1完成效果
2布局代码
<?xml version="1.0" encoding="utf-8"?>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="头像"
android:textColor="@android:color/black"
android:textSize="20sp"/>
<ImageView
android:layout_width="80dp"
android:layout_height="80dp"
android:src="@mipmap/ic_launcher"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/activity_vertical_margin">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:gravity="center"
android:text="姓名"
android:textColor="@android:color/black"
android:textSize="20sp"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/et_name"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="@dimen/activity_vertical_margin">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:gravity="center"
android:text="我的性别是"
android:textColor="@android:color/black"
android:textSize="20sp"/>
<RadioGroup
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal"
android:id="@+id/rg">
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/rb_teenager"
android:layout_marginRight="@dimen/activity_vertical_margin"
android:checked="true"
android:text="男"
android:textSize="20sp"/>
<RadioButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/rb_lolita"
android:layout_marginLeft="@dimen/activity_vertical_margin"
android:text="女"
android:textSize="20sp"/>
</RadioGroup>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="我喜欢的专业:"
android:textColor="@android:color/black"
android:textSize="20sp"/>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/chb_java"
android:text="Java"
android:textSize="20sp"/>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/chb_android"
android:text="Android"
android:checked="true"
android:textSize="20sp"/>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/chb_math"
android:text="高数"
android:textSize="20sp"/>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/chb_english"
android:text="英语"
android:textSize="20sp"/>
<Button
android:id="@+id/btn_login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="确定"
android:textSize="22sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
android:layout_marginTop="20sp"
android:orientation="horizontal" >
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="Ip:"
android:textSize="20sp"/>
<EditText
android:id="@+id/et_ip"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="9"
android:inputType="number"/>
</LinearLayout>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tv_showIp"
android:hint="192.168.1.1"
android:paddingLeft="10dp"
android:textSize="20sp" />
</LinearLayout>
3监听事件
package com.example.myapplication;
import android.annotation.SuppressLint;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.inputmethod.InputMethod;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
public class Main2Activity extends AppCompatActivity implements View.OnClickListener {
//1.定义控件变量
private EditText etUsername;
private RadioGroup sexGroup;
private CheckBox chkJava,chkAndroid,chkDatabase,math;
private Button btnConfirm;
private String favitor;
private EditText etIp;
private TextView tvShowIp;
@SuppressLint("WrongViewCast")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
etUsername = findViewById(R.id.et_name);
sexGroup = findViewById(R.id.rg);
chkJava = findViewById(R.id.chb_java);
chkAndroid = findViewById(R.id.chb_android);
chkDatabase = findViewById(R.id.chb_english);
math = findViewById(R.id.chb_math);
btnConfirm = findViewById(R.id.btn_login);
etIp = findViewById(R.id.et_ip);
tvShowIp = findViewById(R.id.tv_showIp);
//3.设置按钮点击事件监听
btnConfirm.setOnClickListener(this);
//获取登录界面传递的数据
Intent intent = getIntent();
if (intent != null){
String name = intent.getStringExtra("username");
etUsername.setText(name);
}
etIp.setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View view, int keyCode, KeyEvent keyEvent) {
switch (keyEvent.getAction()){
case KeyEvent.ACTION_UP:
String ip=etIp.getText().toString();
if (ip.length()<12){
break;}
String newIP="";
for(int i = 0;i<ip.length()/3;i++){
newIP+=ip.substring(i*3,Math.min(i*3+3,ip.length()))+".";
}
newIP = newIP.substring(0,newIP.length()-1);
tvShowIp.setText(newIP);
//关闭键盘
InputMethodManager imm =(InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
if (imm != null && imm.isActive()){
imm.hideSoftInputFromWindow(view.getApplicationWindowToken(),0);
}
}
return false;
}
});
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
float x =event.getX();
float y = event.getY();
String pos = "触点坐标:"+x+","+y;
Toast.makeText(Main2Activity.this,pos,Toast.LENGTH_LONG).show();
}
return super.onTouchEvent(event);
}
@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.btn_login:
getInfo();
break;
}
}
private void getInfo() {
String username = etUsername.getText().toString().trim();
String sex = "男";
int id = sexGroup.getCheckedRadioButtonId();
if (id == R.id.rb_teenager){
sex = "男";
}else {
sex = "女";
}
if (chkJava.isChecked()){
favitor += "java";
}
if (chkAndroid.isChecked()){
favitor += "android";
}
String info = "姓名:"+username+"\n性别:"+sex+"\n喜欢的课程:"+favitor.trim();
Toast.makeText(Main2Activity.this,info, Toast.LENGTH_LONG).show();
Intent intent = new Intent(Main2Activity.this,Main3Activity.class);
intent.putExtra("username",username);
startActivity(intent);
}
}
4 学习总结
1 布局:
布局时注意性别选择行,在两个(男`女)RadioButton外需要包裹一层RadioGroup,这样他们就会构成互斥事件:选择男时女按钮消失,选择女时男按钮消失
2 监听:
1 获取登录界面带来的值
Intent intent = getIntent();
if (intent != null){
String name = intent.getStringExtra(“username”);
etUsername.setText(name);
}
如果获得的值不是空的,我们就在本页面的姓名上显示从登录界面获得的名字.
2 获取地址
1 在显示获得地址前,我们对获得的地址数据进一步处理,仅保留少量小数,然后再显示
2 在实际操作过程中发现操作时底下键盘影响体验,所以我们加入了一个键盘的关闭命令
InputMethodManager imm =(InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
if (imm != null && imm.isActive()){
imm.hideSoftInputFromWindow(view.getApplicationWindowToken(),0);
}