Android 活动与活动间数据传递--登录注册页面

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"package="com.example.myapplication1"><applicationandroid:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:roundIcon="@mipmap/ic_launcher_round"android:supportsRtl="true"android:theme="@style/AppTheme"tools:ignore="GoogleAppIndexingWarning"><activity android:name=".SplashActivity"><intent-filter ><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activity android:name=".MainActivity"><intent-filter><action android:name="android.intent.action.MAIN" /></intent-filter></activity><activity android:name=".SubActivity1"><intent-filter><action android:name="android.intent.action.MAIN" /></intent-filter></activity><activity android:name=".SubActivity2"><intent-filter ><action android:name="android.intent.action.MAIN" /></intent-filter></activity></application></manifest>

MainActivity.java:

package com.example.myapplication1;import android.content.Intent;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;import androidx.appcompat.app.AppCompatActivity;public class MainActivity extends AppCompatActivity {private Button button1,button2;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button1=(Button)findViewById(R.id.button1);//映射activity_main.xml中的id=button1按钮button2=(Button)findViewById(R.id.button2);//映射activity_main.xml中的id=button2按钮final String user = "Admin";final String pass = "I love Android" ;//为两个按钮增加点击事件监听button1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {String username = "";EditText editText1 = (EditText)findViewById(R.id.editText);username = editText1.getText().toString();String password = "";EditText editText2 = (EditText)findViewById(R.id.editText2);password = editText2.getText().toString();if(username.equals(user) && password.equals(pass)){String msg = "欢迎进入DIY！";Toast toast = Toast.makeText(MainActivity.this,msg,Toast.LENGTH_SHORT);toast.setGravity(Gravity.CENTER,0,0);toast.show();Intent intent = new Intent(MainActivity.this,SubActivity1.class);startActivity(intent);}else{String msg = "Wrong username or password.Please try again!";Toast toast = Toast.makeText(MainActivity.this,msg,Toast.LENGTH_SHORT);toast.setGravity(Gravity.CENTER,0,0);toast.show();}}});button2.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent intent=new Intent(MainActivity.this,SubActivity2.class);startActivity(intent);}});}}

SplashActivity.java:

package com.example.myapplication1;import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.Window;
import android.view.WindowManager;import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;public class SplashActivity extends AppCompatActivity {@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.activity_splash);//加上这句设置为全屏不加只隐藏titlegetWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);new Handler().postDelayed(new Runnable() {@Overridepublic void run() {Intent mainIntent = new Intent(SplashActivity.this,MainActivity.class);startActivity(mainIntent);//动画效果overridePendingTransition(R.anim.abc_slide_in_bottom, R.anim.abc_slide_out_bottom);finish();}},3000);}
}

SubActivity1.java:

package com.example.myapplication1;import android.app.Activity;
import android.os.Bundle;import androidx.annotation.Nullable;public class SubActivity1 extends Activity {@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_sub1);/* Button button1;button1=(Button)findViewById(R.id.button1);button1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {String msg = "欢迎进入DIY！";Toast toast = Toast.makeText(SubActivity1.this,msg,Toast.LENGTH_SHORT);toast.setGravity(Gravity.CENTER,0,0);toast.show();}});*/}
}

SubActivity2.java:

package com.example.myapplication1;import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;import androidx.annotation.Nullable;public class SubActivity2 extends Activity {private Button button3;protected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_sub2);button3=(Button)findViewById(R.id.button3);final EditText usernameET,passwordET;usernameET =(EditText)findViewById(R.id.editText5);passwordET = (EditText)findViewById(R.id.editText6);button3.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {String msg = "您输入的用户名是"+usernameET.getText()+"\n"+"密码是"+passwordET.getText();Toast toast = Toast.makeText(SubActivity2.this,msg,Toast.LENGTH_SHORT);toast.setGravity(Gravity.CENTER,0,0);toast.show();}});}
}

Activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns: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"android:orientation="vertical"android:gravity="center_horizontal|center_vertical"tools:context=".MainActivity"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="WELCOME"android:gravity="center"android:textSize="24sp"android:textStyle="bold"/><EditTextandroid:id="@+id/editText"android:layout_width="match_parent"android:layout_height="wrap_content"android:hint="请输入用户名" /><EditTextandroid:id="@+id/editText2"android:layout_width="match_parent"android:layout_height="wrap_content"android:hint="请输入密码"android:inputType="textPassword"/><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"><Buttonandroid:id="@+id/button1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="login"android:layout_weight="1"android:textSize="16sp"/><Buttonandroid:id="@+id/button2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="register"android:layout_weight="1"android:textSize="16sp"/></LinearLayout></LinearLayout>

Activity_splash.xml:

<?xml version="1.0" encoding="utf-8"?>
<!--suppress ALL -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical" android:layout_width="match_parent"android:layout_height="match_parent"><ImageViewandroid:id="@+id/imageView"android:layout_width="match_parent"android:layout_height="match_parent"android:src="@drawable/view"android:scaleType="fitXY"/></LinearLayout>

Activity_sub1.xml:

<?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:weightSum="1"><TextViewandroid:id="@+id/textView3"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_marginTop="200dp"android:layout_weight="1"android:text="欢迎进入DIY！"android:textAlignment="center"android:textSize="24sp"android:textColor="@color/colorAccent"/></LinearLayout>

Activity_sub2.xml:

<?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:gravity="center_horizontal|center_vertical"><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="vertical"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="WELCOME"android:layout_gravity="center"android:textSize="24sp"android:textStyle="bold"/><EditTextandroid:id="@+id/editText5"android:layout_width="match_parent"android:layout_height="wrap_content"android:hint="请输入用户名" /><EditTextandroid:id="@+id/editText6"android:layout_width="match_parent"android:layout_height="wrap_content"android:hint="请输入密码"android:inputType="textPassword"/><EditTextandroid:id="@+id/editText7"android:layout_width="match_parent"android:layout_height="wrap_content"android:hint="请确认密码"android:inputType="textPassword"/><Buttonandroid:id="@+id/button3"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="submit"android:layout_gravity="center"/></LinearLayout>
</LinearLayout>