图片的自动轮换

快来打我* 2022-06-13 14:06 225阅读 0赞

以下为效果图：

![Image 1][]![Center][]

下面直接上代码：

Java部分代码：

package com.example.project_0617;
    
    import android.database.Cursor;
    import android.database.sqlite.SQLiteDatabase;
    import android.database.sqlite.SQLiteOpenHelper;
    import android.media.Image;
    import android.os.Bundle;
    import android.os.Handler;
    import android.os.Message;
    import android.support.annotation.Nullable;
    import android.support.v4.view.PagerAdapter;
    import android.support.v4.view.ViewPager;
    import android.support.v7.app.AppCompatActivity;
    import android.util.Log;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ImageView;
    import android.widget.RadioButton;
    import android.widget.RadioGroup;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import com.example.zking.db.DbHelper;
    import com.example.zking.db.DbManager;
    import com.example.zking.entity.xuebaTK;
    
    import java.util.ArrayList;
    import java.util.List;
    import java.util.concurrent.Executors;
    import java.util.concurrent.ScheduledExecutorService;
    import java.util.concurrent.TimeUnit;
    
    /**
     * Created by Administrator on 2017/6/21.
     */
    
    public class Message_Activity extends AppCompatActivity {
    
        private int[] id;
        private ArrayList<View> arrayList;
        private ViewPager vp;
        private int oldPosition;
        private int currentItem;
        private ScheduledExecutorService scheduledExecutorService;
        private ArrayList<RadioButton> buttons;
        private RadioGroup rg;
        private int[] radioB;
        private TextView tv1;
        private List<xuebaTK> list=new ArrayList<>();
    
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_massage);
    
            id = new int[]{R.drawable.x1,R.drawable.x2,R.drawable.x3,R.drawable.x4,R.drawable.x5,R.drawable.x6};
            arrayList = new ArrayList<>();
            vp = (ViewPager) findViewById(R.id.vp_mes_pager);
            rg = (RadioGroup) findViewById(R.id.rg_mes_group);
            oldPosition = 0;
            radioB = new int[]{R.id.rb_mes_button1,R.id.rb_mes_button2,R.id.rb_mes_button3,R.id.rb_mes_button4,R.id.rb_mes_button5,R.id.rb_mes_button6};
            buttons = new ArrayList<>();
    
            
            for (int i = 0; i < id.length; i++) {
                ImageView iv=new ImageView(this);
                iv.setImageResource(id[i]);
                arrayList.add(iv);
            }
            buttons.add((RadioButton) findViewById(R.id.rb_mes_button1));
            buttons.add((RadioButton) findViewById(R.id.rb_mes_button2));
            buttons.add((RadioButton) findViewById(R.id.rb_mes_button3));
            buttons.add((RadioButton) findViewById(R.id.rb_mes_button4));
            buttons.add((RadioButton) findViewById(R.id.rb_mes_button5));
            buttons.add((RadioButton) findViewById(R.id.rb_mes_button6));
    
            vp.setAdapter(new AdapterDIY());
            rg.check(radioB[0]);
    
            vp.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
                @Override
                public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    
                }
    
                @Override
                public void onPageSelected(int position) {
                    buttons.get(position).isChecked();
                    oldPosition=position;
                    currentItem=position;
                }
    
                @Override
                public void onPageScrollStateChanged(int state) {
                    if(state==2){
                        rg.check(radioB[vp.getCurrentItem()]);
                    }
                }
            });
        }
    
        class AdapterDIY extends PagerAdapter{
    
            @Override
            public int getCount() {
                return arrayList.size();
            }
    
            @Override
            public boolean isViewFromObject(View view, Object object) {
                return view==object;
            }
    
            @Override
            public void destroyItem(ViewGroup container, int position, Object object) {
                View v=arrayList.get(position);
                container.removeView(v);
            }
    
            @Override
            public Object instantiateItem(ViewGroup container, int position) {
                View v=arrayList.get(position);
                container.addView(v);
                return v;
            }
        }
    
        @Override
        protected void onStart() {
            super.onStart();
            scheduledExecutorService= Executors.newSingleThreadScheduledExecutor();
            scheduledExecutorService.scheduleWithFixedDelay(new ViewPagerTask(),2,2, TimeUnit.SECONDS);
        }
    
        class ViewPagerTask implements Runnable{
    
           @Override
           public void run() {
               currentItem=(currentItem+1)%id.length;
                handler.obtainMessage().sendToTarget();
           }
       }
       Handler handler=new Handler(){
           @Override
           public void handleMessage(Message msg) {
               vp.setCurrentItem(currentItem);
           }
       };
    
    }

Xml部分代码：

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical" android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/b5"
        >
    
       <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:layout_marginTop="10dp"
            android:layout_marginLeft="5dp"
            android:layout_marginRight="5dp"
            >
    
            <android.support.v4.view.ViewPager
                android:layout_width="match_parent"
                android:layout_height="260dp"
                android:id="@+id/vp_mes_pager"
                android:alpha="0.9"
                >
            </android.support.v4.view.ViewPager>
    
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                >
    
                <RadioGroup
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:gravity="center"
                    android:id="@+id/rg_mes_group"
                    >
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/rb_mes_button1"
                        />
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/rb_mes_button2"
                        />
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/rb_mes_button3"
                        />
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/rb_mes_button4"
                        />
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/rb_mes_button5"
                        />
                    <RadioButton
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/rb_mes_button6"
                        />
                </RadioGroup>
    
            </LinearLayout>
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                >
    
                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="70dp"
                    android:text="@string/mes_tv1"
                    android:gravity="center"
                    android:textSize="18dp"
                    android:background="#afb3eaff"
                    android:layout_marginBottom="5dp"
                    android:id="@+id/tv_mes_view1"
                    android:singleLine="true"
                    android:scrollHorizontally="true"
                    android:ellipsize="marquee"
                    android:marqueeRepeatLimit="marquee_forever"
                    />
                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="70dp"
                    android:text="@string/mes_tv2"
                    android:gravity="center"
                    android:textSize="18dp"
                    android:background="#afb3eaff"
                    android:layout_marginBottom="5dp"
                    android:id="@+id/tv_mes_view2"
                    android:singleLine="true"
                    android:scrollHorizontally="true"
                    android:ellipsize="marquee"
                    android:marqueeRepeatLimit="marquee_forever"
                    />
                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="70dp"
                    android:text="@string/mes_tv3"
                    android:gravity="center"
                    android:textSize="18dp"
                    android:background="#afb3eaff"
                    android:layout_marginBottom="5dp"
                    android:id="@+id/tv_mes_view3"
                    android:singleLine="true"
                    android:scrollHorizontally="true"
                    android:ellipsize="marquee"
                    android:marqueeRepeatLimit="marquee_forever"
                    />
                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="70dp"
                    android:text="@string/mes_tv4"
                    android:gravity="center"
                    android:textSize="18dp"
                    android:background="#afb3eaff"
                    android:layout_marginBottom="5dp"
                    android:id="@+id/tv_mes_view4"
                    android:singleLine="true"
                    android:scrollHorizontally="true"
                    android:ellipsize="marquee"
                    android:marqueeRepeatLimit="marquee_forever"
                    />
    
               
            </LinearLayout>
    
    
       </LinearLayout>
    
    
    </LinearLayout>

[Image 1]: 
[Center]: /images/20220613/7d4d8ec3cc524a56a972dbbd4295c46f.png