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Activity之切换与参数传递
来源:互联网   发布日期:2016-01-14 10:03:56   浏览:1833次  

导读:实现功能:1.两个Activity之间的切换2.两个Activity带返回值的切换效果图:点击切换Activity,或带返回值的Activity,出现:点击关闭,其中带返回值的效果如下:importandroid.app.Activity;importandroid.content......

实现功能:

1.两个Activity之间的切换

2.两个Activity带返回值的切换

效果图:

点击切换Activity,或带返回值的Activity,出现:

点击关闭,其中带返回值的效果如下:

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.TextView;

public class Main extends Activity

{

Button button;

Button button2;

TextView textView;

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

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

button2=(Button)findViewById(R.id.button2);

textView=(TextView)findViewById(R.id.display);

button.setOnClickListener(new OnClickListener()

{

@Override

public void onClick(View v)

{

/**

* 向新activity传参数

*/

Intent intent= new Intent(Main.this, OtherActivity.class);

intent.putExtra("age", 10);

intent.putExtra("name", "lingming");

Main.this.startActivity(intent);

}

});

button2.setOnClickListener(new OnClickListener()

{

@Override

public void onClick(View v)

{

/**

* 带返回值的Activity切换

*/

Intent intent= new Intent(Main.this, OtherActivity.class);

intent.putExtra("age", 10);

intent.putExtra("name", "lingming");

Main.this.startActivityForResult(intent, 3);//3是标示请求码,随便写

}

});

}

/**

*接收带有返回值的Activity方法

*/

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data)

{

super.onActivityResult(requestCode, resultCode, data);

textView.setText("requestCode:"+requestCode+'\n'+

"resultCode:"+resultCode+'\n'+

"接收到:"+data.getStringExtra("返回值")

);

}

}

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.TextView;

public class OtherActivity extends Activity

{

TextView textView;

Button button;

@Override

protected void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.otherui);

Intent intent=this.getIntent();

int age=intent.getIntExtra("age", 0);

String name=intent.getStringExtra("name");

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

textView.setText("年龄:"+age+'\n'+"姓名:"+name);

button=(Button)findViewById(R.id.finish);

button.setOnClickListener(new OnClickListener()

{

@Override

public void onClick(View v)

{

Intent intent=new Intent();

intent.putExtra("返回值", "这是返回值");

OtherActivity.this.setResult(12, intent);

OtherActivity.this.finish();

}

});

}

}

main.xml

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

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

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="这是MainActivity"

/>

<Button

android:text="切换Activity"

android:id="@+id/button"

android:layout_width="wrap_content"

android:layout_height="wrap_content"></Button>

<Button

android:text="带返回值的Activity"

android:id="@+id/button2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"></Button>

<TextView

android:id="@+id/display"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

/>

</LinearLayout>

otherui.xml

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

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

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="这是新的Activity"

/>

<TextView

android:id="@+id/textView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"></TextView>

<Button

android:text="关闭"

android:id="@+id/finish"

android:layout_width="wrap_content"

android:layout_height="wrap_content"></Button>

</LinearLayout>

注意第二个Activity要在AndroidMainfest.xml中进行配置

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

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

package="com.luku.mulActivity"

android:versionCode="1"

android:versionName="1.0">

<uses-sdk android:minSdkVersion="8" />

<application android:icon="@drawable/icon" android:label="@string/app_name">

<activity android:name=".Main"

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=".OtherActivity"

android:label="@string/app_name">

</activity>

</application>

</manifest>

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相关热词: Activity 切换 参数 传递

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