"
android:fromXDelta="0.0"
android:toXDelta="-100.0%p"/>
<alpha android:duration="500"
android:fromAlpha="1.0"
android:toAlpha="0.1"/>
</set>
push_right_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:duration="500"
android:fromXDelta="-100.0%p"
android:toXDelta="0.0"/>
<alpha android:duration="500"
android:fromAlpha="0.1"
android:toAlpha="1.0"/>
</set>
push_right_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:duration="500"
android:fromXDelta="0.0"
android:toXDelta="100.0%p"/>
<alpha android:duration="500"
android:fromAlpha="1.0"
android:toAlpha="0.1"/>
</set>
3-设置动画效果
if(touchUpX - touchDownX > 100)//从左向右
{
//设置切换动画
viewFlipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_in));
viewFlipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_out));
//显示上一个View
viewFlipper.showPrevious(); //从左向右,显示上一幅图片
}else if(touchDownX - touchUpX > 100){
//设置切换动画
viewFlipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in));
viewFlipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out));
viewFlipper.showNext(); //从左向右,显示下一幅图片
}