運(yùn)行效果圖?
主界面(初始),注冊(cè)界面,登錄界面,主界面(注冊(cè)和登錄之后)
實(shí)現(xiàn)步驟
1.設(shè)計(jì)主界面,編寫activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical">
<ImageView
android:layout_width="150dp"
android:layout_height="150dp"
android:id="@+id/image_head"
android:layout_gravity="center"
android:layout_marginTop="130dp"
android:src="@mipmap/head" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/user_name"
android:text="@string/Point_login"
android:layout_marginTop="40dp"
android:gravity="center"
android:textSize="28sp"
android:textStyle="bold"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/user_id"
android:text="@string/User_id"
android:layout_marginTop="15dp"
android:gravity="center"
android:textSize="19sp"/>
<RadioGroup
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/rg1"
android:orientation="horizontal"
android:gravity="center"
android:layout_marginTop="30dp">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btn_login"
android:text="@string/Login"
android:textSize="22sp"
android:ems="5"
android:layout_marginStart="60dp"
android:background="@drawable/btn_shape"
android:textColor="@color/white"
style=""/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btn_logon"
android:text="@string/Logon"
android:textSize="22sp"
android:ems="5"
android:layout_marginStart="40dp"
android:background="@drawable/btn_shape"
android:textColor="@color/white"/>
</RadioGroup>
</LinearLayout>
注:(1) 按鈕的格式是自己設(shè)計(jì)的,如下
注:(2)需編寫strings.xml
2.創(chuàng)建兩個(gè)activity(會(huì)自動(dòng)創(chuàng)建對(duì)應(yīng)的layout布局文件)
?
3.設(shè)計(jì)登錄和注冊(cè)界面,編寫activity_login.xml和activity_logon.xml
activity_login.xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".Login"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/image_back"
android:src="@mipmap/back"
android:layout_marginTop="100dp"
android:layout_marginStart="20dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/Login"
android:textSize="30sp"
android:layout_marginTop="30dp"
android:layout_marginStart="30dp"/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/edit_user"
android:hint="@string/Edit_user"
android:ems="16"
android:inputType="textPersonName"
android:layout_marginTop="25dp"
android:layout_marginStart="30dp"
android:drawableStart="@mipmap/user"
android:drawablePadding="20dp"/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/edit_password"
android:hint="@string/Edit_password"
android:ems="16"
android:inputType="textPassword"
android:layout_marginTop="18dp"
android:layout_marginStart="30dp"
android:drawableStart="@mipmap/password"
android:drawablePadding="20dp"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btn_login2"
android:text="@string/Login"
android:textSize="23sp"
android:layout_marginTop="30dp"
android:layout_gravity="center"
android:ems="12"
android:background="#02E674"
android:textColor="@color/white"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/txtResult"
android:textSize="30sp"
android:textColor="@android:color/holo_red_light"
android:layout_marginTop="40dp"
/>
</LinearLayout>
activity_logon.xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".Logon"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/image_back"
android:src="@mipmap/back"
android:layout_marginTop="60dp"
android:layout_marginStart="20dp"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/Logon"
android:textSize="30sp"
android:layout_marginTop="30dp"
android:layout_marginStart="30dp"/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/edit_name"
android:hint="@string/Edit_name"
android:ems="17"
android:inputType="textPersonName"
android:layout_marginTop="22dp"
android:layout_marginStart="30dp"
android:drawableStart="@mipmap/name"
android:drawablePadding="35dp"/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/edit_user"
android:hint="@string/Edit_user"
android:ems="17"
android:inputType="textPersonName"
android:layout_marginTop="18dp"
android:layout_marginStart="30dp"
android:drawableStart="@mipmap/user"
android:drawablePadding="35dp"/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/edit_password"
android:hint="@string/Edit_password"
android:ems="17"
android:inputType="textPassword"
android:layout_marginTop="18dp"
android:layout_marginStart="30dp"
android:drawableStart="@mipmap/password"
android:drawablePadding="35dp"/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/edit_apassword"
android:hint="@string/Edit_apassword"
android:ems="17"
android:inputType="textPassword"
android:layout_marginTop="18dp"
android:layout_marginStart="30dp"
android:drawableStart="@mipmap/apassword"
android:drawablePadding="35dp"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btn_logon2"
android:text="@string/Logon"
android:textSize="23sp"
android:layout_marginTop="30dp"
android:layout_gravity="center"
android:ems="12"
android:background="#02E674"
android:textColor="@color/white"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/txtResult"
android:textSize="30sp"
android:textColor="@android:color/holo_red_light"
android:layout_marginTop="40dp"
/>
</LinearLayout>
4.?編寫三個(gè) .java 文件(MainActivity,Login,Logon)
MainActivity.java
package com.example.work4_activity_login_logon;
import androidx.activity.result.ActivityResult;
import androidx.activity.result.ActivityResultCallback;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.appcompat.app.AppCompatActivity;
import android.app.Activity;
import android.content.Intent;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
//創(chuàng)建變量,用于接收注冊(cè)的 賬號(hào)id,昵稱,密碼
public static String data_id, data_name, data_password;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
///主界面
//顯示用戶的ID和昵稱
TextView text_id = (TextView) findViewById(R.id.user_id);
TextView text_name = (TextView) findViewById(R.id.user_name);
//頭像是否亮
ImageView image_head = (ImageView) findViewById(R.id.image_head) ;
ColorMatrix cm = new ColorMatrix();
cm.setSaturation(0); // 設(shè)置飽和度
ColorMatrixColorFilter grayColorFilter = new ColorMatrixColorFilter(cm);
image_head.setColorFilter(grayColorFilter); // 如果想恢復(fù)彩色顯示,設(shè)置為null即可
///注冊(cè)功能
//接收注冊(cè)返回的數(shù)據(jù)
ActivityResultLauncher<Intent> launcher_logon = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result_logon) {
if(result_logon.getResultCode() == Activity.RESULT_OK){
//回調(diào)過(guò)來(lái)的intent數(shù)據(jù)
Intent data = result_logon.getData();
//回調(diào)過(guò)來(lái)的結(jié)果代碼
int resultCode = result_logon.getResultCode();
if (resultCode == RESULT_OK){
assert data != null;
//接受并保持注冊(cè)的信息
data_id = data.getStringExtra("data_id_logon");
data_name = data.getStringExtra("data_name_logon");
data_password = data.getStringExtra("data_password_logon");
}
}
}
});
//點(diǎn)擊注冊(cè)按鈕,跳轉(zhuǎn)到注冊(cè)界面
Button btn_logon = (Button) findViewById(R.id.btn_logon);
btn_logon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//跳轉(zhuǎn)注冊(cè)頁(yè)面
Intent intent = new Intent(MainActivity.this, Logon.class);
launcher_logon.launch(intent);
}
});
///登錄功能
//接收登錄返回的數(shù)據(jù)
ActivityResultLauncher<Intent> launcher_login = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result_login) {
if(result_login.getResultCode() == Activity.RESULT_OK){
//回調(diào)過(guò)來(lái)的intent數(shù)據(jù)
Intent data = result_login.getData();
//回調(diào)過(guò)來(lái)的結(jié)果代碼
int resultCode = result_login.getResultCode();
if (resultCode == RESULT_OK){
text_id.setText(data.getStringExtra("data_id")); //顯示賬號(hào)id
text_name.setText(data.getStringExtra("data_name")); //顯示昵稱
image_head.setColorFilter(null); // 設(shè)置為null,恢復(fù)彩色顯示
}
}
}
});
//點(diǎn)擊登錄按鈕,跳轉(zhuǎn)登錄界面
Button btn_login = (Button) findViewById(R.id.btn_login);
btn_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, Login.class);
//發(fā)送需要驗(yàn)證的數(shù)據(jù)(即注冊(cè)的信息)
intent.putExtra("data_id",data_id);
intent.putExtra("data_name",data_name);
intent.putExtra("data_password",data_password);
launcher_login.launch(intent);
}
});
}
}
Login.java文章來(lái)源:http://www.zghlxwxcb.cn/news/detail-743107.html
package com.example.work4_activity_login_logon;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
public class Login extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
///點(diǎn)擊返回鍵時(shí),返回主界面
ImageView image_back = (ImageView) findViewById(R.id.image_back);
image_back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
}
});
//創(chuàng)建變量(用戶名,密碼,提示結(jié)果)
EditText txtID = (EditText) findViewById(R.id.edit_user);
EditText txtPassword = (EditText) findViewById(R.id.edit_password);
TextView txtResult = (TextView) findViewById(R.id.txtResult);
///登錄按鈕
Button btn_login = (Button) findViewById(R.id.btn_login2);
btn_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//判斷是否有記錄,有則登錄成功,無(wú)則提示為注冊(cè)
//獲取記錄中的賬號(hào),昵稱,密碼(及注冊(cè)成功的)
Intent intent_val = getIntent();
String data_id_login = intent_val.getStringExtra("data_id");
String data_name_login = intent_val.getStringExtra("data_name");
String data_password_login = intent_val.getStringExtra("data_password");
//判斷輸入是否合法
if (txtID.getText().toString().isEmpty()) {
txtResult.setText("請(qǐng)輸入賬號(hào)");
} else {
if (txtPassword.getText().toString().isEmpty()) {
txtResult.setText("請(qǐng)輸入密碼");
} else {
if (txtID.getText().toString().equals(data_id_login)){
if(txtPassword.getText().toString().equals(data_password_login)){
//登錄成功
txtResult.setText("登錄成功");
//返回?cái)?shù)據(jù),使主界面圖標(biāo)亮及顯示昵稱和ID
Intent intent = new Intent();
intent.putExtra("data_id",data_id_login);
intent.putExtra("data_name",data_name_login);
setResult(RESULT_OK,intent);
//結(jié)束intent,返回是一個(gè)activity
finish();
}else {
//密碼錯(cuò)誤
txtResult.setText("密碼有誤");
}
}else {
//用戶名不存在
txtResult.setText("用戶名不存在");
}
}
}
}
});
}
}
Logon.java文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-743107.html
package com.example.work4_activity_login_logon;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.Map;
public class Logon extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_logon);
//根據(jù)布局文件上的控件創(chuàng)建相應(yīng)的變量(昵稱,賬號(hào),密碼,確認(rèn)密碼)
EditText editName = (EditText) findViewById(R.id.edit_name);
EditText editId = (EditText) findViewById(R.id.edit_user);
EditText editPassword = (EditText) findViewById(R.id.edit_password);
EditText editApassword = (EditText) findViewById(R.id.edit_apassword);
TextView txtResult = (TextView) findViewById(R.id.txtResult);
///返回主界面
ImageView image_back = (ImageView) findViewById(R.id.image_back);
image_back.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
finish();
}
});
///注冊(cè)
Button btn_logon2 = (Button) findViewById(R.id.btn_logon2);
btn_logon2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//創(chuàng)建變量,保存輸入的注冊(cè)信息(昵稱,賬號(hào),密碼,確認(rèn)密碼)
String data_name_logon = editName.getText().toString();
String data_id_logon = editId.getText().toString();
String data_password_logon = editPassword.getText().toString();
String data_apassword_logon = editApassword.getText().toString();
//判斷輸入是否合法
if (data_name_logon.isEmpty()) {
txtResult.setText("請(qǐng)輸入昵稱");
}else {
if (data_id_logon.isEmpty()) {
txtResult.setText("請(qǐng)輸入賬號(hào)");
} else {
if (data_password_logon.isEmpty()) {
txtResult.setText("請(qǐng)輸入密碼");
}
else {
if (data_apassword_logon.equals(data_password_logon)) {
//注冊(cè)成功
txtResult.setText("注冊(cè)成功,返回主界面");
//并將數(shù)據(jù)返回主界面,使圖標(biāo)亮、昵稱和ID顯示
//返回?cái)?shù)據(jù),是主界面圖標(biāo)亮及顯示昵稱和ID
Intent intent = new Intent();
intent.putExtra("data_id_logon",data_id_logon);
intent.putExtra("data_name_logon",data_name_logon);
intent.putExtra("data_password_logon",data_password_logon);
setResult(RESULT_OK,intent);
finish();
} else {
txtResult.setText("兩次輸入的密碼不一致,請(qǐng)重新輸入");
}
}
}
}
}
});
}
}
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