Android Activity之间的传值示例

时间：2024-04-15 16:10:09

AndroidManifest.xml

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

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="online.geekgalaxy.activityargsdelivery">

    <application

        android: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">

        <activity android:name=".MainActivity">

            <intent-filter>

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

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

            </intent-filter>

        </activity>

        <activity

        android:name=".MyActivity"

        android:label="@string/title_activity_my_activity2" >

        </activity>

    </application>

</manifest>

MainActivity.java

package online.geekgalaxy.activityargsdelivery;

import android.content.Intent;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.RadioButton;

import android.widget.RadioGroup;

public class MainActivity extends AppCompatActivity {

    private Button btnregister;

    private EditText editname;

    private RadioGroup rad;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

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

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

        rad = (RadioGroup)findViewById(R.id.radioGroup);

        btnregister.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                String name,sex = "";

                Intent it = new Intent(MainActivity.this,MyActivity.class);

                name = editname.getText().toString();

                //遍历RadioGroup找出被选中的单选按钮

                for(int i = 0;i < rad.getChildCount();i++)

                {

                    RadioButton rd = (RadioButton)rad.getChildAt(i);

                    if(rd.isChecked())

                    {

                        sex = rd.getText().toString();

                        break;

                    }

                }

                //新建Bundle对象,并把数据写入

                Bundle bd = new Bundle();

                bd.putCharSequence("user",name);

                bd.putCharSequence("sex",sex);

                //将数据包Bundle绑定到Intent上

                it.putExtras(bd);

                startActivity(it);

                //关闭第一个Activity

                finish();

            }

        });

    }

}

MyActivity.java

package online.geekgalaxy.activityargsdelivery;

/**

 * Created by jailman on 2017/10/17.

 */

import android.content.Intent;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.widget.TextView;

public class MyActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_2);

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

        //获得Intent对象,并且用Bundle出去里面的数据

        Intent it = getIntent();

        Bundle bd = it.getExtras();

        //按键值的方式取出Bundle中的数据

        String name = bd.getCharSequence("user").toString();

        String sex = bd.getCharSequence("sex").toString();

        txtshow.setText("尊敬的"+ name + " " + sex + "士"+"恭喜你,注册成功~");

    }

}

layout

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    tools:context=".MainActivity">

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="horizontal">

        <TextView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="请输入注册信息:"/>

    </LinearLayout>

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="horizontal">

        <TextView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="用户名:"/>

        <EditText

            android:hint="请输入用户名"

            android:id="@+id/editname"

            android:layout_width="match_parent"

            android:layout_height="wrap_content" />

    </LinearLayout>

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="horizontal">

        <TextView

            android:layout_marginTop="10dp"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="性   别:"

            />

        <RadioGroup

            android:id="@+id/radioGroup"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:orientation="horizontal">

            <RadioButton

                android:id="@+id/btnman"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:text="男"

                android:checked="true"/>

            <RadioButton

                android:id="@+id/btnwoman"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:text="女"/>

        </RadioGroup>

    </LinearLayout>

    <Button

        android:id="@+id/btnregister"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="注册"/>

</LinearLayout>

activity_2.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context="online.geekgalaxy.activityargsdelivery.MyActivity">

    <TextView

        android:id="@+id/txtshow"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" />

</RelativeLayout>

values

strings.xml

<resources>

    <string name="app_name">ActivityArgsDelivery</string>

    <string name="hello_world">Hello world!</string>

    <string name="action_settings">Settings</string>

    <string name="title_activity_my_activity2">MyActivity2</string>

</resources>

build.gradle

apply plugin: 'com.android.application'

android {

    compileSdkVersion 26

    buildToolsVersion "26.0.2"

    defaultConfig {

        applicationId "online.geekgalaxy.activityargsdelivery"

        minSdkVersion 25

        targetSdkVersion 26

        versionCode 1

        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

}

dependencies {

    compile fileTree(dir: 'libs', include: ['*.jar'])

    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {

        exclude group: 'com.android.support', module: 'support-annotations'

    })

    compile 'com.android.support:appcompat-v7:26.+'

    compile 'com.android.support.constraint:constraint-layout:1.0.2'

    testCompile 'junit:junit:4.12'

}

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