android开发_Intent_requestCode_resultCode页面之间的跳转

<?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="请输入:"
/>
<EditText
android:id="@+id/et_input"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="内容"
></EditText>
<Button
android:id="@+id/btn_send"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="跳转"
></Button>
</LinearLayout>

package com.b510;

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;
import android.widget.Toast;

public class MainActivity extends Activity {
/** 定义一个输入框 */
private EditText et_input;
/** 定义一个按钮 */
private Button btn_send;
/** 定义一个requestCode为0 */
private final static int REQUEST_CODE = 0;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

et_input = (EditText) findViewById(R.id.et_input);
btn_send = (Button) findViewById(R.id.btn_send);
btn_send.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,
ReceiveAcitivity.class);
// 把et_input输入框中的信息设置在参数msg中
intent.putExtra("msg", et_input.getText().toString());
// 执行跳转
startActivityForResult(intent, REQUEST_CODE);
}
});
}

/**
* 当从其他页面返回来的时候，会调用此方法
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE) {
if (resultCode == ReceiveAcitivity.RUSULT_CODE_1) {
Toast.makeText(MainActivity.this, "这是从ReceiveActivity类回来的响应",
Toast.LENGTH_LONG).show();
}
}
}
}

<?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="你输入的是:"
/>
<TextView
android:id="@+id/tv_receive"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>

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

package com.b510;

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;

/**
* @author Hongten
*
*/
public class ReceiveAcitivity extends Activity {

/** 定义一个resultCode=1 */
public final static int RUSULT_CODE_1 = 1;
/** 定义一个接受消息的TextView */
private TextView tv_receive;
/** 定义一个返回按钮 */
private Button btn_return;
/** 定义一个Intent对象 */
Intent intent;

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

tv_receive = (TextView) findViewById(R.id.tv_receive);
btn_return = (Button) findViewById(R.id.btn_return);
intent = getIntent();
// 接收从MainActivity类传递过来的信息msg
String msg = intent.getStringExtra("msg");
// 设置tv_receive的值为msg
tv_receive.setText(msg);
// 当点击返回按钮的时候，返回到MainActivity类
btn_return.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
setResult(RUSULT_CODE_1);
finish();// finish本Activity
}
});
}
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.b510"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="9" />

<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".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=".ReceiveAcitivity"
android:label="@string/app_name">
</activity>
</application>
</manifest>