Android随机数

java文件

package com.example.my_xm_bw_luowei;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

private Button bt1;

private EditText et1;

private EditText et2;

private TextView tv;

private int i=0;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

bt1 = (Button) findViewById(R.id.bt1);

et2 = (EditText) findViewById(R.id.et2);

tv = (TextView) findViewById(R.id.tv);

bt1.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

i++;

String trim2 = et2.getText().toString().trim();

String s = "";

Random ran =new Random(System.currentTimeMillis());

Log.d("aaa", "onClick: "+i);

for (int i = 0 ; i <1; i++) {

s = s + "\n" + ran.nextInt(Integer.parseInt(trim2));

}

tv.setText(s+"");

if (i==10){

tv.setText("直接让高金玉上 嘻嘻嘻");

}

}

});

}

}

xml文件

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"

android:orientation="vertical"

>

android:text="高金玉"

android:id="@+id/bt1"

android:background="#ffffff"

android:layout_width="wrap_content"

android:layout_height="wrap_content">

android:id="@+id/et2"

android:hint="0-n"

android:layout_width="match_parent"

android:layout_height="wrap_content">

android:textColor="#DD0D0D"

android:textSize="50dp"

android:id="@+id/tv"

android:text="0"

android:layout_width="wrap_content"

android:layout_height="wrap_content">

效果图片

标签：et2,tv,EditText,private,随机数,import,Android,android

来源： https://blog.csdn.net/mynameisluowei/article/details/115023911