如何将数据从一个 xml 发送到另一个 xml 布局？

Question

1.第一个活动： 此Activity有两个EditTexts和两个Buttons。 我需要提供登录 ID 和密码。这里 Buttons 包含登录和取消：

package com.samelayout;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class SameLayoutActivity extends Activity {
    /** Called when the activity is first created. */
    EditText Myusername;
    EditText Mypassword;
    Button btnlogin;
    Button btncancel;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btnlogin=(Button)findViewById(R.id.loginbutton);
        btncancel=(Button)findViewById(R.id.cancelbutton);
        Myusername=(EditText)findViewById(R.id.username);
        Mypassword=(EditText)findViewById(R.id.password);    
        btnlogin.setOnClickListener(new OnClickListener()
        {           public void onClick(View v) {
                String str1=Myusername.getText().toString();
                String str2=Mypassword.getText().toString();
                Intent int1=new Intent(getApplicationContext(),Login.class);
                Bundle b= new Bundle();
                b.putString("userdata", str1);
                b.putString("userdata1", str2);
                int1.putExtras(b);
                int1.putExtras(b);
                //(int1);
                startActivityForResult(int1, 0);
            }
        });
    btncancel.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            // TODO Auto-generated method stub
            finish();
        }
    });  
    }
}

2.second Activity： 此Activity 从第一个Activity 检索数据。我需要

package com.samelayout;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class Login extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
        //Intent int1= getIntent();
        Bundle b=this.getIntent().getExtras();
        if(b!=null)
        {
            String str1=b.getString("userdata");
            String str2=b.getString("userdata1");
            TextView tv1=(TextView)findViewById(R.id.text1);
            TextView tv2=(TextView)findViewById(R.id.text2);
            tv1.setText(str1);
            tv2.setText(str2);
            setContentView(tv1);
            setContentView(tv2); }
    } }

在此处向第二个 xml 文件 3.main.xml 显示用户详细信息：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/Linearlayout"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:weightSum="1"
    android:background="@android:color/darker_gray" >

        <TextView android:layout_width="fill_parent" 
        android:text="Employee ID:" 
        android:layout_height="wrap_content" 
        android:textColor="#0000FF" 
        android:textSize="20sp"/>

        <EditText android:hint="enter ur ID" 
        android:singleLine="true"
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/username"/>

        <TextView android:layout_width="fill_parent" 
        android:text="Password:" 
        android:layout_height="wrap_content" 
        android:textColor="#0000FF" 
        android:textSize="20dip"/>

        <EditText android:singleLine="true" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:id="@+id/password" 
        android:password="true"/>

        <Button 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="Submit" 
        android:id="@+id/loginbutton"/>

        <Button 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="Cancel" 
        android:id="@+id/cancelbutton"/>
      </LinearLayout>

4. 可以在此处显示所需的输出：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/Linearlayout"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:weightSum="1"
    android:background="@android:color/darker_gray" >

    <TextView 
        android:layout_width="fill_parent" 
        android:id="@+id/text1"
        android:text="Employee Name:" 
        android:layout_height="wrap_content" 
        android:textColor="#0000FF" 
        android:textSize="20sp"/>
    <TextView 
        android:layout_width="fill_parent" 
        android:id="@+id/text2"
        android:text="Employee password:" 
        android:layout_height="wrap_content" 
        android:textColor="#0000FF" 
        android:textSize="20sp"/>

    </LinearLayout>

5. 这是我的 Logcat 收到错误

11-22 12:04:27.298: W/KeyCharacterMap(334): No keyboard for id 0
11-22 12:04:27.298: W/KeyCharacterMap(334): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
11-22 12:04:37.738: D/AndroidRuntime(334): Shutting down VM
11-22 12:04:37.738: W/dalvikvm(334): threadid=1: thread exiting with uncaught exception (group=0x40015560)
11-22 12:04:37.758: E/AndroidRuntime(334): FATAL EXCEPTION: main
11-22 12:04:37.758: E/AndroidRuntime(334): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.samelayout/com.samelayout.Login}; have you declared this activity in your AndroidManifest.xml?
11-22 12:04:37.758: E/AndroidRuntime(334):  at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1405)
11-22 12:04:37.758: E/AndroidRuntime(334):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1379)
11-22 12:04:37.758: E/AndroidRuntime(334):  at android.app.Activity.startActivityForResult(Activity.java:2827)
11-22 12:04:37.758: E/AndroidRuntime(334):  at com.samelayout.SameLayoutActivity$1.onClick(SameLayoutActivity.java:41)
11-22 12:04:37.758: E/AndroidRuntime(334):  at android.view.View.performClick(View.java:2485)
11-22 12:04:37.758: E/AndroidRuntime(334):  at android.view.View$PerformClick.run(View.java:9080)
11-22 12:04:37.758: E/AndroidRuntime(334):  at android.os.Handler.handleCallback(Handler.java:587)
11-22 12:04:37.758: E/AndroidRuntime(334):  at android.os.Handler.dispatchMessage(Handler.java:92)
11-22 12:04:37.758: E/AndroidRuntime(334):  at android.os.Looper.loop(Looper.java:123)
11-22 12:04:37.758: E/AndroidRuntime(334):  at android.app.ActivityThread.main(ActivityThread.java:3683)
11-22 12:04:37.758: E/AndroidRuntime(334):  at java.lang.reflect.Method.invokeNative(Native Method)
11-22 12:04:37.758: E/AndroidRuntime(334):  at java.lang.reflect.Method.invoke(Method.java:507)
11-22 12:04:37.758: E/AndroidRuntime(334):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-22 12:04:37.758: E/AndroidRuntime(334):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-22 12:04:37.758: E/AndroidRuntime(334):  at dalvik.system.NativeStart.main(Native Method)
11-22 12:04:42.079: I/Process(334): Sending signal. PID: 334 SIG: 9
11-22 14:46:39.458: W/KeyCharacterMap(377): No keyboard for id 0
11-22 14:46:39.458: W/KeyCharacterMap(377): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
11-22 14:46:42.309: D/AndroidRuntime(377): Shutting down VM
11-22 14:46:42.309: W/dalvikvm(377): threadid=1: thread exiting with uncaught exception (group=0x40015560)
11-22 14:46:42.329: E/AndroidRuntime(377): FATAL EXCEPTION: main
11-22 14:46:42.329: E/AndroidRuntime(377): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.samelayout/com.samelayout.Login}; have you declared this activity in your AndroidManifest.xml?
11-22 14:46:42.329: E/AndroidRuntime(377):  at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1405)
11-22 14:46:42.329: E/AndroidRuntime(377):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1379)
11-22 14:46:42.329: E/AndroidRuntime(377):  at android.app.Activity.startActivityForResult(Activity.java:2827)
11-22 14:46:42.329: E/AndroidRuntime(377):  at com.samelayout.SameLayoutActivity$1.onClick(SameLayoutActivity.java:38)
11-22 14:46:42.329: E/AndroidRuntime(377):  at android.view.View.performClick(View.java:2485)
11-22 14:46:42.329: E/AndroidRuntime(377):  at android.view.View$PerformClick.run(View.java:9080)
11-22 14:46:42.329: E/AndroidRuntime(377):  at android.os.Handler.handleCallback(Handler.java:587)
11-22 14:46:42.329: E/AndroidRuntime(377):  at android.os.Handler.dispatchMessage(Handler.java:92)
11-22 14:46:42.329: E/AndroidRuntime(377):  at android.os.Looper.loop(Looper.java:123)
11-22 14:46:42.329: E/AndroidRuntime(377):  at android.app.ActivityThread.main(ActivityThread.java:3683)
11-22 14:46:42.329: E/AndroidRuntime(377):  at java.lang.reflect.Method.invokeNative(Native Method)
11-22 14:46:42.329: E/AndroidRuntime(377):  at java.lang.reflect.Method.invoke(Method.java:507)
11-22 14:46:42.329: E/AndroidRuntime(377):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-22 14:46:42.329: E/AndroidRuntime(377):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-22 14:46:42.329: E/AndroidRuntime(377):  at dalvik.system.NativeStart.main(Native Method)
11-22 14:48:22.648: D/AndroidRuntime(411): Shutting down VM
11-22 14:48:22.648: W/dalvikvm(411): threadid=1: thread exiting with uncaught exception (group=0x40015560)
11-22 14:48:22.657: E/AndroidRuntime(411): FATAL EXCEPTION: main
11-22 14:48:22.657: E/AndroidRuntime(411): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.samelayout/com.samelayout.Login}; have you declared this activity in your AndroidManifest.xml?
11-22 14:48:22.657: E/AndroidRuntime(411):  at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1405)
11-22 14:48:22.657: E/AndroidRuntime(411):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1379)
11-22 14:48:22.657: E/AndroidRuntime(411):  at android.app.Activity.startActivityForResult(Activity.java:2827)
11-22 14:48:22.657: E/AndroidRuntime(411):  at com.samelayout.SameLayoutActivity$1.onClick(SameLayoutActivity.java:38)
11-22 14:48:22.657: E/AndroidRuntime(411):  at android.view.View.performClick(View.java:2485)
11-22 14:48:22.657: E/AndroidRuntime(411):  at android.view.View$PerformClick.run(View.java:9080)
11-22 14:48:22.657: E/AndroidRuntime(411):  at android.os.Handler.handleCallback(Handler.java:587)
11-22 14:48:22.657: E/AndroidRuntime(411):  at android.os.Handler.dispatchMessage(Handler.java:92)
11-22 14:48:22.657: E/AndroidRuntime(411):  at android.os.Looper.loop(Looper.java:123)
11-22 14:48:22.657: E/AndroidRuntime(411):  at android.app.ActivityThread.main(ActivityThread.java:3683)
11-22 14:48:22.657: E/AndroidRuntime(411):  at java.lang.reflect.Method.invokeNative(Native Method)
11-22 14:48:22.657: E/AndroidRuntime(411):  at java.lang.reflect.Method.invoke(Method.java:507)
11-22 14:48:22.657: E/AndroidRuntime(411):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-22 14:48:22.657: E/AndroidRuntime(411):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-22 14:48:22.657: E/AndroidRuntime(411):  at dalvik.system.NativeStart.main(Native Method)
11-22 14:59:44.668: W/KeyCharacterMap(441): No keyboard for id 0
11-22 14:59:44.668: W/KeyCharacterMap(441): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
11-22 14:59:53.378: D/AndroidRuntime(441): Shutting down VM
11-22 14:59:53.388: W/dalvikvm(441): threadid=1: thread exiting with uncaught exception (group=0x40015560)
11-22 14:59:53.411: E/AndroidRuntime(441): FATAL EXCEPTION: main
11-22 14:59:53.411: E/AndroidRuntime(441): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.samelayout/com.samelayout.Login}; have you declared this activity in your AndroidManifest.xml?
11-22 14:59:53.411: E/AndroidRuntime(441):  at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1405)
11-22 14:59:53.411: E/AndroidRuntime(441):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1379)
11-22 14:59:53.411: E/AndroidRuntime(441):  at android.app.Activity.startActivityForResult(Activity.java:2827)
11-22 14:59:53.411: E/AndroidRuntime(441):  at com.samelayout.SameLayoutActivity$1.onClick(SameLayoutActivity.java:38)
11-22 14:59:53.411: E/AndroidRuntime(441):  at android.view.View.performClick(View.java:2485)
11-22 14:59:53.411: E/AndroidRuntime(441):  at android.view.View$PerformClick.run(View.java:9080)
11-22 14:59:53.411: E/AndroidRuntime(441):  at android.os.Handler.handleCallback(Handler.java:587)
11-22 14:59:53.411: E/AndroidRuntime(441):  at android.os.Handler.dispatchMessage(Handler.java:92)
11-22 14:59:53.411: E/AndroidRuntime(441):  at android.os.Looper.loop(Looper.java:123)
11-22 14:59:53.411: E/AndroidRuntime(441):  at android.app.ActivityThread.main(ActivityThread.java:3683)
11-22 14:59:53.411: E/AndroidRuntime(441):  at java.lang.reflect.Method.invokeNative(Native Method)
11-22 14:59:53.411: E/AndroidRuntime(441):  at java.lang.reflect.Method.invoke(Method.java:507)
11-22 14:59:53.411: E/AndroidRuntime(441):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-22 14:59:53.411: E/AndroidRuntime(441):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-22 14:59:53.411: E/AndroidRuntime(441):  at dalvik.system.NativeStart.main(Native Method)
11-22 15:04:53.512: I/Process(441): Sending signal. PID: 441 SIG: 9

6.android 清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.samelayout"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name">
        <activity
            android:label="@string/app_name"
            android:name=".SameLayoutActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity

            android:name=".Login" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>

    </application>

</manifest>

Answer 1

在 SameLayoutActivity 中替换此代码，

 btnlogin.setOnClickListener(new OnClickListener()
        {           public void onClick(View v) {
                String str1=Myusername.getText().toString();
                String str2=Mypassword.getText().toString();
                Intent int1=new Intent(SameLayoutActivity.this,Login.class);
                Bundle b= new Bundle();
                b.putString("userdata", str1);
                b.putString("userdata1", str2);
                int1.putExtras(b);
                //(int1);
                startActivityForResult(int1, 0);
            }
        });

在您的登录活动中，替换此代码，然后重试并让我知道发生了什么..

  TextView tv1=(TextView)findViewById(R.id.text1);
  TextView tv2=(TextView)findViewById(R.id.text2);
if(b!=null)
        {
            String str1=b.getString("userdata");
            String str2=b.getString("userdata1");

            tv1.setText(str1);
            tv2.setText(str2);
            }
    }

清单文件：

    <uses-sdk android:minSdkVersion="10" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name">
        <activity
            android:label="@string/app_name"
            android:name=".SameLayoutActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".Login"> </activity>
    </application>

</manifest>

Answer 2

您需要通过用于启动第二个 Activity 的 Intent 传递数据。查看这篇博客文章。

Answer 3

设置数据绑定来轻松实现这一点。

dataBinding {
    enabled = true
}

您可以通过在 Build.gradle(:app) 内部

现在，要将数据从一个 xml 发送到另一个 xml，请查看下面的示例。在此，我制作了一个名为 item_top_card.xml 的布局，我想将其包含在另一个具有不同标题的 xml 文件中。一种方法是为不同的标题制作不同的 xml。一种好方法是将标题字符串从一个 xml 传递到另一个 xml，如下所示：

<include
   android:id="@+id/todays_clicks_parent"
   app:option="@{@string/todays_clicks}"
   layout="@layout/item_top_card" />

您可以包含要包含在其他 xml 文件中的布局 xml，如上所示。请注意，这里我们在“option”参数中传递字符串。这是参数名称，可以根据您的需要进行更改。以下是 item_top_card.xml 的文件：

<?xml version="1.0" encoding="utf-8"?>
<layout 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">

    <data>
        <variable name="option" type="java.lang.String"/>
    </data>

    <com.google.android.material.card.MaterialCardView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:minWidth="120dp"
        android:minHeight="120dp"
        android:layout_marginLeft="16dp"
        android:background="@color/transparent"
        app:cardBackgroundColor="@color/white"
        app:cardElevation="0.1dp"
        app:cardCornerRadius="8dp">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingVertical="12dp"
            android:paddingLeft="12dp"
            android:paddingRight="24dp">

            <ImageView
                android:id="@+id/icon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:background="@drawable/background_circle"
                android:backgroundTint="@color/purple_light"
                android:paddingHorizontal="12dp"
                android:paddingVertical="12dp"
                android:src="@drawable/clicks"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <TextView
                android:id="@+id/title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:lineHeight="24dp"
                android:text="123"
                android:paddingVertical="5dp"
                android:paddingLeft="5dp"
                android:lineSpacingExtra="5sp"
                android:textColor="@color/black"
                android:textFontWeight="600"
                android:textSize="16sp"
                app:layout_constraintStart_toStartOf="@+id/icon"
                app:layout_constraintTop_toBottomOf="@+id/icon" />

            <TextView
                android:id="@+id/description"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:lineHeight="20dp"
                tools:text="@string/todays_clicks"
                android:text="@{option}"
                android:paddingLeft="5dp"
                android:layout_marginTop="4dp"
                android:textColor="@color/light_grey_text_color"
                android:textSize="14sp"
                android:lineSpacingExtra="3sp"
                app:layout_constraintStart_toStartOf="@+id/title"
                app:layout_constraintTop_toBottomOf="@+id/title" />

        </androidx.constraintlayout.widget.ConstraintLayout>


    </com.google.android.material.card.MaterialCardView>
</layout>