android页面1

我就是我 2022-01-23 13:13 192阅读 0赞

package s1.ppp.com;
    
    
    import android.content.Intent;
    import android.os.Bundle;
    import android.support.v7.app.AppCompatActivity;
    import android.util.Log;
    import android.view.View;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.widget.TextView;
    
    import java.util.HashSet;
    import java.util.Random;
    
    public class MainActivity extends AppCompatActivity {
    
        //一共3步
        //1--声明按钮变量
        private Button btn01 = null;
        private Button btn_open_M2 = null;
        private TextView tv01= null;
    
        private ImageView imageView= null;
        private int[] res_image = {R.mipmap.zhifubao01, R.mipmap.weixin01};
        private int index = 0;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            //2--用findViewById方法找到按钮的id
            //关联控件
            btn01 = (Button) findViewById(R.id.btn01);
            btn_open_M2 = (Button)findViewById(R.id.btn_open_M2);
    
            tv01 = (TextView) findViewById(R.id.tv01);
            imageView = (ImageView) findViewById(R.id.imageView);
    
    
            //3--设置监听器,重写监听回调方法
            btn01.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    //计算7个号码
                    String str = cal_Num1();
                    tv01.setText(str);
                    Log.d("tagsss","双色球算号按钮");
                }
            });
    
        }
    
    
        /**
         * 更换图片
         * @param v
         */
        public void changeImage(View v) {
    
            index++;
            if (index > res_image.length - 1) {
                index = 0;
            }
            imageView.setImageResource(res_image[index]);
    
        }
    
        /**
         * 双色球随机生成数字
         * 前6位，1--33个数字
         * 第7位，1-16个数字
         *
         * @return
         */
        public static String cal_Num1() {
            StringBuilder strBuf = new StringBuilder();
            HashSet<Integer> hashSet = new HashSet<>();
            Random r = new Random();
    
            // 生成1--33的数字，6组
            int i = 0;
            while (true) {
                i = r.nextInt(33) + 1;
                hashSet.add(i);
    
                if (hashSet.size() == 6) {
                    break;
                }
            }
    
            for (Integer k : hashSet) {
                strBuf.append(k + "  ");
            }
    
            Random r2 = new Random();
            int lan1 = r2.nextInt(16) + 1;
    
            strBuf.append(lan1);
    
            return strBuf.toString();
        }
    
    
        /**
         * 跳转到M2Activity页面
         * @param view
         */
        public void nextPageto_M2(View view) {
            Intent intent = new Intent(this,M2Activity.class);
            startActivity(intent);
            Log.d("tagsss","nextPageto_M2下一页按钮");
        }
    }

布局文件

<?xml version="1.0" encoding="utf-8"?>
    <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">
    
        <Button
            android:id="@+id/btn01"
            android:layout_width="200dp"
            android:layout_height="70dp"
            android:layout_marginStart="8dp"
            android:layout_marginBottom="16dp"
            android:text="双色球算号"
            android:textSize="24sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent" />
    
        <TextView
            android:id="@+id/tv01"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="10dp"
            android:layout_marginEnd="10dp"
            android:layout_marginBottom="40dp"
            android:text=""
            android:textAlignment="center"
            android:textSize="28sp"
            android:typeface="normal"
            app:layout_constraintBottom_toTopOf="@+id/btn01"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent" />
    
        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:layout_marginStart="8dp"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="8dp"
            android:onClick="changeImage"
            android:scaleType="fitCenter"
            android:src="@mipmap/zhifubao01"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            tools:srcCompat="@mipmap/zhifubao01" />
    
        <Button
            android:id="@+id/btn_open_M2"
            android:layout_width="wrap_content"
            android:layout_height="70dp"
            android:layout_marginEnd="8dp"
            android:layout_marginBottom="16dp"
            android:onClick="nextPageto_M2"
            android:text="下一页"
            android:textAlignment="center"
            android:textSize="28sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent" />
    
    </android.support.constraint.ConstraintLayout>