实现Activity之间跳转

最新推荐文章于 2025-06-27 15:32:43 发布

原创最新推荐文章于 2025-06-27 15:32:43 发布 · 786 阅读

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本文介绍了一个简单的Android应用程序，演示了从一个活动（Activity）跳转到另一个活动的过程。通过MainActivity类和SecondActivity类的定义，展示了如何实现按钮点击触发的界面跳转，并附带了相应的XML布局文件。

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MainActivity.java

package com.wxh.jump;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    
    //android中任何可视化的控件的父类都是View
    public void jump(View view)
    {
    	//多态
    	Toast.makeText(this, "按钮被点击", Toast.LENGTH_SHORT).show();
    	Intent intent=new Intent(this,SecondActivity.class);
    	//启动activity
    	this.startActivity(intent);
    	//销毁当前Activity
    	this.finish();
    }
}

SecondActivity.java

package com.wxh.jump;

import android.app.Activity;
import android.os.Bundle;

public class SecondActivity extends Activity{

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		setContentView(R.layout.second);
		
	}
}

layout

activity_main.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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >
	
    <Button 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/btn_txt"
        android:onClick="jump"
        />
  

</RelativeLayout>

second.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="这是第二个界面"
        />
</LinearLayout>

values

strings.xml

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

    <string name="app_name">界面跳转</string>
    <string name="action_settings">Settings</string>
    <string name="hello_world">Hello world!</string>
    <string name="btn_txt">跳转到下一个界面</string>

</resources>

AndroidManifest.xml

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

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.wxh.jump.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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