android之初识Intent

时间:2023-03-09 14:41:22
android之初识Intent

首先修改values\strings.xml文件

代码如下:

<resources>

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

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

	<string name="app_title">Intent操作</string>
<string name="send_name">发送Intent的Activity程序.</string>
<string name="receive_name">接收Intent的Activity程序.</string>
</resources>

  然后定义send_main.xml文件

代码如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/MyLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
tools:context=".MainActivity">
<Button
android:id="@+id/mybut"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="按下将跳转到另一个Activity程序"/>
</LinearLayout>

  相应的定义Send.java类

代码如下:

package com.example.mytab;

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; public class Send extends Activity {
private Button mybut = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.send_main);
this.mybut = (Button)super.findViewById(R.id.mybut);
this.mybut.setOnClickListener(new OnClickListenerlmpl());
}
public class OnClickListenerlmpl implements OnClickListener{
public void onClick(View view){
Intent it = new Intent(Send.this,Receive.class);
it.putExtra("myinfo", "嗨,朋友");
Send.this.startActivity(it);
}
}
}

  对于Receive,有相应的定义

首先receive_main.xml文件

代码如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/MyLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/show"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>

  然后定义Receive.java类

代码如下:

package com.example.mytab;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView; public class Receive extends Activity{
private TextView show = null;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
super.setContentView(R.layout.receive_main);
this.show = (TextView)super.findViewById(R.id.show);
Intent it = super.getIntent();
String info = it.getStringExtra("myinfo");
this.show.setText(info);
}
}

  最后需要修改相应的Mainifest.xml文件,增加新的Activity程序

代码如下:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mytab"
android:versionCode="1"
android:versionName="1.0" > <uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="15" /> <application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="Send"
android:label="@string/send_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="Receive"
android:label="@string/receive_name"/>
</application> </manifest>

  运行效果:

android之初识Intent

点击后跳转到另一个Activity类中,并传递消息

android之初识Intent